Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current BARRACUDA SERIES™ Features RoHS Compliant Applications Distributed power architectures Intermediate bus voltage applications Servers and storage applications Networking equipment including Power over Ethernet (PoE) Fan assemblies and other systems requiring a tightly regulated output voltage Options Negative Remote On/Off logic (1=option code, factory preferred) Auto-restart after fault shutdown (4=option code, factory preferred) Remote Sense and Output Voltage Trim (9=option code) Base plate option (-H=option code) Passive Droop Load Sharing (-P=option code) Compliant to RoHS EU Directive 2002/95/EC (-Z versions) High and flat efficiency profile – >95.5% at 12Vdc, 40% load to 100% output Wide Input voltage range: 36-75Vdc Delivers up to 25Adc output current Fully very tightly regulated output voltage Low output ripple and noise Industry standard, DOSA Compliant Quarter brick: 58.4 mm x 36.8 mm x 11.7 mm (2.30 in x 1.45 in x 0.46 in) Constant switching frequency Positive Remote On/Off logic Output over current/voltage protection Over temperature protection Wide operating temperature range (-40°C to 85°C) UL* 60950-1, 2nd Ed. Recognized, CSA† C22.2 No. 60950-1-07 Certified, and VDE‡ (EN60950-1, 2nd Ed.) Licensed § CE mark to 2006/96/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 and ISO14001 certified manufacturing facilities Description The QBVW025A0B series of dc-dc converters are a new generation of fully regulated DC/DC power modules designed to support 12Vdc intermediate bus applications where multiple low voltages are subsequently generated using point of load (POL) converters, as well as other application requiring a tightly regulated output voltage. The QBVW025A0B series operate from an input voltage range of 36 to 75Vdc and provide up to 25A output current at output voltages of 12Vdc in an industry standard, DOSA compliant quarter brick. The converter incorporates digital control, synchronous rectification technology, a fully regulated control topology, and innovative packaging techniques to achieve efficiency exceeding 96% at 12V output. This leads to lower power dissipations such that for many applications a heat sink is not required. Standard features include on/off control, output overcurrent and over voltage protection, over temperature protection, input under and over voltage lockout. 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. IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers, Incorporated. ISO is a registered trademark of the International Organization of Standards. Document No: ds11-002 ver 1.3 PDF Name: QBVW025A0B.pdf Data Sheet May 16, 2012 QBVW025A0B 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 Max Unit VIN -0.3 75 Vdc 100 Vdc VIN 80 100 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 Input Voltage* Continuous Operating transient ≤ 100mS Non- operating 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 Operating Input Voltage Maximum Input Current (VIN=0V to 75V, IO=IO, max) Input No Load Current (VIN = VIN, nom, IO = 0, module enabled) Input Stand-by Current (VIN = VIN, nom, module disabled) External Input Capacitance Symbol Min Typ Max Unit VIN 36 48 75 Vdc IIN,max - - 9 Adc All IIN,No load All IIN,stand-by All 2 It 80 mA 22 mA 100 - - μF - - 1 As 2 Inrush Transient All Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 12μH source impedance; VIN= 48V, IO= IOmax ; see Figure 11) All - 40 - mAp-p Input Ripple Rejection (120Hz) All - 25 - 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 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 in the ungrounded input lead of the power supply (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. Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit All VO, set 11.97 12.00 12.03 Vdc All w/o -P VO 11.76 12.24 Vdc -P Option VO 11.68 12.32 Vdc All VO 11.15 Vdc Output Voltage Set-point (VIN=VIN,nom, IO=12.5A, TA =25°C) Output Voltage (Over all operating input voltage (40V to 75V), resistive load, and temperature conditions until end of life) Output Voltage (VIN=36V, TA = 25ºC) Output Regulation[VIN, min = 40V] All 0.2 % VO, set Load (IO=IO, min to IO, max) All w/o -P 0.2 % VO, set Load (IO=IO, min to IO, max), Intentional Droop -P Option Line (VIN= VIN, min to VIN, max) 0.40 All RMS (5Hz to 20MHz bandwidth) All Peak-to-Peak (5Hz to 20MHz bandwidth) All Temperature (TA = -40ºC to +85ºC) Vdc 2 70 mVrms 200 mVpk-pk 0 % VO, set Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max) External Output Capacitance For CO >5000uF, IO must be < 50% IO, max during Trise. All CO, max 10,000 μF Output Current All IO 0 Output Current Limit Inception All IO, lim IO=100% IO, max , VO= VO,set All η 96.0 % IO=40% IO, max to 100% IO, max , VO= VO,set All η 95.5 % fsw 150 kHz 30 25 Adc Adc Efficiency VIN=VIN, nom, TA=25°C Switching Frequency Dynamic Load Response dIO/dt=1A/10s; Vin=Vin,nom; TA=25°C; (Tested with a 1.0μF ceramic, a 10μF tantalum, and 470μF capacitor and 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) Vpk ts __ 300 700 __ mVpk s Vpk ts __ __ 300 700 __ mVpk s Isolation Specifications Parameter Symbol Min Typ Max Unit Isolation Capacitance Ciso 1000 pF Isolation Resistance Riso 10 MΩ General Specifications Parameter Typ Unit MTBF All 3,598,391 Hours FIT All 277.9 10 /Hours Weight – Open Frame 47.4 (1.67) g (oz.) Weight – with Base plate option 66.4 (2.34) g (oz.) Calculated Reliability Based upon Telcordia SR-332 Issue 2: Method I, Case 1, (IO=80%IO, max, TA=40°C, Airflow = 200 lfm), 90% confidence LINEAGE POWER Device 9 3 Data Sheet May 16, 2012 QBVW025A0B 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 (Vin =100V) All Ion/off 280 310 μA Logic Low Voltage All Von/off -0.3 0.8 Vdc Logic High Voltage – (Typ = Open Collector) All Von/off 2.0 14.5 Vdc Logic High maximum allowable leakage current (Von/off = 2.0V) All Ion/off 10 μA Maximum voltage allowed on On/Off pin All Von/off 14.5 Vdc All w/o “P’ option All w/o “P” option All w/ “P’ option All w/ “P” option All w/o “P” option All w/ “P’ option Tdelay Enable 150 ms Tdelay, Enable 10 ms Tdelay, Enable 180* ms Tdelay, Enable 40* ms Trise 15 ms Trise 300* ms 3 A 0.5 Vdc 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 (Enable with Vin); or operation of Remote On/Off from Off to On with Vin already applied for at least 150 milliseconds (Enable with on/off). * Increased Tdelay due to startup for parallel modules. Trise=Time for VO to rise from 10% to 90% of VO,set, For CO >5000uF, IO must be < 50% IO, max during Trise. * Increased Trise when pre-bias Vo exists at startup for parallel modules. Load Sharing Current Balance (difference in output current across all modules with outputs in parallel, no load to full load) -P Option All w/ ”9” option All w/ ”9” option All w/o “9” option All w/ ”9” option , with Vin with on/off with Vin with on/off Idiff VSense VO, set 8.1 13.2 Vdc VO,limit 14.5 17.0 Vdc VO,limit VO,set+2.5V VO,set+5.0V Vdc Tref 140 °C Turn-on Threshold (Default) 33 35 36 Vdc Turn-off Threshold (Default) 31 33 34 Vdc Remote Sense Range Output Voltage Adjustment range Output Overvoltage Protection Overtemperature Protection (See Feature Descriptions) All Input Undervoltage Lockout Input Overvoltage Lockout Turn-off Threshold (Default) 86 Vdc Turn-on Threshold (Default) 76 79 Vdc LINEAGE POWER 4 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Characteristic Curves, 12Vdc Output EFFCIENCY, η (%) INPUT CURRENT, Ii (A) The following figures provide typical characteristics for the QBVW025A0B (12V, 25A) at 25ºC. The figures are identical for either positive or negative Remote On/Off logic. INPUT VOLTAGE, VO (V) TIME, t (2s/div) Figure 4. Typical Transient Response to 0.1A/µs Step Change in Load from 50% to 75% to 50% of Full Load, Co=470µF and 48 Vdc Input. OUTPUT VOLTAGE VO (V) (5V/div) TIME, t (20 ms/div) Figure 5. Typical Start-Up Using Vin with Remote On/Off enabled, negative logic version shown. LINEAGE POWER TIME, t (500 μs/div) On/Off VOLTAGE VON/OFF (V)(2V/div) OUTPUT VOLTAGE INPUT VOLTAGE VIN(V) (20V/div) VO (V) (5V/div) Figure 3. Typical Output Ripple and Noise, Io = Io,max. OUTPUT CURRENT, IO (A) Figure 2. Typical Converter Efficiency Vs. Output Current. OUTPUT CURRENT OUTPUT VOLTAGE IO (A) (5A/div) VO (V) (200mV/div) OUTPUT VOLTAGE, VO (V) (50mV/div) Figure 1. Typical Input Characteristic. TIME, t (5 ms/div) Figure 6. Typical Start-Up Using Remote On/Off with Vin applied, negative logic version shown. 