GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Module 10Vdc - 14Vdc input; 0.75Vdc to 5.5Vdc Output; 5A Output Current Features RoHS Compliant Compliant to RoHS EU Directive 2002/95/EC (-Z versions) Compliant to ROHS EU Directive 2002/95/EC with lead solder exemption (non-Z versions) Delivers up to 5A output current High efficiency - 89% at 3.3V full load (VIN = 12.0V) Small size and low profile: 20.3 mm x 11.4 mm x 7.24 mm (0.8 in x 0.45 in x 0.285 in) Low output ripple and noise High Reliability: Calculated MTBF = 5.6M hours at 25oC Full-load Applications Output voltage programmable from 0.75 Vdc to 5.5Vdc via external resistor Intermediate bus voltage applications Line Regulation: 0.3% (typical) Telecommunications equipment Load Regulation: 0.4% (typical) Servers and storage applications Temperature Regulation: 0.4 % (typical) Networking equipment Remote On/Off Enterprise Networks Output overcurrent protection (non-latching) Latest generation IC's (DSP, FPGA, ASIC) and Microprocessor powered applications Wide operating temperature range (-40C to 85C) UL* 60950-1Recognized, CSA C22.2 No. 60950-1-03 Certified, and VDE 0805:2001-12 (EN60950-1) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities Distributed power architectures Description Austin MicroLynxTM 12Vdc SMT (surface mount technology) power modules are non-isolated dc-dc converters that can deliver up to 5A of output current with full load efficiency of 89% 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 = 10 - 14V). Their open-frame construction and small footprint enable designers to develop cost- and space-efficient solutions. Standard features include remote On/Off, programmable output voltage and overcurrent 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 May 6, 2013 (c)2013 General Electric Company. All rights reserved. GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A 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 Device Symbol Min Max Unit All VIN -0.3 15 Vdc All TA -40 85 C All Tstg -55 125 C Input Voltage 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 Max Operating Input Voltage All VIN 10 12 14 Unit Vdc Maximum Input Current All IIN,max 3.5 Adc VO,set = 0.75 Vdc IIN,No load 17 mA VO,set = 5.0Vdc IIN,No load 100 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 (VIN= VIN, min to VIN, max, IO=IO, max ) Input No Load Current (VIN = VIN, nom, Io = 0, module enabled) Input Stand-by Current (VIN = VIN, nom, 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. May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 2 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Electrical Specifications (continued) Parameter Output Voltage Set-point Device Symbol Min Typ Max Unit All VO, set -2.0 VO, set +2.0 % VO, set All VO, set -2.5% +3.5% % 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 15 30 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All 30 75 mVpk-pk 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 1000 ESR 10 m All CO, max 3000 F Output Current All Io 0 5 Adc Output Current Limit Inception (Hiccup Mode ) All IO, lim 200 % Io All IO, s/c 2 Adc VO, set = 1.2Vdc 81.5 % VIN= VIN, nom, TA=25C VO,set = 1.5Vdc 84.0 % IO=IO, max , VO= VO,set VO,set = 1.8Vdc 85.0 % VO,set = 2.5Vdc 87.0 % VO,set = 3.3Vdc 89.0 % VO,set = 5.0Vdc 92.0 All fsw 300 kHz All Vpk 200 mV (VO= 90% of VO, set) Output Short-Circuit Current (VO250mV) ( Hiccup Mode ) Efficiency 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 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 Peak Deviation Settling Time (Vo<10% peak deviation) May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 3 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit All Vpk 50 mV Settling Time (Vo<10% peak deviation) All ts 50 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 50 mV Settling Time (Vo<10% peak deviation) All ts 50 s 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 General Specifications Parameter Min Calculated MTBF (IO=IO, max, TA=25C) Weight May 6, 2013 Typ Max 5,677,000 2.8 (0.1) (c)2013 General Electric Company. All rights reserved. Unit Hours g (oz.) Page 4 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A 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 