Sanyo PLV-Z4 Service Manual page 88

IC Block Diagrams
● FA7701 <Switching power Supply Controller, IC6601>
RT
REF
IN–
FB
● FA7711 <Switching power Supply Controller, IC6621>
RT
IN1+
IN1-
FB1
IN2+
IN2-
FB2
IN3+
IN3-
FB3
1
V R E F
VREF
2.2V
O S C
2
BIAS
Power Good Signal
3
0.88V
+
–
E R . A M P
4
VC VREF
REF.
POWER
ERROR
AMP-1
ERROR
COMPARATOR-1
AMP-1
+
+
-
-
ERROR
COMPARATOR-2
AMP-2
+
+
-
-
ERROR
COMPARATOR-3
AMP-3
+
+
-
-
FB DET.
U V L O
ON/OFF
0.3V
–
+
S.C.P
+
1.5V
–
S.C.DET
2.2V
1.5V
+
–
OFF
ON/OFF
+
–
+
P W M
CS3 CS2 CS1
SOFT
START
UVLO
PWM
PWM
PWM
TIMER
LATCH
CP
-88-
8
CS
7
VCC
5.5V
6
OUT
5
GND
PVCC
PVCC
PVCC
OUT1
PGND
PVCC
OUT2
SEL2
PGND
PVCC
OUT3
SEL3
PGND
PGND
GND