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IC11201
SWITCHING IC
IC-DETAIL BLOCK DIAGRAM
LATCH RELEASE/
OVER VOLTAGE
PROTECTOR/
OVER HEATING
PROTECTOR
Z/C
ZERO CURRENT
1
DET./ONDEAD TIMER
STANDBY
CIRCUIT
FB
2
ON WIDTH
TIMER
GND
IC11601
DR +5V SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
8
CS
LEVEL
SHIFT
V5
UVLOcomp
+
-
VREF
VIN
1
UVLO
UVLO
+
+
-
-
VCC(START)
VCC(STARTUP OFF)
/VCC(STOP)
/VCC(STARTUP ON)
IDP(LIMIIT/
BURST)SENS.
CONTROL
SOFT-DRIVE
CIRCUIT
CIRCUIT
OCP THRESHOLD
COMPARATOR/
BURST MODE
OCP THRESHOLD
COMPARATOR
3
7
6
EXT
GND
CONTROL LOGIC
CNT.
COMP
-
- +
+
V5/PWON
VREF/SS
2
3
5
9
VIN
DRAIN
VCC
7
START-UP
CIRCUIT
RESTERT
TIMER
5
FB
0.8V
+
-
CC
4
IC11602
RESET IC
IC-DETAIL BLOC
5
VDD
-
+
Vref
GND
2
IC11720
F+ SWITCHING R
IC-DETAIL BLOC
8
7
VIN
NC
DRIVER
CURRENT
LIMITTER
REFERENCE
VOUT
NC
1
2
73
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