GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc - 14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Features RoHS Compliant Compliant to RoHS EU Directive 2011/65/EU (-Z versions) Compliant to RoHS EU Directive 2011/65/EU under exemption 7b (Lead solder exemption). Exemption 7b will expire after June 1, 2016 at which time this product will no longer be RoHS compliant (non-Z versions) Delivers up to 3A output current High efficiency - 91% at 3.3V full load (VIN = 12.0V) Small size and low profile: 20.3 mm x 11.4 mm x 7.27 mm (0.80 in x 0.45 in x 0.286 in) Applications Low output ripple and noise Constant switching frequency (300 kHz) Output voltage programmable from 0.75 Vdc to 5.5 Vdc via external resistor Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Line Regulation: 0.3% (typical) Servers and storage applications Load Regulation: 0.4% (typical) Networking equipment Temperature Regulation: 0.4 % (typical) Enterprise Networks Remote On/Off Latest generation IC's (DSP, FPGA, ASIC) and Microprocessor powered applications Output overcurrent protection (non-latching) Wide operating temperature range (-40C to 85C) UL* 60950-1Recognized, CSA C22.2 No. 60950-103 Certified, and VDE 0805:2001-12 (EN60950-1) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities Description Austin MiniLynxTM 12V SMT (surface mount technology) power modules are non-isolated dc-dc converters that can deliver up to 3A of output current with full load efficiency of 91% at 3.3V output. These modules provide precisely regulated output voltage programmable via external resistor from 0.75Vdc to 5.5Vdc over a wide range of input voltage (VIN = 8.3 14V). Their open-frame construction and small footprint enable designers to develop cost- and space-efficient solutions. In addition to sequencing, standard features include remote On/Off, programmable output voltage and over current protection. * UL is a registered trademark of Underwriters Laboratories, Inc. CSA is a registered trademark of Canadian Standards Association. VDE is a trademark of Verband Deutscher Elektrotechniker e.V. ** ISO is a registered trademark of the International Organization of Standards September 25, 2015 (c)2015 General Electric Company. All rights reserved. GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. Parameter Input Voltage Device Symbol Min Max Unit All VIN -0.3 15 Vdc All TA -40 85 C All Tstg -55 125 C Continuous Operating Ambient Temperature (see Thermal Considerations section) Storage Temperature Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Device Symbol Min Typ Vo,set 3.63 VIN 8.3 Vo,set > 3.63 VIN 8.3 All IIN,max VO,set = 0.75Vdc IIN,No load 45 mA VO,set = 5.5Vdc IIN,No load 150 mA All IIN,stand-by 1.2 mA Inrush Transient All I2t Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1H source impedance; VIN, min to VIN, max, IO= IOmax ; See Test configuration section) All 30 Input Ripple Rejection (120Hz) All 30 Operating Input Voltage Maximum Input Current Max Unit 12 14 Vdc 12 13.2 Vdc 2.2 Adc (VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc) Input No Load Current (VIN = VIN, nom Vdc, IO = 0, module enabled) Input Stand-by Current (VIN = 5.5Vdc, module disabled) 0.4 A2s mAp-p dB CAUTION: This power module is not internally fused. An input line fuse must always be used. This power module can be used in a wide variety of applications, ranging from simple standalone operation to being part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating of 6 A (see Safety Considerations section). Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer's data sheet for further information. September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 2 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Electrical Specifications (continued) Parameter Output Voltage Set-point Device Symbol Min Typ Max Unit All VO, set -2.5 VO, set +2.5 % VO, set All VO, set -3% +4% % VO, set All VO 0.7525 5.5 Vdc (VIN=IN, min, IO=IO, max, TA=25C) Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) Adjustment Range Selected by an external resistor Output Regulation Line (VIN=VIN, min to VIN, max) All 0.3 % VO, set Load (IO=IO, min to IO, max) All 0.4 % VO, set Temperature (Tref=TA, min to TA, max) All 0.4 % VO, set RMS (5Hz to 20MHz bandwidth) All 10 15 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All 30 50 mVpk-pk 1000 F 3000 F Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Cout = 1F ceramic//10Ftantalum capacitors) External Capacitance ESR 1 m All CO, max ESR 10 m All CO, max Output Current All Io 0 Output Current Limit Inception (Hiccup Mode ) All IO, lim All IO, s/c VO,set = 1.2Vdc 3 Adc 200 % Io 2 Adc (VO= 90% of VO, set) Output Short-Circuit Current (VO250mV) ( Hiccup Mode ) Efficiency 81.5 % VIN= VIN, nom, TA=25C VO, set = 1.5Vdc 84.0 % IO=IO, max , VO= VO,set VO,set = 1.8Vdc 86.0 % VO,set = 2.5Vdc 89.0 % VO,set = 3.3Vdc 91.0 % VO,set = 5.0Vdc 93.0 % All fsw 300 kHz All Vpk 200 mV Settling Time (Vo<10% peak deviation) All ts 25 s (dIo/dt=2.5A/s; VIN = VIN, nom; TA=25C) Load Change from Io= 100% to 50%of Io,max: 1F ceramic// 10 F tantalum All Vpk 200 mV All ts 25 s Switching Frequency Dynamic Load Response (dIo/dt=2.5A/s; VIN = VIN, nom; TA=25C) Load Change from Io= 50% to 100% of Io,max; 1F ceramic// 10 F tantalum Peak Deviation Peak Deviation Settling Time (Vo<10% peak deviation) September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 3 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit All Vpk 75 mV Dynamic Load Response (dIo/dt=2.5A/s; V VIN = VIN, nom; TA=25C) Load Change from Io= 50% to 100% of Io,max; Co = 2x150 F polymer capacitors Peak Deviation Settling Time (Vo<10% peak deviation) All ts 100 s (dIo/dt=2.5A/s; VIN = VIN, nom; TA=25C) Load Change from Io= 100% to 50%of Io,max: Co = 2x150 F polymer capacitors Peak Deviation All Vpk 75 mV Settling Time (Vo<10% peak deviation) All ts 100 s General Specifications Parameter Min Calculated MTBF (VIN= VIN, nom, IO= 0.8IO, max, TA=40C) Telecordia SR 332 Issue 1: Method 1, case 3 Weight September 25, 2015 Typ Max 10,865,800 2.8 (0.1) (c)2015 General Electric Company. All rights reserved. Unit Hours g (oz.) Page 4 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Device Symbol Input High Voltage (Module ON) All VIH Input High Current All IIH Input Low Voltage (Module OFF) All VIL Input Low Current All Input High Voltage (Module OFF) Input High Current Min Typ Max Unit VIN, max V 10 A -0.2 0.3 V IIL 0.2 1 mA All VIH 2.5 All IIH Input Low Voltage (Module ON) All VIL Input low Current All IIL Case 1: On/Off input is set to Logic Low (Module ON) and then input power is applied (delay from instant at which VIN =VIN, min until Vo=10% of Vo,set) Case 2: Input power is applied for at least one second and then the On/Off input is set to logic Low (delay from instant at which Von/Off=0.3V until Vo=10% of Vo, set) All Tdelay All Output voltage Rise time (time for Vo to rise from 10% of Vo,set to 90% of Vo, set) All On/Off Signal interface Device code with Suffix "4" - Positive logic (On/Off is open collector/drain logic input; Signal referenced to GND - See feature description section) Device Code with no suffix - Negative Logic (On/OFF pin is open collector/drain logic input with external pull-up resistor; signal referenced to GND) -0.2 VIN,max Vdc 0.2 1 mA 0.3 Vdc 10 A 3 msec Tdelay 3 msec Trise 4 6 msec 1 % VO, set 140 C Turn-On Delay and Rise Times (IO=IO, max , VIN = VIN, nom, TA = 25 oC, ) Output voltage overshoot - Startup IO= IO, max; VIN = 8.3 to 14Vdc, TA = 25 C o Overtemperature Protection All Tref (See Thermal Consideration section) Input Undervoltage Lockout Turn-on Threshold All 7.9 V Turn-off Threshold All 7.8 V September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 5 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Characteristic Curves 88 92 86 90 84 88 82 86 EFFICIENCY, (%) EFFICIENCY, (%) The following figures provide typical characteristics for the Austin MiniLynxTM 12 V SMT modules at 25C. 80 78 76 VIN = 8.3V 74 VIN = 12.0V 72 1.2 1.8 2.4 VIN = 8.3V 78 VIN =12.0V 76 74 70 0.6 80 VIN = 14.0V VIN =14.0V 0 84 82 0 3 0.6 OUTPUT CURRENT, IO (A) 1.8 3 Figure 4. Converter Efficiency versus Output Current (Vout = 2.5Vdc). 