Min Typ Max Von/Off All Ion/Off All Von/Off All VIH Ion/off All IIH All Tdelay All All Unit VIL -- -- 0.4 V IIL -- -- 10 A -- -- VIN, max V -- -- 1 mA -- 3 -- msec Tdelay -- 3 -- msec Trise -- 4 6 msec -- 1 % VO, set 140 C Remote On/Off Signal interface (VIN=VIN, min to VIN, max; Open collector pnp or equivalent Compatible, Von/off signal referenced to GND See feature description section) Logic Low (On/Off Voltage pin open - Module ON) Logic High (Von/Off > 2.5V - Module Off) Turn-On Delay and Rise Times (IO=IO, max , VIN = VIN, nom, TA = 25 oC, ) 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) Output voltage Rise time (time for Vo to rise from 10% of Vo,set to 90% of Vo, set) Output voltage overshoot - Startup IO= IO, max; VIN = 10 to 14Vdc, TA = 25 C o Overtemperature Protection All Tref (See Thermal Consideration section) Input Undervoltage Lockout Turn-on Threshold All 8.2 V Turn-off Threshold All 8.0 V May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 5 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Characteristic Curves The following figures provide typical characteristics for the Austin MicroLynxTM 12V SMT modules at 25C. 86 91 84 88 85 EFFICIENCY, (%) EFFICIENCY, (%) 82 80 78 76 VIN = 10V 74 VIN = 12V 72 0 1 2 3 4 79 VIN = 10V 76 VIN = 12V 73 VIN= 14V VIN= 14V 70 82 70 0 5 1 OUTPUT CURRENT, IO (A) 2 3 4 5 OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current (Vout = 1.2Vdc). Figure 4. Converter Efficiency versus Output Current (Vout = 2.5Vdc). 88 91 86 88 85 82 EFFICIENCY, (%) EFFICIENCY, (%) 84 80 78 76 VIN = 10V 74 VIN = 12V 72 82 79 VIN = 10V 76 VIN = 12V 73 VIN= 14V VIN= 14V 70 70 0 1 2 3 4 5 0 1 OUTPUT CURRENT, IO (A) 4 5 Figure 5. Converter Efficiency versus Output Current (Vout = 3.3Vdc). 96 88 86 93 84 90 82 EFFICIENCY, (%) EFFICIENCY, (%) 3 OUTPUT CURRENT, IO (A) Figure 2. Converter Efficiency versus Output Current (Vout = 1.5Vdc). 80 78 76 VIN = 10V 74 VIN = 12V 72 0 1 2 3 4 87 84 VIN = 10V 81 VIN = 12V 78 VIN= 14V VIN= 14V 75 70 5 0 1 OUTPUT CURRENT, IO (A) Figure 3. Converter Efficiency versus Output Current (Vout = 1.8Vdc). May 6, 2013 2 2 3 4 5 OUTPUT CURRENT, IO (A) Figure 6. Converter Efficiency versus Output Current (Vout = 5.0Vdc). (c)2013 General Electric Company. All rights reserved. Page 6 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Characteristic Curves (continued) The following figures provide typical characteristics for the MicroLynxTM 12V SMT modules at 25C. 4 Io = 0A 6 8 10 12 INPUT VOLTAGE, VIN (V) TIME, t (2s/div) Figure 8. Typical Output Ripple and Noise TIME, t (2s/div) Figure 9. Typical Output Ripple and Noise (Vin = 12.0V dc, Vo = 5.0 Vdc, Io=5A). May 6, 2013 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 (Vin = 12V dc, Vo = 0.75 Vdc, Io=5A). TIME, t (5 s/div) Figure 10. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3Vdc). OUTPUT CURRENT, OUTPUT VOLTAGE VO (V) (10mV/div) OUTPUT VOLTAGE Figure 7. Input voltage vs. Input Current (Vout = 5.0Vdc). 14 IO (A) (2A/div) 0 OUTPUT CURRENT, OUTPUT VOLTAGE 1 0.5 VO (V) (100mV/div) 2 1.5 IO (A) (2A/div) Io = 5A VO (V) (50mV/div) 3 2.5 IO (A) (2A/div) INPUT CURRENT, IIN (A) Io = 2.5A VO (V) (100mV/div) 3.5 TIME, t (10s/div) Figure 12. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 5.0 Vdc, Cext = 2x150 F Polymer Capacitors). (c)2013 General Electric Company. All rights reserved. Page 7 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Characteristic Curves (continued) OUTPUT VOLTAGE, INPUT VOLTAGE (2V/div) VIN (V) (5V/div) TIME, t (1 ms/div) Figure 17 Typical Start-Up using Remote On/off with Prebias (Vin = 12Vdc, Vo = 1.8Vdc, Io = 1A, Vbias =1.0 Vdc). OUTPUT CURRENT, VOn/off (V) (2V/div) VOV) (1V/div) OUTPUT VOLTAGE On/Off VOLTAGE (Vin = 12Vdc, Vo = 3.3Vdc, Io = 5.0A). VOn/off (V) (2V/div) On/Off VOLTAGE OUTPUT VOLTAGE On/Off VOLTAGE VOn/off (V) (5V/div) VOV) (2V/div) OUTPUT VOLTAGE TIME, t (1 ms/div) Figure 14. Typical Start-Up Using Remote On/Off TIME, t (1 ms/div) Figure 16. Typical Start-Up with application of Vin with (Vin = 12Vdc, Vo = 3.3Vdc, Io = 5A). VOV) (1V/div) TIME, t (10s/div) Figure 13. Transient Response to Dynamic Load Change from 100% of 50% full load (Vo = 5.0 Vdc, Cext = 2x150 F Polymer Capacitors). IO (A) (5A/div) OUTPUT