Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current 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) High efficiency – 95% at 12V full load Delivers up to 25A output current Low output ripple and noise Industry standard Quarter brick: RoHS Compliant 57.9 mm x 36.8 mm x 10.6 mm (2.28 in x 1.45 in x 0.42 in) Applications Constant switching frequency Distributed power architectures Positive Remote On/Off logic Intermediate bus voltage applications Output over current/voltage protection Servers and storage applications Over temperature protection Networking equipment including Power over Ethernet (PoE) Options Negative Remote On/Off logic Active load sharing (Parallel Operation) Baseplate option (-H) Auto restart after fault shutdown Case ground pin Wide operating temperature range (-40°C to 85°C) UL*Recognized to UL60950-1, CAN/CSA C22.2 No.60950-1, and EN60950-1(VDE ‡ 0805-1) Licensed CE mark meets 2006/95/EC directive Meets the voltage and current requirements for ETSI 300-132-2 and complies with and licensed for Basic insulation rating per EN60950-1 2250 Vdc Isolation tested in compliance with IEEE ¤ 802.3 PoE standards ISO** 9001 certified manufacturing facilities † § Description The QSW025A0B series of dc-dc converters are a new generation of DC/DC power modules designed to support 12Vdc intermediate bus applications where multiple low voltages are subsequently generated using point of load (POL) converters. The QSW025A0B series are enhanced from their predecessor QBW025A0B series, with improvements to the internal shutdown control, improved response to input voltage transients, and inclusion of output reverse current protection during startup. The QSW025A0B series operate from an input voltage range of 36 to 75Vdc and provide up to 25A output current at 12V in an industry standard quarter brick. The converter incorporates synchronous rectification technology and innovative packaging techniques to achieve efficiency reaching 95% at 12V full load. This leads to lower power dissipations such that for many applications a heat sink is not required. The output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. Builtin filtering for both input and output minimizes the need for external filtering. * 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. This product is intended for integration into end-user equipment . All of the required procedures of end-use equipment should be followed. Document No: DS08-008 ver 1.1 PDF Name: QSW025A0B_ds.pdf Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A 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 device reliability. Parameter Device Symbol Min VIN -0.3 Max Unit Input Voltage* Continuous Operating transient ≤ 100mS Non- operating continuous 75 Vdc 100 Vdc VIN -0.3 100 Vdc All TA -40 85 °C All Tstg -55 125 °C I/O Isolation Voltage (100% factory Hi-Pot tested) All 2250 ⎯ ⎯ * Input over voltage protection will shutdown the output voltage when the input voltage exceeds threshold level. Vdc 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 VIN 36 48 75 Vdc Maximum Input Current IIN,max - - 10 Adc 2 - - 1 As 24 - mAp-p - dB (VIN=0V to 75V, IO=IO, max) Inrush Transient All It Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 12μH source impedance; VIN= 48V, IO= IOmax ; see Figure 9) All - Input Ripple Rejection (120Hz) All 50 2 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 an integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included, however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating of 30 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 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Electrical Specifications (continued) Parameter Output Voltage Set-point (VIN=VIN,nom, IO=15A, Ta =25°C) Device Symbol All VO, set Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) VO Min Typ Max Unit 12 11.4 ⎯ Vdc 12.6 Vdc mV Output Regulation Line (VIN=VIN, min to VIN, max) All ⎯ 24 36 Load (IO=IO, min to IO, max) All ⎯ 360 600 mV Temperature (TA = -40ºC to +85ºC) All ⎯ ⎯ 250 mV RMS (5Hz to 20MHz bandwidth) All ⎯ 33 65 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 100 200 mVpk-pk ⎯ Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max) External Capacitance All CO, max 0 Output Current All Io 0 Output Current Limit Inception All IO, lim ⎯ Efficiency VIN=VIN, nom, TA=25°C IO=IO, max , VO= VO,set All η Switching