Data Sheet 28V Wide Input Micro Family DC-DC Converter Module Features • • • • • • • • • • • DC input range: 9 - 36 V Input surge withstand: 50 V for 100 ms DC output: 3.3 – 48 V Programmable output: 10 to 110% Regulation: ±0.4% no load to full load Efficiency: Up to 81% Maximum operating temp: 100°C, full load Power density: up to 60 W per cubic inch Height above board: 0.43 in. (10,9 mm) Parallelable, with N+M fault tolerance Low noise ZCS / ZVS architecture Product Overview These DC-DC converter modules use advanced power processing, control and packaging technologies to provide the performance, flexibility, reliability and cost effectiveness of a mature power component. High frequency ZCS / ZVS switching provides high power density with low noise and high efficiency. Applications Industrial and process control, distributed power, medical, ATE, communications, defense, aerospace Shown actual size: 2.28 x 1.45 x 0.5 in 57,9 x 36,8 x 12,7 mm Absolute Maximum Ratings Parameter Rating Unit +In to -In voltage -0.5 to +53 Vdc PC to -In voltage -0.5 to +7.0 Vdc PR to -In voltage -0.5 to +7.0 Vdc SC to -Out voltage -0.5 to +1.5 Vdc Notes Isolation voltage in to out 3000 Vrms Test voltage in to base 1500 Vrms Test voltage Test voltage 500 Vrms Operating Temperature out to base -55 to +100 °C Storage Temperature -65 to +125 °C 500 (260) °F (°C) <5 sec; wave solder 750 (390) °F (°C) <7 sec; hand solder 5 (0.57) in-lbs (N-m) Pin soldering temperature Mounting torque M-Grade M-Grade 6 each Part Numbering e.g. V28C12T100BL2 V28C Output Voltage 3V 3 5 8 12 15 24 28 36 48 = = = = = = = = = 3.3 V 5V 8V 12 V 15 V 24 V 28 V 36 V 48 V Vicor Corp. Product Grade Temperatures (°C) Grade Operating Storage C = - 20 to +100 - 40 to +125 T = - 40 to +100 - 40 to +125 H = - 40 to +100 - 55 to +125 M = - 55 to +100 - 65 to +125 B Output Power Vout Pout 3.3 V 50 W 5V 50 W 8V 50 W 12 V 100 W 15 V 100 W 24 V 100 W 28 V 100 W 36 V 100 W 48 V 100 W Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 Pin Style Blank: Short Tin / Lead L: Long Tin / Lead S: Short ModuMate N: Long ModuMate F: Short RoHS G: Long RoHS Baseplate Blank: Slotted 2: Threaded 3: Through hole 28V Micro Family Set your site on VICOR at vicorpower.com For a description of pin options, see page 9. Baseplate options include slotted flanges, threaded and through hole. See page 10 for dimensions. For other package sizes and power levels, see the Mini (half size) and Maxi (full size) data sheets. Rev. 1.2 Page 1 of 11 MODULE FAMILY ELECTRICAL CHARACTERISTICS Electrical characteristics apply over the full operating range of input voltage, output load (resistive) and baseplate temperature, unless otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate. MODULE INPUT SPECIFICATIONS Parameter Operating input voltage Min Typ Max Unit Notes 9 28 36 Vdc From 9 to 10 V input available power is reduced to 75% of max rating. 50 Vdc <100 ms 8.9 Vdc Input surge withstand Undervoltage turn-on 8.8 Undervoltage turn-off 8.5 Overvoltage turn-off / on 36.3 Vdc 37.8 39.6 Vdc 4.0 mA PC pin low Max Unit Notes ±1 % Vout nom. Nominal input; full load; 25°C Low line to high line; full load Disabled input current MODULE OUTPUT SPECIFICATIONS Parameter Min Typ Output voltage set point Line regulation ±0.02 ±0.20 % Temperature regulation ±0.002 ±0.005 % / °C Power sharing accuracy ±2 ±5 % 10 to 100% of full load % Of nominal output voltage. For trimming below 90% of nominal, a minimum load of 10% of maximum rated power may be required. 