Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules, Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A Output Current RoHS Compliant Features 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 10A of output current High efficiency – 93% at 3.3V full load (VIN = 12.0V) Small size and low profile: 33.00 mm x 13.46 mm x 8.28 mm (1.300 in x 0.530 in x 0.326 in) Low output ripple and noise High Reliability: o Calculated MTBF = 4.4 M hours at 25 C Full-load Applications Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Servers and storage applications Networking equipment Output voltage programmable from 0.75 Vdc to 5.5 Vdc via external resistor Line Regulation: 0.3% (typical) Load Regulation: 0.4% (typical) Temperature Regulation: 0.4% (typical) Remote On/Off Remote Sense Output overcurrent protection (non-latching) Overtemperature protection Wide operating temperature range (-40°C to 85°C) 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 TM The 12V Austin Lynx Programmable SMT (surface mount technology) power modules are non-isolated DC-DC converters that can deliver up to 10A of output current with full load efficiency of 93% at 3.3V output. These modules provide a precisely regulated output voltage programmable via an external resistor from 0.75Vdc to 5.5Vdc over a wide range of input voltage (VIN = 10 – 14Vdc). Their open-frame construction and small footprint enable designers to develop cost- and space-efficient solutions. Standard features include remote On/Off, remote sense, output voltage adjustment, overcurrent and overtemperature 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 ‡ Document No: DS03-097 ver. 1.42 PDF name: austin lynx smt 12v x3.pdf Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A 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 Unit Operating Input Voltage All VIN 10 12.0 14.0 Vdc Maximum Input Current All IIN,max 6.5 Adc VO,set = 0.75 Vdc IIN,No load 40 mA VO,set = 3.3Vdc IIN,No load 100 mA All IIN,stand-by 2.0 mA Inrush Transient All It Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; VIN, min to VIN, max, IO= IOmax ; See Test configuration section) All 20 Input Ripple Rejection (120Hz) All 30 (VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc) Input No Load Current (VIN = 12.0Vdc, IO = 0, module enabled) Input Stand-by Current (VIN = 12.0Vdc, module disabled) 2 2 0.4 As 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 fastacting fuse with a maximum rating of 15 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. LINEAGE POWER 2 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14 Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Electrical Specifications (continued) Parameter Output Voltage Set-point Device Symbol Min Typ Max Unit All VO, set –2.0 ⎯ +2.0 % VO, set All VO, set –2.5% ⎯ +3.5% % VO, set All VO 0.7525 5.5 % VO, set (VIN=IN, min, IO=IO, max, TA=25°C) 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 ⎯ 12 15 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 30 50 mVpk-pk ⎯ 1000 μF Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Cout = 1μF ceramic//10μFtantalum capacitors) External Capacitance ESR ≥ 1 mΩ All CO, max ⎯ All CO, max ⎯ ⎯ 5000 μF Output Current All Io 0 ⎯ 10 Adc Output Current Limit Inception (Hiccup Mode ) All IO, lim ⎯ 200 ⎯ % Io Output Short-Circuit Current All IO, s/c ⎯ 3 ⎯ Adc ESR ≥ 10 mΩ (VO≤250mV) ( Hiccup Mode ) Efficiency VIN= VIN, nom, TA=25°C IO=IO, max , VO= VO,set Switching Frequency VO, set = 0.75Vdc η 81.0 % VO, set = 1.2Vdc η 87.5 % VO,set = 1.5Vdc η 89.0 % VO,set = 1.8Vdc η 90.0 % VO,set = 2.5Vdc η 92.0 % VO,set = 3.3Vdc η 93.0 % VO,set = 5.0Vdc η 95.0 All fsw ⎯ 300 ⎯ kHz All Vpk ⎯ 200 ⎯ mV % Dynamic Load Response (dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) 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 ⎯ 25 ⎯ μs (dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 200 ⎯ mV All ts ⎯ 25 ⎯ μs Load Change from Io= 100% to 50%of Io,max: 1μF ceramic// 10 μF tantalum Peak Deviation Settling Time (Vo<10% peak deviation) LINEAGE POWER 3 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit All Vpk ⎯ 100 ⎯ mV Dynamic Load Response (dIo/dt=2.5A/μs; V VIN = VIN, nom; TA=25°C) 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 ⎯ 25 ⎯ μs (dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) Load Change from Io= 100% to 50%of