CURRENT OUTPUTVOLTAGE IO (A) (2A/div) VO (V) (50mV/div) Vo (V) The following figures provide typical characteristics for the Austin MicroLynxTM 12V SMT modules at 25C. TIME, t (2 ms/div) TIME, t (20ms/div) Figure 15. Typical Start-Up Using Remote On/Off with LowESR external capacitors (7x150uF Polymer) Figure 18. Output short circuit Current (Vin = 12Vdc, Vo = 0.75Vdc). (Vin = 12Vdc, Vo = 3.3Vdc, Io = 5.0A, Co = 1050F). May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 8 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Characteristic Curves (continued) 6 6 5 5 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) The following figures provide thermal derating curves for the Austin MicroLynxTM 12V SMT modules. 4 3 NC 2 0.5m/s (100 LFM ) 1 0 20 30 40 50 60 70 AMBIENT TEMPERATURE, T AO 80 90 C NC 4 0.5m/s (100 LFM ) 3 1.0m/s (200 LFM ) 2 1.5m/s (300 LFM ) 1 2.0m/s (400 LFM ) 0 20 30 40 50 60 70 AMBIENT TEMPERATURE, T 80 90 C AO Figure 19. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 12Vdc, Vo=0.75Vdc). Figure 22. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 12Vdc, Vo=5.0 Vdc). 6 OUTPUT CURRENT, Io (A) 5 4 3 NC 2 0.5m/s (100 LFM ) 1 1.0m/s (200 LFM ) 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 = 12Vdc, Vo=1.8 Vdc). 6 OUTPUT CURRENT, Io (A) 5 4 3 NC 2 0.5m/s (100 LFM ) 1 1.0m/s (200 LFM ) 0 20 30 40 50 60 70 AMBIENT TEMPERATURE, T AO 80 90 C Figure 21. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 12Vdc, Vo=3.3 Vdc). May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 9 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Test Configurations Design Considerations CURRENT PROBE TO OSCILLOSCOPE The Austin MicroLynxTM 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. LTEST VIN(+) BATTERY 1H CIN CS 1000F Electrolytic 2x100F Tantalum E.S.R.<0.1 Input Filtering @ 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. In a typical application, 2x47 F low-ESR tantalum capacitors (AVX part #: TPSE476M025R0100, 47F 25V 100 m ESR tantalum capacitor) will be sufficient to provide adequate ripple voltage at the input of the module. To minimize ripple voltage at the input, low ESR ceramic capacitors are recommended at the input of the module. Figure 26 shows input ripple voltage (mVp-p) for various outputs with 2x47 F tantalum capacitors and with 2x 22 F ceramic capacitor (TDK part #: C4532X5R1C226M) at full load. COPPER STRIP 350 RESISTIVE LOAD 1uF . 10uF Input Ripple Voltage (mVp-p) VO (+) SCOPE COM 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. Figure 24. Output Ripple and Noise Test Setup. Rdistribution Rcontact Rcontact VIN(+) VO Rcontact Rcontact COM 250 200 150 100 Tantalum 50 Ceramic 0 0 1 2 3 4 5 6 Output Voltage (Vdc) Figure 26. Input ripple voltage for various output with 2x47 F tantalum capacitors and with 2x22 F ceramic capacitors at the input (80% of Io,max). RLOAD VO VIN Rdistribution Rdistribution 300 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 May 6, 2013 = VIN. IIN x 100 % (c)2013 General Electric Company. All rights reserved. Page 10 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Design Considerations (continued) Output Filtering The Austin MicroLynxTM 12V module is designed for low output ripple voltage and will meet the maximum output ripple specification with 1 F ceramic and 10 F polymer 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. Safety Considerations 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 0850:2001-12 (EN60950-1) Licensed. 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. 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. May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 11 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Feature Description Overcurrent Protection Remote On/Off The Austin MicroLynxTM SMT 12V power modules feature an On/Off pin for remote On/Off operation of the module. If not using the remote On/Off pin, leave the pin open (module will be On). The On/Off pin signal (Von/Off) is referenced to ground. To switch module on and off using remote On/Off, connect an open collector pnp transistor between the On/Off pin and the VIN pin (See Figure 27). When the transistor Q1 is in the OFF state, the power module is ON (Logic Low