10 Programming range 110 +Out to –Out — Absolute Maximum Ratings 3.3 V 5V 8V 12 V 15 V 24 V 28 V 36 V 48 V -0.5 to 4.7 -0.5 to 7.0 -0.5 to 10.9 -0.5 to 16.1 -0.5 to 20.0 -0.5 to 31.7 -0.5 to 36.9 -0.5 to 47.1 -0.5 to 62.9 Over operating temperature range Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Externally applied Externally applied Externally applied Externally applied Externally applied Externally applied Externally applied Externally applied Externally applied Note: For important information relative to applications where the converter modules are subject to continuous dynamic loading, contact Vicor applications engineering at 800-927-9474. Thermal Resistance and Capacity Parameter Min Typ Max Unit Baseplate to sink; flat, greased surface 0.24 °C/Watt Baseplate to sink; thermal pad (P/N 20265) 0.21 °C/Watt Baseplate to ambient 10.9 °C/Watt Baseplate to ambient; 1000 LFM 2.8 °C/Watt Thermal capacity 48 Watt-sec/°C Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 Page 2 of 11 MODULE FAMILY ELECTRICAL CHARACTERISTICS (CONT.) MODULE CONTROL SPECIFICATIONS Parameter Min Typ Max Unit Notes PRIMARY SIDE (PC = Primary Control; PR = Parallel) PC bias voltage current limit 5.50 1.5 5.75 2.1 6.00 3.0 Vdc mA PC current = 1.0 mA PC voltage = 5.5 V PC module disable 2.3 2.6 2.9 Vdc Must be able to sink ≥4 mA. See Fig. 1 4 7 ms 0.5 Vavg UV, OV, OT, module fault. See Figs. 2 and 4 PC module enable delay PC module alarm PC resistance 0.9 1.0 1.1 MΩ See Fig. 2 PR emitter amplitude 5.7 5.9 6.1 Volts PR load >30 Ω, < 30 pF PR emitter current 150 PR receiver impedance 375 500 625 Ω PR receiver threshold 2.4 2.5 2.6 Volts Minimum pulse width: 20 ns 12 modules Without PR buffer amplifier mA PR drive capability 25°C SECONDARY SIDE (SC = Secondary Control) SC bandgap voltage 1.21 1.23 1.25 Vdc SC resistance 990 1000 1010 Ω SC capacitance SC module alarm Referenced to –Out 0.033 µF 0 Vdc With open trim; referenced to –Out. See Fig. 6 MODULE GENERAL SPECIFICATIONS Parameter Min Unit Notes Isolation voltage (in to out) 3000 Vrms Complies with reinforced insulation requirements Isolation voltage (in to base) 1500 Vrms Complies with basic insulation requirements Isolation voltage (out to base) 500 Vrms Complies with operational insulation requirements Isolation resistance (in to out) Typ 10 Weight 2.3 (65.2) Temperature limiting Agency approvals Max 100 MΩ 2.4 (68.1) 115 cURus, TÜV, CE ounces (grams) °C See Figs. 2 and 4 UL60950-1, CSA0950-1, EN60950-1, IEC60950-1 With appropriate fuse in series with the +Input Note: Specifications are subject to change without notice. Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 Page 3 of 11 MODULE SPECIFIC OPERATING SPECIFICATIONS 3.3 Vout, 50 W (e.g. V28C3V3C50BL) Parameter Efficiency Ripple and noise Output OVP set point Dissipation, standby Load regulation Load current Current limit Short circuit current Min 70.5 4.14 0 15.5 10.6 Typ 71.4 180 4.3 5.2 ±0.02 17.5 17.5 Max 225 4.46 6.2 ±0.2 15.15 20.6 20.6 Unit % mV Volts Watts % Amps Amps Amps Notes Nominal input; full load; 25°C p-p; Nominal input; full load; 20 MHz bandwith 25°C; recycle input voltage to restart (>100 ms off) No load No load to full load; nominal input Unit % mV Volts Watts % Amps Amps Amps Notes Nominal input; full load; 25°C p-p; Nominal input; full load; 20MHz bandwith 25°C; recycle input voltage to restart (>100 ms off) No load No load to full load; nominal input Unit % mV Volts Watts % Amps Amps Amps Notes Nominal input; full load; 25°C p-p; Nominal input; full load; 20 MHz bandwith 25°C; recycle input voltage to restart (>100 ms off) No load No load to full load; nominal input Unit % mV Volts Watts % Amps Amps Amps Notes Nominal input; full load; 25°C p-p; Nominal input; full load; 20 MHz bandwith 25°C; recycle input voltage to restart (>100 ms off) No load No