88 95 86 92 84 89 EFFICIENCY, (%) 82 80 78 76 VIN = 8.3V 74 VIN = 12.0V 72 86 83 80 VIN = 8.3V 77 VIN = 12.0V 74 VIN = 14.0V VIN = 14.0V 70 71 0 0.6 1.2 1.8 2.4 3 0 0.6 OUTPUT CURRENT, IO (A) 96 86 93 84 90 82 80 78 VIN = 8.3V VIN = 12.0V VIN = 14.0V 72 0 0.6 1.2 1.8 2.4 3 OUTPUT CURRENT, IO (A) Figure 3. Converter Efficiency versus Output Current (Vout = 1.8Vdc). September 25, 2015 EFFICIENCY, (%) 99 88 74 1.8 2.4 3 Figure 5. Converter Efficiency versus Output Current (Vout = 3.3Vdc). 90 76 1.2 OUTPUT CURRENT, IO (A) Figure 2. Converter Efficiency versus Output Current (Vout = 1.5Vdc). EFFICIENCY, (%) 2.4 OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current (Vout = 1.2Vdc). EFFICIENCY, (%) 1.2 87 84 81 VIN = 8.3V 78 VIN = 12.0V 75 VIN =14.0V 72 0 0.6 1.2 1.8 2.4 3 OUTPUT CURRENT, IO (A) Figure 6. Converter Efficiency versus Output Current (Vout = 5.0Vdc). (c)2015 General Electric Company. All rights reserved. Page 6 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Characteristic Curves (continued) The following figures provide typical characteristics for the Austin MiniLynxTM 12V SMT modules at 25C. 1.6 Io=3A 0.2 0 7 8 9 10 11 12 INPUT VOLTAGE, VIN (V) Figure 7. Input voltage vs. Input Current TIME, t (1s/div) TIME, t (1s/div) Figure 9. Typical Output Ripple and Noise (VIN = 12.0V dc, Vo = 3.3Vdc, Io=3A). VO (V) (200mV/div) TIME, t (5 s/div) Figure 10. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3Vdc). TIME, t (5 s/div) Figure 11. Transient Response to Dynamic Load Change from 100% to 50% of full load (Vo = 3.3 Vdc). OUTPUT CURRENT, OUTPUT VOLTAGE VO (V) (10mV/div) OUTPUT VOLTAGE Figure 8. Typical Output Ripple and Noise (VIN = 12.0V dc, Vo = 0.75Vdc, Io=3A). September 25, 2015 14 OUTPUT CURRENT, OUTPUT VOLTAGE VO (V) (10mV/div) OUTPUT VOLTAGE (Vout =3.3Vdc). 13 IO (A) (1A/div) 0.4 OUTPUT CURRENT, OUTPUT VOLTAGE 0.6 VO (V) (200mV/div) 0.8 IO (A) (1A/div) Io=0A 1 VO (V) (50mV/div) Io=1.5A 1.2 IO (A) (2A/div) INPUT CURRENT, IIN (A) 1.4 TIME, t (50s/div) Figure 12. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3 Vdc, Cext = 2x150 F Polymer Capacitors). (c)2015 General Electric Company. All rights reserved. Page 7 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Characteristic Curves (continued) OUTPUT VOLTAGE VO (V) (1V/div) VIN (V) (10V/div) INPUT VOLTAGE TIME, t (2ms/div) TIME, t (10ms/div) Figure 15. Typical Start-Up Using Remote On/Off with Low- ESR external capacitors (7x150uF Polymer) (VIN = 12.0Vdc, Vo = 3.3Vdc, Io = 3A, Co = 1050F). September 25, 2015 TIME, t (2ms/div) Figure 17 Typical Start-Up Using Remote On/Off with Prebias (VIN = 12.0Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias =1.0Vdc). OUTPUT CURRENT, VO (V) (1V/div) VOn/off(V) (10V/div) ON/OFF VOLTAGE OUTPUT VOLTAGE Figure 14. Typical Start-Up Using Remote On/Off (VIN = 12.0Vdc, Vo = 3.3Vdc, Io = 3A). VO (V) (0.5V/div) OUTPUT VOLTAGE VO (V) (1V/div) VOn/off(V) (10V/div) ON/OFF VOLTAGE OUTPUT VOLTAGE ON/OFF VOLTAGE TIME, t (2ms/div) TIME, t (2ms/div) Figure 16. Typical Start-Up with application of Vin (VIN = 12.0Vdc, Vo = 3.3Vdc, Io = 3A). VOn/off(V) (10V/div) TIME, t (100s/div) Figure 13. Transient Response to Dynamic Load Change from 100% of 50% full load (Vo = 3.3Vdc, Cext = 2x150 F Polymer Capacitors). IO (A) (5A/div) OUTPUT CURRENT, OUTPUTVOLTAGE VO (V) (50mV/div) IO (A) (1A/div) The following figures provide typical characteristics for the Austin MiniLynxTM 12 V SMT modules at 25C. Figure 18. Output short circuit Current (VIN = 12.0Vdc, Vo = 0.75Vdc). (c)2015 General Electric Company. All rights reserved. Page 8 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Characteristic Curves (continued) 3.5 3.5 3 3.0 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) The following figures provide thermal derating curves for the Austin MiniLynxTM 12 V SMT modules. 