Vicor Autoranging MegaPAC AC-DC Switcher - Manual (Page 6)

UG:106 vicorpower.com Applications Engineering: 800 927.9474 Page 6
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 and between different AC input MegaPAC chassis. They can be added, moved,
or changed as necessary. The following ConverterPACs can be used in the
Autoranging MegaPAC.
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
condition 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 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 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.
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 (or 0.15%
whichever is greater) over a 20 MHz bandwidth from 10% to 100% of rated load of the
converter.
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 configured as a battery charger. Maximum current and voltage
settings are controlled using potentiometers that come as a standard feature, or through
Trim pin access as an option. BatPACs are available for 12V, 24V and 48V battery
systems.
+
_
Remote Sense
VI-200
Output Adjust
- Vout
+ Vout
DC OK (Power Good)
+
_ VI-J00
Remote Sense
Output Adjust
- Vout
+ Vout
DC OK (Power Good)
Remote Sense
Output #2 Adjust
Output #2
Output #1
Remote Sense
Output #1 Adjust
VI-J00 VI-J00
M2 M1
M1
M2
+
_ VI-J00 RAM
Remote Sense
Output Adjust
- Vout
+ Vout
DC OK (Power Good)
+ Vout
VI-200/BatMOD
- Vout
Remote Interface
Voltage Limit Adjust
Current Limit Adjust
+
_
ModuPAC
JuniorPAC
DualPAC
RAMPAC
BatPAC
End of Life - Not Recommended for New Designs