load to full load; nominal input Output voltage 95% of nominal Output voltage <250 mV 5 Vout, 50 W (e.g. V28C5C50BL) Parameter Efficiency Ripple and noise Output OVP set point Dissipation, standby Load regulation Load current Current limit Short circuit current Min 75.5 6.03 0 10.2 7 Typ 77 127 6.25 2.9 ±0.02 11.5 11.5 Max 159 6.47 3.5 ±0.2 10 13.5 13.5 Output voltage 95% of nominal Output voltage < 250 mV 12 Vout, 100 W (e.g. V28C12C100BL) Parameter Efficiency Ripple and noise Output OVP set point Dissipation, standby Load regulation Load current Current limit Short circuit current Min 78.5 13.7 0 8.49 5.83 Typ 80 200 14.3 6.8 ±0.02 9.58 9.58 Max 250 14.9 7.5 ±0.2 8.33 11.3 11.3 Output voltage 95% of nominal Output voltage < 250 mV 15 Vout, 100 W (e.g. V28C15C100BL) Parameter Efficiency Ripple and noise Output OVP set point Dissipation, standby Load regulation Load current Current limit Short circuit current Vicor Corp. Min 79 17.1 0 6.8 4.66 Typ 80.7 200 17.8 7.1 ±0.02 7.67 7.67 Max 250 18.5 10 ±0.2 6.67 9.01 9.01 Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 Output voltage 95% of nominal Output voltage < 250 mV 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 Page 4 of 11 MODULE SPECIFIC OPERATING SPECIFICATIONS (CONT.) 24 Vout, 100 W (e.g. V28C24C100BL) Parameter Efficiency Ripple and noise Output OVP set point Dissipation, standby Load regulation Load current Current limit Short circuit current Min 80.3 27.1 0 4.25 2.91 Typ 81.8 180 28.1 5.3 ±0.02 4.8 4.8 Max 225 29.1 6.2 ±0.2 4.17 5.63 5.63 Unit % mV Volts Watts % Amps Amps Amps Notes Nominal input; full load; 25°C p-p; Nominal input; full load; 20 MHz bandwith 25°C; recycle input voltage to restart (>100 ms off) No load No load to full load; nominal input Unit % mV Volts Watts % Amps Amps Amps Notes Nominal input; full load; 25°C p-p; Nominal input; full load; 20 MHz bandwith 25°C; recycle input voltage to restart (>100 ms off) No load No load to full load; nominal input Unit % mV Volts Watts % Amps Amps Amps Notes Nominal input; full load; 25°C p-p; Nominal input; full load; 20 MHz bandwith 25°C; recycle input voltage to restart (>100 ms off) No load No load to full load; nominal input Unit % mV Volts Watts % Amps Amps Amps Notes Nominal input; full load; 25°C p-p; Nominal input; full load; 20 MHz bandwith 25°C; recycle input voltage to restart (>100 ms off) No load No load to full load; nominal input Output voltage 95% of nominal Output voltage <250 mV 28 Vout, 100 W (e.g. V28C28C100BL) Parameter Efficiency Ripple and noise Output OVP set point Dissipation, standby Load regulation Load current Current limit Short circuit current Min 79 31.5 0 3.64 2.49 Typ 80.6 160 32.7 7.6 ±0.02 4.11 4.11 Max 200 33.9 8.3 ±0.2 3.57 5.35 5.35 Output voltage 95% of nominal Output voltage < 250 mV 36 Vout, 100 W (e.g. V28C36C100BL) Parameter Efficiency Ripple and noise Output OVP set point Dissipation, standby Load regulation Load current Current limit Short circuit current Min 79.5 40.4 0 2.83 1.94 Typ 80.9 180 41.9 5.8 ±0.02 3.2 3.2 Max 225 43.4 6.2 ±0.2 2.78 3.76 3.76 Output voltage 95% of nominal Output voltage <250 mV 48 Vout, 100 W (e.g. V28C48C100BL) Parameter Efficiency Ripple and noise Output OVP set point Dissipation, standby Load regulation Load current Current limit Short circuit current Vicor Corp. Min 78.2 53.7 0 2.12 1.45 Typ 79.7 125 55.7 7.4 ±0.02 2.39 2.39 Max 157 57.7 8.0 ±0.2 2.08 3.31 3.31 Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 Output voltage 95% of nominal Output voltage < 250 mV 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 Page 5 of 11 CONTROL FUNCTIONS - PC PIN Module Enable/Disable Module Alarm The module