Data Sheet February 26, 2009 Austin MinilynxTM SMT Non-isolated Power Modules: 2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc Output;3A 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 3A output current High efficiency – 94% at 3.3V full load (VIN = 5.0V) Small size and low profile: 20.3 mm x 11.4 mm x 7.27 mm (0.80 in x 0.45 in x 0.286 in) Low output ripple and noise High Reliability: Calculated MTBF = 11.9M hours at 25oC Full-load Applications Constant switching frequency (300 kHz) Output voltage programmable from 0.75 Vdc to 3.63Vdc via external resistor Distributed power architectures Intermediate bus voltage applications Line Regulation: 0.4% (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 (-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 ‡ Document No: DS04-026 ver. 1.12 PDF name: minilynx_smt_ds.pdf Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 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 All VIN -0.3 5.8 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 VO,set ≤ VIN – 0.5V VIN 2.4 ⎯ 5.5 Vdc Maximum Input Current All IIN,max 3.0 Adc VO,set = 0.75Vdc IIN,No load 10 mA VO,set = 3.3Vdc IIN,No load 17 mA All IIN,stand-by 0.6 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 35 Input Ripple Rejection (120Hz) All 30 (VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc) Input No Load Current (VIN = 5.0Vdc, IO = 0, module enabled) Input Stand-by Current (VIN = 5.0Vdc, module disabled) 2 0.04 2 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 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. LINEAGE POWER 2 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A 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 -3% ⎯ +3% % VO, set All VO 0.7525 3.63 Vdc (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 ⎯ 0.4 ⎯ % VO, set Load (IO=IO, min to IO, max) All ⎯ 0.4 ⎯ % VO, set Temperature (Tref=TA, min to TA, max) All ⎯ 0.4 ⎯ % VO, set RMS (5Hz to 20MHz bandwidth) All ⎯ 10 15 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 25 50 mVpk-pk 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 ⎯ ⎯ 1000 ⎯ 5000 μF 3 Adc All CO, max ⎯ Output Current All Io 0 Output Current Limit Inception (Hiccup Mode ) All IO, lim ⎯ 220 ⎯ % Io All IO, s/c ⎯ 2 ⎯ Adc VO,set = 0.75Vdc η 81.5 % 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 % ESR ≥ 10 mΩ (VO= 90% of VO, set) Output Short-Circuit Current (VO≤250mV) ( Hiccup Mode ) Efficiency Switching Frequency VO,set = 3.3Vdc η All fsw ⎯ 94.0 300 ⎯ kHz % All Vpk ⎯ 250 ⎯ 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 ⎯ 50 ⎯ μs (dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) Load Change from Io= 100% to 50%of Io,max: 1μF ceramic// 10 μF tantalum All Vpk ⎯ 250 ⎯ mV All ts ⎯ 50 ⎯ μs Peak Deviation Settling Time (Vo<10% peak deviation) LINEAGE POWER 3 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit All Vpk ⎯ 60 ⎯ 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 ⎯ 100 ⎯ 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 ⎯ 60 ⎯ mV Settling Time (Vo<10% peak deviation) All ts ⎯ 100 ⎯ μs General Specifications Parameter Min Calculated MTBF (IO=IO, max, TA=25°C) Weight LINEAGE POWER Typ Max 11,965,153 ⎯ 2.8 (0.1) Unit Hours ⎯ g (oz.) 4 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Data Sheet February 26, 2009 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 Input High Voltage (Module OFF) All VIH 1.5 Input High Current All IIH Input Low Voltage (Module ON) All VIL Input low Current All IIL Case 1: On/Off input is set to Logic Low (Module ON) and then input power is applied (delay from instant at which VIN =VIN, min until Vo=10% of Vo,set) All Tdelay 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 Output voltage Rise time (time for Vo to rise from 10% of