on the On/Off pin of the module) and the maximum Von/off of the module is 0.4 V. The maximum allowable leakage current of the transistor when Von/off = 0.4V and VIN = VIN,max is 10A. During a logic-high when the transistor is in the active state, the power module is OFF. During this state VOn/Off =10 - 14V and the maximum IOn/Off = 1mA. VIN(+) Lynx-series Module 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 2A. Input Undervoltage Lockout 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. Overtemperature Protection 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. IOn/Off On/Off Pin Enable 20k Css GND 20k Figure 27. Remote On/Off Implementation Remote On/Off can also be implemented using open-collector logic devices with an external pull-up resistor. Figure 28a shows the circuit configuration using this approach. Pull-up resistor, Rpull-up, for the configuration should be 68k (+/-5%) for proper operation of the module over the entire temperature range. VIN+ MODULE Rpull-up I ON/OFF ON/OFF + VON/OFF PWM Enable R1 Q2 Q1 CSS R2 GND _ Figure 27a. Remote On/Off Implementation using logic-level devices and an external pull-up resistor May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 12 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Feature Descriptions (continued) Output Voltage Programming V IN(+) The output voltage of the Austin MicroLynxTM 12V can be programmed to any voltage from 0.75Vdc to 5.5Vdc by connecting a resistor (shown as Rtrim in Figure 28) 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 Rtrim = - 1000 Vo - 0.7525 V O(+) ON/OFF LOAD TRIM + - GND Vtrim Figure 29. Circuit Configuration for programming Output voltage using external voltage source Rtrim is the external resistor in Vo is the desired output voltage For example, to program the output voltage of the Austin MicroLynxTM 12V module to 1.8V, Rtrim is calculated as follows: 10500 Rtrim = - 1000 1 . 8 - 0 . 7525 Rtrim = 9.024 k V IN(+) Table 1 provides Rtrim values for most common output voltages. Table 2 provides values of external voltage source, Vtrim for various output voltage. 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 VO, set (V) Vtrim (V) V O(+) ON/OFF LOAD TRIM R trim GND Figure 28. Circuit configuration to program output voltage using an external resistor Austin MicroLynxTM 12Vdc can also be programmed by applying a voltage between TRIM and GND pins (Figure 29). The following equation can be used to determine the value of Vtrim needed to obtain a desired output voltage Vo: Vtrim = (0.7 - 0.0667 x {Vo - 0.7525}) For example, to program the output voltage of a MicroLynxTM module to 3.3 Vdc, Vtrim is calculated as follows: Vtrim = (0.7 - 0.0667 x {3.3 - 0.7525}) Vtrim = 0.530V May 6, 2013 Table 2 0.7525 Open 1.2 0.670 1.5 0.650 1.8 0.630 2.5 0.583 3.3 0.530 5.0 0.4166 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.lineagepower.com under the Design Tools section, helps determine the required external trim resistor needed for a specific output voltage. (c)2013 General Electric Company. All rights reserved. Page 13 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Feature Descriptions (continued) The amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. When using the trim feature, the output voltage of the module can be increased, which at the same output current would increase the power output of the module. Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power (Pmax = Vo,set x Io,max). Voltage Margining Output voltage margining can be implemented in the Austin MicroLynxTM modules by connecting a resistor, Rmargin-up, from Trim pin to ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from Trim pin to Output pin. Figure 30 shows the circuit configuration for output voltage margining. The POL Programming Tool, available at www.lineagepower.