may be disabled by pulling PC below 2.3 V with respect to the –Input. This may be done with an open collector transistor, relay, or optocoupler. Multiple converters may be disabled with a single transistor or relay either directly or via “OR’ing” diodes. See Figure 1. The module contains “watchdog” circuitry which monitors input voltage, operating temperature and internal operating parameters. In the event that any of these parameters are outside of their allowable operating range, the module will shut down and PC will go low. PC will periodically go high and the module will check to see if the fault (as an example, overtemperature) has cleared. If the fault has not been cleared, PC will go low again and the cycle will restart. The SC pin will go low in the event of a fault and return to its normal state after the fault has been cleared. See Figures 2 and 4. Primary Auxiliary Supply At 5.7 V, PC can source up to 1.5 mA. In the example shown in Figure 3, PC powers a module enabled LED. +In Disable PC PC PR PR [a] Figure 1 — Module enable / disable. SW1 50 Ω SW3 SW2 5.7 Vdc (0-3 mA) SC 1K 6K 1.23 Vdc –IN –In +OUT Auto Restart 2-20 ms typ. f(VIN) 1M Disable = PC <2.3V Input Undervoltage Input Overvoltage [a] Over Temperature Module Faults +IN SW1, 2, & 3 shown in "Fault" position –OUT Not applicable for 300 Vdc Input family Figure 2 — PC/SC module alarm logic. +In PC Fault PC 40μs typ. 5.7V 4kΩ "Module Enabled" PR –In 1.23V 2-20ms typ. Figure 4 — PC/SC module alarm timing. Figure 3 — LED on-state indicator. +In Optocoupler SC +OUT Comparator PC SC 4kΩ –In Figure 5 — Isolated on-state indicator. Vicor Corp. Alarm PR Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 –OUT 1.00 V Figure 6 — Secondary side on-state indicator. 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 Page 6 of 11 CONTROL FUNCTIONS - SC PIN Output Voltage Programming The output voltage of the converter can be adjusted or programmed via fixed resistors, potentiometers or voltage DACs. See Figures 7 and 8. +OUT +OUT RU Trim Up Error Amp SC Load RD Trim Down 0.033 μF 1 kΩ Error Amp SC 1 kΩ 0.033 μF –OUT –OUT 1.23 V RD (ohms) = Load 1.23 V 1,000 Vout Vnom – Vout RU (ohms) = 1,000 (Vout –1.23) Vnom – 1,000 1.23 (Vout – Vnom) Figure 7 — Output voltage trim down circuit. Figure 8 — Output voltage trim up circuit. Trim Down Trim Up 1. This converter is not a constant power device – it has a constant current limit. Hence, available output power is reduced by the same percentage that output voltage is trimmed down. Do not exceed maximum rated output current. 1. The converter is rated for a maximum delivered power. To ensure that maximum rated power is not exceeded, reduce maximum output current by the same percentage increase in output voltage. 2. The trim down resistor must be connected to the –Out pin 2. The trim up resistor must be connected to the +Out pin. 3. Do not trim the converter above maximum trim range (typically +10%) or the output over voltage protection circuitry may be activated. Trim resistor values calculated automatically: Online calculators for trim resistor values are available on the vicor website at: vicorpower.com/tools. Resistor values can be calculated for fixed trim up, fixed trim down and for variable trim up or down. In addition to trimming information, the website and the Applications Manual also include design tips, applications circuits, EMC suggestions, thermal design guidelines and PDF data sheets for all available Vicor products. Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 Page 7 of 11 CONTROL FUNCTIONS - PR PIN Parallel Operation +Out +In The PR pin supports paralleling for increased power with N+1 (N+M) redundancy and phased array capability. Modules of the same input voltage, output voltage, and power level will current share if all PR pins are suitably interfaced. PC Module 1 SC PR –Out –In Compatible interface architectures include the following: DC coupled single-wire interface. All PR pins are directly connected to one another. This interface supports current sharing but is not fault tolerant. Negative In pins must be tied to the same electric potential. Up to three converters may be paralleled by this method. See Figure 9. AC coupled single-wire interface. All PR pins are connected to a single communication bus through 0.001 μF (500 V) capacitors. This interface supports current sharing and is fault tolerant except for the communication bus. Up to three converters may be paralleled by this method. See Figure 10. Transformer coupled interface. For paralleling four or more converters a transformer coupled interface is required. For details on this configuration please refer to the design guide referenced in the following technical information section. +Out +In PC PR Module 2 (up to 12) –Out –In Ground plane Figure 9 — DC coupled single-wire interface. +Out +In 0.001µF PC Module 1 SC PR –Out –In 0.001µF PR Technical Information +Out +In PC Module 2 (up to 12) SC –Out –In For additional technical information contained in the Design Guide and Applications Manual for Maxi, Mini, Micro Family DC-DC Converters and Accessory Modules, click on the link below: SC Ground plane Figure 10 — AC coupled single-wire interface. http://www.vicorpower.com/mmmguide Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 Page 8 of 11 CONTROL FUNCTIONS - PR PIN (CONT.) +S R7 21.0 k R1 R2 SC +OUT Module #2 trimmed down 2 % SC • At the discretion of the power system designer, a subset of all modules within an array may be configured as slaves by shorting SC to –Out. –OUT +OUT Module #3 trimmed down 4 % • Do not use output OR’ing diodes with MicroMods. SC –OUT U1 PS2701 L O A D Ground Plane Figure 11 — N+1 module array output connections. C3 R4 R3 2.55 k U2 R5 1.00 k TLV431 R6 C1 1.65 k 470 pF R11 36.5 k C2 0.22 µF R9 R8 4.02 k Vcc + –OUT +Out – SC 200 mV U3 LM10 Gnd + • The +Out and –Out power buses should be designed to minimize and balance parasitic impedance from each module output to the load. Plane R Load – +OUT Module #1 Designated Master R10 1.24 k –S –Out See Component Selection section below. • This module is designed for point of load regulation, where remote sensing is not required. Active voltage drop compensator, as shown here, may be used in applications with significant distribution losses. Please consult with the Micro Family Isolated Remote Sense Application Note for additional information. Figure 12 — Voltage drop compensation. PIN STYLES* Designator Description Notes (None) Short Tin / Lead Requires inboard, mounting L Long Tin / Lead Onboard mounting for 0.065" boards S Short ModuMate SurfMate or inboard socket mounting N Long ModuMate Onboard socket mounting F Short RoHS Select for RoHS compliant inboard solder, socket, or SurfMate mounting G Long RoHS Select for RoHS compliant onboard solder or socket mounting * Pin style designator follows the “B” after the output power and precedes the baseplate designator. Ex. V28C12T100BN2 — Long ModuMate Pins Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 Page 9 of 11 MECHANICAL DRAWINGS Converter Pins No. Function Label 1 +In + Primary 2 PC Control 3 Parallel PR 4 –In – 5 –Out – 6 7 Secondary Control +Out SC + Figure 13 — Module outline ALL MARKINGS THIS SURFACE 0.062 ±0.010 PCB THICKNESS 1,57 ±0,25 0.800* INBOARD SOLDER MOUNT ONBOARD SOLDER MOUNT SHORT PIN STYLE 0.094 ±0.003 2,39 ±0,08 LONG PIN STYLE 0.094 ±0.003 2,39 ±0,08 20,32 0.525* 13,34 PLATED THRU HOLE DIA 0.275* 6,99 0.145* 3,68 2 3 4 1.734** 44,04 2.000* 50,80 7 6 .400* 10,16 1.090** 27,69 FOR SOLDERING METHODS AND PROCEDURES PLEASE REFER TO THE MAXI, MINI, MICRO DESIGN GUIDE. 