Vo,set to 90% of Vo, set) All Device Code with no suffix – Negative Logic (On/OFF pin is open collector/drain logic input with external pull-up resistor; signal referenced to GND) -0.2 ― VIN,max Vdc 0.2 1 mA ― 0.3 Vdc ― 10 μA ― 3.9 ― msec Tdelay ― 3.9 ― msec Trise ― 4.2 8.5 msec ― 1 % VO, set ― ― 0.5 ⎯ 140 ⎯ Turn-On Delay and Rise Times o (IO=IO, max , VIN = VIN, nom, TA = 25 C, ) Output voltage overshoot – Startup o IO= IO, max; VIN = 3.0 to 5.5Vdc, TA = 25 C Remote Sense Range Overtemperature Protection All Tref °C (See Thermal Consideration section) Input Undervoltage Lockout Turn-on Threshold All 2.2 V Turn-off Threshold All 2.0 V LINEAGE POWER 5 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Data Sheet February 26, 2009 Characteristic Curves The following figures provide typical characteristics for the Austin MiniLynxTM SMT modules at 25ºC. 94 97 91 94 91 EFFICIENCY, η (%) EFFICIENCY, η (%) 88 85 82 79 VIN = 2.5V 76 VIN = 3.3V 73 VIN = 5.0V 0.6 1.2 1.8 2.4 85 82 VIN = 2.5V 79 VIN = 3.3V 76 VIN = 5.0V 73 70 0 88 0 3 0.6 OUTPUT CURRENT, IO (A) 2.4 3 Figure 4. Converter Efficiency versus Output Current (Vout = 1.8Vdc). 94 98 91 95 88 92 EFFICIENCY, η (%) EFFICIENCY, η (%) 1.8 OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current (Vout = 0.75Vdc). 85 82 79 VIN = 2.5V 76 VIN = 3.3V 73 VIN = 5.0V 70 89 86 83 VIN = 3.3V 80 VIN = 4.0V 77 VIN = 5.0V 74 0 0.6 1.2 1.8 2.4 3 0 0.6 OUTPUT CURRENT, IO (A) 96 90 93 EFFICIENCY, η (%) 99 93 87 84 VIN = 2.5V 78 VIN = 3.3V 75 VIN = 5.0V 72 0 0.6 1.2 1.8 2.4 OUTPUT CURRENT, IO (A) Figure 3. Converter Efficiency versus Output Current (Vout = 1.5Vdc). LINEAGE POWER 1.8 2.4 3 Figure 5. Converter Efficiency versus Output Current (Vout = 2.5Vdc). 96 81 1.2 OUTPUT CURRENT, IO (A) Figure 2. Converter Efficiency versus Output Current (Vout = 1.2Vdc). EFFICIENCY, η (%) 1.2 3 90 87 84 VIN = 4.0V 81 VIN = 5.0V 78 VIN = 5.5V 75 0 0.6 1.2 1.8 2.4 3 OUTPUT CURRENT, IO (A) Figure 6. Converter Efficiency versus Output Current (Vout = 3.3Vdc). 6 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Data Sheet February 26, 2009 Characteristic Curves (continued) 0 0 1 2 3 INPUT VOLTAGE, VIN (V) VO (V) (10mV/div) OUTPUT VOLTAGE Figure 7. Input voltage vs. Input Current (Vout =2.5Vdc). TIME, t (1μs/div) VO (V) (10mV/div) OUTPUT VOLTAGE Figure 8. Typical Output Ripple and Noise (VIN = 5.0V dc, Vo = 0.75Vdc, Io=3A). TIME, t (1μs/div) Figure 9. Typical Output Ripple and Noise (VIN = 5.0V dc, Vo = 3.3Vdc, Io=3A). LINEAGE POWER 4 5 VO (V) (100mV/div) IO (A) (2A/div) 0.5 TIME, t (20 μs/div) Figure 10. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 3.3Vdc). VO (V) (100mV/div) 1 IO (A) (2A/div) 1.5 OUTPUT CURRENT, OUTPUT VOLTAGE Io=0A 2 SMT modules at 25ºC. TIME, t (20 μs/div) Figure 11. Transient Response to Dynamic Load Change from 100% to 50% of full load (Vo = 3.3 Vdc). VO (V) (20mV/div) INPUT CURRENT, IIN (A) Io=1.5A 2.5 TM IO (A) (2A/div) Io=3A 3 OUTPUT CURRENT, OUTPUT VOLTAGE 3.5 OUTPUT CURRENT, OUTPUT VOLTAGE The following figures provide typical characteristics for the Austin MiniLynx TIME, t (100μs/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 February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Characteristic Curves (continued) Low-ESR external capacitors (7x150uF Polymer) (VIN = 5.0Vdc, Vo = 3.3Vdc, Io = 3A, Co = 1050μF). LINEAGE POWER INPUT VOLTAG VIN (V) (2V/div) OUTPUT VOLTAGE VO (V) (1V/div) TIME, t (2ms/div) Figure 15. Typical Start-Up Using Remote On/Off with VO (V) (0.5V/div) TIME, t (2ms/div) Figure 17 Typical Start-Up Using Remote On/Off with Prebias (VIN = 3.3Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias =1.0Vdc). OUTPUT CURRENT, VO (V) (1V/div) VOn/off(V) (2V/div) ON/OFF VOLTAGE OUTPUT VOLTAGE Figure 14. Typical