Panasonic DMR-EH75VP Service Manual page 73

IC11201
SWITCHING IC
IC-DETAIL BLOCK DIAGRAM
UVLO UVLO
+ +
LATCH RELEASE/
- -
OVER VOLTAGE
PROTECTOR/
VCC(START)
OVER HEATING VCC(STARTUP OFF)
/VCC(STOP) /VCC(STARTUP ON)
PROTECTOR
IDP(LIMIIT/
BURST)SENS.
Z/C ZERO CURRENT
1
DET./ONDEAD TIMER
CONTROL SOFT-DRIVE
CIRCUIT CIRCUIT
STANDBY
CIRCUIT
OCP THRESHOLD
COMPARATOR/
FB RESTERT
2 BURST MODE
TIMER
OCP THRESHOLD
COMPARATOR
ON WIDTH
TIMER
GND
3
IC11601
DR +5V SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
8 7 6
CS EXT GND
LEVEL CONTROL LOGIC
SHIFT
CNT.
COMP
- - + +
V5
UVLOcomp
+
-
VREF
VIN V5/PWON VREF/SS
1 2 3
IC11602
RESET IC
IC-DETAIL BLOCK DIAGRAM
5 9
VIN DRAIN
VCC
7
5
VDD
-
START-UP
+
CIRCUIT
Vref
IC11720
F+ SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
5
8 7
VIN NC
FB
0.8V
+ -
DRIVER
CURRENT
LIMITTER
REFERENCE
VOUT NC
1 2
CC
4
VOUT
4
LATCH RELEASE/
OVER VOLTAGE
PROTECTOR/
OVER HEATING
PROTECTOR
GND CT
2 3
Z/C
ZERO CURRENT
1
DET./ONDEAD TIMER
STANDBY
CIRCUIT
FB
2
ON WIDTH
TIMER
6 5
NC CONT
BIAS
THERMAL
SHUTDOWN
CN GND
3 4
73
IC11301
SWITCHING IC
IC-DETAIL BLOCK DIAGRAM
VCC
UVLO UVLO
+ + DRAIN
START-UP
- - CIRCUIT
VCC(START) VCC(STARTUP OFF)
/VCC(STOP) /VCC(STARTUP ON)
IDP(LIMIIT/
BURST)SENS.
CONTROL SOFT-DRIVE
CIRCUIT CIRCUIT
GND
3
IC11801
D +3.8V SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
8 7 6 5
CS EXT GND FB
0.8V
CONTROL LOGIC
LEVEL + -
SHIFT
CNT.
COMP
- - + +
V5
UVLOcomp
+
-
VREF
VIN PWON VREF/SS CC
1 2 3 4
IC11201 Detail Block Diagram
IC11301 Detail Block Diagram
IC11601 Detail Block Diagram
IC11602 Detail Block Diagram
IC11720 Detail Block Diagram
IC11801 Detail Block Diagram
DMR-EH75VP IC-Detail Block Diagram
DMR-EH75VP
4
5