DATA SHEET UIQ48T48050 DC-DC CONVERTER 18-75VDC Input; 5VDC, 48A, 240W Output FEATURES Industry-standard quarter-brick pin-out Ultra wide input voltage range Delivers 240W at 92% efficiency APPLICATIONS Paste In Hole (PIH) compatible Withstands 100V input transient for 100ms Fixed-frequency operation o o o o Intermediate Bus Architectures Data communications/processing LAN/WAN Servers, storage, instrumentation, embedded equipment On-board input differential LC-filter Start-up into pre-biased load No minimum load required Minimum of 2,250VDC I/O isolation Fully protected (OTP, OCP, OVP, UVLO) BENEFITS Positive or negative logic ON/OFF option Low height of 0.44" (11.18mm) Weight: 48g w/o baseplate / heat spreader, 62g w/ baseplate / heat spreader * High efficiency - no heat sink required1 * Industry-standard quarter-brick footprint * PIH Compatibility on both the open frame and baseplate models simplifying the manufacturing process by eliminating the need for wave soldering High reliability: MTBF = 14.3 million hours, calculated per Telcordia SR-332, Method I Case 1 Approved to the following Safety Standards: UL/CSA60950-1, EN 2nd Ed 60950-1 2nd Ed, and IEC60950-1 2nd Ed Designed to meet Class B conducted emissions per FCC and EN55022 when used with external filter All materials meet UL94, V-0 flammability rating DESCRIPTION The high performance 48A UIQ48T48050 DC-DC converter provides a high efficiency single output, in a 1/4 brick package. Specifically designed for operation in systems that have limited airflow and increased ambient temperatures, the UIQ48T48050 converter utilizes the same pinout and Input/Output functionality of the industry-standard Quarter bricks. In addition, a baseplate / heat spreader feature is available (-xDxBx suffix) that provides an effective thermal interface for coldplate and heat sinking options. The UIQ48T48050 converter thermal performance is accomplished through the use advanced circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management, and a low-body profile. Operating from a wide-range 18-75V input, the UIQ48T48050 converter utilizes digital control and provides a fully regulated 5.0V output voltage. The designer can expect reliability improvement over other available converters because of the UIQ48T48050's optimized thermal efficiency. 1 Baseplate/Heat Spreader option (suffix `-xDxBx') facilitates heatsink mounting to further enhance the unit's thermal capability. BCD.00352_AA_May-23-2014 1 www.power-one.com DATA SHEET 1 ELECTRICAL SPECIFICATIONS Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin=100 F, unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS -0.3 80 VDC -40 -40 -55 100 85 125 125 VDC C C C Absolute Maximum Ratings Input Voltage Continuous Transient (100ms) Operating Temperature Ambient (TA) 2Component (T ) C (See Derating Curves) Storage Temperature Isolation Characteristics Isolation Voltage Input to Output 2,250 VDC Input to Baseplate 1,500 VDC Output to Baseplate 1,500 VDC Isolation Resistance 10 Isolation Capacitance M 750 pF 250 kHz Feature Characteristics Switching Frequency Output Overvoltage Protection (Non-latching) Over Temperature Shutdown (Non-latching) Auto-Restart Period Turn-On Time from Vin Turn-On Time from ON/OFF Control Turn-On Time from Vin (w/ Co max.) Turn-On Time from ON/OFF Control (w/ Co max.) ON/OFF Control (Positive Logic) ON/OFF Control (Negative Logic) 115 2Component (TC) 120 130 % 130 C 500 ms Applies to all protection features Time from UVLO to Vo=90%VOUT(NOM) Resistive load Time from ON to Vo=90%VOUT(NOM) Resistive load Time from UVLO to Vo=90%VOUT(NOM) Resistive load, CEXT=10,000F load Time from ON to Vo=90%VOUT(NOM) Resistive load, CEXT=10,000F load Converter Off (logic low) -15 0.8 VDC Converter On (logic high) 2.4 20 VDC 100 130 ms 100 130 ms 100 130 ms 100 130 ms Converter Off (logic low) 2.4 20 VDC Converter On (logic high) -15 0.8 VDC Input Characteristics Operating Input Voltage Range 18 48 75 VDC Turn-on Threshold 16.8 17.2 17.8 VDC Turn-off Threshold 14.9 15.5 16.1 VDC Lockout Hysteresis Voltage 0.5 1.7 2.3 VDC Input Undervoltage Lockout Maximum Input