The SemiQTM Family of DC-DC converters provides a high efficiency single output in a size that is only 60% of industry-standard quarter-bricks, while preserving the same pinout and functionality. In high temperature environments, for output voltages ranging from 3.3 V to 1.0 V, the thermal performance of SemiQTM converters exceeds that of most competitors' 20 -30 A quarter-bricks. This is accomplished through the use of patent pending circuit, packaging and processing techniques to achieve ultra-high efficiency, excellent thermal management and a very low body profile. Low body profile and the preclusion of heat sinks minimize airflow shadowing, thus enhancing cooling for downstream devices. The use of 100% automation for assembly, coupled with advanced electric and thermal design, results in a product with extremely high reliability. Operating from an 18-36 V input, the SQ24 Series converters of the SemiQTM Family provide any standard output voltage from 12 V down to 1.0 V. Outputs can be trimmed from -20% to +10% of the nominal output voltage (10% for output voltages 1.2 V and 1.0 V), thus providing outstanding design flexibility. With a standard pinout and trim equations, the SQ24 Series converters are perfect drop-in replacements for existing quarter brick designs. Inclusion of this converter in new designs can result in significant board space and cost savings. The device is also available in a surface mount package. In both cases the designer can expect reliability improvement over other available converters because of the SQ24 Series' optimized thermal efficiency. 18-36 VDC Input; Outputs from 1-12 VDC Available in through-hole and SM packages Outputs available in 12.0, 8.0, 6.0, 5.0, 3.3, 2.5, 2.0, 1.8, 1.5, 1.2 & 1.0 V High efficiency - no heat sink required On-board input differential LC-filter Extremely low output and input ripple Start-up into pre-biased output No minimum load required Fixed-frequency operation Fully protected Remote output sense Output voltage trim range: +10%/-20% (except 1.2 V and 1.0 V outputs with trim range 10%) with industry standard trim equations High reliability: MTBF of 3.4 million hours, calculated per Telcordia TR332, Method I Case 1 Positive or negative logic ON/OFF option All materials meet UL94, V-0 flammability rating Approved to the latest edition and amendment of ITE Safety standards, UL/CSA 60950-1 and IEC60950-1 RoHS lead-free solder and lead-solder-exempted products are available Asia-Pacific +86 755 298 85888 Europe, Middle East +353 61 225 977 (c) 2015 Bel Power Solutions, Inc. North America +1 866 513 2839 BCD.00706_AA 2 1. ELECTRICAL SPECIFICATIONS Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, All output voltages, unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS 0 40 VDC Operating Ambient Temperature -40 85 C Storage Temperature -55 125 C Absolute Maximum Ratings Input Voltage Continuous Input Characteristics Operating Input Voltage Range 18 24 36 VDC Turn-on Threshold 16 17 17.5 VDC Turn-off Threshold 15 16 16.5 VDC Input Under Voltage Lockout (Non-latching) Isolation Characteristics I/O Isolation 2000 Isolation Capacitance VDC 1.0 - 3.3 V 160 pF 5.0 - 6.0 V 260 pF 8.0 V, 12 V 230 pF Isolation Resistance 10 M Feature Characteristics Switching Frequency 415 kHz Industry-std. equations (1.5 - 12 V) -20 +10 % Industry-std. equations (1.0 - 1.2 V) -10 +10 % +10 % Output Voltage Trim Range1 Remote Sense Compensation 1 Percent of VOUT(NOM) Non-latching (1.5 - 12 V) 117 125 140 % Non-latching (1.0 - 1.2 V) 124 132 140 % Output Over-Voltage Protection Auto-Restart Period Applies to all protection features Turn-On Time 100 ms 4 ms Converter Off -20 0.8 VDC Converter On 2.4 20 VDC Converter Off 2.4 20 VDC Converter On -20 0.8 VDC ON/OFF Control (Positive Logic) ON/OFF Control (Negative Logic) 1 Vout can be increased up to 10% via the sense leads or up to 10% via the trim function, however total output voltage trim from all sources should not exceed 10% of VOUT(NOM), in order to insure specified operation of over-voltage protection circuitry. See "Output Voltage Adjust/Trim" for detailed information. tech.support@psbel.com 3 2. 2.1 OPERATIONS INPUT AND OUTPUT IMPEDANCE These power converters have been designed to be stable with no external capacitors when used in low inductance input and output circuits. However, in many applications, the inductance associated with the distribution from the power source to the input of the converter can affect the stability of the converter. The addition of a 100 F electrolytic capacitor with an ESR < 1 across the input helps ensure stability of the converter. In many applications, the user has to use decoupling capacitance at the load. The power converter will exhibit stable operation with external load capacitance up to 1000 F on 12 V, 2,200 F on 8.0 V, 10,000 F on 5.0 V - 6.0 V, and 15,000 F on 3.3 V - 1.0 V outputs. 2.2 ON/OFF (Pin 2) The ON/OFF pin is used to turn the power converter on or off remotely via a system signal. There are two remote control options available, positive logic and negative logic and both are referenced to Vin(-). Typical connections are shown in Fig. A. TM Vin (+) SemiQ Family Converter (Top View ) ON/OFF Vin Vout (+) SENSE (+) TRIM Rload SENSE (-) Vin (-) Vout (-) CONTROL INPUT Fig. A: Circuit configuration for ON/OFF function. The positive logic version turns on when the ON/OFF pin is at logic high and turns off when at logic low. The converter is on when the ON/OFF pin is left open. The negative logic version turns on when the pin is at logic low and turns off when the pin is at logic high. The ON/OFF pin can be hard wired directly to Vin(-) to enable automatic power up of the converter without the need of an external control signal. ON/OFF pin is internally pulled-up to 5 V through a resistor. A mechanical switch, open collector transistor, or FET can be used to drive voltage source (20V maximum) may be connected directly to the ON/OFF input, in which case it must be capable of sourcing or sinking up to 1mA depending on the signal polarity. See the Start-up Information section for system timing waveforms associated with use of the ON/OFF pin. 2.3 REMOTE SENSE (PINS 5 AND 7) The remote sense feature of the converter compensates for voltage drops occurring between the output pins of the converter and the load. The SENSE(-) (Pin 5) and SENSE(+) (Pin 7) pins should be connected at the load or at the point where regulation is required (see Fig. B). TM Vin (+) SemiQ Family Converter Rw Vout (+) 100 (Top View ) Vin ON/OFF SENSE (+) TRIM Rload SENSE (-) 10 Vin (-) Vout (-) Rw Fig. B: Remote sense circuit configuration. tech.support@psbel.com 4 If remote sensing is not required, the SENSE(-) pin must be connected to the Vout(-) pin (Pin 4), and the SENSE(+) pin must be connected to the Vout(+) pin (Pin 8) to ensure the converter will regulate at the specified output voltage. If these connections are not made, the converter will deliver an output voltage that is slightly higher than the specified value. Because the sense leads carry minimal current, large traces on the end-user board are not required. However, sense traces should be located close to a ground plane to minimize system noise and insure optimum performance. When wiring discretely, twisted pair wires should be used to connect the sense lines to the load to reduce susceptibility to noise. The converter's output over-voltage protection (OVP) senses the voltage across Vout(+) and Vout(-), and not across the sense lines, so the resistance (and resulting voltage drop) between the output pins of the converter and the load should be minimized to prevent unwanted triggering of the OVP. When utilizing the remote sense feature, care must be taken not to exceed the maximum allowable output power capability of the converter, equal to the product of the nominal output voltage and the allowable output current for the given conditions. When using remote sense, the output voltage at the converter can be increased by as much as 10% above the nominal rating in order to maintain the required voltage across the load. Therefore, the designer must, if necessary, decrease the maximum current (originally obtained from the derating curves) by the same percentage to ensure the converter's actual output power remains at or below the maximum allowable output power. 