Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Features  Compliant to RoHS EU Directive 2011/65/EU (-Z RoHS Compliant 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 – 94% at 3.3V full load (V = 5.0V) IN  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)  Low output ripple and noise  High Reliability: Applications o Calculated MTBF = 11.9M hours at 25 C Full-load  Distributed power architectures  Constant switching frequency (300 kHz)  Intermediate bus voltage applications  Output voltage programmable from 0.75 Vdc to 3.63Vdc via external resistor  Telecommunications equipment  Line Regulation: 0.4% (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 (-40°C to 85°C) †  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 Description TM Austin MiniLynx 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 94.0% at 3.3V output. These modules provide a precisely regulated output voltage programmable via an external resistor from 0.75Vdc to 3.63Vdc over a wide range of input voltage (VIN = 2.4 – 5.5Vdc). Their open-frame construction and small footprint enable designers to develop cost- and space-efficient solutions. * 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 ©2015 General Electric Company. All rights reserved. Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc 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 Device Symbol Min Max Unit Input Voltage All VIN -0.3 5.8 Vdc Continuous Operating Ambient Temperature All TA -40 85 °C (see Thermal Considerations section) Storage Temperature All Tstg -55 125 °C Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Device Symbol Min Typ Max Unit Operating Input Voltage VO,set ≤ VIN – 0.5V VIN 2.4  5.5 Vdc Maximum Input Current All IIN,max 3.0 Adc (VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc) Input No Load Current V = 0.75Vdc I 10 mA O,set IN,No load (V = 5.0Vdc, I = 0, module enabled) V = 3.3Vdc I 17 mA IN O O,set IN,No load Input Stand-by Current All IIN,stand-by 0.6 mA (V = 5.0Vdc, module disabled) IN 2 2 Inrush Transient All I t 0.04 A s Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; V to V All 35 mAp-p IN, min IN, max, I = I ; See Test configuration section) O Omax Input Ripple Rejection (120Hz) All 30 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 ©2015 General Electric Company. All rights reserved. Page 2 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Output Voltage Set-point All VO, set -2.0 VO, set +2.0 % VO, set (VIN=IN, min, IO=IO, max, TA=25°C) Output Voltage All V -3%  +3% % V O, set O, set (Over all operating input voltage, resistive load, and temperature conditions until end of life) Adjustment Range All VO 0.7525 3.63 Vdc Selected by an external resistor Output Regulation Line (V =V to V ) All  0.4  % V IN IN, min IN, max O, set Load (I =I to I ) All  0.4  % V O O, min O, max O, set Temperature (T =T to T ) All  0.4  % V ref A, min A, max O, set Output Ripple and Noise on nominal output (V =V and I =I to I IN IN, nom O O, min O, max Cout = 1μF ceramic//10μFtantalum capacitors) RMS (5Hz to 20MHz bandwidth) All  10 15 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All  25 50 mVpk-pk External Capacitance ESR ≥ 1 mΩ All CO, max   1000 μF ESR ≥ 10 mΩ All CO, max   5000 μF Output Current All Io 0 3 Adc Output Current Limit Inception (Hiccup Mode ) All IO, lim  220  % Io (V = 90% of V ) O O, set Output Short-Circuit Current All IO, s/c  2  Adc (VO≤250mV) ( Hiccup Mode ) VO,set = Efficiency η 81.5 % 0 75Vdc VIN= VIN, nom, TA=25°C VO, set = 1.2Vdc η 87.0 % IO=IO, max , VO= VO,set VO,set = 1.5Vdc η 89.0 % VO,set = 1.8Vdc η 90.0 % VO,set = 2.5Vdc η 93.0 % VO,set = 3.3Vdc η 94.0 % Switching Frequency All fsw  300  kHz Dynamic Load Response (dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk  250  mV Load Change from Io= 50% to 100% of Io,max; 1μF ceramic// 10 μF tantalum Peak Deviation Settling Time (Vo<10% peak deviation) All ts  50  µs (dIo/dt=2.5A/µs; V = V ; T =25°C) All Vpk  250  mV IN IN, nom A Load Change from Io= 100% to 50%of Io,max: 1μF ceramic// 10 μF tantalum Peak Deviation Settling Time (Vo<10% peak deviation) All t s  50  µs September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 3 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Dynamic