2.5 2 1.5 1 100 LFM 0.5 0 LFM 0 2.5 2.0 1.5 1.0 100 LFM 0.5 0 LFM 0.0 20 30 40 50 60 70 AMBIENT TEMPERATURE, T AO 80 90 C 20 30 40 50 60 70 AMBIENT TEMPERATURE, T Figure 19. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = 12.0 Vdc, Vo=0.75Vdc). AO 80 90 C Figure 22. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = 12 Vdc, Vo=5.0 Vdc). 3.5 OUTPUT CURRENT, Io (A) 3.0 2.5 2.0 1.5 1.0 100 LFM 0.5 0 LFM 0.0 20 30 40 50 60 70 80 90 AMBIENT TEMPERATURE, TA OC Figure 20. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = 12.0Vdc, Vo=1.8 Vdc). 3.5 OUTPUT CURRENT, Io (A) 3.0 2.5 2.0 1.5 1.0 100 LFM 0.5 0 LFM 0.0 20 30 40 50 60 70 80 90 AMBIENT TEMPERATURE, TA OC Figure 21. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = 12.0Vdc, Vo=3.3 Vdc). Test Configurations September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 9 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current CURRENT PROBE TO OSCILLOSCOPE LTEST BATTERY Input Filtering VIN(+) 1H CIN CS 1000F Electrolytic 2x100F Tantalum E.S.R.<0.1 @ 20C 100kHz COM NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1H. Capacitor CS offsets possible battery impedance. Measure current as shown above. Figure 23. Input Reflected Ripple Current Test Setup. COPPER STRIP VO (+) RESISTIVE LOAD 1uF . 10uF Design Considerations The Austin MiniLynxTM 12V SMT module should be connected to a low-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability in the presence of inductive traces that supply input voltage to the module. In a typical application, a 22 F low-ESR ceramic capacitors will be sufficient to provide adequate ripple voltage at the input of the module. To further minimize ripple voltage at the input, additional ceramic capacitors are recommended at the input of the module. Figure 26 shows input ripple voltage (mVp-p) for various outputs with 10F and with a 22F ceramic capacitor at full load. 350 SCOPE 1 x 10uF 300 1 x 22uF COM 250 200 GROUND PLANE NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. 150 100 Figure 24. Output Ripple and Noise Test Setup. 50 0 0.5 Rdistribution Rcontact Rcontact VIN(+) Rdistribution Rcontact 2 2.5 3 3.5 4 4.5 5 5.5 RLOAD Rcontact COM 1.5 Figure 26. Input ripple voltage for various outputs with a 10 F or a 22 F ceramic capacitor at the input (full-load). VO VIN 1 Rdistribution VO Rdistribution COM NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. Figure 25. Output Voltage and Efficiency Test Setup. VO. IO Efficiency = September 25, 2015 VIN. IIN x 100 % (c)2015 General Electric Company. All rights reserved. Page 10 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Design Considerations (continued) Safety Considerations Output Filtering For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:200112 (EN60950-1) Licensed. The Austin MiniLynxTM 12 V SMT module is designed for low output ripple voltage and will meet the maximum output ripple specification with 1 F ceramic and 10 F tantalum capacitors at the output of the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. September 25, 2015 For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a fast-acting fuse with a maximum rating of 6A in the positive input lead. (c)2015 General Electric Company. All rights reserved. Page 11 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Feature Description VIN+ Remote On/Off MODULE Rpull-up Austin MiniLynxTM 12V SMT power modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available in the Austin MiniLynxTM 12V series modules. Positive Logic On/Off signal, device code suffix "4", turns the module ON during a logic High on the On/Off pin and turns the