Current Po = 240W @ 18VDC In Input Standby Current Vin = 48V, converter disabled Input No Load Current (No load on the output) Vin = 48V, converter enabled Input Reflected-Ripple Current, ic Input Reflected-Ripple Current, iS Input Voltage Ripple Rejection 2 Vin = 48V, 20 MHz bandwidth, Po=240W (Figs. 14,15, 16) 120 Hz ADC 40 3 5 mA 100 2300 850 26 3 45 160 mA mAPK-PK mARMS mAPK-PK mARMS dB Reference Figure G for component TC locations. UIQ48T48050 DC-DC Converter 2 www.power-one.com DATA SHEET 1 ELECTRICAL SPECIFICATIONS (CONTINUED) Conditions: TA = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin=100 F, unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS 4.9 5.0 5.1 VDC +10 % +10 % 48 mV Output Characteristics Output Voltage Setpoint Output Voltage Trim VIN=48V, IOUT=0A, TA=25C Range3 4Industry-std. Remote Sense Compensation4 4Percent equations -20 of VOUT(NOM) Output Regulation Over Line IOUT=48A, TA=25C Over Load 24 VIN=48V, TA=25C Output Voltage Range 15 Over line, load and temperature Output Ripple and Noise - 20 MHz bandwidth IOUT=48A, CEXT =10 F tantalum + 1 F ceramic IOUT=48A (resistive) Admissible External Load Capacitance3 CEXT ESR Output Current Range Current Limit Inception Non-latching RMS Short-Circuit Current 30 mV 5.15 VDC 100 200 mVPK-PK 25 50 6,000 48 mVRMS F m ADC 60 67 ADC 6 10 ARMS 250 mV 4.85 0 1 0 53 Non-latching Short = 10 m Dynamic Response Load Change 50%-75%-50% of IOUT Max CEXT = 10F tantalum + 1F ceramic + 470F (di/dt = 0.1 A/s) E-cap Settling Time to 1% of VOUT 200 s 92 % 92.5 % Efficiency @ 100% Load @ 60% Load 2 48VIN, TA=25C, 300LFM ENVIRONMENT AND MECHANICAL SPECIFICATIONS PARAMETER NOTES MIN TYP MAX UNITS Environmental Operating Humidity Non-condensing 95 % Storage Humidity Non-condensing 95 % Mechanical Weight Without baseplate / heat spreader With baseplate / heat spreader 48 g 62 g Vibration GR-63-CORE, Sect. 5.4.2 1 g Shocks Half Sinewave, 3-axis 50 g Reliability MTBF Telcordia SR-332, Method I Case 1 50% electrical stress, 40C components 14.3 MHrs EMI and Regulatory Compliance Conducted Emissions 3 CISPR 22 B with external EMI filter network For input voltage >22V See "Input Output Impedance", Page 4 4. BCD.00352_AA_May-23-2014 3 www.power-one.com DATA SHEET 3 3.1 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 some applications, the inductance associated with the distribution from the power source to the input of the converter can affect the stability of the converter. A 100 F electrolytic capacitor with adequate ESR based on input impedance is recommended to ensure stability of the converter. In many end applications, a high capacitance value is applied to the converter's output via distributed capacitors. The power converter will exhibit stable operation with external load capacitance up to 6,000 F. 3.2 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 and negative logic, with both referenced to Vin (-). A typical connection is shown in Figure A. The positive logic version turns on when the ON/OFF pin is at a logic high or left open and turns off when it is at a logic low. See the Electrical Specifications for logic high/low definitions. Fig. A: Typ. Circuit configuration for ON/OFF function. Vin (+) UIQ 48 Converter (Top View ) ON / OFF Vin Vout (+) SENSE (+) TRIM Rload SENSE (-) Vin (-) Vout (-) CONTROL INPUT The negative logic version turns on when the ON/OFF pin is at a logic low and turns off when the pin is at logic high. To enable automatic power up of the converter without the need of an external control signal the ON/OFF pin can be hard wired directly to Vin (-) for N and left open for P version. A properly de-bounced mechanical switch, open-collector transistor, or FET can be used to drive the input of the ON/OFF pin. The device must be capable of sinking up to 0.2 mA at a low level voltage of 0.8 V. An external voltage source (15 V maximum) may be connected directly to the ON/OFF input, in which case it must be capable of sourcing or sinking up to 1 mA depending on the signal polarity. If optocoupler is used to control the on/off, then the ON/OFF pin should be tied to a 3V3 rail via 3.3kohm