Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Features  Compliant to RoHS EU Directive 2011/65/EU (-Z versions)  Compliant to REACH Directive (EC) No 1907/2006  Compatible with reflow pin/paste soldering process  High efficiency – 95% at 12Vdc, 50% load to 100% load  Wide Input voltage range: 36-75Vdc output current  Delivers up to 35Adc  Output Voltage adjust: 6.0V to 13.2V dc dc  Tightly regulated output voltage  Low output ripple and noise RoHS Compliant  Industry standard, DOSA compliant, Quarter brick: Applications 58.4mm x 36.8 mm x 10.7 mm (2.30in x 1.45 in x 0.42 in)  Distributed power architectures  Constant switching frequency  Intermediate bus voltage applications  Positive Remote On/Off logic  Servers and storage applications  Output over current/voltage protection  Networking equipment including Power over Ethernet  Over temperature protection (PoE)  Wide operating temperature range (-40°C to 85°C)  Fan assemblies other systems requiring a tightly †  UL* 60950-1, 2nd Ed. Recognized, CSA C22.2 No. regulated output voltage ‡ 60950-1-07 Certified, and VDE (EN60950-1, 2nd Ed.) Licensed Options §  CE mark 73/23/EEC and 93/68/EEC directives  Meets the voltage and current requirements for ETSI 300-  Negative Remote On/Off logic (1=option code, factory 132-2 and complies with and licensed for Basic insulation preferred) rating per EN60950-1  Auto-restart after fault shutdown (4=option code,  2250 Vdc Isolation tested in compliance with IEEE 802.3af factory preferred) PoE standards  Remote Sense and Output Voltage Trim (9=option  ISO** 9001 and ISO14001 certified manufacturing facilities code)  Base plate option (-H=option code)  Passive Droop Load Sharing (-P=option code) Higher  Output Capacitance (-Q=option code) Description The QSVW035A0B Barracuda series of dc-dc converters are a new generation of DC/DC power modules designed to support 9.6 - 12V intermediate bus applications where multiple low voltages are subsequently generated using point of load (POL) dc converters, as well as other application requiring a tightly regulated output voltage. The QSVW035A0B series operate from an input voltage range of 36 to 75V , and provide up to 35A output current at output voltages from 6.0V to 12.0V . The 12V dc dc dc output is well regulated for the entire input voltage range. The QSVW035A0B has improved line transient performance as compared to earlier generation modules. The converter incorporates digital control, synchronous rectification technology, and innovative packaging techniques to achieve efficiency reaching 96% peak at 12Vdc output. This leads to lower power dissipations such that for many applications a heat sink is not required. Standard features include output voltage trim, remote sense, 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. Built-in filtering for both input and output minimizes the need for external filtering. * Trademark of General Electric Company # 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. December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 1 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A 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 Input Voltage* Continuous VIN -0.3 75 Vdc Operating transient ≤ 100mS 100 V dc Operating Input transient slew rate, 50V to 75V IN IN (Output may exceed regulation limits, no protective - - 5 V/µs shutdowns shall activate, C =220μF to C ) O O, max Non- operating continuous VIN 80 100 Vdc Operating Ambient Temperature All TA -40 85 °C (See Thermal Considerations section) Storage Temperature All T -55 125 °C stg I/O Isolation Voltage (100% factory Hi-Pot tested) All   2250 Vdc * Input over voltage protection will shut down the output voltage when the input voltage exceeds threshold level. 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 V 36 48 75 V IN dc Maximum Input Current IIN,max - - 13.5 Adc (V =0V to 75V, I =I ) IN O O, max Input No Load Current All I 87 mA IN,No load (VIN = VIN, nom, IO = 0, module enabled) Input Stand-by Current All I 30 mA IN,stand-by (VIN = VIN, nom, module disabled) External Input Capacitance All 100 - - μF 2 2 Inrush Transient All It - - 1 A s Input Terminal Ripple Current (Measured at module input pin with maximum specified input capacitance and ൏ 500uH inductance between All - 450 - mA rms voltage source and input capacitance C =220uF, 5Hz to IN 20MHz, VIN= 48V, IO= IOmax) Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 12μH source impedance; VIN= 48V, IO= All - 50 - mAp-p IOmax ; see Figure 11) Input Ripple Rejection (120Hz) All - 50 - 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 25A equivalent to 456 series from Littlefuse (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. December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 2 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Electrical Specifications (continued) Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Device Symbol Min Typ Max Unit Output Voltage Set-point (Default) Standard VO, set 11.97 12.00 12.03 V dc (VIN=VIN,nom, IO=21.0A, TA =25°C) Output Voltage All w/o -P VO 11.76  12.24 Vdc (Over all operating input voltage, resistive load, and -P Option VO 11.63  12.37 Vdc temperature conditions until end of life) Output Regulation Line All w/o -P  0.2  % VO, set Load All w/o -P  0.2  % V O, set Line -P Option 0.5 % V   O, set Load, Intentional Droop -P Option 0.50 Vdc Temperature (TA = -40ºC to +85ºC) All  2  % VO, set Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max, tested with a 1.0 μF ceramic, 10 μF aluminum and 220μF polymer capacitor across the load.) RMS (5Hz to 20MHz bandwidth) All  70  mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All 200 mV   pk-pk All except -Q 220  10,000 External Output Capacitance CO μF (For Co >5000µF, Io must be < 50% Io,max during Trise) -Q Option 6000 15,000 Output Current All I 0 35 A o dc Output Current Limit Inception All I 42 A O, lim   dc Efficiency (V =V , V = V , T=25°C) IN IN, nom O O,set A IO= 100% IO, max All η 95.5 % I = 55% - 90% I All η 95.7 % O O, max Switching Frequency (primary MOSFETs) f 150 kHz sw (Output Ripple 2X switching frequency) Dynamic Load Response (dIo/dt=1A/10s; Vin=Vin,nom; TA=25°C; tested with a 10 μF ceramic and 470μF polymer capacitor across the load.) Load Change from Io= 50% to 75% of Io,max: V  750  pk Peak Deviation All mVpk ts __ 800 __ Settling Time (Vo<10% peak deviation) s Load Change from Io= 75% to 50% of Io,max:  Peak Deviation V __ 750 mVpk pk __ Settling Time (Vo<10% peak deviation) t __ 800 s s General Specifications Parameter Device Symbol Typ Unit Calculated Reliability Based upon Telcordia SR-332 Issue All MTBF 11,117,223 Hours 3: Method I, Case 3, (IO=80%IO, max, TA=40°C, Airflow = 200 9 All FIT 90.0 10 /Hours LFM), 90% confidence Weight – Open Frame 49.6 (1.75) g (oz.) Weight – with Base plate option 69.2 (2.44) g (oz.) Isolation Specifications Parameter Symbol Min Typ Max Unit Isolation Capacitance Ciso  2000  pF Isolation Resistance Riso 10   MΩ December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 3 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A 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 (V =V to V , Signal referenced to V terminal) IN IN, min IN, max IN- 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 I 280  310 μA on/off 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 All Ion/off   10 μA (Von/off = 2.0V) Maximum voltage allowed on On/Off pin All Von/off   14.5 Vdc Turn-on Delay and Rise Time (IO=IO, max,) T delay, Enable with All w/o -P 150 ms   Tdelay=Time until VO = 10% of VO,set from either Vin application of Vin with Remote On/Off set to On (Enable Tdelay, Enable with All w/o-P   10 ms with Vin); or operation of Remote On/Off from Off to On on/off with Vin already applied for at least 150 milli-seconds Tdelay, Enable with w/ -P   180* ms (Enable with on/off). Vin * Increased T due to startup for parallel modules. delay T , delay Enable with w/ -P   40* ms on/off T =Time for V to rise from 10% to 90% of V , For All w/o - rise O O,set T 25 ms rise   C >5000uF, I must be < 50% I during T . P O O O, max rise * Increased T when Vo exists at startup for parallel rise w/ -P T 50* ms rise   modules. Load Sharing Current Balance -P (difference in output current across all modules with I 3 A diff Option outputs in parallel, no load to full load) All w/ ”9” Remote Sense Range VSense   0.5 Vdc option All w/ ”9” Output Voltage Adjustment range VO, set 6.0 13.2 Vdc option Output Overvoltage Protection Setpoint All V V+3.99V V O,OVPset O,SET dc Output Voltage Peak Limits prior to OVP Protection, (100%-0% load dump, CO=COmin all VIN, IO) (5.0V ≤VO,SET≤12.0V) All VO,limit VO,OVPset-0.5V  VO,OVPset+2.0V Vdc (12.01V ≤VO,SET≤13.2V) All VO,limit 15.49  17.99V Vdc Overtemperature Protection All Tref  135  °C (See Feature Descriptions) Input Undervoltage Lockout Turn-on Threshold  35 36 Vdc Turn-off Threshold 31 33 V  dc Input Overvoltage Lockout