Io,max: Co = 2x150 μF polymer capacitors Peak Deviation All Vpk ⎯ 100 ⎯ mV Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs General Specifications Parameter Min Calculated MTBF (IO=IO, max, TA=25°C) Weight LINEAGE POWER Typ Max 4,400,000 ⎯ 5.6 (0.2) Unit Hours ⎯ g (oz.) 4 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14 Vdc input; 0.75Vdc to 5.5Vdc Output; 10A 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 Von/Off All VIH Ion/Off All IIH ― ― VIN V ― ― 10 μA Von/Off All VIL Ion/off All IIL ― ― 0.3 V ― ― 1 mA All Tdelay 3 msec All Tdelay 3 msec All Trise Remote On/Off Signal interface (VIN=VIN, min to VIN, max; Open collector npn or equivalent Compatible, Von/off signal referenced to GND See feature description section) Logic High (On/Off Voltage pin open - Module ON) Logic Low (Von/Off ≤ 0.3V – Module Off) Turn-On Delay and Rise Times o (IO=IO, max , VIN = VIN, nom, TA = 25 C, ) 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) ― 4 6 msec ― 1 % VO, set ― ― 0.5 V ⎯ 125 ⎯ °C Output voltage overshoot – Startup o IO= IO, max; VIN = 10.0 to 14Vdc, TA = 25 C Remote Sense Range Overtemperature Protection All All Tref (See Thermal Consideration section) Input Undervoltage Lockout Turn-on Threshold All ⎯ 8.2 ⎯ V Turn-off Threshold All ⎯ 8.0 ⎯ V LINEAGE POWER 5 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Data Sheet April 8, 2008 Characteristic Curves 90 94 88 92 86 90 84 88 EFFICIENCY, η (%) EFFICIENCY, η (%) The following figures provide typical characteristics for the 12V Austin Lynx Programmable SMT modules at 25ºC. 82 80 78 76 Vin=14V 74 Vin=12V 72 Vin=10V 70 0 2 4 6 8 86 84 82 80 Vin=14V 78 Vin=12V 76 Vin=10V 74 10 0 2 OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current (Vout =1.2Vdc). 92 95 90 93 8 10 91 EFFICIENCY, η (%) EFFICIENCY, η (%) 6 Figure 4. Converter Efficiency versus Output Current (Vout = 2.5Vdc). 88 86 84 82 80 Vin=14V 78 Vin=12V 76 Vin=10V 74 0 2 4 6 8 89 87 Vin=14V 85 Vin=12V 83 Vin=10V 81 79 77 10 0 2 OUTPUT CURRENT, IO (A) 4 6 8 10 OUTPUT CURRENT, IO (A) Figure 2. Converter Efficiency versus Output Current (Vout = 1.5Vdc). Figure 5. Converter Efficiency versus Output Current (Vout = 3.3Vdc). 92 96 90 94 92 EFFICIENCY, η (%) 88 EFFICIENCY, η (%) 4 OUTPUT CURRENT, IO (A) 86 84 82 Vin=14V 80 Vin=12V 78 Vin=10V 76 90 Vin=14V 88 Vin=12V 86 Vin=10V 84 82 80 78 0 2 4 6 8 10 OUTPUT CURRENT, IO (A) Figure3. Converter Efficiency versus Output Current (Vout = 1.8Vdc). LINEAGE POWER 0 2 4 6 8 10 OUTPUT CURRENT, IO (A) Figure 6. Converter Efficiency versus Output Current (Vout = 5.0Vdc). 6 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14 Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Data Sheet April 8, 2008 Characteristic Curves (continued) 7 8 9 10 11 12 INPUT VOLTAGE, VIN (V) VO (V) (20mV/div) OUTPUT VOLTAGE Figure 7. Input voltage vs. Input Current (Vout = 3.3Vdc). TIME, t (2μs/div) VO (V) (20mV/div) OUTPUT VOLTAGE Figure 8. Typical Output Ripple and Noise (Vin = 12.0V dc, Vo = 2.5 Vdc, Io=10A). TIME, t (2μs/div) Figure 9. Typical Output Ripple and Noise (Vin = 12.0V dc, Vo = 5.0 Vdc, Io=10A). LINEAGE POWER 13 14 VO (V) (200mV/div) IO (A) (2A/div) 0 TIME, t (5 μs/div) Figure 10. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3Vdc). VO (V) (200mV/div) 1 IO (A) (2A/div) 2 OUTPUT CURRENT, OUTPUT VOLTAGE Io =0 A 3 TIME, t (5 μs/div) Figure 11. Transient Response to Dynamic Load Change from 100% to 50% of full load (Vo = 3.3 Vdc). VO (V) (100mV/div) Io =5A 4 IO (A) (2A/div) INPUT CURRENT, IIN (A) Io = 10 A 5 OUTPUT CURRENT, OUTPUT VOLTAGE 6 OUTPUT CURRENT, OUTPUT VOLTAGE The following figures provide typical characteristics for the 12V Austin Lynx Programmable SMT modules at 25ºC. TIME, t (10μs/div) Figure 12. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3 Vdc, Cext = 2x150 μF Polymer Capacitors). 