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 Vo Rmargin-down Austin Lynx or Lynx II Series Q2 Trim Rmargin-up Rtrim Q1 GND Figure 30. Circuit Configuration for margining Output voltage. May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 14 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A 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 Module 76.2_ (3.0) x Air Flow Tref1 (inductor winding) 7.24_ (0.285) Probe Location for measuring airflow and ambient temperature Air flow Figure 32. Thermal Test Set-up. Heat Transfer via Convection Top View Tref2 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 1m/s (200 ft./min) are shown in the Characteristics Curves section. Layout Considerations Copper paths must not be routed beneath the power module. For additional layout guide-lines, refer to FLTR100V10 application note. Bottom View Figure 31. Tref Temperature measurement location. The thermal reference points, Tref 1 and Tref2 used in the specifications of thermal derating curves are shown in Figure 31. For reliable operation these temperatures should not exceed 125oC. 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. May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 15 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A 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.) Co-planarity (max): 0.102 [0.004] PIN FUNCTION 1 On/Off May 6, 2013 2 VIN 3 GND 4 Trim 5 VOUT (c)2013 General Electric Company. All rights reserved. Page 16 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A 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 May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 17 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Packaging Details The Austin MicroLynxTM 12V SMT versions are 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 Dimensions: 330.2 mm (13.00) Inside Dimensions: 177.8 mm (7.00") Width May 6, 2013 44.0 mm (1.73") (c)2013 General Electric Company. All rights reserved. Page 18 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Surface Mount Information The Austin MicroLynxTM 12V 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. combination of convection/IR. For reliable soldering the solder reflow profile should be established by accurately measuring the modules CP connector temperatures. 300 P eak Temp 235oC 250 REFLOW TEMP (C) Pick and Place Co o ling zo ne 1-4oCs -1 Heat zo ne max 4oCs -1 200 150 So ak zo ne 30-240s 100 Tlim above 205oC P reheat zo ne max 4oCs -1 50 0 REFLOW TIME (S) Figure 34. Reflow Profile for Tin/Lead (Sn/Pb) process. Figure 33. Pick and Place Location. 240 235 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) Nozzle Recommendations 230 225 220 215 210 205 200 0 10 20 30 40 50 60 Figure 35. Time Limit Curve Above 205oC for Tin/Lead (Sn/Pb) process. Tin Lead Soldering The Austin MicroLynxTM 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 May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 19 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Surface Mount Information (continued) 300 Lead Free Soldering Per J-STD-020 Rev. C Peak Temp 260C Reflow Temp (C) The -Z version Austin MicroLynx 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. 250 200 150 * Min. Time Above 235C 15 Seconds Heating Zone 1C/Second Cooling Zone *Time Above 217C 60 Seconds 100 50 Pb-free Reflow Profile 0 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 Fig. 36. Reflow Time (Seconds) Figure 36. Recommended linear reflow profile using Sn/Ag/Cu solder. MSL Rating The Austin MicroLynx 12V SMT modules have a MSL rating of 2a.. 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 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). May 6, 2013 (c)2013 General Electric Company. All rights reserved. Page 20 GE Data Sheet 12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules 10Vdc -14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current Ordering Information Please contact your GE representative for pricing, availability and optional features. Table 3. Device Codes Device Code Input Voltage Range Output Voltage Output Current Efficiency 3.3V@ 6A On/Off Logic Connector Type Comcodes AXA005A0X-SR 10 - 14Vdc 0.75 - 5.5Vdc 5A 89.0% Negative SMT 108981622 AXA005A0X-SRZ 10 - 14Vdc 0.75 - 5.5Vdc 5A 89.0% Negative SMT 108995172 -Z refers to RoHS compliant versions Contact Us For more information, call us at USA/Canada: +1 888 546 3243, or +1 972 244 9288 Asia-Pacific: +86.021.54279977*808 Europe, Middle-East and Africa: +49.89.74423-206 India: +91.80.28411633 www.ge.com/powerelectronics May 6, 2013 (c)2013 General Electric Company. All rights reserved. Version 1.53