Turn-off Threshold  85  Vdc Turn-on Threshold  80  Vdc December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 4 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Characteristic Curves The following figures provide typical characteristics for the QSVW035A0B (12V, 35A) at 25ºC. The figures are identical for either positive or negative Remote On/Off logic. INPUT VOLTAGE, VO (V) OUTPUT CURRENT, IO (A) Figure 1. Typical Input Characteristic. Figure 2. Typical Converter Efficiency vs. Output Current. TIME, t (500 μs/div) TIME, t (2s/div) Figure 3. Typical Output Ripple and Noise, Io = Io,max, Co = Figure 4. Typical Transient Response to 0.1A/µs Step Co,min Change in Load from 50% to 75% to 50% of Full Load, Co=470µF and 48 Vdc Input. TIME, t (20 ms/div) TIME, t (10 ms/div) Figure 5. Typical Start-Up Using Vin with Remote On/Off Figure 6. Typical Start-Up Using Remote On/Off with Vin enabled, negative logic version shown. applied, negative logic version shown. December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 5 OUTPUT VOLTAGE INPUT VOLTAGE OUTPUT VOLTAGE, INPUT CURRENT, Ii (A) V (V) (5V/div) V (V) (20V/div) O IN V (V) (50mV/div) O EFFCIENCY, η (%) OUTPUT CURRENT OUTPUT VOLTAGE OUTPUT VOLTAGE On/Off VOLTAGE I (A) (10A/div) V (V) (500mV/div) O O VO (V) (5V/div) VON/OFF (V)(2V/div) Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Characteristic Curves (continued) INPUT VOLTAGE, Vin (V) OUTPUT CURRENT, IO (A) Figure 7. Typical Output Voltage Regulation vs. Input Figure 8. Typical Output Voltage Regulation vs. Output Voltage. Current. INPUT VOLTAGE, V (V) OUTPUT CURRENT, I (A) in O Figure 9. Typical Output Voltage Regulation vs. Input Figure 10. Typical Output Voltage Regulation vs. Output Voltage for the –P Version. Current for the –P Version. December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 6 OUTPUT VOLTAGE, V (V) O OUTPUT VOLTAGE, V (V) O OUTPUT VOLTAGE, VO (V) OUTPUT VOLTAGE, VO (V) Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A 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 11, a 220μF electrolytic capacitor, Cin, (ESR<0.7 at 100kHz), mounted close to the power module helps ensure the stability of the unit. If the module is subjected to rapid on/off cycles, a 330μF input capacitor is required. Consult the factory for further application guidelines. Note: Measure input reflected-ripple current with a simulated Safety Considerations source inductance (LTEST) of 12 µH. Capacitor CS offsets possible battery impedance. Measure current as shown above. For safety-agency approval of the system in which the power module is used, the power module must be installed Figure 11. Input Reflected Ripple Current Test Setup. 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 Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or both the input and output pins are to be kept floating. tantalum capacitor. Scope measurement should be made  The input pins of the module are not operator using a BNC socket. Position the load between accessible. 51 mm and 76 mm (2 in. and 3 in.) from the module.  Another SELV reliability test is conducted on the whole Figure 12. Output Ripple and Noise Test Setup. system (combination of supply source and subject module), as required by the safety agencies, to verify CONTACT AND that under a single fault, hazardous voltages do not DISTRIBUTION LOSSES appear at the module’s output. VO1 VI(+) IO II Note: Do not ground either of the input pins of the module LOAD SUPPL Y without grounding one of the output pins. This may allow a non-SELV voltage to appear between the output pins and ground. VI(–) VO2 CONT ACT The power module has safety extra-low voltage (SELV) RESIST ANCE outputs when all inputs are SELV. Note: All measurements are taken at the module terminals. When The input to these units is to be provided with a maximum socketing, place Kelvin connections at module terminals to avoid R 25A fast-acting (an example is Littlefuse 456 series with measurement errors due to socket contact resistance. part number 0456025 ER or its equivalent) fuse in the ungrounded input lead. The power module has internally generated voltages Figure 13. Output Voltage and Efficiency Test Setup. exceeding safety extra-low voltage. Consideration should be taken to restrict operator accessibility. December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 7 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current code suffix "1," is the factory-preferred configuration. The