5 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current OUTPUT VOLTAGE, VO (V) OUTPUT VOLTAGE, VO (V) Characteristic Curves, 12Vdc Output (continued) INPUT VOLTAGE, Vin (V) OUTPUT CURRENT, IO (A) Figure 8. Typical Output Voltage Regulation vs. Output Current . OUTPUT VOLTAGE, VO (V) Figure 7. Typical Output Voltage Regulation vs. Input Voltage. OUTPUT CURRENT, IO (A) Figure 9. Typical Output Voltage regulation vs. Input Voltage for the –P Option. Figure 10. Typical Output Voltage Regulation vs. Output Current for the –P Option. . LINEAGE POWER 6 Data Sheet May 16, 2012 QBVW025A0B 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. Highly inductive source impedance can affect the stability of the power module. For the test configuration in Figure 11, a 100μF electrolytic capacitor, Cin, (ESR<0.7 at 100kHz), mounted close to the power module helps ensure the stability of the unit. 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 11. Input Reflected Ripple Current Test Setup. Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or 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 12. Output Ripple and Noise Test Setup. CONTACT AND DISTRIBUTION LOSSES VI(+) VO1 IO II LOAD SUPPLY VI(–) 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., nd nd UL60950-1 2 Ed., CSA C22.2 No. 60950-1 2 Ed., and nd VDE0805-1 EN60950-1 2 Ed. 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. 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 ungrounded input lead. VO2 CONTACT RESISTANCE 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 13. Output Voltage and Efficiency Test Setup. LINEAGE POWER 7 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Feature Descriptions Overcurrent Protection To provide protection in a fault output overload condition, the module is equipped with internal current-limiting circuitry and can endure current limiting continuously. If the overcurrent condition causes the output voltage to fall greater than 4.0V from Vo,set, 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. A factory configured auto-restart option (with overcurrent and overvoltage auto-restart managed as a group) is also available. An auto-restart feature continually attempts to restore the operation until fault condition is cleared. Remote On/Off The module contains a standard on/off control circuit reference to the VIN(-) terminal. Two factory configured remote on/off logic 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, derived from the input voltage terminals. 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 VIN(-) terminal (Von/off). The switch can be an open collector or equivalent (see Figure 14). A logic low is Von/off = -0.3V to 0.8V. The typical Ion/off during a logic low (Vin=48V, On/Off Terminal=0.3V) is 147µA. The switch should maintain a logic-low voltage while sinking 310µA. During a logic high, the maximum Von/off generated by the power module is 8.2V. The maximum allowable leakage current of the switch at Von/off = 2.0V is TBDµA. If using an external voltage source, the maximum voltage Von/off on the pin is 14.5V with respect to the VIN(-) 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 VIN(-). For positive logic: leave ON/OFF pin open. Figure 14. Remote On/Off Implementation. Output Overvoltage Protection The module contains circuitry to detect and respond to output overvoltage conditions. If the overvoltage condition LINEAGE POWER causes the output voltage to rise above the limit in the Specifications Table, the module will shut down and remain latched off. The overvoltage latch is reset by either cycling the input power, or by toggling the on/off pin for one second. If the output overvoltage condition still exists when the module restarts, it will shut down again. This operation will continue indefinitely until the overvoltage condition is corrected. A factory configured auto-restart option (with overcurrent and overvoltage auto-restart managed as a group) 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 the module when the maximum device reference temperature is exceeded. The module will automatically restart once the reference temperature cools by ~25°C. 