Data Sheet June 6, 2008 ATM020A0X3-SR, Austin SuperLynx IITM SMT Non-isolated Power Module: 2.4Vdc – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A Output Current RoHS Compliant Features Compliant to RoHS EU Directive 2002/95/EC Compatible in a Pb-free or SnPb reflow environment Flexible output voltage sequencing EZ-SEQUENCE Delivers up to 20A of output current High efficiency – 89% at 1.8V full load (VIN = 2.4V) Small size and low profile: 33.00 mm x 13.46 mm x 8.28 mm EZ-SEQUENCETM (1.300 in x 0.530 in x 0.326 in) Low output ripple and noise High Reliability: Calculated MTBF > 11.9 M hours at 25oC Full-load Applications Output voltage programmable from 0.75 Vdc to 2.0Vdc via external resistor Line Regulation: 0.3% (typical) Load Regulation: 0.4% (typical) Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Temperature Regulation: 0.4% (typical) Servers and storage applications Remote On/Off Networking equipment Remote Sense Output overcurrent protection (non-latching) Over temperature 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 ATM020A0X3-SR belongs to the Austin SuperLynx IITM SMT (surface mount technology) power module product families that are non-isolated dc-dc converters delivering up to 20A of output current with full load efficiency of 89% at 1.8V output. These modules provide a precisely regulated output voltage programmable via external resistor TM from 0.75Vdc to 2.0Vdc over a wide range of input voltage (VIN = 2.4 – 3.63Vdc). Austin SuperLynx II has a TM sequencing feature, EZ-SEQUENCE that enable designers to implement simultaneous or ratiometric startup of multiple rails on board. Their open-frame construction and small footprint enable designers to develop cost- and space-efficient solutions. In addition to sequencing, standard features include remote On/Off, remote sense, programmable output voltage, over current and over temperature 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: DS06-110 ver. 1.81 PDF name: atm020a0x3_sr.pdf Data Sheet June 6, 2008 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A 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 4.0 Vdc Sequencing Voltage All VSEQ -0.3 ViN, Max Vdc Operating Ambient Temperature All TA -40 85 °C All Tstg -55 125 °C Input Voltage Continuous (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 2.4 ⎯ 3.63 Vdc 20.0 Adc Operating Input Voltage VO,set ≤ VIN – 0.5V VIN Maximum Input Current All IIN,max VO,set = 0.75Vdc IIN,No load 80 mA VO,set = 1.8Vdc IIN,No load 110 mA All IIN,stand-by 1.5 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 100 Input Ripple Rejection (120Hz) All 30 (VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc) Input No Load Current (VIN = 2.4Vdc, IO = 0, module enabled) Input Stand-by Current (VIN = 2.4Vdc, module disabled) 2 0.1 2 As mAp-p dB CAUTION: This power module is not internally fused. This power module can be used in a wide variety of applications, ranging from simple standalone operation to being part of complex power architecture. To preserve maximum flexibility, internal fusing is not included. This power module meets all safety agency requirements without presence of an input fuse. However, to achieve maximum safety and system protection, an input line fuse may be used. 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 June 6, 2008 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A 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 –3% ⎯ +3% % VO, set All VO 0.7525 2.0 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 ⎯ 0.3 % 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 ⎯ 8 15 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 25 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 ⎯ 20 Adc Output Current Limit Inception (Hiccup Mode ) All IO, lim ⎯ 180 ⎯ % Io Output Short-Circuit Current All IO, s/c ⎯ 3.5 ⎯ Adc ESR ≥ 10 mΩ (VO≤250mV) ( Hiccup Mode ) Efficiency VO,set = 0.75Vdc η 77.5 % VIN= 2.4V, TA=25°C VO, set = 1.2Vdc η 83.5 % IO=IO, max , VO= VO,set VO,set = 1.8Vdc η Switching Frequency All fsw ⎯ 300 ⎯ kHz All Vpk ⎯ 200 ⎯ mV 89.0 % Dynamic Load Response (dI/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 (dI/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 ⎯ 200 ⎯ mV All ts ⎯ 25 ⎯ μs Peak Deviation Settling Time (Vo<10% peak deviation) LINEAGE POWER 3 Data Sheet June 6, 2008 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit All Vpk ⎯ 120 ⎯ mV Dynamic Load Response (dI/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 ⎯ 50 ⎯ μs (dI/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 ⎯ 120 ⎯ mV Settling Time (Vo<10% peak deviation) All ts ⎯ 50 ⎯ μs General Specifications Parameter Min Calculated MTBF (IO=IO, max, TA=25°C) Weight LINEAGE POWER Typ Max 11,967,000 ⎯ 5.6 (0.2) Unit Hours ⎯ g (oz.) 4 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 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 Vdc Input High Current All IIH Input Low Voltage (Module ON) All VIL Input low Current 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) ― VIN,max 0.2 1 mA ― 0.3 Vdc IIL ― 10 μA All Tdelay 3.9 msec All Tdelay 3.9 msec All Trise -0.2 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) ― 4.2 8.5 msec ― 1 % VO, set ⎯ 125 ⎯ °C Output voltage overshoot – Startup o IO= IO, max; VIN = 3.0 to 5.5Vdc, TA = 25 C Over temperature Protection All Tref (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 SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 Characteristic Curves 90 96 88 95 86 94 EFFICIENCY, η (%) EFFICIENCY, η (%) The following figures provide typical characteristics for the Austin SuperLynx IITM SMT modules at 25ºC. 84 82 Vin = 2.4V 80 Vin = 3.3V 78 Vin = 3.63V 76 93 92 Vin = 2.4V 91 Vin = 3.3V 90 Vin = 3.63V 89 88 74 0 4 8 12 16 0 20 4 OUTPUT CURRENT, IO (A) 16 20 Figure 2. Converter Efficiency versus Output Current (Vout = 1.8Vdc). 94 20 18 INPUT CURRENT, IIN (A) 92 EFFICIENCY, η (%) 12 OUTPUT CURRENT, IO (A) Figure 1. Converter Efficiency versus Output Current (Vout = 0.75Vdc). 90 88 86 Vin = 2.4V 84 Vin = 3.3V Vin = 3.63V 82 80 0 4 8 12 16 20 Figure 5. Transient Response to Dynamic Load Change from 50% to 100% of full load (Vo = 1.2 Vdc). LINEAGE POWER 12 10 8 Io = 10A 6 4 2 Io = 0A 0 1.5 2 2.5 3 3.5 4 VO (V) (100mV/div) Figure 4. Input voltage vs. Input Current (Vout = 1.8Vdc). IO (A) (10A/div) TIME, t (100μs/div) Io = 20A 14 INPUT VOLTAGE, VIN (V) OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (10A/div) VO (V) (200mV/div) Figure 3. Converter Efficiency versus Output Current (Vout = 1.2Vdc). 16 1 OUTPUT CURRENT, IO (A) OUTPUT CURRENT, OUTPUT VOLTAGE 8 TIME, t (20μs/div) Figure 6. Transient Response to Dynamic Load Change from 100% to 50% of full load (Vo = 1.2 Vdc, Cext = 2x150 μF Polymer Capacitors). 6 Data Sheet June 6, 2008 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Characteristic Curves (continued) TIME, t (5 ms/div) On/Off VOLTAGE Figure 11. Typical Start-Up with application of Vin (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 2A). LINEAGE POWER INPUT VOLTAGE VNN (V) (2V/div) OUTPUT VOLTAGE VOV) (1V/div) VOn/off (V) (1V/div) TIME, t (5 ms/div) Figure 10. Typical Start-Up applying Vin with Prebias (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 1.0A, Vbias =1.0Vdc). OUTPUT CURRENT, VOV) (1V/div) OUTPUT VOLTAGE VOn/off (V) (2V/div) Figure 9. Typical Start-Up Using Remote On/Off (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 20.0A). On/Off VOLTAGE VOn/off (V) (1V/div) VOV) (1V/div) TIME, t (5 ms/div) Figure 8. Typical Start-Up with application of Vin (Vin = 3.3Vdc, Vo = 1.8Vdc, Io = 0A). VOV) (1V/div) On/Off VOLTAGE OUTPUT VOLTAGE Figure 7. Typical Output Ripple and Noise (Vin = 3.3Vdc, Vo = 1.8Vdc, Io=20A). TIME, t (5 ms/div) OUTPUT VOLTAGE TIME, t (2μs/div) IO (A) (10A/div) VO (V) (20mV/div) OUTPUT VOLTAGE The following figures provide typical characteristics for the Austin ATM020A0X SMT modules at 25ºC. TIME, t (20ms/div) Figure 12. Output short circuit Current (Vin = 3.3Vdc, Vo = 0.75Vdc). 7 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 Characteristic Curves (continued) The following figures provide thermal derating curves for the Austin ATM020A0X SMT modules. 25 400lfm 2.0 m/s 20 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) 25 NC 15 100lfm 0.5 m/s 10 200lfm 1.0 m/s 300lfm 1.5 m/s 5 0 0 10 20 30 40 50 60 70 80 O AMBIENT TEMPERATURE, TA C Figure 13. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 3.3Vdc, Vo=1.0Vdc). LINEAGE POWER 90 400lfm 2.0 m/s 20 NC 100lfm 200lfm 0.5 m/s 1.0 m/s 300lfm 1.5 m/s 15 10 5 0 0 10 20 30 40 50 60 70 80 O AMBIENT TEMPERATURE, TA C Figure 14. Derating Output Current versus Local Ambient Temperature and Airflow (Vin = 3.3Vdc, Vo=1.8Vdc). 8 90 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 Test Configurations CURRENT PROBE TO OSCILLOSCOPE Rdistribution Rcontact Rcontact VIN(+) LTEST VIN(+) 1μH RLOAD VO VIN BATTERY Rdistribution VO CIN CS 1000μF Electrolytic 2x100μF Tantalum E.S.R.<0.1Ω Rdistribution Rcontact Rcontact COM @ 20°C 100kHz Rdistribution COM 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 15. Input Reflected Ripple Current Test Setup. 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 17. Output Voltage and Efficiency Test Setup. VO. IO COPPER STRIP Efficiency VO (+) RESISTIVE LOAD 1uF . 10uF η = VIN. IIN x 100 % 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 16. Output Ripple and Noise Test Setup. LINEAGE POWER 9 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 Input Filtering TM The Austin SuperLynx II SMT module should be connected to a low-impedance AC 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. 130 120 110 100 90 80 70 60 0.7 1.1 1.5 1.9 2.3 Output Voltage (Vdc) Figure 18. Input ripple voltage for various output with 2x150 µF polymer and 2x47 µF ceramic capacitors at the input (Vin=3.3V, full load) Input Ripple Voltage (mVp-p) To minimize input voltage ripple, low-ESR polymer and ceramic capacitors are recommended at the input of the module. Figure 18 shows the input ripple voltage (mVpp) for various outputs with 2x150 µF polymer capacitors (Panasonic p/n: EEFUE0J151R, Sanyo p/n: 6TPE150M) in parallel with 2 x 47 µF ceramic capacitor (Panasonic p/n: ECJ-5YB0J476M, Taiyo- Yuden p/n: CEJMK432BJ476MMT) at full load. Figure 19 shows the input ripple with 4x150 µF polymer capacitors in parallel with 4 x 47 µF ceramic capacitor at full load. Input Ripple Voltage (mVp-p) Design Considerations 120 110 100 90 80 70 60 0.7 1.1 1.5 1.9 2.3 Output Voltage (Vdc) Figure 19. Input ripple voltage for various output with 4x150 µF polymer and 4x47 µF ceramic capacitors at the input (Vin=3.3V, full load). LINEAGE POWER 10 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 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. TM The Austin SuperLynx II 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. 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. 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 11 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 Feature Description Lynx II Module VIN(+) Remote On/Off TM Austin SuperLynx II SMT power modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available in the Austin SuperLynx IITM series modules. Positive Logic On/Off signal, device code suffix “4”, turns the module ON during a logic High on the On/Off pin and turns the module OFF during a logic Low. Negative logic On/Off signal, no device code suffix, turns the module OFF during logic High and turns the module ON during logic Low. For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 20. The On/Off pin is an open collector/drain logic input signal (Von/Off) that is referenced to ground. During a logic-high (On/Off pin is pulled high internal to the module) when the transistor Q1 is in the Off state, the power module is ON. Maximum allowable leakage current of the transistor when Von/off = VIN,max is 10µA. Applying a logic-low when the transistor Q1 is turned-On, the power module is OFF. During this state VOn/Off must be less than 0.3V. When not using positive logic On/off pin, leave the pin unconnected or tie to VIN. VIN(+) Lynx series Module 20k 20k 20k Von/off Enable Css GND 20k Figure 20. Remote On/Off Implementation. For negative logic On/Off devices, the circuit configuration is shown is Figure 21. The On/Off pin is pulled high with an external pull-up resistor (typical Rpullup = 68k, +/- 5%). When transistor Q1 is in the Off state, logic High is applied to the On/Off pin and the power module is Off. The minimum On/off voltage for logic High on the On/Off pin is 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 IOn/Off On/Off Pin + VOn/Off Q2 Q1 GND _ PWM Enable R1 Css R2 Figure 21. Circuit configuration for using negative logic On/OFF Overcurrent Protection To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range. The typical average output current during hiccup is 3.5A. Input Undervoltage Lockout On/Off Ion/off + Rpull-up 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, exceeds 125oC (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. 