Specifications
PFC MegaPAC™ Power Factor Corrected AC-DC Switchers
Overview
The PFC MegaPAC family of supplies combine power factor correction (PFC) with the inherent configurability of
all Westcor MegaPAC products. This design guide covers 4 model variations:
1. PFC MegaPAC 1600W max, standard chassis
2. PFC MegaPAC MI 1600W max, rugged COTS chassis
3. PFC MegaPAC High Power 2400W max, standard chassis
4. PFC MegaPAC High Power MI 2400W max, rugged COTS chassis
All PFC MegaPACs have the same input and output connections, mounting points, and the same dimensions:
The extended length (-EL) chassis is covered in a different design guide
A complete power supply is configured at the factory by selecting and inserting up to eight same length slide-in
output assemblies called ConverterPACs. ConverterPACs incorporate one (or more) VI-200/VI-J00), Maxi Vicor
DC to DC converters and/or FlexPACs and are available in a wide selection of output voltage and power levels.
The net result is a power supply that offers the advantages of a custom supply, but is assembled from standard and
modular building blocks. Currently, the standard power chassis uses only FlexPACs and ConverterPACs with VI-
200/VI-J00 Vicor DC to DC converters while the high power chassis accepts FlexPACs and ConverterPACs with
both VI-200/VI-J00 and/or Maxi module. (Refer to page 7 for a brief overview of the ConverterPACs used.) Using
the PowerBench configurator tool available on vicorpower.com, anybody can now configure a PFC MegaPAC
(and other Westcor power supplies) online.
Manufactured at Westcor, a division of Vicor, the entire family of MegaPAC power supplies is completely user-
configurable. If output requirements change, i.e., more power or a different output voltage is needed, upgrading is
easy: simply unlock a single screw and replace the slide-in ConverterPAC assembly with one that is of the same
length and has the desired voltage power rating. For additional flexibility, ConverterPACs can be connected in par-
allel to increase output power (booster ConverterPACs), or in series for higher voltages (total output voltage should
not exceed 400V). The driver is to the left of the boosters when looking at the output end of the supply. A user-
friendly interface provides control and output sequencing capability (see page 27 for more information about this
capability), in addition to useful status indicators. Please consult our Applications Engineering Department if you
have other special requirements.
Standard Features
• Power Factor Correction; 0.99 at 115 Vac, 0.95 at 230 Vac
• Universal Input: 85-264 Vac, 47-500 Hz, or 100-380 Vdc
• Power Outputs: Standard Chassis: 1,600W at 230 Vac High Power Chassis: 2,400W at 230 Vac
1,200W at 115 Vac 1,200W at 115 Vac
• Outputs: Standard Chassis: Up to 32 outputs High Power Chassis: Up to 25 outputs
• Fan Cooled
• Full power to 40°C; half power to 60°C
• Soft start for limiting inrush current
• Conducted EMI meets FCC class A and EN 55022 class A Some configurations meet Class B. Consult Factory
• Harmonic Distortion to EN61000-3-2
• RoHS compliant available
• Output Sequencing and General Shutdown (Refer pg. 25. Consult Applications Engineering for automatic sequencing circuitry.)
• Overcurrent protection on all outputs
• Overvoltage protection and Overtemperature limiting on all ConverterPAC outputs (not applicable with VI-J00)
• Size: 3.4”H x 6.0”W x 12.4”L (313,9mm x 152,4mm x 309,mm)
• Safety Agency Approvals: cURus, cTUVus, CE Mark
Optional Features
• DC OK status signal
• Current Share Boards - see page 24 and 25
• Output voltage adjustment range with built-in potentiometer
• Low Leakage Version available upon request - see page 26
• -40C operation
• Conformal Coating (contact factory)
Rev. 4/2010 Vicor 800-735-6200 Westcor Division 408-522-5280 Applications Engineering 800-927-9474 Pg. 3
PFC MegaPAC Design Guide