resistor to prevent optocoupler leakage from affecting the on/off function. See the Startup Information section for system timing waveforms associated with use of the ON/OFF pin. 3.3 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). Fig. B: Remote sense circuit configuration. UIQ 48 Converter Vin (+) (Top View ) Rw Vout (+) 100 SENSE (+) Vin ON / OFF TRIM Rload SENSE (-) 10 Vin (-) UIQ48T48050 DC-DC Converter Vout (-) 4 Rw www.power-one.com DATA SHEET CAUTION If remote sensing is not utilized, 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 higher than the specified data sheet value. Because the sense leads carry minimal current, large traces on the end-user board are not required. However, sense traces should be run side by side and located close to a ground plane to minimize system noise and ensure optimum performance. The converter's output overvoltage 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, which is 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. 3.4 OUTPUT VOLTAGE ADJUST /TRIM (PIN 6) The output voltage can be adjusted up 10% or down 20%, relative to the rated output voltage by the addition of an externally connected resistor. 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: R T-INCR = 5.11(100+ )VO-NOM - 626 - 10.22 [k] 1.225 where, RT-INCR = Required value of trim-up resistor k] VO-NOM = Nominal value of output voltage [V] = (VO -REQ - VO -NOM) X 100 VO -NOM [%] VO-REQ = Desired (trimmed) output voltage [V]. When trimming up, care must be taken not to exceed the converter`s maximum allowable output power. See the previous section for a complete discussion of this requirement. Fig. C: Configuration for increasing output voltage. Vin (+) UIQ 48 Converter Vout (+) (Top View ) SENSE (+) Vin ON / OFF TRIM R T- INCR Rload SENSE (-) Vin (-) BCD.00352_AA_May-23-2014 Vout (-) 5 www.power-one.com DATA SHEET 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: RT-DECR = 511 - 10.22 || [k] where, RT-DECR = 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 industrystandard quarter-bricks. Fig. D: Configuration for decreasing output voltage. Vin (+) UIQ 48 Converter (Top View ) Vin ON / OFF Vout (+) SENSE (+) TRIM Rload R T -DECR SENSE (-) Vin (-) Vout (-) 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 overvoltage 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. 4 4.1 PROTECTION FEATURES INPUT UNDERVOLTAGE LOCKOUT (UVLO) Input undervoltage lockout is standard with this converter. The converter will shut down when the input voltage drops below a pre-determined voltage. The input voltage must be typically 17.2V for the converter to turn on. Once the converter has been turned on, it will shut off when the input voltage drops typically below 15.5V. This feature is beneficial in preventing deep discharging of batteries used in telecom applications. 4.2 OUTPUT OVERCURRENT PROTECTION (OCP) The converter is protected against overcurrent or short circuit conditions. Upon sensing an overcurrent condition, the converter will shut down after entering the constant current mode of operation, regardless of the value of the output voltage. Once the converter has shut down, it will enter hiccup mode with attempt to restart every 500 ms until the overload or short circuit conditions are removed. 4.3 OUTPUT OVERVOLTAGE PROTECTION (OVP) The converter will shut down if the output voltage across Vout(+) and Vout(-) exceeds the threshold of the OVP circuitry. Once the converter has shut down, it will attempt to restart every 500 ms until the OVP condition is removed. 4.4 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. The converter will automatically restart after it has cooled to a safe operating temperature. UIQ48T48050 DC-DC Converter 6 www.power-one.com DATA SHEET 4.5 SAFETY REQUIREMENTS The converters are safety approved to UL/CSA60950-1 2nd Ed, EN60950-1 2nd Ed, and IEC60950-1 2nd Ed. Basic Insulation is provided between input and output. The converters have no internal fuse. To comply with safety agencies requirements, an input line fuse must be used external to the converter. The fuse must not be placed in the grounded input line. The UIQ48 converter is UL approved for a fuse rating of 20 Amps. 4.6 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, Power-One 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. An effective internal LC differential filter significantly reduces input reflected ripple current, and improves EMC. With the addition of an external filter, the UIQ48T48050 converter will pass the requirements of Class B conducted emissions per EN55022 and FCC requirements. Refer to Figures 18 - 20 for typical performance with external filter. 