Load Response All V 60 mV (dIo/dt=2.5A/µs; V VIN = VIN, nom; TA=25°C) pk   Load Change from Io= 50% to 100% of Io,max; Co = 2x150 μF polymer capacitors Peak Deviation Settling Time (Vo<10% peak deviation) All ts  100  µs (dIo/dt=2.5A/µs; VIN = VIN, nom; TA=25°C) All Vpk  60  mV Load Change from Io= 100% to 50%of Io,max: Co = 2x150 μF polymer capacitors Peak Deviation Settling Time (Vo<10% peak deviation) All ts  100  µs General Specifications Parameter Min Typ Max Unit Calculated MTBF (IO=IO, max, TA=25°C) 11,965,153 Hours Weight  2.8 (0.1)  g (oz.) September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 4 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc 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 Min Typ Max Unit 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) Input High Voltage (Module ON) All VIH ― ― VIN, max V Input High Current All IIH ― ― 10 μA Input Low Voltage (Module OFF) All VIL -0.2 ― 0.3 V Input Low Current All IIL ― 0.2 1 mA 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) Input High Voltage (Module OFF) All VIH 1.5 ― VIN,max Vdc Input High Current All IIH 0.2 1 mA Input Low Voltage (Module ON) All VIL -0.2 ― 0.3 Vdc Input low Current All IIL ― 10 μA Turn-On Delay and Rise Times o (IO=IO, max , VIN = VIN, nom, TA = 25 C, ) All Tdelay ― 3.9 ― msec Case 1: On/Off input is set to Logic Low (Module ON) and then input power is applied (delay from instant at which V =V until Vo=10% of Vo,set) IN IN, min All Tdelay ― 3.9 ― msec 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 Trise ― 4.2 8.5 msec Output voltage Rise time (time for Vo to rise from 10% of Vo,set to 90% of Vo, set) 1 Output voltage overshoot – Startup ― % VO, set o I = I ; V = 3.0 to 5.5Vdc, T = 25 C O O, max IN A Remote Sense Range ― ― 0.5 Overtemperature Protection All T 140 °C ref   (See Thermal Consideration section) Input Undervoltage Lockout Turn-on Threshold All 2.2 V Turn-off Threshold All 2.0 V September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 5 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Characteristic Curves TM The following figures provide typical characteristics for the Austin MiniLynx SMT modules at 25ºC. 94 97 91 94 88 91 85 88 85 82 79 82 IN IN V = 2.5V V = 2.5V 79 76 VIN = 3.3V VIN = 3.3V 76 73 IN IN V = 5.0V V = 5.0V 73 70 0 0.6 1.2 1.8 2.4 3 0 0.6 1.2 1.8 2.4 3 OUTPUT CURRENT, I (A) OUTPUT CURRENT, I (A) O O Figure 1. Converter Efficiency versus Output Current (Vout = Figure 4. Converter Efficiency versus Output Current (Vout = 0.75Vdc). 1.8Vdc). 94 98 91 95 92 88 85 89 82 86 79 83 VIN = 2.5V VIN = 3.3V 76 80 IN V = 3.3V VIN = 4.0V 73 77 IN V = 5.0V IN V = 5.0V 70 74 0 0.6 1.2 1.8 2.4 3 0 0.6 1.2 1.8 2.4 3 OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A) Figure 2. Converter Efficiency versus Output Current (Vout = Figure 5. Converter Efficiency versus Output Current (Vout = 1.2Vdc). 2.5Vdc). 96 99 93 96 90 93 87 90 84 87 81 84 IN V = 2.5V IN V = 4.0V 78 81 IN V = 3.3V IN V = 5.0V 75 78 VIN = 5.0V VIN = 5.5V 72 75 0 0.6 1.2 1.8 2.4 3 0 0.6 1.2 1.8 2.4 3 OUTPUT CURRENT, I (A) OUTPUT CURRENT, I (A) O O Figure 3. Converter Efficiency versus Output Current (Vout = Figure 6. Converter Efficiency versus Output Current (Vout = 1.5Vdc). 3.3Vdc). September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 6 EFFICIENCY, η (%) EFFICIENCY, η (%) EFFICIENCY, η (%) EFFICIENCY, η (%) EFFICIENCY, η (%) EFFICIENCY, η (%) Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Characteristic Curves (continued) TM The following figures provide typical characteristics for the Austin MiniLynx SMT modules at 25ºC. 3.5 Io=3A 3 Io=1.5A 2.5 Io=0A 2 1.5 1 0.5 0 0 1 2 3 4 5 INPUT VOLTAGE, V (V) IN TIME, t (20 µs/div) Figure 7. Input voltage vs. Input Current Figure 10. Transient Response to Dynamic Load Change (Vout =2.5Vdc). from 50% to 100% of full load (Vo = 3.3Vdc). TIME, t (1µs/div) TIME, t (20 µs/div) Figure 8. Typical Output Ripple and Noise Figure 11. Transient Response to Dynamic Load Change (VIN = 5.0V dc, Vo = 0.75Vdc, Io=3A). from 100% to 50% of full load (Vo = 3.3 Vdc). TIME, t (1µs/div) TIME, t (100µs/div) Figure 9. Typical Output Ripple and Noise Figure 12. Transient Response to Dynamic Load Change (VIN = 5.0V dc, Vo = 3.3Vdc, Io=3A). from 50% to 100% of full load (Vo = 3.3 Vdc, Cext = 2x150 μF Polymer Capacitors). September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 7 OUTPUT VOLTAGE OUTPUT VOLTAGE INPUT CURRENT, I (A) VO (V) (10mV/div) VO (V) (10mV/div) IN OUTPUT CURRENT, OUTPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (2A/div) VO (V) (20mV/div) IO (A) (2A/div) VO (V) (100mV/div) IO (A) (2A/div) VO (V) (100mV/div) Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Characteristic Curves (continued) TM The following figures provide typical characteristics for the Austin MiniLynx SMT modules at 25ºC. TIME, t (2ms/div) TIME, t (100µs/div) Figure 13. Transient Response to Dynamic Load Change Figure 16. Typical Start-Up with application of Vin from 100% of 50% full load (Vo = 3.3Vdc, Cext = 2x150 μF (VIN = 5.0Vdc, Vo = 3.3Vdc, Io = 3A). Polymer Capacitors). TIME, t (2ms/div) TIME, t (2ms/div) Figure 14. Typical Start-Up Using Remote On/Off Figure 17 Typical Start-Up Using Remote On/Off with (VIN = 5.0Vdc, Vo = 3.3Vdc, Io = 3A). Prebias (VIN = 3.3Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias =1.0Vdc). TIME, t (2ms/div) TIME, t (10ms/div) Figure 15. Typical Start-Up Using Remote On/Off with Low- Figure 18. Output short circuit Current ESR external capacitors (7x150uF Polymer) (VIN = 5.0Vdc, Vo = 0.75Vdc). (VIN = 5.0Vdc, Vo = 3.3Vdc, Io = 3A, Co = 1050µF). September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 8 ON/OFF VOLTAGE OUTPUT VOLTAGE ON/OFF VOLTAGE OUTPUT VOLTAGE OUTPUT CURRENT, OUTPUTVOLTAGE VOn/off(V) (2V/div) VO (V) (1V/div) VOn/off(V) (2V/div) VO (V) (1V/div) IO (A) (2A/div) VO (V) (20mV/div) OUTPUT CURRENT, ON/OFF VOLTAGE OUTPUT VOLTAGE INPUT VOLTAG OUTPUT VOLTAGE V IN IO (A) (5A/div) VOn/off(V) (2V/div) VO (V) (0.5V/div) (V) (2V/div) VO (V) (1V/div) Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Characteristic Curves (continued) TM The following figures provide thermal derating curves for the Austin MiniLynx SMT modules. 3.5 3.5 3 3 2.5 2.5 2 2 1.5 1.5 1 1 0.5 0.5 0 LFM 0 LFM 0 0 20 30 40 50 60 70 80 90 20 30 40 50 60 70 80 90 O O AMBIENT TEMPERATURE, T C AMBIENT TEMPERATURE, T C A A Figure 19. Derating Output Current versus Local Ambient Figure 22. Derating Output Current versus Local Temperature and Airflow (VIN = 5.0, Vo=3.3Vdc). Ambient Temperature and Airflow (VIN = 3.3dc, Vo=2.5 Vdc). 3.5 3.5 3 3 2.5 2.5 2 2 1.5 1.5 1 1 0.5 0.5 0 LFM 0 LFM 0 0 20 30 40 50 60 70 80 90 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, T C A Figure 20. Derating Output Current versus Local Ambient Figure 23. Derating Output Current versus Local Temperature and Airflow (VIN = 5.0Vdc, Vo=1.8 Vdc). Ambient Temperature and Airflow (VIN = 3.3dc, Vo=1.2 Vdc). 3.5 3.5 3 3 2.5 2.5 2 2 1.5 1.5 1 1 0.5 0.5 0 LFM 0 LFM 0 0 20 30 40 50 60 70 80 90 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, T C A Figure 21. Derating Output Current versus Local Ambient Figure 24. Derating Output Current versus Local Temperature and Airflow (VIN = 5.0Vdc, Vo=0.75 Vdc). Ambient Temperature and Airflow (VIN = 3.3dc, Vo=0.75 Vdc). Test Configurations September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 9 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current CURRENT PROBE TO OSCILLOSCOPE Design Considerations L TEST Input Filtering V (+) IN 1μH TM The Austin MiniLynx SMT module should be connected to a low-impedance source. A highly inductive source can affect CIN CS 1000μF Electrolytic the stability of the module. An input capacitance must be 2x100μF E.S.R.<0.1Ω placed directly adjacent to the input pin of the module, to Tantalum @ 20°C 100kHz minimize input ripple voltage and ensure module stability. COM To minimize input voltage ripple, low-ESR polymer and ceramic capacitors are recommended at the input of the NOTE: Measure input reflected ripple current with a simulated module. Figure 28 shows the input ripple voltage (mVp-p) source inductance (L ) of 1μH. Capacitor C offsets TEST S possible battery impedance. Measure current as shown for various outputs with 1x22µF (TDK: C3225X5R0J226V) above. ceramic capacitor at the input of the module. Figure 29 shows the input ripple with 1x47µF (TDK: C3225X5R0J476M) Figure 25. Input Reflected Ripple Current Test Setup. ceramic capacitor at full load. 160 COPPER STRIP 3.3Vin 140 V O (+) RESISTIVE 5Vin LOAD 120 1uF . 