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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 10mV
P-P
or 0.15%,
whichever is greater.
The following Extended-Length ConverterPACs can be used in the
PFC MegaPAC/EL - Low Noise.
QPAC™ (L)
The QPAC output assembly consists of a VI-200™ DC-DC converter that converts the unregulated
high-voltage bus to the desired regulated output voltage. Each QPAC (L) can provide up to 200W 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-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. Overvoltage Protection (OVP) and
Overtemperature Limiting (OTL) are available.
Please note that for the QPAC (L), the output voltage
from either output terminal to chassis should not exceed 400V
DC
, or peak.
DualQPAC™ (LD)
The DualQPAC output assembly consists of two VI-J00 DC-DC converters that provide two isolated
output voltages. DualQPACs can provide up to 100W 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-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 400V
DC
, or peak.
For detailed pinout description, refer to Page 10.
JuniorQPAC™ (LJ)
The JuniorQPAC output assembly consists of a VI-J00 Vicor DC-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 400V
DC
, or peak.
FinQPAC™ (PZL)
The FinQPAC output assembly consists of a Maxi DC-DC converter that converts the unregulated
high-voltage bus to the desired regulated output voltage. Each Maxi module can provide up to 600W
of output power. Each FinQPAC occupies two slots because it has an extra large heat sink attached
to dissipate the heat generated by this more powerful Maxi converter. It cannot be used in any other
member of the MegaPAC Family. FinQPACs have overcurrent protection with automatic recovery when
the overcurrent condition is removed. Overvoltage Protection (OVP) and Overtemperature Limiting (OTL)
are available.
Please note that for the FinQPAC (PZL) the output voltage from either output
terminal to chassis should not exceed 400V
DC
, or peak.
+
_
VI-200
VI-J00
VI-J00
M2
M1
M1
M2
VI-J00
+
_
Maxi
QPAC
DualPAC
JuniorQPAC
FinQPAC
