Primary Overvoltage
Detection
IC4(1/2), Q18
Vce Voltage
(AC UNIT)
Primary Input
(AC UNIT)
Overcurrent
Detection Circuit
Q15
Drive Circuit
Power Control
Bleeder Circuit
Q14,16,17,19
Q1~10
Q11~13
IC3(1/2)
MAX CC
Error Amp
IC4(2/2)
Current Detection
Circuit
R46,IC1
Voltage Regulator
IC2
+5
+15 -15
Bleeder Circuit
Q20
Control
(CONTROL UNIT)
CC Monitor
(CONTROL UNIT)
OUTPUT-
+15
-15 GND -3.5V
MOTHER UNIT
OCP
Primary OVP
Overheat Detection
TS1
OHP
(CONTROL UNIT)
POWER SUPPLY UNIT (X68-1970-0X)
PDS20-18/PDS36-10/PDS60-6
14
BLOCK DIAGRAM
PDS-20-18(K)
1,1(
98.12.3
17:07
y[W
14