2.4 OUTPUT VOLTAGE ADJUST/TRIM (PIN 6) The converter's output voltage can be adjusted up 10% or down 20% for Vout 1.5V, and 10% for Vout = 1.2V and 1.0 V, relative to the rated output voltage by the addition of an externally connected resistor. For output voltages 3.3V, trim up to 10% is guaranteed only at Vin 20V, and it is marginal (8% to 10%) at Vin = 18V depending on load current. The TRIM pin should be left open if trimming is not being used. To minimize noise pickup, a 0.1 F capacitor is connected internally between the TRIM and SENSE(-) pins. To increase the output voltage, refer to Fig. C. A trim resistor, RT-INCR, should be connected between the TRIM (Pin 6) and SENSE(+) (Pin 7), with a value of: RTINCR RTINCR 485 RTINCR 323 2 [k] (1.0 V) 5.11(100 )V ONOM 626 10.22 1.225 [k] (1.5-12 V) [k] (1.2 V) where, RTINCR Required value of trim-up resistor [k] VONOM Nominal value of output voltage [V] VOREQ (VO-REQ VO-NOM ) X 100 VO -NOM [%] Desired (trimmed) output voltage [V]. When trimming up, care must be taken not to exceed the converter`s maximum allowable output power. See previous section for a complete discussion of this requirement. TM Vin (+) SemiQ Family Converter (Top View ) Vin ON/OFF Vout (+) SENSE (+) R T-INCR TRIM Rload SENSE (-) Vin (-) Vout (-) Fig. C: Configuration for increasing output voltage. tech.support@psbel.com 5 To decrease the output voltage (Fig. D), a trim resistor, RT-DECR, should be connected between the TRIM (Pin 6) and SENSE(-) (Pin 5), with a value of: RTDECR 511 10.22 || [k] (1.0 - 12 V) where, RTDECR Required value of trim-down resistor [k] and is defined above. Note: The above equations for calculation of trim resistor values match those typically used in conventional industry standard quarter bricks and one-eighth bricks. Converters with output voltage 1.2V and 1.0V have specific trim schematic and equations, to provide the customers with the flexibility of second sourcing. For these converters, the last character of part number is "T". More information about trim feature, including corresponding schematic portions, can be found in Application Note 103. TM Vin (+) SemiQ Family Converter (Top View ) ON/OFF Vin Vout (+) SENSE (+) TRIM Rload R T-DECR SENSE (-) Vin (-) Vout (-) Fig. D: Configuration for decreasing output voltage. Trimming/sensing beyond 110% of the rated output voltage is not an acceptable design practice, as this condition could cause unwanted triggering of the output over-voltage protection (OVP) circuit. The designer should ensure that the difference between the voltages across the converter's output pins and its sense pins does not exceed 10% of VOUT(NOM), or: [VOUT() VOUT()] [VSENSE() VSENSE()] VO - NOM X 10% [V] This equation is applicable for any condition of output sensing and/or output trim. 3. 3.1 PROTECTION FEATURES INPUT UNDERVOLTAGE LOCKOUT Input undervoltage lockout is standard with this converter. The converter will shut down when the input voltage drops below a predetermined voltage. The input voltage must be at least 17.5V for the converter to turn on. Once the converter has been turned on, it will shut off when the input voltage drops below 15V. This feature is beneficial in preventing deep discharging of batteries used in telecom applications. 3.2 OUTPUT OVERCURRENT PROTECTION (OCP) The converter is protected against overcurrent or short circuit conditions. Upon sensing an overcurrent condition, the converter will switch to constant current operation and thereby begin to reduce output voltage. When the output voltage drops below 50% of the nominal value of output voltage, the converter will shut down. Once the converter has shut down, it will attempt to restart nominally every 100 ms with a typical 1-2% duty cycle. The attempted restart will continue indefinitely until the overload or short circuit conditions are removed or the output voltage rises above 50% of its nominal value. 3.3 OUTPUT OVERVOLTAGE PROTECTION (OVP) The converter will shut down if the output voltage across Vout(+) (Pin 8) and Vout(-) (Pin 4) exceeds the threshold of the OVP circuitry. The OVP circuitry contains its own reference, independent of the output voltage regulation loop. Once the converter has shut down, it will attempt to restart every 100 ms until the OVP condition is removed. tech.support@psbel.com 6 3.4 OVERTEMPERATURE PROTECTION (OTP) The converter will shut down under an overtemperature condition to protect itself from overheating caused by operation outside the thermal derating curves, or operation in abnormal conditions such as system fan failure. After the converter has cooled to a safe operating temperature, it will automatically restart. 3.5 SAFETY REQUIREMENTS The converters meet the requirements of the latest edition and amendment of ITE Safety standards UL/CSA 60950-1. Basic Insulation is provided between input and output. To comply with safety agencies requirements, an input line fuse must be used external to the converter. The table below provides the recommended fuse rating for use with this family of products. OUTPUT VOLTAGE FUSE RATING 3.3 V 8A 12 V - 5.0 V, 2.5 V 6A 2.0 V - 1.0 V 4A If one input fuse is used for a group of modules, the maximum fuse rating should not exceed 15-A (SQ modules are UL approved with up to a 15-A fuse). 3.6 ELECTROMAGNETIC COMPATIBILITY (EMC) EMC requirements must be met at the end-product system level, as no specific standards dedicated to EMC characteristics of board mounted component dc-dc converters exist. However, Bel Power Solutions tests its converters to several system level standards, primary of which is the more stringent EN55022, Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement. With the addition of a simple external filter (see application notes), all versions of the SQ24 Series of converters pass the requirements of Class B conducted emissions per EN55022 and FCC, and meet at a minimum, Class A radiated emissions per EN 55022 and Class B per FCC Title 47CFR, Part 15-J. Please contact di/dt Applications Engineering for details of this testing. 4. 4.1 CHARACTERIZATION GENERAL INFORMATION The converter has been characterized for many operational aspects, to include thermal derating (maximum load current as a function of ambient temperature and airflow) for vertical and horizontal mounting, efficiency, start-up and shutdown parameters, output ripple and noise, transient response to load step-change, overload and short circuit. The figures are numbered as Fig. x.y, where x indicates the different output voltages, and y is associated with a specific plot (y = 1 for the vertical thermal derating, ...). For example, Fig. x.1 will refer to the vertical thermal derating for all the output voltages in general. The following pages contain specific plots or waveforms associated with the converter. Additional comments for specific data are provided below. 