Specifications

ConverterPAC Functional Description (See ConverterPAC Datasheet and/or Design Guide for complete information on all ConverterPACs.)
ConverterPACs are the family of slide-in output assemblies used in MegaPAC power supplies. Most ConverterPACs
of the same length are interchangeable within a MegaPAC and between different AC input MegaPAC chassis
(Exceptions are the FinPAC and UniPAC). They can be added, moved, or changed as necessary. The following
ConverterPACs can be used in the PFC MegaPAC and/or PFC MegaPAC-High Power.
Spec sheets for ConverterPACs are available at http://www.vicorpower.com/
ModuPAC
The ModuPAC output assembly consists of a VI-200 DC to DC converter that converts the high
voltage bus to the desired regulated output voltage. Each ModuPAC can provide up to 200 Watts
of power. Multiple ModuPACs can be paralleled in a driver-booster configuration to provide more
power. ModuPACs are fused with a PC-Tron, DC-rated, fast-acting fuse. A passive LC filter is used
to reduce output ripple/noise down to 1% typical, and 2% maximum peak-to-peak from 10% to
100% of rated load. An optional DC Power Good signal, or output voltage Trim potentiometer can
be specified. The ModuPAC contains overvoltage protection (OVP), overcurrent protection (OCP),
and overtemperature limiting (OTL). The OCP has automatic recovery when the overcurrent con-
dition is removed. The OVP and OTL are latching functions and require recycling of the AC input
power to restart.
JuniorPAC
The JuniorPAC consists of a VI-J00 DC to DC converter that converts the high voltage bus to the
desired regulated output voltage. JuniorPACs can provide up to 100 Watts of output power and are
fused with a single PC-Tron, DC-rated, fast-acting fuse. A passive LC filter is used to reduce out-
put ripple/noise down to 1% typical, and 2% maximum peak-to-peak from 10% to 100% of rated
load. An optional DC Power Good signal or output voltage Trim potentiometer can be specified.
The JuniorPAC contains output overcurrent protection, which recovers automatically when the
overcurrent condition is removed. Overvoltage protection and overtemperature limiting are not
available.
DualPAC
This output assembly consists of two VI-J00 DC to DC converters that convert the high voltage
bus to the desired regulated output voltages as noted above. The outputs are electrically isolated.
For detailed pin out description, refer to pg 9.
RAMPAC
This output assembly consists of a VI-J00 DC to DC converter with a Ripple Attenuator Module
(RAM) and is designed for applications requiring low output ripple/noise. The RAMPAC can
attenuate the ripple/noise down to 10 mV peak-to-peak over a 20 MHz bandwidth from 10% to
100% of rated load of the converter. Outputs from 5V to 50V are available.
BatPAC
The BatPAC output assembly consists of a VI-200 BatMod current source that converts the high
voltage bus to the desired regulated output voltage. The converter is fused with a PC-Tron, DC-
rated, fast-acting fuse. The BatPAC is a 200 Watts programmable current source that can be con-
figured as a battery charger. Maximum current and voltage settings are controlled using poten-
tiometers that come as a standard feature, or through Trim pin access as an option. BatPACs are
available for 12V, 24V and 48V battery systems.
FINPAC
The FinPAC output assembly consists of a Maxi DC to DC converter that converts the unregulat-
ed high voltage bus to the desired regulated output voltage. Each Maxi module can provide up to
600 Watts of output power. Each FinPAC occupies 2 slots because it has an extra large heatsink
attached to dissipate the heat generated by this more powerful Maxi converter. Currently, the
FinPAC is ONLY used in the high power (MX) chassis. It cannot be used in any other member
of the MegaPAC Family. Contact Westcor for future updates.
Rev. 4/2010 Vicor 800-735-6200 Westcor Division 408-522-5280 Applications Engineering 800-927-9474 Pg. 7
PFC MegaPAC Design Guide
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VI-200
ModuPAC
+
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VI-J00
JuniorPAC
VI-J00 VI-J00
M2
M1
M1
M2
DualPAC
+
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VI-J00 RAM
RamPAC
VI-200/BatMOD
+
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BatPAC
+
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Maxi
FinPAC