Sanyo PLV-Z4 - Page 88

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