4.2 TEST CONDITIONS All data presented were taken with the converter soldered to a test board, specifically a 0.060" thick printed wiring board (PWB) with four layers. The top and bottom layers were not metalized. The two inner layers, comprising two-ounce copper, were used to provide traces for connectivity to the converter. The lack of metalization on the outer layers as well as the limited thermal connection ensured that heat transfer from the converter to the PWB was minimized. This provides a worst-case but consistent scenario for thermal derating purposes. All measurements requiring airflow were made in vertical and horizontal wind tunnel facilities using Infrared (IR) thermography and thermocouples for thermometry. Ensuring components on the converter do not exceed their ratings is important to maintaining high reliability. If one anticipates operating the converter at or close to the maximum loads specified in the derating curves, it is prudent to check actual operating temperatures in the application. Thermographic imaging is preferable; if this capability is not available, then thermocouples may be used. Bel Power Solutions recommends the use of AWG #40 gauge thermocouples to ensure measurement accuracy. Careful routing of the thermocouple leads will further minimize measurement error. Refer to Figure H for optimum measuring thermocouple location. tech.support@psbel.com 7 4.3 THERMAL DERATING Load current vs. ambient temperature and airflow rates are given in Fig. x.1 for through-hole version. Ambient temperature was varied between 25 C and 85 C, with airflow rates from 30 to 500 LFM (0.15 to 2.5 m/s), and vertical and horizontal converter mounting. For each set of conditions, the maximum load current was defined as the lowest of: (i) (ii) The output current at which any FET junction temperature did not exceed a maximum specified temperature (120 C) as indicated by the thermographic image, or The nominal rating of the converter (4 A on 12 V, 5.3 A on 8.0 V, 8 A on 6.0 V, 10 A on 5.0 V, and 15 A on 3.3 - 1.0 V). During normal operation, derating curves with maximum FET temperature less than or equal to 120 C should not be exceeded. Temperature on the PCB at the thermocouple location shown in Fig. H should not exceed 118 C in order to operate inside the derating curves. Fig. H: Location of the thermocouple for thermal testing. 4.4 EFFICIENCY Fig. x.5 shows the efficiency vs. load current plot for ambient temperature of 25 C, airflow rate of 300 LFM (1.5 m/s) with vertical mounting and input voltages of 18 V, 24 V and 36 V. Also, a plot of efficiency vs. load current, as a function of ambient temperature with Vin = 24 V, airflow rate of 200 LFM (1 m/s) with vertical mounting is shown in Fig. x.6. 4.5 POWER DISSIPATION Fig. x.7 shows the power dissipation vs. load current plot for Ta = 25 C, airflow rate of 300 LFM (1.5 m/s) with vertical mounting and input voltages of 18 V, 24 V and 36 V. Also, a plot of power dissipation vs. load current, as a function of ambient temperature with Vin = 24 V, airflow rate of 200 LFM (1 m/s) with vertical mounting is shown in Fig. x.8. 4.6 START-UP Output voltage waveforms, during the turn-on transient using the ON/OFF pin for full rated load currents (resistive load) are shown without and with external load capacitance in Fig. x.9 and Fig. x.10, respectively. 4.7 RIPPLE AND NOISE Fig. x.13 shows the output voltage ripple waveform, measured at full rated load current with a 10 F tantalum and 1 F ceramic capacitor across the output. Note that all output voltage waveforms are measured across a 1 F ceramic capacitor. The input reflected ripple current waveforms are obtained using the test setup shown in Fig x.14. The corresponding waveforms are shown in Fig. x.15 and Fig. x.16. tech.support@psbel.com 8 4.8 START-UP INFORMATION (USING NEGATIVE ON/OFF) Scenario #1: Initial Start-up From Bulk Supply ON/OFF function enabled, converter started via application of VIN. See Figure E. Comments ON/OFF pin is ON; system front end power is toggled on, VIN to converter begins to rise. t1 VIN crosses Under-Voltage Lockout protection circuit threshold; converter enabled. t2 Converter begins to respond to turn-on command (converter turn-on delay). t3 Converter VOUT reaches 100% of nominal value. For this example, the total converter start-up time (t3- t1) is typically 4 ms. VIN Time t0 ON/OFF STATE OFF ON VOUT t0 t1 t2 t t3 Fig. E: Start-up scenario #1 Scenario #2: Initial Start-up Using ON/OFF Pin With VIN previously powered, converter started via ON/OFF pin. See Figure F. Comments VINPUT at nominal value. Arbitrary time when ON/OFF pin is enabled (converter enabled). t2 End of converter turn-on delay. t3 Converter VOUT reaches 100% of nominal value. For this example, the total converter start-up time (t3- t1) is typically 4 ms. VIN Time t0 t1 ON/OFF STATE OFF ON VOUT t0 t1 t2 t t3 Fig. F: Start-up scenario #2. Scenario #3: Turn-off and Restart Using ON/OFF Pin With VIN previously powered, converter is disabled and then enabled via ON/OFF pin. See Figure G. Time Comments t0 VIN and VOUT are at nominal values; ON/OFF pin ON. t1 ON/OFF pin arbitrarily disabled; converter output falls to zero; turn-on inhibit delay period (100 ms typical) is initiated, and ON/OFF pin action is internally inhibited. t2 ON/OFF pin is externally re-enabled. If (t2- t1) 100 ms, external action of ON/OFF pin is locked out by start-up inhibit timer. If (t2- t1) > 100 ms, ON/OFF pin action is internally enabled. t3 Turn-on inhibit delay period ends. If ON/OFF pin is ON, converter begins turn-on; if off, converter awaits ON/OFF pin ON signal; see Figure F. t4 End of converter turn-on delay. t5 Converter VOUT reaches 100% of nominal value. For the condition, (t2- t1) 100 ms, the total converter start-up time (t5- t2) is typically 104 ms. For (t2- t1) > 100 ms, start-up will be typically 4 ms after release of ON/OFF pin. V IN ON/OFF STATE 100 ms OFF ON V OUT t1 t2 t3 t4 t5 Fig. G: Start-up scenario #3 tech.support@psbel.com t 9 SQ24T/S04120 (12.0 VOUT) 5. ELECTRICAL SPECIFICATIONS: SQ24T/S04120 (12 VOLTS OUT) Conditions: TA = 25C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 12 VDC unless otherwise specified. Input Characteristics Maximum Input Current 4 ADC, 12 VDC Out @ 18 VDC In 3.1 ADC Input Stand-by Current Vin = 24 V, converter disabled 3 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 100 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Output Characteristics Output Voltage Set Point (no load) 11.88 12.00 12.12 VDC Over Line 4 10 mV Over Load 4 10 mV 12.18 VDC 120 mVPK-PK 1000 F 4 ADC 5 5.5 ADC 7.5 10 A 1 Arms Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 11.82 90 0 Current Limit Inception Non-latching Peak Short-Circuit Current Non-latching. Short = 10 m. RMS Short-Circuit Current Non-latching Dynamic Response Co = 1 F ceramic 150 mV 1 F ceramic 200 mV 20 s 100% Load 87 % 50% Load 87 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 10 SQ24T/S04120 (12.0 VOUT) Ambient Temperature [C] Fig. 12V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T04120 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 120C. Ambient Temperature [C] Fig. 12V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T04120 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Ambient Temperature [C] Fig. 12V.3: Available load current vs. ambient temperature and airflow rates for SQ24S04120 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Ambient Temperature [C] Fig. 12V.4: Available load current vs. ambient temperature and airflow rates for SQ24S04120 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 0.80 0.80 36 V 24 V 18 V 0.75 70 C 55 C 40 C 0.75 0.70 0.70 0.65 0.65 0 1 2 3 4 Load Current [Adc] Fig. 12V.5: Efficiency vs. load current and input voltage for SQ24T/S04120 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 5 0 1 2 3 4 Load Current [Adc] Fig. 12V.6: Efficiency vs. load current and ambient temperature for SQ24T/S04120 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com 5 11 10.00 10.00 8.00 8.00 Power Dissipation [W] Power Dissipation [W] SQ24T/S04120 (12.0 VOUT) 6.00 4.00 36 V 24 V 18 V 2.00 6.00 4.00 70 C 55 C 40 C 2.00 0.00 0.00 0 1 2 3 4 Load Current [Adc] 5 0 1 2 3 4 Load Current [Adc] Fig. 12V.7: Power dissipation vs. load current and input voltage for SQ24T/S04120 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 12V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S04120 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 12V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (5 V/div.). Time scale: 1 ms/div. Fig. 