7 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Characteristic Curves (continued) VOn/off (V) (5V/div) VO (1V/div) TIME, t (1 ms/div) Figure 15. Typical Start-Up Using Remote On/Off with Low-ESR external capacitors (Co= 5000μF) (Vin = 12.0Vdc, Vo = 5.0Vdc, Io = 10.0A, Co = 1050μF). LINEAGE POWER INPUT VOLTAGE VIN (V) (5V/div) OUTPUT VOLTAGE Vo (V) (2V/div) VOn/off (V) (2V/div) TIME, t (2 ms/div) Figure 17 Typical Start-Up Using Remote On/Off with Prebias (Vin = 12.0Vdc, Vo = 2.5Vdc, Io = 1.0A, Vbias =1.2Vdc). OUTPUT CURRENT, On/Off VOLTAGE OUTPUT VOLTAGE Figure 14. Typical Start-Up Using Remote On/Off (Vin = 12.0Vdc, Vo = 5.0Vdc, Io = 10.0A). On/Off VOLTAGE VOn/off (V) (5V/div) VOV) (1V/div) TIME, t (1 ms/div) Figure 16. Typical Start-Up with application of Vin with low-ESR polymer capacitors at the output (7x150 μF) (Vin = 12Vdc, Vo = 5.0Vdc, Io = 10A, Co = 1050 μF). VOV) (1V/div) On/Off VOLTAGE OUTPUT VOLTAGE Figure 13. Transient Response to Dynamic Load Change from 100% of 50% full load (Vo = 5.0 Vdc, Cext = 2x150 μF Polymer Capacitors). TIME, t (2 ms/div) OUTPUT VOLTAGE TIME, t (10μs/div) IO (A) (10A/div) OUTPUT CURRENT, OUTPUTVOLTAGE IO (A) (2A/div) VO (V) (100mV/div) The following figures provide typical characteristics for the 12V Austin Lynx Programmable SMT modules at 25ºC. TIME, t (10ms/div) Figure 18. Output short circuit Current (Vin = 12.0Vdc, Vo = 0.75Vdc). 8 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14 Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Data Sheet April 8, 2008 Characteristic Curves (continued) The following figures provide thermal derating curves for the 12V Austin Lynx Programmable SMT modules. 9 9 8 7 6 NC 5 100 LFM 4 200 LFM 3 300 LFM 2 400 LFM 1 0 20 30 40 50 60 70 80 90 O OUTPUT CURRENT, Io (A) 11 10 OUTPUT CURRENT, Io (A) 11 10 8 7 6 NC 5 100 LFM 4 200 LFM 3 300 LFM 2 1 400 LFM 0 20 30 40 50 60 70 80 AMBIENT TEMPERATURE, TA C AMBIENT TEMPERATURE, TA C Figure 19. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 12.0 Vdc, Vo=0.75Vdc). Figure 22. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 12.0 Vdc, Vo=5.0 Vdc). 11 OUTPUT CURRENT, Io (A) 10 9 8 7 6 NC 5 100 LFM 4 200 LFM 3 300 LFM 2 400 LFM 1 0 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, TA C Figure 20. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 12.0Vdc, Vo=1.8 Vdc). 11 OUTPUT CURRENT, Io (A) 10 9 8 7 6 NC 5 100 LFM 4 200 LFM 3 300 LFM 2 1 400 LFM 0 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, TA C Figure 21. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 12.0Vdc, Vo=3.3 Vdc). LINEAGE POWER 90 O 9 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Data Sheet April 8, 2008 Test Configurations Design Considerations CURRENT PROBE TO OSCILLOSCOPE The 12V Austin Lynx Programmable SMT module should be connected to a low ac-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 1μH CIN CS 1000μF Electrolytic 2x100μF Tantalum E.S.R.<0.1Ω @ 20°C 100kHz COM NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1μH. Capacitor CS offsets possible battery impedance. Measure current as shown above. Figure 23. Input Reflected Ripple Current Test Setup. COPPER STRIP In a typical application, 4x47 µF low-ESR tantalum capacitors (AVX part #: TPSE476M025R0100, 47µF 25V 100 mΩ 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 (mVpp) for various outputs with 4x47 µF tantalum capacitors and with 4x22 µF ceramic capacitor (TDK part #: C4532X5R1C226M) at full load. RESISTIVE LOAD 1uF . 10uF 300 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. Input Ripple Voltage (mVp-p) VO (+) Input Filtering 250 200 150 100 Tantalum 50 Ceramic 0 0 Rdistribution Rcontact Rcontact VIN(+) VO Rdistribution RLOAD VO VIN Rcontact Rcontact COM 1 2 3 4 5 Rdistribution Output Voltage (Vdc) Figure 26. Input ripple voltage for various output with 4x22 µF polymer and 4x47 µF ceramic capacitors at the input (full load). 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 η = LINEAGE POWER VIN. IIN x 100 % 10 6 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14 Vdc input; 0.75Vdc to 5.5Vdc Output; 10A 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 0850:2001-12 (EN60950-1) Licensed. The 12V Austin Lynx Programmable SMT module is designed for low output ripple voltage and will meet the maximum output ripple specification with 1 µF ceramic and 10 µF 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. LINEAGE POWER 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 fastacting fuse with a maximum rating of 15A in the positive input lead. 11 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Data Sheet April 8, 2008 the thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. The module will automatically restart after it cools down. Feature Description Remote On/Off The 12V Austin Lynx Programmable SMT power modules feature an On/Off pin for remote On/Off operation. 