5 0.06 (4X) 1,5 *DENOTES TOL = ±0.003 ±0,08 ALUMINUM BASEPLATE PINS STYLES SOLDER:TIN/LEAD HOT SOLDER DIPPED MODUMATE: GOLD PLATED COPPER RoHS: GOLD PLATED COPPER 0.133 3,38 1 R (7X) 0.43 10,9 Unless otherwise specified, dimensions are in inches mm 0.53 13,5 Decimals **PCB WINDOW Tol. 0.XX ±0.01 0.XXX ±0.005 ±0.25 Angles ±1° ±0.127 Figure 14 — PCB mounting specifications Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 Page 10 of 11 Warranty Vicor products are guaranteed for two years from date of shipment against defects in material or workmanship when in normal use and service. This warranty does not extend to products subjected to misuse, accident, or improper application or maintenance. Vicor shall not be liable for collateral or consequential damage. This warranty is extended to the original purchaser only. EXCEPT FOR THE FOREGOING EXPRESS WARRANTY, VICOR MAKES NO WARRANTY, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Vicor will repair or replace defective products in accordance with its own best judgement. For service under this warranty, the buyer must contact Vicor to obtain a Return Material Authorization (RMA) number and shipping instructions. Products returned without prior authorization will be returned to the buyer. The buyer will pay all charges incurred in returning the product to the factory. Vicor will pay all reshipment charges if the product was defective within the terms of this warranty. Information published by Vicor has been carefully checked and is believed to be accurate; however, no responsibility is assumed for inaccuracies. Vicor reserves the right to make changes to any products without further notice to improve reliability, function, or design. Vicor does not assume any liability arising out of the application or use of any product or circuit; neither does it convey any license under its patent rights nor the rights of others. Vicor general policy does not recommend the use of its components in life support applications wherein a failure or malfunction may directly threaten life or injury. Per Vicor Terms and Conditions of Sale, the user of Vicor components in life support applications assumes all risks of such use and indemnifies Vicor against all damages. Vicor’s comprehensive line of power solutions includes high density AC-DC and DC-DC modules and accessory components, fully configurable AC-DC and DC-DC power supplies, and complete custom power systems. Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. Vicor components are not designed to be used in applications, such as life support systems, wherein a failure or malfunction could result in injury or death. All sales are subject to Vicor’s Terms and Conditions of Sale, which are available upon request. Specifications are subject to change without notice. Intellectual Property Notice Vicor and its subsidiaries own Intellectual Property (including issued U.S. and Foreign Patents and pending patent applications) relating to the products described in this data sheet. Interested parties should contact Vicor's Intellectual Property Department. Vicor Corporation 25 Frontage Road Andover, MA, USA 01810 Tel: 800-735-6200 Fax: 978-475-6715 email Customer Service: [email protected] Technical Support: [email protected] Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 28V Micro Family Set your site on VICOR at vicorpower.com Rev. 1.2 08/09