Panasonic DMR-EZ27P Service Manual page 43

IC1150
SWITCHING IC
IC-DETAIL BLOCK DIAGRAM
UVLO UVLO
+ +
LATCH RELEASE/
- -
OVER VOLTAGE
PROTECTOR/
OVER HEATING VCC(START) VCC(STARTUP OFF)
PROTECTOR /VCC(STOP) /VCC(STARTUP ON)
IDP(LIMIIT/
BURST)SENS.
Z/C ZERO CURRENT
1
DET./ONDEAD TIMER
CONTROL SOFT-DRIVE
CIRCUIT CIRCUIT
STANDBY
CIRCUIT
FB
2
ON WIDTH
TIMER
IC1500
ANA +3.3V SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
8 7 6
VIN
DRIVER
REFERENCE
CURRENT
LIMITTER
THERMAL
SHUTDOWN
VOUT CN
1 2 3
IC1510
XSW +5.2V SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
Vin
VCC 1
4
DRAIN
START-UP
5
CONT
CIRCUIT
3
IC1520
DC-DC CONVERTER
IC-DETAIL BLOCK DIAGRAM
8
CS
GND
3
LEVEL
SHIFT
V5
UVLOcomp
+
-
VREF
VIN
1
5
CONT
BIAS
IC1530
D +5V SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
1
GND
4
43
Vout
5
+
ON/OFF
-
Circuit
Ref.Voltage
Circuit
GND
2
7 6 5
EXT GND FB
0.8V
CONTROL LOGIC
+ -
CNT.
COMP
- - + +
V5/PWON VREF/SS CC
2 3 4
VIN VOUT
2
VC
IC
4
GND
3
DMR-EZ27P / DMR-EZ27PC
IC1540
DR +5V SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
IC
VIN ON H VOUT SENSE GND
1 2 3 4 5
IC1550
D +5V SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
5 1
VOUT VIN
IC
NC GND CNT
4 2 3
IC1560
JC +5V SWITCHING REGULATOR
IC-DETAIL BLOCK DIAGRAM
7 6 5
VIN ON: H
SUB
DRIVER BIAS
CURRENT THERMAL
LIMITTER SHUTDOWN
REFERENCE
VOUT NC GND CN
1 2 3 4
IC1150 Detail Block Diagram
IC1500 Detail Block Diagram
IC1510 Detail Block Diagram
IC1520 Detail Block Diagram
IC1530 Detail Block Diagram
IC1540 Detail Block Diagram
IC1550 Detail Block Diagram
DMR-EZ27P/PC IC-Detail Block Diagram