M54641L/FP

Rev.1.0, Sep.19.2003, page 3 of 8

Block Diagram

Power supply

Output power supply

Constant voltage

source

Output voltage control

Output 2

Output 1

Input

circuit

Input

circuit

Control

circuit

Output

circuit

Output

circuit

GND

Though the IC is equipped with a thermal shutdown circuit for prevention against thermal breaking, the threshold

temperature is set to 100°C min. Set the driving current in such a way that this thermal shutdown circuit cannot operate

during normal operation.

Output

GND

Output circuit

Input circuit

1

2

GND

15k

1k

IN

Input