Feature Descriptions On/Off circuit is powered from an internal bias supply, Overcurrent Protection derived from the input voltage terminals. To turn the power module on and off, the user must supply a switch to control To provide protection in a fault output overload condition, the voltage between the On/Off terminal and the V (-) IN the module is equipped with internal current-limiting terminal (Von/off). The switch can be an open collector or circuitry and can endure current limiting continuously. If the equivalent (see Figure14). A logic LO is Von/off = -0.3V to 0.8V. overcurrent condition causes the output voltage to fall The typical Ion/off during a logic LO (Vin=48V, On/Off greater than 4.0V from Vo,set, the module will shut down and Terminal=0.3V) is 147µA. The switch should maintain a logic- remain latched off. The overcurrent latch is reset by either low voltage while sinking 310µA. During a logic HI, the cycling the input power or by toggling the on/off pin for one maximum Von/off generated by the power module is 8.2V. The second. If the output overload condition still exists when the maximum allowable leakage current of the switch at V = on/off module restarts, it will shut down again. This operation will 2.0V is 10µA. If using an external voltage source, the continue indefinitely until the overcurrent condition is maximum voltage V on the pin is 14.5V with respect to on/off corrected. the V (-) terminal. IN A factory configured auto-restart option (with overcurrent If not using the remote on/off feature, perform one of the and overvoltage auto-restart managed as a group) is also following to turn the unit on: available. An auto-restart feature continually attempts to For negative logic: short ON/OFF pin to V (-). restore the operation until fault condition is cleared. IN For positive logic: leave ON/OFF pin open. Output Overvoltage Protection The module contains circuitry to detect and respond to output overvoltage conditions. If the overvoltage condition causes the output voltage to rise above the limit in the Specifications Table, the module will shut down. The QSVW035A0B module is factory default configured for auto- restart operation. The auto-restart feature continually attempts to restore the operation until fault condition is cleared. 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. Figure 14. Remote On/Off Implementation. A factory configured auto-restart option (with overcurrent and overvoltage auto-restart managed as a group) is also Load Sharing available. An auto-restart feature continually attempts to restore the operation until fault condition is cleared. For higher power requirements, the QSVW035A0 power module offers an optional feature for parallel operation (-P Overtemperature Protection Option code). This feature provides a precise forced output The modules feature an overtemperature protection circuit voltage load regulation droop characteristic. The output set to safeguard against thermal damage. The circuit shuts point and droop slope are factory calibrated to insure down the module when the default maximum device optimum matching of multiple modules’ load regulation reference temperature is exceeded. The module is factory characteristics. To implement load sharing, the following default configured to automatically restart once the requirements should be followed: reference temperature cools by ~25°C.  The VOUT(+) and VOUT(-) pins of all parallel modules must be Input Under/Over Voltage Lockout connected together. Balance the trace resistance for each module’s path to the output power planes, to insure best At input voltages above or below the input under/over load sharing and operating temperature balance. voltage lockout limits, module operation is disabled. The  VIN must remain between 36Vdc and 75Vdc for droop module will begin to operate when the input voltage level sharing to be functional. changes to within the under and overvoltage lockout limits.  