12V.10: Turn-on transient at full rated load current (resistive) plus 1,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (5 V/div.). Time scale: 2 ms/div. Fig. 12V.11: Output voltage response to load current step-change (1A - 2A - 1A) at Vin = 24V. Top trace: output voltage (200 mV/div.). Bottom trace: load current (1 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.5 ms/div. Fig. 12V.12: Output voltage response to load current step-change (1A - 2A - 1A) at Vin = 24V. Top trace: output voltage (200 mV/div.). Bottom trace: load current (1 A/div.). Current slew rate: 5 A/s. Co = 1 F ceramic. Time scale: 0.5 ms/div. tech.support@psbel.com 5 12 SQ24T/S04120 (12.0 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 12V.13: Output voltage ripple (50 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 12V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 12V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 12V.14 for test setup. Time scale: 1 s/div. Fig. 12V.16: Input reflected ripple current, is (10 mA/div.), measured through 10H at the source at full rated load current and Vin = 24V. Refer to Fig. 12V.14 for test setup. Time scale: 1s/div. 15 Vout [Vdc] 10 5 0 0 1 2 3 4 5 Iout [Adc] Fig. 12V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. 6 Fig. 12V.18: Load current (top trace, 5 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (5 A/div., 1 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 13 SQ24T/S05080 (8.0 VOUT) 6. ELECTRICAL SPECIFICATIONS: SQ24T/S05080 (8.0 VOLTS OUT) Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 8.0 VDC unless otherwise specified. Input Characteristics Maximum Input Current 5.3 ADC, 8.0 VDC Out @ 18 VDC In 2.8 ADC Input Stand-by Current Vin = 24 V, converter disabled 2.6 Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 68 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB mADC Output Characteristics Output Voltage Set Point (no load) 7.92 8.00 8.08 VDC Over Line 4 10 mV Over Load 4 10 mV 8.12 VDC 100 mVPK-PK 2200 F 5.3 ADC 6.25 6.75 ADC 10 12 A 1 Arms Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) 7.88 70 Output Current Range 0 Current Limit Inception Non-latching Peak Short-Circuit Current Non-latching. Short=10m. RMS Short-Circuit Current Non-latching Dynamic Response Co = 1 F ceramic 160 mV Co = 94 F tant. + 1 F ceramic 160 mV 400 s 100% Load 85.5 % 50% Load 87 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% 6 0.95 5 0.90 4 0.85 Efficiency Load Current [Adc] Efficiency 3 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 2 1 0.80 0.75 36 V 24 V 18 V 0.70 0 0.65 20 30 40 50 60 70 80 90 Ambient Temperature [C] Fig. 8.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T05080 converter with D height pins mounted vertically with Vin = 24 V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0 1 2 3 4 5 6 Load Current [Adc] Fig. 8.0V.2: Efficiency vs. load current and input voltage for SQ24T/S05080 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. tech.support@psbel.com 14 7. SQ24T/S08060 (6.0 VOUT) ELECTRICAL SPECIFICATIONS: SQ24T/S08060 (6.0 VOLTS OUT) Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 6.0 VDC unless otherwise specified. Input Characteristics Maximum Input Current 8 ADC, 6.0 VDC Out @ 18 VDC In 3.1 Input Stand-by Current Vin = 24 V, converter disabled 2.6 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 88 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD ADC dB Output Characteristics Output Voltage Set Point (no load) 5.940 6.000 6.060 VDC Over Line 2 5 mV Over Load 2 5 mV 6.090 VDC Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 5.910 45 0 60 mVPK-PK 10,000 F 8 ADC Current Limit Inception Non-latching 10 11.5 ADC Peak Short-Circuit Current Non-latching. Short=10m. 15 25 A RMS Short-Circuit Current Non-latching 2.5 Arms Dynamic Response Co = 1 F ceramic 100 mV Co = 450 F tant. + 1 F ceramic 80 mV 200 s 100% Load 89 % 50% Load 89 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 15 10 10 8 8 Load Current [Adc] Load Current [Adc] SQ24T/S08060 (6.0 VOUT) 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 4 2 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 4 2 0 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 10 10 8 8 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 2 70 80 90 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 4 2 0 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Fig. 6.0V.3: Available load current vs. ambient temperature and airflow rates for SQ24S08060 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Fig. 6.0V.4: Available load current vs. ambient temperature and airflow rates for SQ24S08060 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency 60 Fig. 6.0V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T08060 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Load Current [Adc] Load Current [Adc] Fig. 6.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T08060 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 4 50 Ambient Temperature [C] 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 Load Current [Adc] Fig. 6.0V.5: Efficiency vs. load current and input voltage for SQ24T/S08060 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 0 2 4 6 8 10 Load Current [Adc] Fig. 6.0V.6: Efficiency vs. load current and ambient temperature for SQ24T/S08060 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com SQ24T/S08060 (6.0 VOUT) 10.00 10.00 8.00 8.00 Power Dissipation [W] Power Dissipation [W] 16 6.00 4.00 72 V 48 V 36 V 2.00 6.00 4.00 70 C 55 C 40 C 2.00 0.00 0.00 0 2 4 6 8 10 Load Current [Adc] 0 2 4 6 8 10 Load Current [Adc] Fig. 6.0V.7: Power dissipation vs. load current and ambient temperature for SQ24T/S08060 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 6.0V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S08060 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 6.0V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (2 V/div.). Time scale: 1 ms/div. Fig. 6.0V.10: Turn-on transient at full rated load current (resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (2 V/div.). Time scale: 2 ms/div. Fig. 6.0V.11: Output voltage response to load current step-change (2A - 4A - 2A) at Vin = 24V. Top trace: output voltage (100mV/div.). Bottom trace: load current (2A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 6.0V.12: Output voltage response to load current step-change (2A - 4A - 2A) at Vin = 24V. Top trace: output voltage (100mV/div.). Bottom trace: load current (2A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com 17 SQ24T/S08060 (6.0 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 6.0V.13: Output voltage ripple (50 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 6.0V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 6.0V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 6.0V.14 for test setup. Time scale: 1 s/div. Fig. 6.0V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 6.0V.14 for test setup. Time scale: 1s/div. 8 Vout [Vdc] 6 4 2 0 0 3 6 9 Iout [Adc] Fig. 6.0V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. 12 Fig. 6.0V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 18 8. SQ24T/S08060 (5.0 VOUT) ELECTRICAL SPECIFICATIONS: SQ24T/S10050 (5.0 VOLTS OUT) Conditions: TA = 25 C, Airflow=300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 5.0 VDC unless otherwise specified. Input Characteristics Maximum Input Current 10 ADC, 5.0 VDC Out @ 18 VDC In 3.3 ADC Input Stand-by Current Vin = 24 V, converter disabled 3 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 93 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Output Characteristics Output Voltage Set Point (no load) 4.950 5.000 5.050 VDC Over Line 2 5 mV Over Load 2 5 mV 5.075 VDC 80 mVPK-PK 10,000 F 10 ADC 12.5 14 ADC 20 30 A 3 Arms Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 4.925 45 0 Current Limit Inception Non-latching Peak Short-Circuit Current Non-latching. Short=10 m. RMS Short-Circuit Current Non-latching Dynamic Response Co = 1 F ceramic 140 mV Co = 450 F tant. + 1 F ceramic 90 mV 200 s 100% Load 86 % 50% Load 87 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 19 SQ24T/S08060 (5.0 VOUT) Ambient Temperature [C] Fig. 5.