10uF SCOPE 100 COM 80 GROUND PLANE 60 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 40 to avoid measurement errors due to socket contact resistance. 20 Figure 26. Output Ripple and Noise Test Setup. 0 0 0.5 1 1.5 2 2.5 3 3.5 R R R R distribution contact contact distribution Output Voltage (Vdc) V (+) V IN O Figure 28. Input ripple voltage for various outputs with 1x22 µF ceramic capacitor at the input (full-load). R LOAD V VIN O 160 3.3Vin 140 Rdistribution Rcontact Rcontact Rdistribution 5Vin COM COM 120 100 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 80 to avoid measurement errors due to socket contact resistance. 60 Figure 27. Output Voltage and Efficiency Test Setup. 40 20 V . I O O Efficiency η = x 100 % 0 V . I IN IN 0 0.5 1 1.5 2 2.5 3 3.5 Output Voltage (Vdc) Figure 29. Input ripple voltage for various outputs with 1x47 µF ceramic capacitor at the input (full load). September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 10 BATTERY Input Ripple Voltage (mVp-p) Input Ripple Voltage (mVp-p) Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc 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 TM The Austin MiniLynx SMT module is designed for low requirements of the end-use safety agency standards, i.e., output ripple voltage and will meet the maximum output UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001- ripple specification with 1 µF ceramic and 10 µF tantalum 12 (EN60950-1) Licensed. 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 For the converter output to be considered meeting the reduce the output ripple and noise of the module. Second, requirements of safety extra-low voltage (SELV), the input the dynamic response characteristics may need to be must meet SELV requirements. The power module has customized to a particular load step change. extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a fast-acting To reduce the output ripple and improve the dynamic fuse with a maximum rating of 6A in the positive input lead. 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 ©2015 General Electric Company. All rights reserved. Page 11 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Feature Description VIN+ MODULE Remote On/Off R pull-up TM The Austin MiniLynx SMT power modules feature an I ON/OFF On/Off pin for remote On/Off operation. Two On/Off logic ON/OFF TM options are available in the Austin MiniLynx series + PWM Enable modules. Positive Logic On/Off signal, device code suffix “4”, V ON/OFF R1 turns the module ON during a logic High on the On/Off pin and turns the module OFF during a logic Low. Negative Q2 CSS logic On/Off signal, no device code suffix, turns the module Q1 OFF during logic High on the On/Off pin and turns the R2 module ON during logic Low. GND _ For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 30. The On/Off pin is an Figure 31. Circuit configuration for using negative logic open collector/drain logic input signal (Von/Off) that is On/OFF. 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 Overcurrent Protection allowable leakage current of the transistor when Von/off = To provide protection in a fault (output overload) condition, VIN,max is 10µA. Applying a logic-low when the transistor Q1 the unit is equipped with internal current-limiting circuitry is turned-On, the power module is OFF. During this state and can endure current limiting continuously. At the point of VOn/Off must be less than 0.3V. When not using positive current-limit inception, the unit enters hiccup mode. The unit logic On/off pin, leave the pin unconnected or tie to VIN. operates normally once the output current is brought back into its specified range. The typical average output current VIN+ MODULE during hiccup is 2A. R2 Input Undervoltage Lockout ON/OFF Q2 At input voltages below the input undervoltage lockout limit, + R1 V module operation is disabled. The module will begin to ON/OFF I ON/OFF PWM Enable operate at an input voltage above the undervoltage lockout turn-on threshold. R3 Q1 Overtemperature Protection Q3 CSS To provide over temperature protection in a fault R4 condition, the unit relies