Sanyo DC-PT80 - Page 23

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IC480 SI-8050(Switching Regulator)
IC BLOCK DIAGRAM & DESCRIPTION
IC441 LC75348M (Electric Volume)
LOGIC
CIRCUIT
LOGIC
CIRCUIT
CCB
INTERFACE
ZERO
CROSSDET
ZERO
CROSSDET
15
14
16
17
18
19
20
21 22 24 25 2623
10 9 7 6 58
11
L4
L3
L2
L1
NC
NC
R1
R2
R3
R4
RSELO RIN RTRE RBASS1 RBASS2 ROUT
LSELO LIN LTRE LBASS1 LBASS2 LOUT
TEST
VSS
CE
DI
CL
VDD
Vref
TIM
12
13
1
2
30
29
28
27
4
3
LVref
RVref
MULTIPLEXER
MULTIPLEXER
CONTROL
CIRCUIT
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