Frequency (input ripple is ½ fsw) 20,000 μF 25 Adc 30 ⎯ Adc ⎯ 95 ⎯ % fsw ⎯ 300 ⎯ kHz Vpk ts ⎯ __ 550 500 ⎯ __ mVpk μs Vpk ts __ __ 550 500 __ mVpk μs Dynamic Load Response (dIo/dt=1A/10μs; Vin=Vin,nom; TA=25°C; Tested with a 10 μF aluminum and a 1.0 μF tantalum capacitor across the load.) Load Change from Io= 50% to 75% of Io,max: Peak Deviation Settling Time (Vo<10% peak deviation) All Load Change from Io= 75% to 50% of Io,max: Peak Deviation Settling Time (Vo<10% peak deviation) Isolation Specifications Parameter Symbol Min Typ Max Unit Isolation Capacitance Ciso ⎯ 1000 ⎯ pF Isolation Resistance Riso 10 ⎯ ⎯ MΩ Min Typ Max Unit General Specifications Parameter Calculated Reliability Based upon Telcordia SR332 Issue 2: Method I, Case 1, (IO=80%IO, max, TA=40°C, Airflow = 200 lfm), 90% confidence Device MTBF All 2,651,917 Hours FIT All 337.1 10 /Hours 9 Weight – Open Frame ⎯ 49 (1.73) ⎯ g (oz.) Weight – with Baseplate option ⎯ 64 (2.24) ⎯ g (oz.) LINEAGE POWER 3 Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A 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 Remote On/Off Signal Interface (VIN=VIN, min to VIN, max , Signal referenced to VINterminal) Negative Logic: device code suffix “1” Logic Low = module On, Logic High = module Off Positive Logic: No device code suffix required Logic Low = module Off, Logic High = module On Logic Low Specification On/Off Thresholds: Remote On/Off Current – Logic Low All Ion/off 5 10 15 μA Logic Low Voltage All Von/off -0.3 ⎯ 0.8 Vdc Logic High Voltage – (Typ = Open Collector) All Von/off 2.0 ⎯ 3.5 Vdc Logic High maximum allowable leakage current (Von/off = 2.0V) All Ion/off ⎯ ⎯ 4.0 μA Maximum voltage allowed on On/Off pin All Von/off ⎯ ⎯ 13.5 Vdc All Enable with Vin ⎯ 50 ⎯ ms ⎯ 20 ⎯ ms Turn-On Delay and Rise Times (IO=IO, max) Tdelay = Time until VO = 10% of VO,set from either application of Vin with Remote On/Off set to On or operation of Remote On/Off from Off to On with Vin already applied for at least one second. Trise = Time for VO to rise from 10% of VO,set to 90% of VO,set. Tdelay, Tdelay, Enable with All on/off Trise Output Overvoltage Protection (Clamp) All Overtemperature Protection All Tref 40 65 75 ms 13 ⎯ 15 Vdc ⎯ 125 ⎯ °C (See Feature Descriptions) Input Undervoltage Lockout Turn-on Threshold ⎯ 35 36 Vdc Turn-off Threshold 32 34 ⎯ Vdc Input Overvoltage Lockout 4 Turn-off Threshold ⎯ 81 82 Vdc Turn-on Threshold 78 79 ⎯ Vdc LINEAGE POWER Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Characteristic Curves 7 Iout=25A 6 5 Iout=12.5A 4 3 2 Iout=0A 1 0 30 35 40 45 50 55 60 65 70 75 On/Off VOLTAGE 8 VON/OFF (V) (2V/div) INPUT CURRENT, Ii (A) 9 VO (V) (5V/div) 10 OUTPUT VOLTAGE The following figures provide typical characteristics for the QSW025A0B (12V, 25A) at 25ºC. The figures are identical for either positive or negative Remote On/Off logic. INPUT VOLTAGE, VO (V) TIME, t (20 ms/div) Vin=75V Vin=48V Vin=36V 80 75 0 5 10 15 20 OUTPUT CURRENT, IO (A) 25 Figure 2. Typical Converter Efficiency Vs. Output current at Room Temperature. VO (V) (50mV/div) OUTPUT VOLTAGE, 36 Vin 48 Vin 60 Vin TIME, t (1μs/div) Figure 3. Typical Output Ripple and Noise at Room Temperature and Io = Io,max. LINEAGE POWER TIME, t (500 μs/div) Figure 5. Typical Transient Response to Step change in Load from 25% to 50% to 25% of Full Load at Room Temperature and 48 Vdc Input. VO (V) (500mV/div) 85 IO (A) (10A/div) 90 OUTPUT CURRENT OUTPUT VOLTAGE EFFCIENCY, η (%) 95 IO (A) (10A/div) 100 VO (V) (500mV/div) Figure 4. Typical Start-Up Using Remote On/Off, negative logic version shown. OUTPUT CURRENT OUTPUT VOLTAGE Figure 1. Typical Input Characteristic at Room Temperature. TIME, t (500 μs/div) Figure 6. Typical Transient Response to Step Change in Load from 50% to 75% to 50% of Full Load at Room Temperature and 48 Vdc Input. 5 Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Characteristic Curves (continued) . OUTPUT VOLTAGE, VO (V) 12.10 12.05 Iout=0A 12.00 11.95 11.90 Iout=12.5A 11.85 Iout=25A 11.80 11.75 11.70 35 40 45 50 55 60 65 70 75 INPUT VOLTAGE, Vin (V) Figure 7. Typical Output voltage regulation vs. Input voltage at Room Temperature. OUTPUT VOLTAGE, VO (V) 12.10 Vin=36V 12.05 Vin=48V 12.00 11.95 11.90 Vin=75V 11.85 11.80 11.75 11.70 0 5 10 15 20 25 OUTPUT CURRENT, IO (A) Figure 8. Typical Output voltage regulation vs. Output current at Room Temperature. 