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. Load Sharing For higher power requirements, the QBVW025A0 power module offers an optional feature for parallel operation (-P Option code). This feature provides a precise forced output voltage load regulation droop characteristic. The output set point and droop slope are factory calibrated to insure optimum matching of multiple modules’ load regulation characteristics. To implement load sharing, the following requirements should be followed: The VOUT(+) and VOUT(-) pins of all parallel modules must be connected together. Balance the trace resistance for each module’s path to the output power planes, to insure best load sharing and operating temperature balance. VIN must remain between 40Vdc and 75Vdc for droop sharing to be functional. These modules contain means to block reverse current flow upon start-up, when output voltage is present from other parallel modules, thus eliminating the requirement for external output ORing devices. Modules with the –P option will self determine the presence of voltage on the output from other operating modules, and automatically increase its Turn On delay, Tdelay, as specified in the Feature Specifications Table. When parallel modules startup into a pre-biased output, e.g. partially discharged output capacitance, the Trise is automatically increased, as specified in the Feature Specifications Table, to insure graceful startup. Insure that the load is <50% IO,MAX (for a single module) until all parallel modules have started (load full start > module Tdelay time max + Trise time). If fault tolerance is desired in parallel applications, output ORing devices should be used to prevent a single module failure from collapsing the load bus. 8 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current The following equation determines the required external resistor value to obtain a percentage output voltage change of ∆% Feature Descriptions (continued) Remote Sense (9 Option Code) Remote sense minimizes the effects of distribution losses by regulating the voltage at the remote-sense connections (See Figure 15). The SENSE(-) pin should be always connected to VO(–).The voltage between the remote-sense pins and the output terminals must not exceed the output voltage sense range given in the Feature Specifications table: [VO(+) – VO(–)] – [SENSE(+) ] 0.5 V Although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. The maximum increase is the larger of either the remote sense or the trim. The amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. When using remote sense and trim, 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 (Maximum rated power = Vo,set x Io,max). 511 R trim down 10 . 22 % V V desired 100 % o , set V o , set Where For example, to trim-down the output voltage of the 12V nominal module by 20% to 9.6V, Rtrim-down is calculated as follows: % 20 511 Rtrim down 10 .22 20 Rtrim down 15 .3 k Connecting an external resistor (Rtrim-up) between the TRIM pin and the VO(+) (or Sense (+)) pin increases the output voltage set point. The following equations determine the required external resistor value to obtain a percentage output voltage change of ∆%: 5 .11 Vo , set (100 %) 511 10 .22 Rtrim up 1 .225 % % V V o , set % desired V o , set Where 100 For example, to trim-up the output voltage of the 12V module by 5% to 12.6V, Rtrim-up is calculated is as follows: % 5 Figure 15. Circuit Configuration for remote sense. R trim up 5 . 11 12 . 0 (100 5 ) 511 10 . 22 1 . 225 5 5 Rtrim up 938 .8 Trim, Output Voltage Adjust (9 Option Code) Trimming allows the output voltage set point to be increased or decreased; this is accomplished by connecting an external resistor between the TRIM pin and either the VO(+) pin or the VO(-) pin. VO(+) Rtrim-up QBVW033A0 LOAD TRIM Rtrim-down VO(-) Figure 16. Circuit Configuration to Trim Output Voltage. Connecting an external resistor (Rtrim-down) between the TRIM pin and the Vo(-) (or Sense(-)) pin decreases the output voltage set point. To maintain set point accuracy, the trim resistor tolerance should be ±1.0%. LINEAGE POWER The voltage between the Vo(+) and Vo(–) terminals must not exceed the minimum output overvoltage protection value shown in the Feature Specifications table. This limit includes any increase in voltage due to remote-sense compensation and output voltage set-point adjustment trim. Although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. The maximum increase is the larger of either the remote sense or the trim. The amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. When using remote sense and trim, 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 (Maximum rated power = VO,set x IO,max). 