Start-Up Using Remote On/Off (VIN = 5.0Vdc, Vo = 3.3Vdc, Io = 3A). OUTPUT VOLTAGE TIME, t (2ms/div) TIME, t (2ms/div) Figure 16. Typical Start-Up with application of Vin (VIN = 5.0Vdc, Vo = 3.3Vdc, Io = 3A). VOn/off(V) (2V/div) VO (V) (1V/div) VOn/off(V) (2V/div) ON/OFF VOLTAGE OUTPUT VOLTAGE Figure 13. Transient Response to Dynamic Load Change from 100% of 50% full load (Vo = 3.3Vdc, Cext = 2x150 μF Polymer Capacitors). ON/OFF VOLTAGE TIME, t (100μs/div) IO (A) (5A/div) OUTPUT CURRENT, OUTPUTVOLTAGE IO (A) (2A/div) VO (V) (20mV/div) The following figures provide typical characteristics for the Austin MiniLynxTM SMT modules at 25ºC. TIME, t (10ms/div) Figure 18. Output short circuit Current (VIN = 5.0Vdc, Vo = 0.75Vdc). 8 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Data Sheet February 26, 2009 Characteristic Curves (continued) 3.5 3.5 3 3 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) The following figures provide thermal derating curves for the Austin MiniLynxTM SMT modules. 2.5 2 1.5 1 0.5 0 LFM 0 20 30 40 50 60 70 80 2.5 2 1.5 1 0.5 0 LFM 0 90 20 O 40 50 60 70 80 90 AMBIENT TEMPERATURE, TA C Figure 19. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = 5.0, Vo=3.3Vdc). OUTPUT CURRENT, Io (A) 30 O AMBIENT TEMPERATURE, TA C Figure 22. Derating Output Current versus Local 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, TA C OUTPUT CURRENT, Io (A) Figure 20. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = 5.0Vdc, Vo=1.8 Vdc). Figure 23. Derating Output Current versus Local 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, TA C Figure 21. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = 5.0Vdc, Vo=0.75 Vdc). LINEAGE POWER Figure 24. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = 3.3dc, Vo=0.75 Vdc). 9 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Data Sheet February 26, 2009 Test Configurations Design Considerations CURRENT PROBE TO OSCILLOSCOPE 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. COPPER STRIP VO (+) RESISTIVE LOAD 1uF . 10uF TM The Austin MiniLynx 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. To minimize input voltage ripple, low-ESR polymer and ceramic capacitors are recommended at the input of the module. Figure 28 shows the input ripple voltage (mVp-p) for various outputs with 1x22µF (TDK: C3225X5R0J226V) ceramic capacitor at the input of the module. Figure 29 shows the input ripple with 1x47µF (TDK: C3225X5R0J476M) ceramic capacitor at full load. 160 Input Ripple Voltage (mVp-p) Figure 25. Input Reflected Ripple Current Test Setup. Input Filtering 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. Rcontact VIN(+) Rcontact Rcontact COM 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 27. Output Voltage and Efficiency Test Setup. 80 60 40 20 0.5 1 1.5 2 2.5 3 3.5 Output Voltage (Vdc) Figure 28. Input ripple voltage for various outputs with 1x22 µF ceramic capacitor at the input (fullload). 160 RLOAD VO VIN Rdistribution Rdistribution VO 100 0 3.3Vin Input Ripple Voltage (mVp-p) Rcontact 5Vin 120 0 Figure 26. Output Ripple and Noise Test Setup. Rdistribution 3.3Vin 140 140 5Vin 120 100 80 60 40 20 0 VO. IO Efficiency η = LINEAGE POWER VIN. IIN 0 x 100 % 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). 