6 LINEAGE POWER Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Test Configurations Design Considerations Input Source Impedance The power module should be connected to a low ac-impedance source. A highly inductive source impedance can affect the stability of the power module. For the test configuration in Figure 9, a 330μF electrolytic capacitor, Cin, (ESR<0.7Ω at 100kHz), mounted close to the power module helps ensure the stability of the unit. Consult the factory for further application guidelines. Safety Considerations Note: Measure input reflected-ripple current with a simulated source inductance (LTEST) of 12 µH. Capacitor CS offsets possible battery impedance. Measure current as shown above. Figure 9. Input Reflected Ripple Current Test Setup. Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or For safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., UL60950-1, CSA C22.2 No. 60950-1, and VDE EN60950-1. If the input source is non-SELV (ELV or a hazardous voltage greater than 60 Vdc and less than or equal to 75Vdc), for the module’s output to be considered as meeting the requirements for safety extra-low voltage (SELV), all of the following must be true: The input source is to be provided with reinforced insulation from any other hazardous voltages, including the ac mains. One VIN pin and one VOUT pin are to be grounded, or both the input and output pins are to be kept floating. The input pins of the module are not operator accessible. Another SELV reliability test is conducted on the whole system (combination of supply source and subject module), as required by the safety agencies, to verify that under a single fault, hazardous voltages do not appear at the module’s output. tantalum capacitor. Scope measurement should be made using a BNC socket. Position the load between 51 mm and 76 mm (2 in. and 3 in.) from the module. Figure 10. Output Ripple and Noise Test Setup. CONTACT AND DISTRIBUTION LOSSES VI(+) VO1 IO II LOAD SUPPLY VI(–) VO2 CONTACT RESISTANCE Note: Do not ground either of the input pins of the module without grounding one of the output pins. This may allow a non-SELV voltage to appear between the output pins and ground. The power module has safety extra-low voltage (SELV) outputs when all inputs are SELV. The input to these units is to be provided with a maximum 30 A fast-acting (or time-delay) fuse in the unearthed lead. Note: All measurements are taken at the module terminals. When socketing, place Kelvin connections at module terminals to avoid measurement errors due to socket contact resistance. Figure 11. Output Voltage and Efficiency Test Setup. LINEAGE POWER 7 Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Feature Descriptions Output Overvoltage Clamp Overcurrent Protection The output overvoltage clamp consists of a control circuit, independent of the primary regulation loop, that monitors the voltage on the output terminals and clamps the voltage when it exceeds the overvoltage set point. The control loop of the clamp has a higher voltage set point than the primary loop. This provides a redundant voltage control that reduces the risk of output overvoltage. To provide protection in a fault output overload condition, the module is equipped with internal current-limiting circuitry and can endure current limiting for a few miliseconds. If the overcurrent condition persists beyond a few milliseconds, the module will shut down and remain latched off. The overcurrent latch is reset by either cycling the input power or by toggling the on/off pin for one second. If the output overload condition still exists when the module restarts, it will shut down again. This operation will continue indefinitely until the overcurrent condition is corrected. An auto-restart option is also available. An auto-restart feature continually attempts to restore the operation until fault condition is cleared. Overtemperature Protection These modules feature an overtemperature protection circuit to safeguard against thermal damage. The circuit shuts down and latches off the module when the maximum device reference temperature is exceeded. The module can be restarted by cycling the dc input power for at least one second or by toggling the remote on/off signal for at least one second. Remote On/Off Two remote on/off options are available. Positive logic remote on/off turns the module on during a logic-high voltage on the