Specifications

vicorpower.com Applications Engineering: 800 927.9474 Page 3
Brief Technical Description
The MicroPAC power supply is designed to operate using a single phase voltage source input between
85 Vrms and 264 Vrms or 120 to 300 V dc source. The basic building blocks of the MicroPAC are an EMI
filter, Power Factor Correction stage, cooling fan, and housekeeping, associated microcontroller circuits
along with customer interfaces and galvanic isolated outputs and control signals.
PFC Control
+12 V
+5 V
Smart Fan
controller
FAN
Temp detecon on
Boost heatsink
T
Microcontroller
PIC program
Port
+5 V+12 V
+12 V
Interface Connector 1) +5.0 Vdc 2) OV 3) ED 1 4) Over Temp Warning 5) ED 3 6) AC_OK 7) Standby Mode 8) General Shutdown 9) Fan Fault 10) ED 2
11) N/C 12) ED 4
LED Indicators
Reverse logic
BCM_1
ED/1 ED/2 ED/3 ED/4
GSD
Standby Mode
AC_OK
Fan Fault
Over Temp
20 MHz
EMI Filter
House Keeping
Bridge Recfier
85 – 264 Vrms 47 –400 Hz
120 –300 Vdc
External 15 A fuse required
DC
AC
MicroPAC Chassis
PE
PE
PE
BCM_1
BCM_1
BCM_1
Boost Converters
So Start
Isolated Output Isolated Output Isolated Output Isolated Output
Isolated +5 Vdc / 500 mA
+12 V
+5 V
BCM control
Figure 1:
Simple Block Diagram