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T10050 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Ambient Temperature [C] Fig. 5.0V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T10050 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Ambient Temperature [C] Fig. 5.0V.3: Available load current vs. ambient temperature and airflow rates for SQ24S10050 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C.. Ambient Temperature [C] Fig. 5.0V.4: Available load current vs. ambient temperature and airflow rates for SQ24S10050 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 0.80 0.80 36 V 24 V 18 V 0.75 70 C 55 C 40 C 0.75 0.70 0.70 0.65 0.65 0 2 4 6 8 10 Load Current [Adc] Fig. 5.0V.5: Efficiency vs. load current and input voltage for SQ24T/S10050 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 12 0 2 4 6 8 10 Load Current [Adc] Fig. 5.0V.6: Efficiency vs. load current and ambient temperature for SQ24T/S10050 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com 12 20 SQ24T/S08060 (5.0 VOUT) 10.00 10.00 Power Dissipation [W] 8.00 Power Dissipation [W] 8.00 6.00 4.00 36 V 24 V 18 V 2.00 6.00 4.00 70 C 55 C 40 C 2.00 0.00 0 0.00 0 2 4 6 8 10 Load Current [Adc] Fig. 5.0V.7: Power dissipation vs. load current and input voltage for SQ24T/S10050 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C.. 12 2 4 6 8 10 12 Load Current [Adc] Fig. 5.0V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S10050 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 5.0V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (2 V/div.). Time scale: 2 ms/div. Fig. 5.0V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (2 V/div.). Time scale: 2 ms/div. Fig. 5.0V.11: Output voltage response to load current step-change (2.5A - 5A - 2.5A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (2 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 5.0V.12: Output voltage response to load current step-change (2.5A - 5A - 2.5A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (2 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com 21 SQ24T/S08060 (5.0 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 5.0V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 5.0V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 5.0V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 5.0V.14 for test setup. Time scale: 1 s/div. Fig. 5.0V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 5.0V.14 for test setup. Time scale: 1s/div. 6.0 5.0 Vout [Vdc] 4.0 3.0 2.0 1.0 0 0 5 10 Iout [Adc] Fig. 5.0V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. 15 Fig. 5.0V.18: Load current (top trace, 10 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (10 A/div., 1 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 22 9. SQ24T/S15033 (3.3 VOUT) ELECTRICAL SPECIFICATIONS: SQ24T/S15033 (3.3 VOLTS OUT) Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 3.3 VDC unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS Input Characteristics Maximum Input Current 15 ADC, 3.3 VDC Out @ 18 VDC In 3.2 ADC Input Stand-by Current Vin = 24 V, converter disabled 3 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 100 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Output Characteristics Output Voltage Set Point (no load) 3.267 3.300 3.333 VDC Over Line 2 5 mV Over Load 2 5 mV 3.350 VDC 50 mVPK-PK 15,000 F 15 ADC Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 3.250 30 0 Current Limit Inception Non-latching 18 20 ADC Peak Short-Circuit Current Non-latching. Short=10m. 30 40 A RMS Short-Circuit Current Non-latching 5.3 Arms Dynamic Response Co = 1 F ceramic 100 mV Co = 450 F tant. + 1 F ceramic 100 mV 100 s 100% Load 88 % 50% Load 88 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 23 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15033 (3.3 VOUT) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 20 20 15 15 Load Current [Adc] Load Current [Adc] 70 80 90 Fig. 3.3V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15033 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Fig. 3.3V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15033 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Fig. 3.3V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15033 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency 60 Ambient Temperature [C] Fig. 3.3V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15033 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 5 50 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 3.3V.5: Efficiency vs. load current and input voltage for SQ24T/S15033 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 3.3V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15033 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com 24 SQ24T/S15033 (3.3 VOUT) 8.00 Power Dissipation [W] Power Dissipation [W] 8.00 6.00 4.00 36 V 24 V 18 V 2.00 6.00 4.00 70 C 55 C 40 C 2.00 0.00 0.00 0 2 4 6 8 10 12 14 16 Load Current [Adc] 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 3.3V.7: Power dissipation vs. load current and input voltage for SQ24T/S15033 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 3.3V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15033 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 3.3V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Fig. 3.3V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Fig. 3.3V.11: Output voltage response to load current step-change (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 3.3V.12: Output voltage response to load current step-change (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com 25 SQ24T/S15033 (3.3 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 3.3V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 3.3V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 3.3V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 3.3V.14 for test setup. Time scale: 1 s/div. Fig. 3.3V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 3.3V.14 for test setup. Time scale: 1s/div. 4 Vout [Vdc] 3 2 1 0 0 5 10 15 20 Iout [Adc] Fig. 3.3V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Fig. 3.3V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 1 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 26 SQ24T/S15025 (2.5 VOUT) 10. ELECTRICAL SPECIFICATIONS: SQ24T/S15025 (2.5 VOLTS OUT) Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 2.5 VDC unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS Input Characteristics Maximum Input Current 15 ADC, 2.5 VDC Out @ 18 VDC In 2.5 ADC Input Stand-by Current Vin = 24 V, converter disabled 3 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 67 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Output Characteristics Output Voltage Set Point (no load) 2.475 2.500 2.525 VDC Over Line 2 5 mV Over Load 2 5 mV 2.538 VDC 50 mVPK-PK 15,000 F 15 ADC Output Regulation Output Voltage Range Over line, load and temperature(-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 2.462 30 0 Current Limit Inception Non-latching 18 20 ADC Peak Short-Circuit Current Non-latching. Short = 10 m. 30 40 A RMS Short-Circuit Current Non-latching 5.3 Arms Dynamic Response Co = 1 F ceramic) 110 mV Co = 450 F tant. + 1 F ceramic 120 mV 150 s 100% Load 86.5 % 50% Load 87 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 27 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15025 (2.5 VOUT) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 20 20 15 15 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 0 70 80 90 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Fig. 2.5V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15025 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Fig. 