12 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 www.lineagepower.com, determines the set point variation with specific trim resistor values and tolerances. Feature Descriptions (continued) Output Voltage Programming TM The output voltage of the Austin SuperLynx II SMT can be programmed to any voltage from 0.75 Vdc to 2.0 Vdc by connecting a single resistor (shown as Rtrim in Figure 22) 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 ⎦ Voltage Margining For example, to program the output voltage of the Austin TM SuperLynx module to 1.8 Vdc, Rtrim is calculated is follows: ⎤ ⎡ 21070 − 5110⎥ Rtrim = ⎢ ⎦ ⎣1.8 − 0.7525 Rtrim = 15.004 kΩ V IN(+) V O(+) 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). Vout Output voltage margining can be implemented in the TM Austin SuperLynx II modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to the Output pin for margining-down. Figure 23 shows the circuit configuration for output voltage margining. The POL Programming tool available at www.lineagepower.com computes 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 ON/OFF LOAD TRIM MODULE R trim GND Q2 Trim Rmargin-up Rtrim Figure 22. Circuit configuration for programming output voltage using an external resistor. Q1 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 GND Figure 23. Circuit Configuration for margining Output voltage. 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 LINEAGE POWER 13 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 Feature Descriptions (continued) Remote Sense Voltage Sequencing The Austin SuperLynx IITM SMT power modules have a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the Remote Sense pin (See Figure 24). The voltage between the Sense pin and Vo pin must not exceed 0.5V. TM Austin SuperLynx II series of modules include a sequencing feature, EZ-SEQUENCE that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected. When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The SEQ voltage must be set higher than the set-point voltage of the module. The output voltage follows the voltage on the SEQ pin on a one-to-one volt basis. By connecting multiple modules together, customers can get multiple modules to track their output voltages to the voltage applied on the SEQ pin. 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, 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, connect the Remote Sense pin to the output pin. R d istrib u tio n R co n ta c t R c o nta ct V IN (+ ) R d istrib utio n VO S e n se For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the module is ON by default. After applying input voltage to the module, a minimum of 10msec delay is required before applying voltage on the SEQ pin. During this time, potential of 50mV (± 10 mV) is maintained on the SEQ pin. After 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will track this voltage on a one-to-one volt bases until output reaches the set-point voltage. To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. Output voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential. R LO AD R d istrib u tio n R co n ta c t R c o nta ct COM R d istrib utio n COM Figure 24. Remote sense circuit configuration TM When using the EZ-SEQUENCE feature to control start-up of the module, pre-bias immunity feature during start-up is disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode TM during start-up. When using the EZ-SEQUENCE feature, modules goes through an internal set-up time of 10msec, and will be in synchronous rectification mode when voltage at the SEQ pin is applied. This will result in sinking current in the module if pre-bias voltage is present at the output of the module. When pre-bias immunity TM during start-up is required, the EZ-SEQUENCE feature must be disabled. For additional guidelines on using EZSEQUENCETM feature of Austin SuperLynx IITM, contact the Lineage Power technical representative for preliminary application note on output voltage sequencing TM using Austin SuperLynx II series. LINEAGE POWER 14 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 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 25. Note that the airflow is parallel to the long axis of the module as shown in figure 26. 