ON/OFF pin, and off during a logic low. Negative logic remote on/off turns the module off during a logic high and on during a logic low. Negative logic, device code suffix "1," is the factory-preferred configuration. The on/off circuit is powered from an internal bias supply. To turn the power module on and off, the user must supply a switch to control the voltage between the on/off terminal and the Vi (-) terminal (Von/off). The switch can be an open collector or equivalent (see Figure 12). A logic low is Von/off = -0.3V to 0.8V. The typical Ion/off during a logic low is 10 µA. The switch should maintain a logic-low voltage while sinking 10µA. During a logic high, the maximum Von/off generated by the power module is 3.5V. The maximum allowable leakage current of the switch at Von/off = 2.0V is 4µA. If using an external voltage source, the maximum voltage V on/off on the pin is 13.5V with respect to the Vi (-) terminal. If not using the remote on/off feature, perform one of the following to turn the unit on: For negative logic, short ON/OFF pin to VI(-). For positive logic: leave ON/OFF pin open. Ion/off + Input Under/Over voltage Lockout At input voltages above or below the input under/over voltage lockout limits, module operation is disabled. The module will begin to operate when the input voltage level changes to within the under and overvoltage lockout limits. Active Load Sharing (Parallel Operation with –P option) For additional power requirements, the power module can be configured for parallel operation with active load sharing. Good layout techniques should be observed for noise immunity when using multiple units in parallel. To implement active load sharing, the following requirements should be followed: • The share pins of all units in parallel must be connected together. The path of these connections should be as direct as possible. Vin(-) is the return for the active share signal for each module; therefore, all modules in parallel must use the same Vin source. The share signal trace should be placed as close to the Vin(-) power plane as possible. • These modules contain circuitry to block reverse current flow upon start-up, when output voltage is present from other parallel modules, eliminating the requirement for external output ORing devices. However, output ORing devices should be used, if fault tolerance is desired in parallel applications. • When using modules in parallel without output ORing devices, the On/Off signal for one module shall be 40mS ahead of the other modules, to allow output voltage to be established, before the remaining modules startup. If using output ORing devices, the 40mS delay is not required. • When not using the parallel feature, leave the share pin open. ON/OFF Von/off – VO(+) LOAD VI(+) VO(–) VI(–) Figure 12. Remote On/Off Implementation. 8 LINEAGE POWER Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Feature Descriptions (continued) Thermal Considerations The power modules operate in a variety of thermal environments and sufficient cooling should be provided to help ensure reliable operation. Thermal 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. Heat-dissipating components are mounted on the top side of the module. Heat is removed by conduction, convection and radiation to the surrounding environment. Proper cooling can be verified by measuring the thermal reference temperature (THx). Peak temperature (THx) occurs at the position indicated in Figure 13. For reliable operation this temperature should not exceed the listed temperature threshold. temperature to a lower value for extremely high reliability. 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. Heat Transfer via Convection Increased airflow over the module enhances the heat transfer via convection. The thermal derating figures (15-24) show the maximum output current that can be delivered by each module in the respective orientation without exceeding the maximum THx temperature versus local ambient temperature (TA) for air flows of, Natural Convection, 1 m/s (200 ft./min), 2 m/s (400 ft./min) and 3 m/s (600 ft./min). The use of Figures 15 - 24 are shown in the following example: Example What is the minimum airflow necessary for a QSW025A0B operating at VI = 48 V, an output current of 17A, and a maximum ambient temperature of 70 °C in transverse orientation. Solution: Given: Vin= 48V, IO = 17A, TA = 70 °C Determine required airflow (V) (Use Figure 15): V = 1.5 m/sec. (300LFM) or greater. TH1 and TH2 shall not exceed 125°C. Figure 13. Location of the thermal reference temperature TH. TH3 shall not exceed 110°C. Figure 14. Location of the thermal reference temperature TH3 for Baseplate module. The output power of the module should not exceed the rated power for the module as listed in the Ordering Information table. Although the maximum THx temperature of the power modules is 110 °C - 125 °C, you can limit this LINEAGE POWER 9 Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Feature Descriptions (continued) 3.0 m/s (600LFM) 25 20 15 NC 1.0 m/s (200LFM) 1.5 m/s (300LFM) 10 5 2.0 m/s (400LFM) 30 OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A) 30 20 30 40 50 60 70 80 20 NC 15 1.0 m/s (200LFM) 10 5 20 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 15. Output Current Derating for the Open Frame QSW025A0B in the Transverse Orientation; Airflow Direction from Vin(+) to Vin(-); Vin = 48V. 1.5 m/s (300LFM) 2.0 m/s (400LFM) 20 15 NC 10 1.0 m/s (200LFM) 5 40 50 60 70 80 1.5 m/s (300LFM) 2.0 m/s (400LFM) 30 OUTPUT CURRENT, IO (A) 3.0 m/s (600LFM) 25 30 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 18. Output Current Derating for the QSW025A0B-H in the Transverse Orientation with baseplate and 0.5-inch high heatsink; Airflow Direction from Vin(+) to Vin(–); Vin = 48V. 30 OUTPUT CURRENT, IO (A) 25 0 0 3.0 m/s (600LFM) 25 20 NC 15 1.0 m/s (200LFM) 1.5 m/s (300LFM) 2.0 m/s (400LFM) 10 5 0 0 20 30 40 50 60 70 80 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 16. Output Current Derating for the QSW025A0B-H in the Transverse Orientation with baseplate; Airflow Direction from Vin(+) to Vin(–); Vin = 48V. 30 OUTPUT CURRENT, IO (A) 3.0 m/s (600LFM) 20 30 40 50 60 70 80 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 19. Output Current Derating for the QSW025A0B-H in the Transverse Orientation with baseplate and 1.0-inch high heatsink; Airflow Direction from Vin(+) to Vin(–); Vin = 48V. 3.0 m/s (600LFM) 25 20 15 NC 1.0 m/s (200LFM) 10 5 1.5 m/s (300LFM) 2.0 m/s (400LFM) 0 20 30 40 50 60 70 80 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 17. Output Current Derating for the QSW025A0B-H in the Transverse Orientation with baseplate and 0.25-inch high heatsink; Airflow Direction from Vin(+) to Vin(–); Vin = 48V. 10 LINEAGE POWER Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Feature Descriptions (continued) 30 25 3.0 m/s (600LFM) 20 15 NC 1.0 m/s (200LFM) 10 1.5 m/s (300LFM) 5 0 20 30 40 50 2.0 m/s (400LFM) 60 70 80 OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A) 30 1.0 m/s (200LFM) 10 1.5 m/s (300LFM) 5 2.0 m/s (400LFM) 30 40 50 60 70 80 30 25 3.0 m/s (600LFM) 20 15 NC 1.0 m/s (200LFM) 1.5 m/s (300LFM) 2.0 m/s (400LFM) 10 5 0 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 23. Output Current Derating for the QSW025A0B-H in the Longitudinal Orientation with baseplate and 0.5-inch high heatsink; Airflow Direction from Vout to Vin; Vin = 48V. OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A) NC 15 20 30 3.0 m/s (600LFM) 25 20 NC 15 1.0 m/s (200LFM) 10 1.5 m/s (300LFM) 5 2.0 m/s (400LFM) 0 20 30 40 50 60 70 80 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 21. Output Current Derating for the QSW025A0B-H in the Longitudinal Orientation with baseplate; Airflow Direction from Vout to Vin; Vin = 48V. 30 OUTPUT CURRENT, IO (A) 20 0 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 20. Output Current Derating for the Open Frame QSW025A0B in the Longitudinal Orientation; Airflow Direction from Vout to Vin; Vin = 48V. 3.0 m/s (600LFM) 25 20 30 40 50 60 70 80 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 24. Output Current Derating for the QSW025A0B-H in the Longitudinal Orientation with baseplate and 1.0-inch high heatsink; Airflow Direction from Vout to Vin; Vin = 48V. 3.0 m/s (600LFM) 25 20 NC 15 1.0 m/s (200LFM) 10 5 1.5 m/s (300LFM) 2.0 m/s (400LFM) 0 20 30 40 50 60 70 80 90 LOCAL AMBIENT TEMPERATURE, TA (°C) Figure 22. Output Current Derating for the QSW025A0B-H in the Longitudinal Orientation with baseplate and 0.25-inch high heatsink; Airflow Direction from Vout to Vin; Vin = 48V. LINEAGE POWER 11 Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Layout Considerations The QSW025 power module series are low profile in order to be used in fine