4.7 STARTUP INFORMATION (USING NEGATIVE ON/OFF) Scenario #1: Initial Startup From Bulk Supply ON/OFF function enabled, converter started via application of VIN. See Figure E. Time Comments t0 ON/OFF pin is ON; system front-end power is toggled on, VIN to converter begins to rise. t1 VIN crosses undervoltage 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 startup time (t3- t1) is typically 100 ms. Fig. E: Startup scenario #1. V IN ON/OFF STATE OFF ON V OUT t0 t1 t 2 t t3 Scenario #2: Initial Startup Using ON/OFF Pin With VIN previously powered, converter started via ON/OFF pin. See Figure F. Time Comments t0 VIN at nominal value. t1 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 startup time (t3- t1) is typically 100 ms. BCD.00352_AA_May-23-2014 7 www.power-one.com DATA SHEET Fig. F: Startup scenario #2. VIN ON/OFF STATE OFF ON VOUT t0 5 CHARACTERIZATION 5.1 GENERAL INFORMATION t1 t2 t t3 The converter has been characterized for many operational aspects, to include thermal derating (maximum load current as a function of ambient temperature and airflow), efficiency, startup and shutdown parameters, output ripple and noise, transient response to load step-change, overcurrent, and short circuit. The following pages contain specific plots or waveforms associated with the converter. Additional comments for specific data are provided below. 5.2 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, comprised of two-ounce copper, were used to provide traces for connectivity to the converter. The lack of metallization 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 the vertical and horizontal wind tunnel 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. The use of AWG #40 gauge thermocouples is recommended to ensure measurement accuracy. Careful routing of the thermocouple leads will further minimize measurement error. Refer to Figure H for the optimum measuring thermocouple location. 5.3 THERMAL DERATING - AIR COOLED Load current vs. ambient temperature and airflow rates are given in Figures 1 for converter w/o baseplate / heat spreader, and in Figures 5 for converter with baseplate / heat spreader equipped with a .45" finned heat sink. Ambient temperature was varied between 25C and 85C, with airflow rates from 30 to 500LFM (0.15 to 2.5m/s) and with VIN=48V. Load current vs. ambient temperature and airflow rates are given in Figure 3 for a converter w/o baseplate / heat spreader. Ambient temperature was varied between 25C and 85C, with airflow rates from 30 to 500LFM (0.15 to 2.5m/s) and with VIN=24V. Note that the use of baseplate / heat spreader alone without heatsink or attachment to cold plate provides lower power rating than open frame due to the restriction of airflow across the module. UIQ48T48050 DC-DC Converter 8 www.power-one.com DATA SHEET For each set of conditions, the maximum load current was defined as the lowest of: (i) The output current at which any FET junction temperature does not exceed a maximum temperature of 125C as indicated by the thermal measurement, the user should design for TB 105C. (ii) The output current at which the temperature at the thermocouple locations TC1 and TC2 do not exceed 125C (Figure G). (iii) The nominal rating of the converter (48A/240W). Fig. G: Locations of the thermocouples for thermal testing. TC2 TC1 5.4 EFFICIENCY Figure 7 shows the efficiency vs. load current plot for ambient temperature (TA) of 25C and for converter w/o baseplate / heat spreader, air flowing from pin 3 to pin 1 at a rate of 300LFM (1.5m/s) with vertically mounting and input voltages of 18V, 24V, 36V, 48V, 60V and 75V. 5.5 POWER DISSIPATION Figure 8 shows the power dissipation vs. load current plot for ambient temperature (TA) of 25C and for converter w/o baseplate / heat spreader, air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) with vertically mounting and input voltages of 18V, 24V, 36V, 48V, 60V and 75V. 5.6 STARTUP Output voltage waveforms, during the turn-on transient using the ON/OFF pin for full rated load currents (resistive load) are shown with and without external load capacitance in Figure 9 and 10, respectively. 