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 Top View 5.97_ (0.235) Probe Location for measuring airflow and ambient temperature Air flow Figure 26. Thermal Test Set-up. Tref Bottom View 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. Air Flow Figure 25. Tref Temperature measurement location. Layout Considerations Copper paths must not be routed beneath the power module. For additional layout guide-lines, refer to the FLTR100V10 application note. The thermal reference point, Tref used in the specifications is shown in Figure 25. 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 15 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 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.) Top View Co-planarity (max): 0.20 [0.008] Side View Bottom View PIN FUNCTION 1 On/Off 2 VIN 3 SEQ 4 GND 5 VOUT 6 Trim 7 Sense MPS176595 LINEAGE POWER 16 Data Sheet June 6, 2008 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A 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 17 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 Packaging Details TM The Austin SuperLynx II 250 modules per reel. SMT version is supplied in tape & reel as standard. Modules are shipped in quantities of 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”) 18 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 Surface Mount Information Pick and Place TM The Austin SuperLynx II 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 withstand reflow o temperatures of up to 300 C. The label also carries product information such as product code, serial number and the location of manufacture. observe these instructions may result in the failure of or cause damage to the modules, and can adversely affect long-term reliability. In a conventional Tin/Lead (Sn/Pb) solder process peak reflow temperatures are limited to less than o o 235 C. Typically, the eutectic solder melts at 183 C, 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 REFLOW TEMP (°C) 250 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 Figure 27. Pick and Place Location. 0 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. Tin Lead Soldering 240 235 230 225 220 215 210 205 TM The Austin SuperLynx II 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 LINEAGE POWER REFLOW TIME (S) Figure 28. Reflow Profile for Tin/Lead (Sn/Pb) process MAX TEMP SOLDER (°C) Nozzle Recommendations 200 0 10 20 30 40 50 60 o Figure 29. Time Limit Curve Above 205 C for Tin/Lead (Sn/Pb) process 19 Data Sheet June 6, 2008 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Surface Mount Information (continued) 300 Lead Free Soldering 250 Reflow Temp (° C) The SMT modules of the Austin SuperLynx IITM families 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. Per J-STD-020 Rev. C Peak Temp 245° C Cooling Zone 4° C / second 200 * Min. Time Above 235° C 15 seconds 150 Heating Zone 1° C / second * Time Above 217° C 60 seconds 100 50 Pb-free Reflow Profile 0 Reflow Time (in seconds) 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. 38. Figure 30. Recommended linear reflow profile using Sn/Ag/Cu solder. Storage and Handling The Austin SuperLynx IITM 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 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). LINEAGE POWER 20 Austin SuperLynx IITM SMT Non-isolated Power Modules: 2.4 – 3.63Vdc input; 0.75Vdc to 2.0Vdc Output; 20A output current Data Sheet June 6, 2008 Ordering Information Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 3. Device Codes Input Voltage Output Voltage Output Current Efficiency 1.8V @ 20A Connector Type 2.4 - 3.63Vdc 0.75 – 2.0Vdc 20A 89% SMT ATM020A0X3-SR CC109103628 2.4 - 3.63Vdc 0.75 – 2.0Vdc 20A 89% SMT ATM020A0X3-SRZ CC109135984 Product codes Comcode -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 21 Document No: DS06-110 ver. 1.81 PDF name: atm020a0x3_sr.pdf