module OFF during a logic Low. Negative logic On/Off signal, no device code suffix, turns the module OFF during logic High and turns the module ON during logic Low. For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 27. The On/Off pin is an open collector/drain logic input signal (Von/Off) that is referenced to ground. During a logic-high (On/Off pin is pulled high internal to the module) when the transistor Q1 is in the Off state, the power module is ON. Maximum allowable leakage current of the transistor when Von/off = VIN,max is 10A. Applying a logic-low when the transistor Q1 is turned-On, the power module is OFF. During this state VOn/Off must be less than 0.3V. When not using positive logic On/off pin, leave the pin unconnected or tie to VIN. VIN+ MODULE I ON/OFF ON/OFF + VON/OFF PWM Enable R1 Q2 CSS Q1 R2 GND _ Figure 28. Circuit configuration for using negative logic On/OFF. Overcurrent Protection To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range. The typical average output current during hiccup is 3.5A. R2 Input Undervoltage Lockout ON/OFF I ON/OFF + VON/OFF Q2 R1 PWM Enable R3 Overtemperature Protection Q1 Q3 CSS R4 GND At input voltages below the input undervoltage lockout limit, module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold. _ Figure 27. Circuit configuration for using positive logic On/OFF. To provide over temperature protection in a fault condition, the unit relies upon the thermal protection feature of the controller IC. The unit will shutdown if the thermal reference point Tref2, (see Figure 31) exceeds 140oC (typical), but the thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. The module will automatically restarts after it cools down. For negative logic On/Off devices, the circuit configuration is shown is Figure 28. The On/Off pin is pulled high with an external pull-up resistor (typical Rpull-up = 68k, +/- 5%). When transistor Q1 is in the Off state, logic High is applied to the On/Off pin and the power module is Off. The minimum On/off voltage for logic High on the On/Off pin is 2.5 Vdc. To turn the module ON, logic Low is applied to the On/Off pin by turning ON Q1. When not using the negative logic On/Off, leave the pin unconnected or tie to GND. September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 12 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Feature Descriptions (continued) helps determine the required external trim resistor needed for a specific output voltage. Output Voltage Programming Voltage Margining The output voltage of the Austin MiniLynxTM 12V can be programmed to any voltage from 0.75Vdc to 5.5Vdc by connecting a resistor (shown as Rtrim in Figure 29) between Trim and GND pins of the module. Without an external resistor between Trim and GND pins, the output of the module will be 0.7525Vdc. To calculate the value of the trim resistor, Rtrim for a desired output voltage, use the following equation: 10500 - 1000 Rtrim = - . 7525 0 Vo Output voltage margining can be implemented in the Austin MiniLynxTM modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to the Output pin for margining-down. Figure 30 shows the circuit configuration for output voltage margining. The POL Programming Tool, available at www.gecriticalpower.com under the Design Tools section, also calculates the values of Rmargin-up and Rmargin-down for a specific output voltage and % margin. Please consult your local GE technical representative for additional details. Rtrim is the external resistor in Vo is the desired output voltage Vo For example, to program the output voltage of the Austin MiniLynxTM 12V module to 1.8V, Rtrim is calculated as follows: 10500 - 1000 1.8 - 0.7525 Rmargin-down Austin Lynx or Lynx II Series Rtrim = Q2 Trim Rtrim = 9.024k Rmargin-up V IN(+) Rtrim V O(+) Q1 ON/OFF GND LOAD TRIM R trim GND Figure 30. Circuit Configuration for margining Output voltage. Figure 29. Circuit