It is permissible to use a common Remote On/Off signal to start all modules in parallel. Remote On/Off  These modules contain means to block reverse current The module contains a standard on/off control circuit flow upon start-up, when output voltage is present from reference to the V (-) terminal. Two factory configured IN other parallel modules, thus eliminating the requirement remote on/off logic options are available. Positive logic for external output ORing devices. Modules with the –P remote on/off turns the module on during a logic-high option will self-determine the presence of voltage on the voltage on the ON/OFF pin, and off during a logic LO. output from other operating modules, and automatically Negative logic remote on/off turns the module off during a increase its Turn On delay, Tdelay, as specified in the Feature logic HI, and on during a logic LO. Negative logic, device Specifications Table. December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 8 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Feature Descriptions (continued)  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 T time max + T time). delay rise  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. Remote Sense (“9” Option Code) Figure 15. Circuit Configuration to Trim Output Voltage. Remote sense minimizes the effects of distribution losses by Connecting an external resistor (R ) between the T/C1 trim-down regulating the voltage at the remote-sense connections (See pin and the Vo(-) (or Sense(-)) pin decreases the output Figure15). The SENSE(-) pin should be always connected to voltage set point. To maintain set point accuracy, the trim VO(–).The voltage between the remote-sense pins and the resistor tolerance should be ±1.0%. output terminals must not exceed the output voltage sense The following equation determines the required external range given in the Feature Specifications table: resistor value to obtain a percentage output voltage change of ∆%. [V (+) – V (–)] – [SENSE(+) ]  0.5 V O O 511   Although the output voltage can be increased by both the R  10.22  trimdown   %   remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. The maximum 12 .0V  V Where   desired % 100 increase is the larger of either the remote sense or the trim. 12 .0V   The amount of power delivered by the module is defined as For example, to trim-down the output voltage of the module the voltage at the output terminals multiplied by the output by 20% to 9.6V, Rtrim-down is calculated as follows: current. When using remote sense and trim, the output voltage of the module can be increased, which at the same %20 output current, would increase the power output of the 511   module. Care should be taken to ensure that the maximum R  10.22 trimdown   20   output power of the module remains at or below the maximum rated power (Maximum rated power = Vo,set x R 15.3k trimdown Io,max). Connecting an external resistor (Rtrim-up) between the T/C1 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12.0V (100%) 511   R   10.22  trimup   1.225% %   V  12 .0V  Where desired %  100 Figure 15. Circuit Configuration for Remote Sense. 12 .0V   For example, to trim-up the output voltage of the module by 5% to 12.6V, R is calculated as follows: trim-up % 5 Trim, Output Voltage Programming 5.1112.0 (100  5) 511   R   10.22  trimup   1.225 5 5 Trimming allows the output voltage set point to be   increased or decreased; this is accomplished by connecting R  938.8 trimup an external resistor between the TRIM pin and either the The voltage between the Vo(+) and Vo(–) terminals must not VO(+) pin or the VO(-) pin. 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. December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 9 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current cooling can be verified by measuring the thermal reference Feature Descriptions (continued) temperature (TH1 or TH2). Peak temperature occurs at the position indicated in Figure 16 and 17. For reliable operation Although the output voltage can be increased by both the this temperature should not exceed TREF = 125°C, and remote sense and by the trim, the maximum increase for TREF1=105°C or TREF2=105°C. For extremely high reliability the output voltage is not the sum of both. The maximum you can limit this temperature to a lower value. 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 I ). O,max Thermal Considerations The thermal data presented here is based on physical . measurements taken in a wind tunnel, using automated thermo-couple instrumentation to monitor key component Figure 16. Location of the thermal reference temperature temperatures: FETs, diodes, control ICs, magnetic cores, TH. ceramic capacitors, opto-isolators, and module pwb conductors, while controlling the ambient airflow rate and temperature. For a given airflow and ambient temperature, the module output power is increased, until one (or more) of the components reaches its maximum derated operating temperature, as defined in IPC-9592B. This procedure is then repeated for a different airflow or ambient temperature until a family of module output derating curves is obtained. Figure 17. 