Sanyo PDG-DXL2000 - Page 46

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IC Block Diagrams
l FA7701 <DC-DC Control, IC5611>
FA7701
+
–
+
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
l FA7703 <DC-DC Control, IC5631>
9121316 15 14 11 10
54
1 2
3 6
7 8
REG VCCCUT1SEL1FB1IN1-REFDT1
RT OUT2GNDFB2IN2-IN2+DT2CS
OSC
Power Good Signal
BIAS
UVL0
BIAS
2.2V
1V
lcs
+ _
_
+
+ + + _ + + + _
+
_ _
+
_
1.5V
1.27V
2.0V
ON/OFF
ON/OFF
S.C.P
S.C.DET
Error AMP1
Error AMP2
Pedestal
Voltage
PWM
Comparator1
PWM
Comparator2