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IC Block Diagrams
●
FA7700V, FA7701V <Switching Power Supply Controller,
IC6701, IC7801, IC7821>
+
–
+
P W M
–
+
E R . A M P
ON/OFF
V R E F
O S C
BIAS
U V L O
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
●
LA7217M <Sync Separator, IC202>
●
ICS512MT <PLL, IC381>
●
FA
F
FA770
A
V, FA7701V <S
IC6
witc
01
hin
IC7
g P
01
wer
, IC7
Su
7821
oller
ntro