upon the thermal protection feature of the controller IC. The unit will shutdown if the GND _ o thermal reference point Tref, exceeds 140 C (typical), but the thermal shutdown is not intended as a guarantee that Figure 30. Circuit configuration for using positive logic the unit will survive temperatures beyond its rating. The On/OFF. module will automatically restart after it cools down. Output Voltage Programming For negative logic On/Off devices, the circuit configuration is TM The output voltage of the Austin MiniLynx SMT can be shown is Figure 31. The On/Off pin is pulled high with an programmed to any voltage from 0.75 Vdc to 3.63 Vdc by external pull-up resistor (typical Rpull-up = 5k, +/- 5%). When connecting a single resistor (shown as Rtrim in Figure 32) transistor Q1 is in the Off state, logic High is applied to the between the TRIM and GND pins of the module. Without an On/Off pin and the power module is Off. The minimum external resistor between TRIM pin and the ground, the On/off voltage for logic High on the On/Off pin is 1.5Vdc. To output voltage of the module is 0.7525 Vdc. To calculate the turn the module ON, logic Low is applied to the On/Off pin by value of the resistor Rtrim for a particular output voltage Vo, turning ON Q1. When not using the negative logic On/Off, use the following equation: leave the pin unconnected or tie to GND.  21070  Rtrim= − 5110Ω   Vo− 0.7525   Feature Descriptions (continued) Output Voltage Programming (continued) September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 12 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current For example, to program the output voltage of the Austin Vo TM MiniLynx module to 1.8 Vdc, Rtrim is calculated is follows: Rmargin-down 21070   Rtrim= − 5110   Austin Lynx or 1.8− 0.7525   Lynx II Series Rtrim= 15.004kΩ Q2 Trim V (+) V (+) IN O Rmargin-up Rtrim LOAD ON/OFF TRIM Q1 R trim GND GND Figure 33. Circuit Configuration for margining Output voltage. Figure 32. 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 (KΩ) 0.7525 Open 1.2 41.973 1.5 23.077 1.8 15.004 2.5 6.947 3.3 3.160 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, helps determine the required external trim resistor needed for a specific output voltage. Voltage Margining Output voltage margining can be implemented in the Austin TM MiniLynx modules by connecting a resistor, R , from margin-up the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, R , from the margin-down Trim pin to the Output pin for margining-down. Figure 33 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. September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 13 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Thermal Considerations 25.4_ Wind Tunnel (1.0) Power modules operate in a variety of thermal environments; however, sufficient cooling should always be PWBs provided to help ensure reliable operation. Power Module 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 76.2_ taken in a wind tunnel. The test set-up is shown in Figure (3.0) 35. Note that the airflow is parallel to the long axis of the module as shown in figure 34. The derating data applies to x airflow in either direction of the module’s long axis. Probe Location for measuring 5.97_ airflow and (0.235) ambient temperature Air flow Figure 35. Thermal Test Set-up. Figure 34. T Temperature measurement ref location. The thermal reference point, Tref used in the specifications is shown in Figure 34. For reliable operation this temperature o should not exceed 115 C. 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 ©2015 General Electric Company. All rights reserved. Page 14 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc 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 SIDE VIEW Co-planarity (max): 0.102 [0.004] September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 15 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc 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 ©2015 General Electric Company. All rights reserved. Page 16 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Packaging Details TM The Austin MiniLynx 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: 330.2 mm (13.00) Inside diameter: 177.8 mm (7.00”) Tape Width: 44.0 mm (1.73”) September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 17 Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Surface Mount Information Pick and Place TM The Austin MiniLynx 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. REFLOW TIME (S) Figure 37. Reflow Profile for Tin/Lead (Sn/Pb) process. Figure 36. Pick and Place Location. 