10 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 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 requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-103, and VDE 0850:2001-12 (EN60950-1) Licensed. TM The Austin MiniLynx 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 6A in the positive input lead. 11 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Data Sheet February 26, 2009 Feature Description VIN+ Remote On/Off TM The Austin MiniLynx SMT power modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available in the Austin MiniLynxTM series modules. Positive Logic On/Off signal, device code suffix “4”, turns the module ON during a logic High on the On/Off pin and turns the module OFF during a logic Low. Negative logic On/Off signal, no device code suffix, turns the module OFF during logic High on the On/Off pin and turns the module ON during logic Low. For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 30. The On/Off pin is an open collector/drain logic input signal (Von/Off) that is referenced to ground. During a logichigh (On/Off pin is pulled high internal to the module) when the transistor Q1 is in the Off state, the power module is ON. Maximum allowable leakage current of the transistor when Von/off = VIN,max is 10µA. Applying a logic-low when the transistor Q1 is turnedOn, the power module is OFF. During this state VOn/Off must be less than 0.3V. When not using positive logic On/off pin, leave the pin unconnected or tie to VIN. MODULE VIN+ R2 ON/OFF I ON/OFF + VON/OFF Q2 R1 PWM Enable R3 Q1 Q3 CSS R4 GND _ Figure 30. Circuit configuration for using positive logic On/OFF. For negative logic On/Off devices, the circuit configuration is shown is Figure 31. The On/Off pin is pulled high with an external pull-up resistor (typical Rpull-up = 5k, +/- 5%). When transistor Q1 is in the Off state, logic High is applied to the On/Off pin and the power module is Off. The minimum On/off voltage for logic High on the On/Off pin is 1.5Vdc. To turn the module ON, logic Low is applied to the On/Off pin by turning ON Q1. When not using the negative logic On/Off, leave the pin unconnected or tie to GND. LINEAGE POWER MODULE Rpull-up I ON/OFF ON/OFF + VON/OFF PWM Enable R1 Q2 Q1 CSS R2 GND _ Figure 31. Circuit configuration for using negative logic On/OFF. Overcurrent Protection To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range. The typical average output current during hiccup is 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 Tref, o exceeds 140 C (typical), but 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. Output Voltage Programming TM The output voltage of the Austin MiniLynx SMT can be programmed to any voltage from 0.75 Vdc to 3.63 Vdc by connecting a single resistor (shown as Rtrim in Figure 32) between the TRIM and GND pins of the module. Without an external resistor between TRIM pin and the ground, the output voltage of the module is 0.7525 Vdc. To calculate the value of the resistor Rtrim for a particular output voltage Vo, use the following equation: ⎡ 21070 ⎤ Rtrim = ⎢ − 5110⎥ Ω ⎣Vo − 0.7525 ⎦ 12 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Feature Descriptions (continued) Output Voltage Programming (continued) For example, to program the output voltage of the Austin MiniLynxTM module to 1.8 Vdc, Rtrim is calculated is follows: ⎡ 21070 ⎤ Rtrim = ⎢ − 5110⎥ 1 . 8 − 0 . 7525 ⎣ ⎦ Rtrim = 15.004 kΩ margining-up the output voltage and by connecting a resistor, Rmargin-down, from the 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.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. Vo Rmargin-down V IN(+) V O(+) Austin Lynx or Lynx II Series Q2 ON/OFF LOAD TRIM Trim R trim Rmargin-up GND Rtrim Q1 Figure 32. Circuit configuration to program output voltage using an external resistor. Table 1 provides Rtrim values required for some common output voltages. GND Figure 33. Circuit Configuration for margining Output voltage. 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.lineagepower.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 TM Austin MiniLynx modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for LINEAGE POWER 13 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Data Sheet February 26, 2009 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 setup is shown in Figure 35. Note that the airflow is parallel to the long axis of the module as shown in figure 34. 