configuration to program output voltage using an external resistor. Table 1 provides Rtrim values required for some common output voltages. Table 1 VO, set (V) Rtrim (K) 0.7525 Open 1.2 22.46 1.5 13.05 1.8 9.024 2.5 5.009 3.3 3.122 5.0 1.472 Using 1% tolerance trim resistor, set point tolerance of 2% is achieved as specified in the electrical specification. The POL Programming Tool, available at www.gecriticalpower.com under the Design Tools section, September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 13 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Thermal Considerations Power modules operate in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure 32. Note that the airflow is parallel to the long axis of the module as shown in figure 31. The derating data applies to airflow in either direction of the module's long axis. 25.4_ (1.0) Wind Tunnel PWBs Power Mod ule 76.2_ (3.0) x 5.97_ (0.235) Prob e Loc a tion for mea suring a irflow a nd a m b ient tem p era ture Air flow Figure 32. Thermal Test Set-up. Heat Transfer via Convection Figure 31. Tref Temperature measurement location. Increased airflow over the module enhances the heat transfer via convection. Thermal derating curves showing the maximum output current that can be delivered by various module versus local ambient temperature (TA) for natural convection and up to 0.5m/s (100 ft./min) are shown in the Characteristics Curves section. The thermal reference point, Tref used in the specifications is shown in Figure 32. For reliable operation this temperature should not exceed 115oC. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). Please refer to the Application Note "Thermal Characterization Process For Open-Frame Board-Mounted Power Modules" for a detailed discussion of thermal aspects including maximum device temperatures. September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 14 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Mechanical Outline Dimensions are in millimeters and (inches). Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.) Bottom View Co-planarity (max): 0.102 [0.004] Side View PIN FUNCTION 1 On/Off 2 VIN 3 GND 4 Trim 5 VOUT September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 15 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Recommended Pad Layout Dimensions are in millimeters and (inches). Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.) PIN FUNCTION 1 On/Off 2 VIN 3 GND 4 Trim 5 VOUT September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 16 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Packaging Details The Austin MiniLynxTM 12 V SMT version is supplied in tape & reel as standard. Modules are shipped in quantities of 400 modules per reel. All Dimensions are in millimeters and (in inches). Reel Dimensions Outside diameter: Inside diameter: Tape Width: September 25, 2015 330.2 mm (13.00) 177.8 mm (7.00") 44.0 mm (1.73") (c)2015 General Electric Company. All rights reserved. Page 17 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Surface Mount Information The Austin MiniLynxTM 12 V SMT modules use an open frame construction and are designed for a fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and placing. The label meets all the requirements for surface mount processing, as well as safety standards and is able to withstand maximum reflow temperature. The label also carries product information such as product code, serial number and location of manufacture. soldering the solder reflow profile should be established by accurately measuring the modules CP connector temperatures. REFLOW TEMP (C) Pick and Place REFLOW TIME (S) Figure 34. Reflow Profile for Tin/Lead (Sn/Pb) process. Nozzle Recommendations The module weight has been kept to a minimum by using open frame construction. Even so, these modules have a relatively large mass when compared to conventional SMT components. Variables such as nozzle