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IC BLOCK DIAGRAM & DESCRIPTION
IC483 KIA431A(Votage CTL)
Reference
(R)
2.5Vref
IC490 STR-G6651 (Switching Regulator)
Pin No.
1
2
3
4
5
-
-
+
-
Anode
(A)
V
IN
4
START
O.V.P
LATCH
REG.
O.S.C
T.S.D
Sym.
Description
D
Drain terminal
S
Source terminal
GND
Ground terminal
V
Power Supply terminal
IN
Overcurrent/Feedback
O.C.P/F.B
terminal
Overvoltage protection
O.V.P
circuit
Thermal shutdown
T.S.D.
circuit
Cathode
(K)
DRIVE
-
Vth(1)
+
Comp.1
-
Vth(2)
+
Comp.2
Function
MOS FET drain
MOS FET source
Ground
Input of power supply for control
circuit
Input of overcurrent detection signal
and constant voltage control signal
Overvoltage protection circuit
Terminal shutdown circuit
- 22 -
1
D
2
S
O.C.P/F
5
GND
3
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