9 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Feature Descriptions (continued) Heat Transfer via Convection Thermal Considerations Increased airflow over the module enhances the heat transfer via convection. The thermal derating of figure 1923 shows the maximum output current that can be delivered by each module in the indicated 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). The use of Figure 19is shown in the following example: Example What is the minimum airflow necessary for a QBVW025A0B operating at VI = 48 V, an output current of 20A, and a maximum ambient temperature of 70 °C in transverse orientation. Solution: Given: Vin= 48V, IO = 20A, TA = 60 °C Determine required airflow (V) (Use Figure 19: V = 0.5m/s (100 LFM) or greater. OUTPUT CURRENT, IO (A) 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 (TH1 or TH2). Peak temperature occurs at the position indicated in Figure 17 and 18. For reliable operation this temperature should not exceed TH1=125°C or TH2=105°C. For extremely high reliability you can limit this temperature to a lower value. Figure 18. Location of the thermal reference temperature TH3 for Base plate module. The output power of the module should not exceed the rated power for the module as listed in the Ordering Information table. Please refer to the Application Note “Thermal Characterization Process For Open-Frame Board-Mounted Power Modules” for a detailed discussion of thermal aspects including maximum device temperatures. LINEAGE POWER LOCAL AMBIENT TEMPERATURE, TA (C) Figure 19. Output Current Derating for the Open Frame QBVW025A0B in the Transverse Orientation; Airflow Direction from Vin(+) to Vin(-); Vin = 48V. OUTPUT CURRENT, IO (A) . Figure 17. Location of the thermal reference temperature TH. LOCAL AMBIENT TEMPERATURE, TA (C) Figure 20. Output Current Derating for the Base plate QBVW025A0B-H in the Transverse Orientation; Airflow Direction from Vin(+) to Vin(-); Vin = 48V. 10 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current OUTPUT CURRENT, IO (A) Layout Considerations OUTPUT CURRENT, IO (A) LOCAL AMBIENT TEMPERATURE, TA (C) Figure 21. Output Current Derating for the Base plate QBVW025A0B-H with 0.25” heatsink in the Transverse Orientation; Airflow Direction from Vin(+) to Vin(-); Vin = 48V. OUTPUT CURRENT, IO (A) LOCAL AMBIENT TEMPERATURE, TA (C) Figure 22. Output Current Derating for the Base plate QBVW025A0B-H with 0.5” heatsink in the Transverse Orientation; Airflow Direction from Vin(+) to Vin(-); Vin = 48V. LOCAL AMBIENT TEMPERATURE, TA (C) Figure 23. Output Current Derating for the Base plate QBVW025A0B-H with 1.0” heatsink in the Transverse Orientation; Airflow Direction from Vin(+) to Vin(-); Vin = 48V. LINEAGE POWER The QBVW025 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 RoHS-compliant components. The module is designed to be processed through single or dual wave soldering machines. The pins have a RoHScompliant, pure tin finish that is compatible with both Pb and Pb-free wave soldering processes. A maximum preheat rate of 3C/s is suggested. The wave preheat process should be such that the temperature of the power module board is kept below 210C. For Pb solder, the recommended pot temperature is 260C, while the Pb-free solder pot is 270C max. Reflow Lead-Free Soldering Information The RoHS-compliant through-hole products can be processed with following paste-through-hole Pb or Pb-free reflow process. Max. sustain temperature : 245C (J-STD-020C Table 4-2: Packaging 3 Thickness>=2.5mm / Volume > 2000mm ), Peak temperature over 245C is not suggested due to the potential reliability risk of components under continuous high-temperature. Min. sustain duration above 217C : 90 seconds Min. sustain duration above 180C : 150 seconds Max. heat up rate: 3C/sec Max. cool down rate: 4C/sec In compliance with JEDEC J-STD-020C spec for 2 times reflow requirement. Pb-free Reflow Profile BMP module 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. BMP will comply with JEDEC J-STD020C specification for 3 times reflow requirement. 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 24. 