pitch system card architectures. As such, component clearance between the bottom of the power module and the mounting board is limited. Avoid placing copper areas on the outer layer directly underneath the power module. Also avoid placing via interconnects underneath the power module. For additional layout guide-lines, refer to FLTR100V10 Data Sheet. Through-Hole Lead-Free Soldering Information The RoHS-compliant, Z version, through-hole products use the SAC (Sn/Ag/Cu) Pb-free solder and RoHScompliant components. The non-Z version products use lead-tin (Pb/Sn) solder and RoHS-compliant components. Both version modules are designed to be processed through single or dual wave soldering machines. The pins have an RoHS-compliant, pure tin finish that is compatible with both Pb and Pb-free wave 12 soldering processes. A maximum preheat rate of 3°C/s is suggested. The wave preheat process should be such that the temperature of the power module board is kept below 210°C. For Pb solder, the recommended pot temperature is 260°C, while the Pb-free solder pot is 270°C max. Not all RoHS-compliant through-hole products can be processed with paste-through-hole Pb or Pb-free reflow process. If additional information is needed, please consult with your Lineage Power representative for more details. 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 Lineage Power Board Mounted Power Modules: Soldering and Cleaning Application Note (AP01-056EPS). LINEAGE POWER Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Mechanical Outline for QSW025A0B Through-hole Module 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* SIDE VIEW BOTTOM VIEW *Top side label includes Lineage Power name, product designation, and data code. ** Standard pin tail length. Optional pin tail lengths shown in Table 2, Device Options. †Option Feature, pin is not present unless one these options specified. LINEAGE POWER 13 Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Mechanical Outline for QSW025A0B–H (Baseplate version) Through-hole Module 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 SIDE VIEW BOTTOM VIEW* *Bottom side label includes Lineage Power name, product designation, and data code. ** Standard pin tail length. Optional pin tail lengths shown in Table 2, Device Options. †Option Feature, pin is not present unless one of these options is specified. 14 LINEAGE POWER Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Recommended Pad Layout for Through-Hole Modules 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.) 3.6 (.14) 7.62 10.8 (.300) 3.81 (.43) (.150) 11.43 (.450) 36.8 (1.45) 15.24 (.600) 50.80 (2.000) VI(+) Vo (+) †PARALLEL 15.24 (.600) ON/OFF † CASE Vo (-) VI (-) 1.02 (.040) DIA PIN, 5 PLCS 1.57 (.062) DIA PIN, 2 PLCS 57.9 (2.28) †Option Feature, pin is not present unless one of these options is specified. LINEAGE POWER 15 Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current Ordering Information Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 1. Device Codes Input Voltage Output Voltage Output Current Efficiency Connector Type Comcodes QSW025A0B1Z 48V (36−75Vdc) 12V 25A 95% Through hole CC109148350 QSW025A0B41Z 48V (36−75Vdc) 12V 25A 95% Through hole CC109148383 QSW025A0B1-HZ 48V (36−75Vdc) 12V 25A 95% Through hole CC109148342 QSW025A0B41-H 48V (36−75Vdc) 12V 25A 95% Through hole CC109148367 QSW025A0B41-HZ 48V (36−75Vdc) 12V 25A 95% Through hole CC109148375 QSW025A0B641-HZ 48V (36−75Vdc) 12V 25A 95% Through hole CC109148391 QSW025A0B741-HZ 48V (36−75Vdc) 12V 25A 95% Through hole CC109148400 QSW025A0B41-PHZ 48V (36−75Vdc) 12V 25A 95% Through hole CC109148037 Product codes Table 2. Device Options Option Negative remote on/off logic Suffix 1 Auto-restart 4 Pin length 6.35 ± 0.25mm (0.250 ± 0.010 in.) 5 Pin length 3.68 ± 0.25mm (0.145 ± 0.010 in.) 6 Case ground pin (offered with baseplate option only) 7 Pin length 2.79 ± 0.25mm (0.110 ± 0.010 in.) 8 Baseplate option -H Active load sharing (Parallel Operation) -P RoHS compliant modules -Z 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: +49 898 780 672 80 India Headquarters Tel: +91 80 28411633 Lineage Power reserves the right to m ake changes to t he product(s) or inf ormation 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 Pow er C orporation, (Mesquite, Texas) All I nternational Rights Res erved. Document No: DS08-008 ver 1.1 PDF Name: QSW025A0B_ds.pdf