Specifications

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1-800-927-9474
20-17
ConverterPAC Functional Descriptions (cont)
The JuniorPAC contains output overcurrent protection which recovers automatically when the
overcurrent condition is removed. Overvoltage and overtemperature protection are not available.
DualPAC
This output assembly consists of two VI-J00 DC-DC converters that convert the unregulated high
voltage bus to the desired regulated output voltages. The assembly is fused with a single PC-Tron
3A fast-acting fuse. The output of each converter contains a passive LC filter to reduce output
ripple/noise to 1% (typ.), and 2% (max.) when measured peak to peak up to a 20 MHz bandwidth
from 10% to 100% of rated load of the ConverterPACs. To meet VXI noise level standards the
“V2” option can be selected for outputs up to 15Vdc, and the “V1” option can be selected for 24Vdc
outputs. Option “V2” limits output ripple/noise to 50 mV peak to peak and option “V1” limits
output ripple/noise to 150 mV peak to peak. An optional output voltage adjustment potentiometer
may be specified for each output. DC Power Good signal is not available. When using the
Enable/Disable feature on any MegaPAC, both outputs on a DualPAC are controlled simultaneously.
The DualPAC contains output overcurrent protection which recovers automatically when the
overcurrent condition is removed. Overvoltage and overtemperature protection are not available.
RAMPAC
This output assembly consists of a VI-J00 DC-DC converter with a Ripple Attenuator Module
(VI-RAM) and is often used in applications requiring low output ripple/noise. The RAMPAC
attenuates the ripple/noise down to 10 mV when measured peak to peak over a 20 MHz
bandwidth from 10% to 100% of rated load of the converter. The converter is also fused at the
input with a PC-Tron 3A fast-acting fuse. An optional DC Power Good signal, or output voltage
adjustment potentiometer may be specified.
The RAMPAC contains output overcurrent protection which recovers automatically when the
overcurrent condition is removed. Overvoltage and overtemperature protection are not available.
BatPAC
The BatPAC output assembly consists of a VI-200 BatMod current source that converts the
unregulated input voltage to the desired regulated output current or voltage. The converter is
fused with a PC-Tron fast-acting fuse in the positive input terminal. This is a programmable
current source that may be configured as a battery charger. Overvoltage and overtemperature
protection are not available. Maximum current and voltage settings are made using
potentiometers that come as a standard feature. An option to control these maximum settings
externally is also available.
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.
BatPAC N/A Std. N/A N/A Std. N/A Std.
OVP: Overvoltage Protection RS: Remote Sense
OCP: Overcurrent Protection LS: Local Sense
OTP: Overtemperature Protection PG: Power Good
Table 2.
Summary of
ConverterPAC
Features
MegaPAC™ Family AC-DC, DC-DC Switchers