2.5V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15025 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency 60 Fig. 2.5V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15025 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Load Current [Adc] Load Current [Adc] Fig. 2.5V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15025 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 5 50 Ambient Temperature [C] 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 2.5V.5: Efficiency vs. load current and input voltage for SQ24T/S15025 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 2.5V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15025 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com SQ24T/S15025 (2.5 VOUT) 8.00 8.00 6.00 6.00 Power Dissipation [W] Power Dissipation [W] 28 4.00 36 V 24 V 18 V 2.00 0.00 4.00 70 C 55 C 40 C 2.00 0.00 0 2 4 6 8 10 12 14 16 Load Current [Adc] 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 2.5V.7: Power dissipation vs. load current and input voltage for SQ24T/S15025 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 2.5V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15025 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 2.5V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 2.5V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 2.5V.11: Output voltage response to load current step-change (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 2.5V.12: Output voltage response to load current step-change (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com 29 SQ24T/S15025 (2.5 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 2.5V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 2.5V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 2.5V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 2.5V.14 for test setup. Time scale: 1 s/div. Fig. 2.5V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 2.5V.14 for test setup. Time scale: 1s/div. 3 Vout [Vdc] 2 1 0 0 5 10 15 20 Iout [Adc] Fig. 2.5V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Fig. 2.5V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 1 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 30 SQ24T/S15020 (2.0 VOUT) 11. ELECTRICAL SPECIFICATIONS: SQ24T/S15020 (2.0 VOLTS OUT) Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 2.0 VDC unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS 2 ADC Input Characteristics Maximum Input Current 15 ADC, 2.0 VDC Out @ 18 VDC In Input Stand-by Current Vin = 24 V, converter disabled 3 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 57 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Output Characteristics Output Voltage Set Point (no load) 1.98 2.000 2.02 VDC Over Line 2 5 mV Over Load 2 5 mV 2.030 VDC 50 mVPK-PK 15,000 F 15 ADC Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 1.970 30 0 Current Limit Inception Non-latching 18 20 ADC Peak Short-Circuit Current Non-latching. Short = 10 m. 30 40 A RMS Short-Circuit Current Non-latching 5.3 Arms Dynamic Response Co = 1 F ceramic 100 mV Co = 450 F tant. + 1 F ceramic 120 mV 150 s 100% Load 85 % 50% Load 85 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 31 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15020 (2.0 VOUT) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 20 20 15 15 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 0 70 80 90 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Fig. 2.0V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15020 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Fig. 2.0V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15020 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency 60 Fig. 2.0V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15020 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Load Current [Adc] Load Current [Adc] Fig. 2.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15020 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 5 50 Ambient Temperature [C] 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 2.0V.5: Efficiency vs. load current and input voltage for SQ24T/S15020 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 2.0V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15020 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com SQ24T/S15020 (2.0 VOUT) 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 32 4.00 3.00 2.00 36 V 24 V 18 V 1.00 4.00 3.00 2.00 70 C 55 C 40 C 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 Load Current [Adc] 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 2.0V.7: Power dissipation vs. load current and input voltage for SQ24T/S15020 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 2.0V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15020 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 2.0V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 2.0V.10: Turn-on transient at full rated load current (resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 2.0V.11: Output voltage response to load current step-change (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 2.0V.12: Output voltage response to load current step-change (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com 33 SQ24T/S15020 (2.0 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 2.0V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 2.0V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 2.0V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 2.0V.14 for test setup. Time scale: 1 s/div. Fig. 2.0V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 2.0V.14 for test setup. Time scale: 1s/div. 3 Vout [Vdc] 2 1 0 0 5 10 15 20 Iout [Adc] Fig. 2.0V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Fig. 2.0V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 34 SQ24T/S15018 (1.8 VOUT) 12. ELECTRICAL SPECIFICATIONS: SQ24T/S15018 (1.8 VOLTS OUT) Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 1.8 VDC unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS Input Characteristics Maximum Input Current 15 ADC, 1.8 VDC Out @ 18 VDC In 1.8 ADC Input Stand-by Current Vin = 24 V, converter disabled 3 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 53 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Output Characteristics Output Voltage Set Point (no load) 1.782 1.800 1.818 VDC Over Line 2 4 mV Over Load 2 5 mV 1.827 VDC 50 mVPK-PK 15,000 F 15 ADC Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 1.773 30 0 Current Limit Inception Non-latching 18 20 ADC Peak Short-Circuit Current Non-latching. Short = 10 m. 30 40 A RMS Short-Circuit Current Non-latching 5.3 Arms Dynamic Response Co = 1 F ceramic 100 mV Co = 450 F tant. + 1 F ceramic 120 mV 150 s 100% Load 84.5 % 50% Load 84 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 35 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15018 (1.8 VOUT) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 20 20 15 15 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 0 70 80 90 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Fig. 1.8V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15018 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Fig. 1.8V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15018 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency 60 Fig. 1.8V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15018 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Load Current [Adc] Load Current [Adc] Fig. 1.8V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15018 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 5 50 Ambient Temperature [C] 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.8V.5: Efficiency vs. load current and input voltage for SQ24T/S15018 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.8V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15018 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com SQ24T/S15018 (1.8 VOUT) 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 