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 o Figure 38. Time Limit Curve Above 205 C Reflow for Tin considered to optimize this process. The minimum Lead (Sn/Pb) process. 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. Tin Lead Soldering TM The Austin MiniLynx SMT power modules are lead free modules and can be soldered either in a lead-free solder process or 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. TM The Austin MiniLynx SMT power modules are lead free modules and can be soldered either in a lead-free solder process or 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. September 25, 2015 ©2015 General Electric Company. All rights reserved. Page 18 MAX TEMP SOLDER (°C) REFLOW TEMP (°C) Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current packages should not be broken until time of use. Once the Surface Mount Information (continued) original package is broken, the floor life of the product at Lead Free Soldering conditions of ≤ 30°C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life The –Z version Austin MiniLynx SMT modules are lead-free for dry packed SMT packages will be a minimum of 12 (Pb-free) and RoHS compliant and are both forward and months from the bag seal date, when stored at the following backward compatible in a Pb-free and a SnPb soldering conditions: < 40° C, < 90% relative humidity. 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. Post Solder Cleaning and Drying Considerations Post solder cleaning is usually the final circuit-board Pb-free Reflow Profile assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the Power Systems will comply with J-STD-020 Rev. C reliability of a power module and the testability of the (Moisture/Reflow Sensitivity Classification for Nonhermetic finished circuit-board assembly. For guidance on Solid State Surface Mount Devices) for both Pb-free solder appropriate soldering, cleaning and drying procedures, refer profiles and MSL classification procedures. This standard to Board Mounted Power Modules: Soldering and Cleaning provides a recommended forced-air-convection reflow Application Note (AN04-001). profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu 300 Per J-STD-020 Rev. C (SAC). The recommended linear reflow profile using Peak Temp 260°C Sn/Ag/Cu solder is shown in Figure. 39. 250 Cooling 200 Zone MSL Rating * Min. Time Above 235°C 15 Seconds 150 TM Heating Zone *Time Above 217°C The Austin MiniLynx SMT modules have a MSL rating of 1°C/Second 60 Seconds 2a. 100 50 Storage and Handling TM The Austin MiniLynx modules have a MSL rating of 1. The 0 recommended storage environment and handling Reflow Time (Seconds) procedures for moisture-sensitive surface mount packages Figure 39. Recommended linear reflow profile using is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping Sn/Ag/Cu solder. 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 ©2015 General Electric Company. All rights reserved. Page 19 Reflow Temp (°C) Data Sheet GE TM Austin MiniLynx : SMT Non-Isolated DC-DC Power Modules 2.4Vdc – 5.5Vdc input; 0.75Vdc to 3.63Vdc output; 3A Output Current Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. Table 2. Device Codes Input Output Output Efficiency On/Off Connector Device Code Comcodes Voltage Range Voltage Current 3.3V@ 3A Logic Type AXH003A0X-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 3 A 94.0 % Negative SMT 108991196 AXH003A0X-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 3 A 94.0 % Negative SMT CC109101301 AXH003A0X4-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 3 A 94.0 % Positive SMT 108991205 AXH003A0X4-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 3 A 94.0 % Positive SMT 109100014 -Z refers to RoHS-compliant codes 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 ©2015 General Electric Company. All International rights reserved. Version 1.15