Sanyo DWM-4500 - Page 36

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IC BLOCK DIAGRAM & DESCRIPTION
IC493 UPC37M31TJ-AZ(Regulator)
1
2
3
4
5
1.
2.
3.
4.
5.
Vin
SWOut
GND
Vos
S.S
12
4
53
Vin
S.S GND
SWOut
Vos
INTERNAL
POWER
OVERCURRENT
PROTECTOR
OSC,
GENERATOR
RESET
COMPA-
RATOR
OVERHEAT
PROTECTOR
LATCH
&
DRIVER
ERROR
AMP
VOLTAGE
REFERENCE
IC492, IC494 PQ050DZ01Z(Regulator)
1
Description
DC INPUT
ON/OFF CONTROL
DC OUTPUT
1
2
3
4
5
Symbols
Vin
Vc
Vo
NC
GND
2 3 4 5
Pin No.
IC490 SI-8050RD(Regulator)
1
INPUT
4
OUTPUT
3
GND
5
OUTPUT
2
Starting
circuit
Error
Amp.
Error
Amp.
Voltage reference
circuit
Overheat protect
circuit
Overheat protect
circuit
Drive
circuit
Drive
circuit
Overcurrent
limiting circuit
Rush current
provent circuit
Overcurrent
limiting circuit
Rush current
provent circuit