size, tip style, vacuum pressure and pick & placement speed should be considered to optimize this process. The minimum recommended nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 8 mm max. MAX TEMP SOLDER (C) Figure 33. Pick and Place Location. Figure 35. Time Limit Curve Above 205oC Reflow for Tin Lead (Sn/Pb) process. Tin Lead Soldering The Austin MiniLynxTM 12V SMT power modules are lead free modules and can be soldered either in a lead-free solder process or in a conventional Tin/Lead (Sn/Pb) process. It is recommended that the customer review data sheets in order to customize the solder reflow profile for each application board assembly. The following instructions must be observed when soldering these units. Failure to observe these instructions may result in the failure of or cause damage to the modules, and can adversely affect long-term reliability. In a conventional Tin/Lead (Sn/Pb) solder process peak reflow temperatures are limited to less than 235oC. Typically, the eutectic solder melts at 183oC, wets the land, and subsequently wicks the device connection. Sufficient time must be allowed to fuse the plating on the connection to ensure a reliable solder joint. There are several types of SMT reflow technologies currently used in the industry. These surface mount power modules can be reliably soldered using natural forced convection, IR (radiant infrared), or a combination of convection/IR. For reliable September 25, 2015 (c)2015 General Electric Company. All rights reserved. Page 18 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Lead Free Soldering The -Z version Austin MiniLynx 12V SMT modules are leadfree (Pb-free) and RoHS compliant and are both forward and backward compatible in a Pb-free and a SnPb soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules and can adversely affect long-term reliability. Pb-free Reflow Profile Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Figure. 36. MSL Rating The Austin MiniLynx 12V SMT modules have a MSL rating of 2a. packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of <= 30C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40 C, < 90% relative humidity. Post Solder Cleaning and Drying Considerations Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning Application Note (AN04-001). 300 Per J-STD-020 Rev. C Peak Temp 260C 250 Reflow Temp (C) Surface Mount Information (continued) 200 * Min. Time Above 235C 15 Seconds 150 Heating Zone 1C/Second Cooling Zone *Time Above 217C 60 Seconds 100 50 Storage and Handling The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed September 25, 2015 0 Reflow Time (Seconds) Figure 36. Recommended linear reflow profile using Sn/Ag/Cu solder. (c)2015 General Electric Company. All rights reserved. Page 19 GE Data Sheet 12V Austin MiniLynxTM: SMT Non-Isolated DC-DC Power Modules 8.3Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 3A Output Current Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. Table 3. Device Codes Device Code Input Voltage Output Voltage Output Current Efficiency 3.3V@ 3A On/Off Logic Connector Type Comcodes AXA003A0X-SR 8.3 - 14Vdc 0.75 - 5.5Vdc 3A 89.0 % Negative SMT 108991213 AXA003A0X4-SR 8.3 - 14Vdc 0.75 - 5.5Vdc 3A 89.0 % Positive SMT 108991221 AXA003A0X-SRZ 8.3 - 14Vdc 0.75 - 5.5Vdc 3A 89.0 % Negative SMT CC109101276 AXA003A0X4-SRZ 8.3 - 14Vdc 0.75 - 5.5Vdc 3A 89.0 % Positive SMT CC109102266 -Z refers to RoHS compliant Versions Contact Us For more information, call us at USA/Canada: +1 877 546 3243, or +1 972 244 9288 Asia-Pacific: +86.021.54279977*808 Europe, Middle-East and Africa: +49.89.878067-280 www.gecriticalpower.com GE Critical Power reserves the right to make changes to the product(s) or information contained herein without notice, and no liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. September 25, 2015 (c)2015 General Electric Company. All International rights reserved. Version 1.4