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 the module on and off using remote On/Off, connect an open collector npn transistor between the On/Off pin and the ground pin (See Figure 27). During a logic-high (On/Off pin is pulled high internal to the module) when the transistor is in the Off state, the power module is ON. The maximum allowable leakage current of the transistor when Von/off = VIN,max is 10µA. During a logic-low when the transistor is turned-on, the power module is OFF. During this state VOn/Off is less than 0.3V and the maximum IOn/Off = 1mA. MODULE VIN+ R2 ON/OFF I ON/OFF + VON/OFF Output Voltage Programming The output voltage of the 12V Austin Lynx Programmable SMT module 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⎥ Ω ⎣Vo − 0.7525 ⎦ For example, to program the output voltage of the 12V Austin Lynx Programmable SMT module to 1.8 Vdc, Rtrim is calculated is follows: ⎤ ⎡ 10500 − 1000⎥ ⎦ ⎣1.8 − 0.75 Rtrim = ⎢ Q2 R1 Rtrim = 9.024 kΩ PWM Enable R3 Q1 Q3 CSS V IN(+) V O(+) Vout R4 GND _ ON/OFF Figure 27. Remote On/Off Implementation. 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 A. 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 o thermal reference point Tref, exceeds 125 C (typical), but LINEAGE POWER LOAD TRIM R trim GND Figure 28. Circuit configuration for programming 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 22.46 1.5 13.05 1.8 9.024 2.5 5.009 3.3 3.122 5.0 1.472 12 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14 Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Data Sheet April 8, 2008 Feature Descriptions (continued) Voltage Margining By using a 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. Output voltage margining can be implemented in the 12V Austin Lynx Programmable SMT 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 Lineage Power technical representative for additional details 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). Vo Rmargin-down Austin Lynx or Lynx II Series Remote Sense Q2 The 12V Austin Lynx Programmable SMT power modules have a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the Remote Sense and GND pins (See Figure 29). The voltage between the Sense pin and Vo pin must not exceed 0.5V. Although both the Remote Sense and the TRIM features can increase the output voltage Vo, the maximum increase is not the sum of both. The maximum Vo increase is the larger of either the Remote Sense or TRIM. The amount of power delivered by the module is defined as the output voltage multiplied by the output current (Vo x Io). When using Remote Sense and/or TRIM, the output voltage of the module can increase, which if the same output is maintained, increases the power output by the module. Make sure that the maximum output power of the module remains at or below the maximum rated power. When the Remote Sense feature is not being used, leave the Remote Sense pin unconnected. Rdistribution Rcontact Trim Rmargin-up Rtrim Q1 GND Figure 30. Circuit Configuration for margining Output voltage. Rcontact Rdistribution VIN(+) VO Sense RLOAD Rdistribution Rcontact Rcontact Rdistribution COM COM Figure 29. Remote sense circuit configuration LINEAGE POWER 13 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Thermal Considerations Power modules operate in a variety of thermal environments; however, sufficient cooling should always 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 short axis of the module as shown in figure 31. The derating data applies to airflow in either direction of the module’s short axis. Top View 25.4_ (1.0) Wind Tunnel PWBs Power Module 76.2_ (3.0) Tref x 8.3_ (0.325) Probe Loc ation for measuring airflow and ambient temperature Air flow Air Flow Figure 31. Tref Temperature measurement location. The thermal reference point, Tref used in the specifications is shown in Figure 31. For reliable o operation this temperature 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 BoardMounted Power Modules” for a detailed discussion of thermal aspects including maximum device temperatures. LINEAGE POWER Figure 32. Thermal Test Set-up. Heat Transfer via Convection Increased airflow over the module enhances the heat transfer via convection. Thermal derating curves showing the maximum output current that can be delivered at different local ambient temperatures (TA) for airflow conditions ranging from natural convection and up to 2m/s (400 ft./min) are shown in the Characteristics Curves section. 