11 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Reflow Lead-Free Soldering Information (continued) Peak Temp. 240-245°C Ramp down max. 4°C/Sec 217°C 200°C Time Limited 90 Sec. above 217°C 150°C Preheat time 100-150 Sec. Ramp up max. 3°C/Sec 25°C Time Figure 24. Recommended linear reflow profile using Sn/Ag/Cu solder. MSL Rating The QBVW025A0B modules have a MSL rating of 2a. Storage and Handling The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of 30°C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40° C, < 90% relative humidity. Post Solder Cleaning and Drying Considerations Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Lineage Power Board Mounted Power Modules: Soldering and Cleaning Application Note (AP01-056EPS). If additional information is needed, please consult with your Lineage Power representative for more details. EMC Considerations The circuit and plots in Figure 25 shows a suggested configuration to meet the conducted emission limits of EN55022 Class A. For further information on designing for EMC compliance, please refer to the FLTR100V10 data sheet. Figure 25. EMC Considerations LINEAGE POWER 12 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Mechanical Outline for QBVW025A0B 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 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. TOP VIEW* SIDE VIEW BOTTOM VIEW Pin Pin Number Name 1* VIN(+) 2* ON/OFF 3* VIN(‐) 4* VOUT(‐) 5† SENSE(‐) 6† TRIM 7† SENSE(+) 8* VOUT(+) † - Optional Pins See Table 2 LINEAGE POWER 13 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Mechanical Outline for QBVW025A0B–H (Base plate) 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.] *Side label includes product designation, and data code. ** Standard pin tail length. Optional pin tail lengths shown in Table 2, Device Options. ***Bottom label includes Lineage Power name, product designation, and data code TOP VIEW SIDE VIEW* BOTTOM VIEW*** Pin Pin Number Name 1* VIN(+) 2* ON/OFF 3* VIN(‐) 4* VOUT(‐) 5† SENSE(‐) 6† TRIM 7† SENSE(+) 8* VOUT(+) † - Optional Pins See Table 2 LINEAGE POWER 14 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Recommended Pad Layouts 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.) Through-Hole Modules Pin Pin Number Name 1* VIN(+) 2* ON/OFF 3* VIN(‐) 4* VOUT(‐) 5† SENSE(‐) 6† TRIM 7† SENSE(+) 8* VOUT(+) † - Optional Pins See Table 2 LINEAGE POWER 15 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Packaging Details All versions of the QBVW025A0B are supplied as standard in the plastic trays shown in Figure 26. Tray Specification Material Max surface resistivity Color Capacity Min order quantity Each tray contains a total of 12 power modules. The trays are self-stacking and each shipping box for the QBVW025A0B module contains 2 full trays plus one empty hold-down tray giving a total number of 24 power modules. PET (1mm) 9 11 10 -10 /PET Clear 12 power modules 24 pcs (1 box of 2 full trays + 1 empty top tray) Open Frame Module Tray Base Plate Module Tray Figure 26. QBVW025 Packaging Tray LINEAGE POWER 16 Data Sheet May 16, 2012 QBVW025A0B 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 Product codes QBVW025A0BZ QBVW025A0B1Z QBVW025A0B41Z QBVW025A0B61Z QBVW025A0B64Z QBVW025A0B641Z QBVW025A0B841Z QBVW025A0B964Z QBVW025A0B1-HZ QBVW025A0B41-HZ QBVW025A0B51-HZ QBVW025A0B61-HZ QBVW025A0B641-HZ QBVW025A0B941-HZ QBVW025A0B-PHZ QBVW025A0B1-PHZ QBVW025A0B41-PHZ QBVW025A0B641-PHZ LINEAGE POWER Input Voltage 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) 48V (3675Vdc) Output Voltage 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V Output Current 25A 25A 25A 25A 25A 25A 25A 25A 25A 25A 25A 25A 25A 25A 25A 25A 25A 25A Efficiency 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% 96.0% Connector Type Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Through hole Comcodes CC109167796 CC109167383 CC109166195 CC109167391 CC109169875 CC109166204 CC109168407 CC109173167 CC109167400 CC109166798 CC109167417 CC109167821 CC109166815 150020599 CC109170065 CC109167425 CC109167433 CC109173092 17 Data Sheet May 16, 2012 QBVW025A0B Series Power Modules; DC-DC Converters 36-75Vdc Input; 12Vdc Output; 25A Output Current Table 2. Device Options Asia-Pacific Headquarters Tel: +86.021.54279977*808 World Wide Headquarters Lineage Power Corporation 601 Shiloh Road, Plano, TX 75074, USA +1-888-LINEAGE(546-3243) (Outside U.S.A.: +1-972-244-WATT(9288)) www.lineagepower.com e-mail: [email protected] Europe, Middle-East and Africa Headquarters Tel: +49.89.878067-280 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. Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents. © 2010 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved. Document No: ds11-002 ver 1.3 PDF Name: QBVW025A0B.pdf