5.7 RIPPLE AND NOISE Figure 13 shows the output voltage ripple waveform, measured at full rated load current with a 10F tantalum and a 1F ceramic capacitor across the output. Note that all output voltage waveforms are measured across the 1F ceramic capacitor. The input reflected-ripple current waveforms are obtained using the test setup shown in Figure 14. The corresponding waveforms are shown in Figure 15 and Figure 16. BCD.00352_AA_May-23-2014 9 www.power-one.com DATA SHEET Fig. 1: Available load current vs. ambient air temperature and airflow rates for UIQ48T48050 converter w/o baseplate mounted vertically with air flowing from pin 3 to pin 1, MOSFET temperature 125C, Vin=48V Fig. 2: Power derating vs. ambient air temperature and airflow rates for UIQ48T48050 converter w/o baseplate mounted vertically with air flowing from pin 3 to pin 1, MOSFET temperature 125C, Vin=48V Fig. 3: Available load current vs. ambient air temperature and airflow rates for UIQ48T48050 converter w/o baseplate mounted vertically with air flowing from pin 3 to pin 1, MOSFET temperature 125C, Vin=24V Fig. 4: Power derating vs. ambient air temperature and airflow rates for UIQ48T48050 converter w/o baseplate mounted vertically with air flowing from pin 3 to pin 1, MOSFET temperature 125C, Vin=24V Fig. 5: Available load current vs. ambient air temperature and airflow rates for UIQ48T48050 converter with baseplate equipped with .45" finned heatsink mounted vertically with air flowing from pin 3 to pin 1, MOSFET temperature 125C, Vin=48V Fig. 6: Power derating vs. ambient air temperature and airflow rates for UIQ48T48050 converter with baseplate equipped with .45" finned heatsink mounted vertically with air flowing from pin 3 to pin 1, MOSFET temperature 125C, Vin=48V UIQ48T48050 DC-DC Converter 10 www.power-one.com DATA SHEET Fig. 7: Efficiency vs. load current and input voltage for UIQ48T48050 converter w/o baseplate 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. 8: Power dissipation vs. load current and input voltage for UIQ48T48050 converter w/o baseplate 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. 9: Turn-on transient at full rated load current (resistive) with Cout 10F tantalum + 1F ceramic atVin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (2 V/div.). Bottom trace: output voltage (2V/div.). Time scale: 50 ms/div. Fig. 10: Turn-on transient at full rated load current (resistive) plus 6000F at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (2V/div.). Bottom trace: output voltage (2V/div.). Time scale: 50 ms/div. Fig. 11: Output voltage response to load current step change (24A - 36A -24A) at Vin = 48 V. Top trace: output voltage(200mV/div.). Bottom trace: load current (20 A/div.). Current slew rate: 0.1 A/s. Co =1F ceramic + 10F tantalum. Time scale: 200s/div. Fig. 12: Output voltage response to load current step change (24 A - 36A -24 A) at Vin = 48V. Top trace: output voltage (500mV/div.). Bottom trace: load current (10A/div.). Current slew rate:1A/s.Co = 1F ceramic + 6000F+10uF tantalum. Time scale: 200s/div. BCD.00352_AA_May-23-2014 11 www.power-one.com DATA SHEET Fig. 13: Output voltage ripple (50 mV/div.) at full rated load current Co = 10 F tantalum + 1 F ceramic and Vin = 48 V. Time scale: 1 s/div. Fig. 14: Test setup for measuring input reflected ripple currents, ic and is. Fig. 15: Input reflected ripple current, ic (1 A/div.), measured at input terminals at full rated load current and Vin = 48 V. Refer to Fig. 14 for test setup. Time scale: 1 s/div. Fig. 16: Input reflected ripple current, is (20 mA/div.), measured