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 5.97_ (0.235) Air Flow Probe Location for measuring airflow and ambient temperature Air flow Figure 35. Thermal Test Set-up. Tref Figure 34. Tref Temperature measurement location. The thermal reference point, Tref used in the specifications is shown in Figure 34. For reliable operation this temperature should not exceed 115oC. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). Please refer to the Application Note “Thermal Characterization Process For Open-Frame BoardMounted Power Modules” for a detailed discussion of thermal aspects including maximum device temperatures. LINEAGE POWER 14 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 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] LINEAGE POWER 15 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 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 LINEAGE POWER 16 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Packaging Details The Austin MiniLynxTM SMT version is supplied in tape & reel as standard. Modules are shipped in quantities of 400 modules per reel. All Dimensions are in millimeters and (in inches). Reel Dimensions Outside diameter: Inside diameter: Tape Width: LINEAGE POWER 330.2 mm (13.00) 177.8 mm (7.00”) 44.0 mm (1.73”) 17 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Surface Mount Information 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. 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. 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 36. Pick and Place Location. Figure 37. Reflow Profile for Tin/Lead (Sn/Pb) process. 240 Nozzle Recommendations 235 MAX TEMP SOLDER (°C) 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. 230 225 220 215 210 205 200 0 Tin Lead Soldering The Austin MiniLynxTM 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. The Austin MiniLynxTM 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 LINEAGE POWER 10 20 30 40 50 60 o Figure 38. Time Limit Curve Above 205 C Reflow for Tin Lead (Sn/Pb) process. 18 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current Surface Mount Information (continued) Lead Free Soldering The –Z version Austin MiniLynx 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 Figure. 39. 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 Modules: Soldering and Cleaning Application Note (AN04-001). 300 200 Storage and Handling TM The Austin MiniLynx modules have a MSL rating of 1. 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 Reflow Temp (°C) The Austin MiniLynxTM SMT modules have a MSL rating of 1. LINEAGE POWER Per J-STD-020 Rev. C Peak Temp 260°C MSL Rating 250 150 * 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 39. Recommended linear reflow profile using Sn/Ag/Cu solder. 19 Data Sheet February 26, 2009 Austin MiniLynxTM SMT Non-isolated Power Modules: 2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A 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 Range Output Voltage Output Current Efficiency 3.3V@ 3A On/Off Logic Connector Type Comcodes AXH003A0X-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 3A 94.0 % Negative SMT 108991196 AXH003A0X-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 3A 94.0 % Negative SMT CC109101301 AXH003A0X4-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 3A 94.0 % Positive SMT 108991205 AXH003A0X4-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 3A 94.0 % Positive SMT 109100014 -Z refers to RoHS-compliant codes 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: DS04-026 ver. 1.12 PDF name: minilynx_smt_ds.pdf