36 4.00 3.00 2.00 36 V 24 V 18 V 1.00 4.00 3.00 2.00 70 C 55 C 40 C 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 Load Current [Adc] 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.8V.7: Power dissipation vs. load current and input voltage for SQ24T/S15018 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 1.8V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15018 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 1.8V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 1.8V.10: Turn-on transient at full rated load current (resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 1.8V.11: Output voltage response to load current step-change (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 1.8V.12: Output voltage response to load current step-change (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com 37 SQ24T/S15018 (1.8 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 1.8V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 1.8V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 1.8V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 1.8V.14 for test setup. Time scale: 1 s/div. Fig. 1.8V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 1.8V.14 for test setup. Time scale: 1s/div. 3 Vout [Vdc] 2 1 0 0 5 10 15 Iout [Adc] Fig. 1.8V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. 20 Fig. 1.8V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 38 SQ24T/S15015 (1.5 VOUT) 13. ELECTRICAL SPECIFICATIONS: SQ24T/S15015 (1.5 VOLTS OUT) Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 1.5 VDC unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS Input Characteristics Maximum Input Current 15 ADC, 1.5 VDC Out @ 18 VDC In 1.6 ADC Input Stand-by Current Vin = 24 V, converter disabled 2.6 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 48 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Output Characteristics Output Voltage Set Point (no load) 1.485 1.500 1.515 VDC Over Line 2 4 mV Over Load 2 4 mV 1.523 VDC 50 mVPK-PK 15,000 F 15 ADC Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 1.477 30 0 Current Limit Inception Non-latching 18 20 ADC Peak Short-Circuit Current Non-latching. Short = 10 m. 30 40 A RMS Short-Circuit Current Non-latching 5.3 Arms Dynamic Response Co = 1 F ceramic 80 mV Co = 450 F tant. + 1 F ceramic 120 mV 170 s 100% Load 83 % 50% Load 83 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 39 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15015 (1.5 VOUT) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 20 20 15 15 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 0 70 80 90 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Fig. 1.5V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15015 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Fig. 1.5V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15015 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency 60 Fig. 1.5V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15015 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Load Current [Adc] Load Current [Adc] Fig. 1.5V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15015 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 5 50 Ambient Temperature [C] 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.5V.5: Efficiency vs. load current and input voltage for SQ24T/S15015 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.5V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15015 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com SQ24T/S15015 (1.5 VOUT) 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 40 4.00 3.00 2.00 36 V 24 V 18 V 1.00 4.00 3.00 2.00 70 C 55 C 40 C 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 Load Current [Adc] 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.5V.7: Power dissipation vs. load current and input voltage for SQ24T/S15015 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 1.5V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15015 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 1.5V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.5V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.5V.11: Output voltage response to load current step-change (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 1.5V.12: Output voltage response to load current step-change (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com 41 SQ24T/S15015 (1.5 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 1.5V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 1.5V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 1.5V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 1.5V.14 for test setup. Time scale: 1 s/div. Fig. 1.5V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 1.5V.14 for test setup. Time scale: 1s/div. 2.0 Vout [Vdc] 1.5 1.0 0.5 0 0 5 10 15 Iout [Adc] Fig. 1.5V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. 20 Fig. 1.5V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 42 SQ24T/S15012 (1.2 VOUT) 14. ELECTRICAL SPECIFICATIONS: SQ24T/S15012 (1.2 VOLTS OUT) Conditions: TA = 25C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 1.2 VDC unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS Input Characteristics Maximum Input Current 15 ADC, 1.2 VDC Out @ 18 VDC In 1.25 ADC Input Stand-by Current Vin = 24 V, converter disabled 2.6 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 43 mADC Input Reflected-Ripple Current 25 MHz bandwidth 6 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Output Characteristics Output Voltage Set Point (no load) 1.188 1.200 1.212 VDC Over Line 1 3 mV Over Load 1 3 mV 1.218 VDC 50 mVPK-PK 15,000 F 15 ADC Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 1.182 30 0 Current Limit Inception Non-latching 18 20 ADC Peak Short-Circuit Current Non-latching. Short=10 m. 30 40 A RMS Short-Circuit Current Non-latching 5.3 Arms Dynamic Response Co = 1 F ceramic 90 mV Co = 450 F tant. + 1 F ceramic 120 mV 200 s 100% Load 81 % 50% Load 81 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 43 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15012 (1.2 VOUT) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 20 20 15 15 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 0 70 80 90 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Fig. 1.2V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15012 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Fig. 1.2V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15012 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency 60 Fig. 1.2V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15012 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Load Current [Adc] Load Current [Adc] Fig. 1.2V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15012 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 5 50 Ambient Temperature [C] 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.2V.5: Efficiency vs. load current and input voltage for SQ24T/S15012 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.2V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15012 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com SQ24T/S15012 (1.2 VOUT) 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 44 4.00 3.00 2.00 36 V 24 V 18 V 1.00 4.00 3.00 2.00 70 C 55 C 40 C 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 Load Current [Adc] 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.2V.7: Power dissipation vs. load current and input voltage for SQ24T/S15012 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 1.2V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15012 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 1.2V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.2V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.2V.11: Output voltage response to load current step-change (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 1.2V.12: Output voltage response to load current step-change (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com 45 SQ24T/S15012 (1.2 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 1.2V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 1.2V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 1.2V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 1.2V.14 for test setup. Time scale: 1 s/div. Fig. 1.2V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 1.2V.14 for test setup. Time scale: 1s/div. 1.5 Vout [Vdc] 1.0 0.5 0 0 5 10 15 Iout [Adc] Fig. 1.2V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. 