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IC BLOCK DIAGRAM & DESCRIPTION
Anode
(A)
Cathode
(K)
Reference
(R)
2.5Vref
+
-
IC483 KIA431A(Votage CTL)
IC490 STR-G6351 (Switching Regulator)
DCP Comp.
UVI.O
+
-
+
-
+
-
+
-
+
-
4
REG
OSC
1
2
5
3
V
IN
D
S
OCP/FB/Tri
GND
Terminal No.
Symbols
Description
Functions
1
2
3
Drain terminal
Source terminal
Ground terminal
Overcurrent/Feedback/
Latch trigger terminal
MOSFET drain
MOSFET source
Ground
Input of overcurrent detection signal/
constant voltage control signal/
latch circuit operation signal
D
S
GND
OCP/F.B/Tri
5
4
Input of power supply for control circuit
V
IN
Power Supply terminal
Latch
Delay
Drive
REG
5 Q
K
Internal Blas
PWM Latch
Icanl
OVP
TSD
Tri
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