Vicor DC MegaPAC DC-DC Switcher - Manual (Page 7)

Rev. 3/04 Vicor 800-735-6200 Mission Power Solutions (760) 631-6846 (phone) or (760) 631-6972 (fax) Pg. 7
DC MegaPAC Operator’s Manual
should be configured so all boosters are placed in the slots to the immediate right of the driver when looking at the
output end of the MegaPAC.
Prior to removing or installing ConverterPACs, you must remove power from the MegaPAC and wait 5 min-
utes. Failure to do so can result in personal injury or damage to the supply.
Take standard ESD precautions when handling ConverterPACs.
Removing ConverterPACs
ConverterPACs can be removed by loosening the captive screw at the base. Once this screw has been loosened, the
ConverterPAC will slide out of the chassis. Once a ConverterPAC has been removed, the empty slot MUST be
filled with either another ConverterPAC or an airblock. If the slot is left empty, it will provide an airflow
escape, significantly degrade thermal performance, and can cause failure.
Installing ConverterPACs as Drivers
ConverterPACs can be installed in empty slots by simply sliding in the new ConverterPAC and securing the screw
at the base. Power and interface connections can be made after the ConverterPAC has been installed.
Installing Booster ModuPACs to Increase Output Power
ConverterPACs can be paralleled for more power. Additional power to an output is obtained by connecting one or
more boosters in parallel with a single driver. The driver can be placed in any open slot. All boosters should be
inserted in the slots to the immediate right of the driver as viewed from the output end of the MegaPAC. Figure 6
shows a driver placed in slot #1 and 3 boosters placed in slot #s 2 to 4. After inserting the driver and boosters, they
are paralleled using bus bars across the positive and negative output studs. Drivers should not be paralleled with
each other. For help in identifying boosters and drivers, refer to the section on MegaPAC Part Numbers.
Figure 6. Paralleling ConverterPACs
ConverterPAC Feature Summary
ConverterPAC OVP OCP OTP RS LS PG TrimPot
ModuPAC Std Std Std Std Opt Opt Opt
DualPAC N/A Std N/A Std Opt N/A Opt
JuniorPAC N/A Std N/A Std Opt Opt Opt
RAMPAC N/A Std N/A Std Opt Opt Opt
OVP Overvoltage Protection (latching) RS Remote Sense
OCP Overcurrent Protection (auto-recovery) LS Local Sense
OTP Overtemperature Protection (latching) PG Power Good (DC OK)
Table 1. Summary of ConverterPAC Features