through 10 H at the source at full rated load current and Vin =48 V. Refer to Fig. 14 for test setup. Time scale: 1 s/div. Fig. 17: Load current (top trace, 50 A/div.,100 ms/div.) into a10m short circuit during restart, at Vin = 48 V. Bottom trace (50 A/div., 10 ms/div.) is an expansion of the on-time portion of the top trace UIQ48T48050 DC-DC Converter 12 www.power-one.com DATA SHEET Fig. 18: Typical input EMI filter circuit to attenuate conducted emissions. C4 L1 Vin C1 C7 L2 C2 C3 C5 COMP. DES. C1, C2, C3 C6 L1, L2 C4, C5 C7, C8 C6 UUT Rload C8 DESCRIPTION 2uF, 100V ceramic cap 100uF, 100V electrolytic cap 0.59mH, Pulse P0353NL 4700pF, ceramic cap 4700pF, ceramic cap Fig. 19: Vin+ Peak Detector EMI waveform Fig. 20: Vin- Peak Detector EMI waveform BCD.00352_AA_May-23-2014 13 www.power-one.com DATA SHEET 6 PHYSICAL INFORMATION 6.1 UIQ48T PINOUT (THROUGH-HOLE) PAD/PIN CONNECTIONS PAD/PIN # PAD/PIN # VIN (+) 1 ON/OFF 2 VIN (-) 3 VOUT (-) 4 VOUT (-) Sense 5 Trim 6 VOUT (+) Sense 7 VOUT (+) 8 2.3000.020 [58.420.51] 2.000 [50.80] 0.145 [3.68] 0.430 [10.92] 1.4500.020 [36.830.51] 0.600 [15.24] 0.300 [7.62] 2X 0.150 [3.81]x4 TOP VIEW SIDE VIEW NO BASEPLATE/HEAT SPREADER HT(-xDx0x) HEIGHT [HT] CL D PL CUSTOMER PCB SIDE VIEW WITH BASEPLATE/HEAT SPREADER HT(-xDxBx) PL 0.440" [11.18] Max 0.500" +/-0.020 [12.70 +/-0.51] SPECIAL FEATURES 0.028" [0.71] 0 0.028" [0.71] B A PIN LENGTH [PL] 0.005" [0.13] 0.188" [4.78] B 0.145" [3.68] PIN OPTION CL MIN CLEARANCE [CL] CUSTOMER PCB UIQ48T Platform Notes * * * * * All dimensions are in inches [mm] Pins 1,2,3,5,6,7 are O 0.040" [1.02] with O 0.076" [1.93] shoulder Pins 4 and 8 are O 0.062" [1.57] with are O 0.096" [2.44] shoulder Pin Material: Brass Alloy 360 Pin Finish: Tin over Nickel UIQ48T48050 DC-DC Converter 14 www.power-one.com DATA SHEET 6.2 BASEPLATE / HEAT SPREADER INTERFACE INFORMATION 2.300 0.020 [58.42 0.51] DEPTH NOTE: SCREW LENGTH MUST BE SELECTED TO LIMIT HEAT SPREADER PENETRANTION TO 0.08[2.0] MAX. 1.450 0.020[36.83 0.51] 1.03[26.17] M3 x 0.5P 2x SEE DEPTH NOTE PIN 1 INDICATOR 0.210[5.33] .220 [5.59] 6.3 PIN 1 1.860 [47.24] CONVERTER PART NUMBERING/ORDERING INFORMATION PRODUCT INPUT MOUNTING RATED OUTPUT SERIES VOLTAGE SCHEME CURRENT VOLTAGE UIQ Quarter Brick Format 48 18-75 V T T Throughhole 48 48 48 ADC 050 050 5.0V ON/OFF LOGIC MAXIMUM HEIGHT [HT] N D A N Negative D 0.440" for -xDx0x Through hole - P Positive PIN SPECIAL LENGTH FEATURES [PL] A 0.188" 0.520" for -xDxBx B 0.145" B 0 Standard RoHS G B Baseplate option G RoHS compliant for all six substances The example above describes P/N UIQ48T48050-NDABG: 18-75V input, through-hole, 48A@5V output, negative ON/OFF logic, maximum height of 0.52", 0.188" pin length with baseplate / heat spreader option, RoHS compliant for all 6 substances. Consult factory for availability of other options. BCD.00352_AA_May-23-2014 15 www.power-one.com DATA SHEET 7 7.1 SOLDERING INFORMATION THROUGH HOLE SOLDERING Below table lists the temperature and duration for wave soldering 7.2 WAVE SOLDER PROCESS SPECIFICATION PB-FREE: SN/PB EUTECTIC Maximum Preheat Temperature 130C 110C Maximum Pot Temperature 265C 255C Maximum Solder Dwell Time 7 Sec 6 Sec LEAD FREE REFLOW SOLDERING The unit is Paste In Hole (PIH) compatible. The profile below is provided as a guideline for Pb-free reflow only. There are many other factors which will affect the result of reflow soldering. Please check with your process engineer thoroughly. Fig. 21: Lead Free solder reflow profile: For PIH reflow process, the unit has a MSL rating of 3. The unit is packed using a Moisture Barrier Bag (MBB) with humidity Indicator Card (HIC) and drying desiccant included. Using products in Pb-free reflow soldering process required dry pack storage and handling. In case the products have been stored in an uncontrolled environment and no longer can be considered dry, the module must be baked according to IPC/JEDEC J-STD-033. NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective divisional president of Power-One, Inc. 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. UIQ48T48050 DC-DC Converter 16 www.power-one.com