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. 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. Heat Transfer via Convection Increased airflow over the module enhances the heat transfer via convection. The thermal derating of figure 19- 20 shows the maximum output current that can be The power modules operate in a variety of thermal delivered by each module in the indicated orientation environments and sufficient cooling should be provided to without exceeding the maximum TH temperature versus x help ensure reliable operation. Thermal considerations local ambient temperature (TA) for several air flow include ambient temperature, airflow, module power conditions. dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will The use of Figure 18 is shown in the following example: result in an increase in reliability. Example What is the minimum airflow necessary for a QSVW035A0B Heat-dissipating components are mounted on the top side operating at VI = 48 V, an output current of 20A, and a of the module. Heat is removed by conduction, convection and radiation to the surrounding environment. Proper December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 10 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Thermal Considerations (continued) maximum ambient temperature of 60 °C in transverse orientation. Solution: Given: Vin= 48V, IO = 20A, TA = 60 °C Determine required airflow velocity (Use Figure 18): Velocity = 0.5m/s (100 LFM) or greater. LOCAL AMBIENT TEMPERATURE, T (C) A Figure 20. Output Current Derating for the Base plate QSVW035A0B-H with 0.25” heatsink in the Transverse Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V LOCAL AMBIENT TEMPERATURE, T (C) A Figure 18. Output Current Derating for the Open Frame QSVW035A0B in the Transverse Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V. LOCAL AMBIENT TEMPERATURE, TA (C) Figure 21. Output Current Derating for the Base plate QSVW035A0B-H with 0.5” heatsink in the Transverse Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V LOCAL AMBIENT TEMPERATURE, T (C) A Figure 19. Output Current Derating for the Base plate QSVW035A0B-H in the Transverse Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V. LOCAL AMBIENT TEMPERATURE, T (C) A Figure 22. Output Current Derating for the Base plate QSVW035A0B-H with 1.0” heatsink in the Transverse Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V. December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 11 OUTPUT CURRENT, IO (A) OUTPUT CURRENT, I (A) O OUTPUT CURRENT, IO (A) OUTPUT CURRENT, I (A) OUTPUT CURRENT, I (A) O O Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current linear reflow profile using Sn/Ag/Cu solder is shown in Figure Layout Considerations 23. The QSVW035A0B 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 non-Z version products use lead-tin Figure 23. Recommended linear reflow profile using (Pb/Sn) solder and RoHS-compliant components. Both Sn/Ag/Cu solder. 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 MSL Rating Pb and Pb-free wave soldering processes. A maximum The QSVW035A0B modules have a MSL rating of 2a. preheat rate of 3C/s is suggested. The wave preheat process should be such that the temperature of the power Storage and Handling module board is kept below 210C. For Pb solder, the The recommended storage environment and handling recommended pot temperature is 260C, while the Pb-free procedures for moisture-sensitive surface mount packages solder pot is 270C max. Not all RoHS-compliant through- is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping hole products can be processed with paste-through-hole Pb and Use of Moisture/Reflow Sensitive Surface Mount or Pb-free reflow process. If additional information is Devices). Moisture barrier bags (MBB) with desiccant are needed, please consult with your GE representative for more required for MSL ratings of 2 or greater. These sealed details. packages should not be broken until time of use. Once the original package is broken, the floor life of the product at Reflow Lead-Free Soldering Information conditions of 30°C and 60% relative humidity varies The RoHS-compliant through-hole products can be according to the MSL rating (see J-STD-033A). The shelf life processed with the following paste-through-hole