20 Fig. 1.2V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 46 SQ24T/S15010 (1.0 VOUT) 15. ELECTRICAL SPECIFICATIONS: SQ24T/S15010 (1.0 VOLT OUT) Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 24 VDC, Vout = 1.0 VDC unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS 1.1 ADC Input Characteristics Maximum Input Current 15 ADC, 1.0 VDC Out @ 18 VDC In Input Stand-by Current Vin = 24 V, converter disabled 2.6 mADC Input No Load Current (0 load on the output) Vin = 24 V, converter enabled 43 mADC Input Reflected-Ripple Current 25 MHz bandwidth 7.5 mAPK-PK Input Voltage Ripple Rejection 120 Hz TBD dB Output Characteristics Output Voltage Set Point (no load) 0.990 1.000 1.010 VDC Over Line 1 2 mV Over Load 1 3 mV 1.015 VDC 50 mVPK-PK 15,000 F 15 ADC Output Regulation Output Voltage Range Over line, load and temperature (-40C to 85C ) Output Ripple and Noise - 25 MHz bandwidth Full load + 10 F tantalum + 1 F ceramic External Load Capacitance Plus full load (resistive) Output Current Range 0.985 30 0 Current Limit Inception Non-latching 18 20 ADC Peak Short-Circuit Current Non-latching. Short = 10 m. 30 40 A RMS Short-Circuit Current Non-latching 5.3 Arms Dynamic Response Co = 1 F ceramic 80 mV Co = 450 F tant. + 1 F ceramic 140 mV 180 s 100% Load 79 % 50% Load 79 % Load Change 25% of Iout Max, di/dt = 0.1 A/s di/dt = 5 A/s Setting Time to 1% Efficiency tech.support@psbel.com 47 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15010 (1.0 VOUT) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 20 20 15 15 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 0 70 80 90 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 40 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Fig. 1.0V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15010 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Fig. 1.0V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15010 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency 60 Fig. 1.0V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15010 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. Load Current [Adc] Load Current [Adc] Fig. 1.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15010 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 5 50 Ambient Temperature [C] 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.0V.5: Efficiency vs. load current and input voltage for SQ24T/S15010 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.0V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15010 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com SQ24T/S15010 (1.0 VOUT) 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 48 4.00 3.00 2.00 36 V 24 V 18 V 1.00 4.00 3.00 2.00 70 C 55 C 40 C 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 Load Current [Adc] 0 2 4 6 8 10 12 14 16 Load Current [Adc] Fig. 1.0V.7: Power dissipation vs. load current and input voltage for SQ24T/S15010 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 1.0V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15010 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). Fig. 1.0V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.0V.10: Turn-on transient at full rated load current (resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.0V.10: Turn-on transient at full rated load current (resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.0V.12: Output voltage response to load current step-change (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. tech.support@psbel.com 49 SQ24T/S15010 (1.0 VOUT) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 1.0V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24 V. Time scale: 1 s/div. Fig. 1.0V.14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 1.0V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 1.0V.14 for test setup. Time scale: 1 s/div. Fig. 1.0V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 1.0V.14 for test setup. Time scale: 1s/div. 1.5 Vout [Vdc] 1.0 0.5 0 0 5 10 15 Iout [Adc] Fig. 1.0V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. 20 Fig. 1.0V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. tech.support@psbel.com 50 16. MECHANICAL SPECIFICATIONS SQ24S Platform Notes All dimensions are in inches [mm] Connector Material: Copper Connector Finish: Gold over Nickel Optional: Tin/Lead over Nickel Converter Weight: 0.53 oz [15 g] Recommended Surface-Mount Pads: o Min. 0.080" X 0.112" [2.03 x 2.84] o Max. 0.092" X 0.124" [2.34 x 3.15] PAD / PIN CONNECTIONS Pad/Pin # Function 1 Vin (+) 2 ON/OFF 3 Vin (-) 4 Vout (-) 5 SENSE(-) 6 TRIM 7 SENSE(+) 8 Vout (+) SQ24S Pinout (Surface Mount) Height Option A B C D E HT (Max. Height) +0.000 [+0.00] 0.038 [- 0.97] 0.319 [8.10] 0.352 [8.94] 0.516 [13.11] 0.416 [10.57] 0.298 [7.57] Pin Option A B C CL (Min. Clearance) +0.016 [+0.41] 0.000 [- 0.00] 0.030 [0.77] 0.063 [1.60] 0.227 [5.77] 0.127 [3.23] 0.009 [0.23] PL Pin Length 0.005 [0.13] 0.188 [4.77] 0.145 [3.68] 0.110 [2.79] SQ24T Platform Notes SQ24T Pinout (Through-hole) Pins 1-3 and 5-7 are O 0.040" [1.02] with O Pins 4 and 8 are O 0.062" [1.57] without shoulder Pin Material and Finish: CDA 360 (brass) with 200-300 u" matte SN over 100-150 u" N Converter Weight: 0.53 oz [15 g] tech.support@psbel.com 51 17. CONVERTER PART NUMBERING / ORDERING INFORMATION Product Series Input Voltage Mounting Scheme Rated Load Current Output Voltage SQ 24 S 05 080 15 15 A (1.0 - 3.3 V) 010 1.0 V 012 1.2 V 015 1.5 V 018 1.8 V 020 2.0 V 025 2.5 V 033 3.3 V 050 5.0 V 060 6.0 V 080 8.0 V 120 12.0 V 10 10 A (5.0 V) 1/8th Brick Format 18-36 V S Surface Mount 08 8 A (6.0 V) 05 5.3 A (8.0 V) ON/OFF Logic - N N Negative P Positive Maximum Height [HT] S SMT S 0.289" Pin Length [PL] 0 Input Voltage 24 Mounting Scheme T Rated Load Current 05 Output Voltage 080 15 15 A (1.0 - 3.3 V) 010 1.0 V 012 1.2 V 015 1.5 V 018 1.8 V 020 2.0 V 025 2.5 V 033 3.3 V 050 5.0 V 060 6.0 V 080 8.0 V 120 12.0 V 10 10 A (5.0 V) 1/8th Brick Format 18-36 V T Throughhole 08 8 A (6.0 V) 05 5.3 A (8.0 V) - ON/OFF Logic N S Optional Connector Finish: Tin/Lead over Nickel No Suffix RoHS lead-solderexemption compliant 0 STD G RoHS compliant for all six substances T Special Trim2 (For 1.2V & 1.0V only) Maximum Height [HT] B Pin Length [PL] A Special Features 0 0 STD N Negative P Positive Through hole A 0.319" B 0.352" C 0.516" D 0.416" E 0.298" Through hole A 0.188" B 0.145" C 0.110" RoHS 0 SMT 0 0.00" 04 4 A (12.0 V) Product Series3 SQ Special Features T Special Trim2 (For 1.2V & 1.0V only) RoHS No Suffix RoHS lead-solderexemption compliant G RoHS compliant for all six substances 04 4 A (12.0 V) 1 2 3 The example above describes P/N SQ24T05080-NBA0: 18-36 V input, through-hole mounting, 5.3 A @ 8.0 V output, negative ON/OFF logic, a maximum height of 0.352", a through the board pin length of 0.188", and RoHS lead-solder-exemption compliancy. Please consult factory regarding availability of a specific version. For definitions, operation, and associated trim equations for all trim options please refer to Application Note 103, Trim Feature for Isolated DC-DC converters. All possible option combinations are not necessarily available for every model. Contact Customer Service to confirm availability. Model numbers highlighted in yellow or shaded are not recommended for new designs. NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. tech.support@psbel.com