Specifications

ConverterPAC Functional Description
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 or between different AC input
MegaPAC chassis. They can be added, moved, or changed as necessary. A key feature of the Extended Length
ConverterPAC is the low ripple and noise output to 10 mV p-p or 0.15%, whichever is greater. The follow-
ing Extended Length ConverterPACs can be used in the PFC MegaPAC/EL - Low Noise.
QPAC (L)
The QPAC output assembly consists of a 1st Generation VI-200 DC to DC
converter that converts the unregulated high voltage bus to the desired regu-
lated output voltage. Each QPAC (L) can provide up to 200 Watts of output
power, and booster QPACs can be added in parallel for more power. Power
and slave QPACs can be added in parallel for more power. QPACs are fused
with a PC-Tron, DC-rated, fast-acting fuse. An active preload ensures the DC
to DC converter operates in its highest noise performance range. As the load
on the module increases, the preload removes itself from the circuit. QPACs
using the VI-200 module have an optional DC OK TTL signal. All QPACs have
overcurrent protection with automatic recovery when the overcurrent condition
is removed. Over Voltage Protection (OVP) and Over Temperature Limiting
(OTL) are available. Please note that for the QPAC (L) the output voltage
from either output terminal to chassis should not exceed 500 Vdc, or peak.
DualQPAC (LD)
The DualQPAC output assembly consists of two 1st Generation VI-J00 DC to
DC converters that provide two isolated output voltages. DualQPACs can pro-
vide up to 100 Watts of output power from each output. The DualQPACs are
fused with a PC-Tron, DC-rated, fast-acting fuse. An active preload ensures the
DC to DC converter operates in its highest noise performance range. OVP and
OTL is not available. Please note that for the QPAC (L) the output voltage
from either output terminal to chassis should not exceed 100 Vdc, or peak.
JuniorQPAC (LJ)
The Junior QPAC output assembly consists of a 1st Generation VI-J00 Vicor
DC to DC converter that converts the unregulated high voltage bus to the
desired regulated output voltage. OVP and OTL is not available. Please note
that for the QPAC (L) the output voltage from either output terminal to
chassis should not exceed 500 Vdc, or peak.
FinQPAC (PFL)
The FinQPAC output assembly consists of a 2nd Gen Maxi DC to DC convert-
er that converts the unregulated high voltage bus to the desired regulated out-
put voltage. Each Maxi module can provide up to 600 Watts of output power.
Each FinQPAC occupies 2 slots because it has an extra large heatsink attached
to dissipate the heat generated by this more powerful 2nd Gen onverter. It can-
not be used in any other member of the MegaPAC Family. PACs using the VI-
200 module have an optional DC OK TTL signal. FinQPACs have overcurrent
protection with automatic recovery when the overcurrent condition is removed.
Over Voltage Protection (OVP) and Over Temperature Limiting (OTL) are
available.Please note that for the FinQPAC (PFL) the output voltage from
either output terminal to chassis should not exceed 500 Vdc, or peak.
Rev. 6/2004 Vicor 800-735-6200 Westcor Division 408-522-5280 Applications Engineering 800-927-9474 Pg. 7
PFC MegaPAC-EL/PFC MegaPAC-High Power Low Noise
+
_
VI-200
VI-200
VI-J00
VI-J00
VI-J00
QPAC
DUALQPAC
JUNIORQPAC
+
_
VI-200
VI-200
FINQPAC
Maxi