vicorpower.com
Applications Engineering: 800 927.9474
Page 4
PFC Control
+12 V
+5 V
Smart Fan
controller
FAN
Temp detecon 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 Recfier
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
Is5 Vdc / 500 mA
+12 V
+5 V
BCM control
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.
Figure 1.
Simplified
MicroPAC
Block Diagram
