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DFX-8500
Rev. B
2-1
4
2.2.1 Power Supply Overview
Figure 2-14 shows a block diagram of the C204 PSB/PSE board.
Fuse
Power
SW.
AC Inlet
AC Source
Input Filter
Circuit
Rectifier
Circuit
Surge Cut
(at Power On)
Smoothing
Circuit
+37V Line
Switching
1/2
+37V Line
Switching
2/2
Smoothing
Circuit
PC101
Power Down
Control
+37V
(VP1/VP2)
PC102
Constant
Voltage
Control
Current Limit
Monitoring
Over Current
Protection
GP1
GP2
GP1
GP2
CL
PD
PC1
Over Voltage
Protection
+5V Regulator
Smoothing
Circuit
PC201
Constant
Voltage
Control
Current Limit
Monitoring
+37V
(VP3)
GP3
DRERR
Fan Driver
GP3
FANDR
+5V Regulator
Circuit
+5V
GL
GP
GL
Abnormal
Current
(VP1/VP2)
Monitoring
GP
VP3 Down
Monitoring
SD
CN3
CN4
CN2
CN5
CN1
L
N
T1
T2
Overcurrent
Protection
Figure 2-14. Power Supply Board Block Diagram