14 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14 Vdc input; 0.75Vdc to 5.5Vdc Output; 10A 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.) LINEAGE POWER 15 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A 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.) LINEAGE POWER 16 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14 Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Packaging Details The 12V Austin Lynx Programmable SMT version is supplied in tape & reel as standard. Modules are shipped in quantities of 250 modules per reel. All Dimensions are in millimeters and (in inches). Reel Dimensions: Outside Dimensions: Inside Dimensions: Tape Width: LINEAGE POWER 330.2 mm (13.00) 177.8 mm (7.00”) 44.00 mm (1.732”) 17 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Surface Mount Information Pick and Place The 12V Austin Lynx Programmable 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 place operations. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to o withstand reflow temperatures of up to 300 C. The label also carries product information such as product code, serial number and the location of manufacture. 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 soldering the solder reflow profile should be established by accurately measuring the modules CP connector temperatures. 300 P eak Temp 235oC Figure 33. Pick and Place Location. REFLOW TEMP (°C) 250 150 So ak zo ne 30-240s 100 TM The Austin Lynx 12 V 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 LINEAGE POWER 0 REFLOW TIME (S) Figure 34. Reflow Profile for Tin/Lead (Sn/Pb) process. 240 235 MAX TEMP SOLDER (°C) Tin Lead Soldering Tlim above 205oC P reheat zo ne max 4oCs -1 50 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 placement speed should be considered to optimize this process. The minimum recommended nozzle diameter for reliable operation is 6mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 9 mm. Oblong or oval nozzles up to 11 x 9 mm may also be used within the space available. Co o ling zo ne 1-4oCs -1 Heat zo ne max 4oCs -1 200 230 225 220 215 210 205 200 0 10 20 30 40 50 60 Figure 35. Time Limit Curve Above 205oC for Tin/Lead (Sn/Pb) process. 18 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14 Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Surface Mount Information (continued) Lead Free Soldering The –Z version 12V Austin Lynx Programmable SMT modules are lead-free (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 Fig. 36. Modules: Soldering and Cleaning Application Note (AN04-001). 300 Per J-STD-020 Rev. C Peak Temp 260°C 250 Reflow Temp (°C) Data Sheet April 8, 2008 200 150 * Min. Time Above 235°C 15 Seconds Heating Zone 1°C/Second Cooling Zone *Time Above 217°C 60 Seconds 100 50 0 Reflow Time (Seconds) Figure 36. Recommended linear reflow profile using Sn/Ag/Cu solder. MSL Rating The 12V Austin Lynx Programmable SMT modules have a MSL rating of 2. 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 ≤ 30°C 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 LINEAGE POWER 19 Data Sheet April 8, 2008 12V Austin LynxTM SMT Non-isolated Power Modules Programmable: 10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 10A output current Ordering Information Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 2. Device Codes Device Code Input Voltage Output Voltage Output Current Efficiency Connector Type Comcodes AXA010A0X3-SR 10 – 14Vdc 0.75 – 5.5 V 10 A 93% SMT 108970138 AXA010A0X3-SRZ 10 – 14Vdc 0.75 – 5.5 V 10 A 93% SMT CC109101326 -Z refers to RoHS-compliant versions Asia-Pacific Headquarters Tel: +65 6416 4283 World Wide Headquarters Lineage Power Corporation 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 (Outside U.S.A.: +1-972-284-2626) www.lineagepower.com e-mail: [email protected] Europe, Middle-East and Africa Headquarters Tel: +49 89 6089 286 India Headquarters Tel: +91 80 28411633 Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. 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. © 2008 Lineage Power Corporation, (Mesquite, Texas) All International Rights Reserved. LINEAGE POWER 20 Document No: DS03-097 ver. 1.42 PDF name: austin lynx smt 12v x3.pdf