Pb or Pb- for dry packed SMT packages will be a minimum of 12 free reflow process. months from the bag seal date, when stored at the following conditions: < 40° C, < 90% relative humidity. Max. sustain temperature : 245C (J-STD-020C Table 4-2: Packaging Thickness>=2.5mm Post Solder Cleaning and Drying 3 / Volume > 2000mm ), Considerations Peak temperature over 245C is not suggested due to the potential reliability risk of components under continuous Post solder cleaning is usually the final circuit-board high-temperature. assembly process prior to electrical board testing. The result Min. sustain duration above 217C : 90 seconds of inadequate cleaning and drying can affect both the Min. sustain duration above 180C : 150 seconds reliability of a power module and the testability of the Max. heat up rate: 3C/sec finished circuit-board assembly. For guidance on Max. cool down rate: 4C/sec appropriate soldering, cleaning and drying procedures, refer In compliance with JEDEC J-STD-020C spec for 2 times to GE Board Mounted Power Modules: Soldering and reflow requirement. Cleaning Application Note (AP01-056EPS). 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-STD-020C specification for 3 times reflow requirement. The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 12 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current EMC Considerations The circuit and plots in Figure 24 show 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 FLT012A0Z data sheet. Figure 24. EMC Consideration December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 13 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Packaging Details All versions of the QSVW035A0B are supplied as standard in the plastic trays shown in Figure 25. Each tray contains a total of 12 power modules. The trays are self-stacking and each shipping box for the QSVW035A0B module contains 2 full trays plus one empty hold-down tray giving a total number of 24 power modules. Tray Specification Material PET (1mm) 9 11 Max surface 10 -10 /PET resistivity Color Clear Capacity 12 power modules Min order quantity 24 pcs (1 box of 2 full trays + 1 empty top tray) Open Frame Module Tray Base Plate Module Tray Figure 25. QSVW035 Packaging Tray December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 14 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Mechanical Outline for QSVW035A0B 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 GE 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 Number Pin Name 1 VIN(+) 2 ON/OFF 3 VIN(-) 4 VOUT(-) 5 SENSE(-) 6 TRIM 7 SENSE(+) 8 VOUT(+) December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 15 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Mechanical Outline for QSVW035A0B–H (Baseplate version) 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 GE 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 Number Pin Name 1 VIN(+) 2 ON/OFF 3 VIN(-) 4 VOUT(-) 5 SENSE(-) 6 TRIM 7 SENSE(+) 8 VOUT(+) December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 16 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A 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 Number Pin Name 1 VIN(+) 2 ON/OFF 3 VIN(-) 4 VOUT(-) 5 SENSE(-) 6 TRIM 7 SENSE(+) 8 VOUT(+) Hole and Pad diameter recommendations: Pin Number Hole Dia mm [in] Pad Dia mm [in] 1, 2, 3, 5, 6, 7 1.6 [.063] 2.1 [.083] 4, 8 2.2 [.087] 3.2 [.126] December 2, 2015 ©2012 General Electric Company. All rights reserved. Page 17 Data Sheet GE * QSVW035A0B Barracuda Series Power Modules; DC-DC Converters 36Vdc –75Vdc Input; 12Vdc Output; 35A Output Current Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. Table 1. Device Codes Input Output Output MSL Connector Product codes Efficiency Comcodes Voltage Voltage Current Rating Type QSVW035A0B41Z 48V (36 -75Vdc) 12V 35A 95.5% 2a Through Hole 150032177 QSVW035A0B41-HZ 48V (36 -75Vdc) 12V 35A 95.5% 2a Through Hole 150032176 QSVW035A0B641-HZ 48V (36 -75Vdc) 12V 35A 95.5% 2a Through Hole 150039184 Table 2. Device Options Contact Us For more information, call us at USA/Canada: +1 877 546 3243, or +1 972 244 9288 Asia-Pacific: +86.021.54279977*808 Europe, Middle-East and Africa: +49.89.878067-280 www.gecriticalpower.com GE Critical Power reserves the right to make changes to the product(s) or information contained herein without notice, and 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. December 2, 2015 ©2012 General Electric Company. All International rights reserved. Version 1.2