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AT1453

Preliminary Product Information

Photoflash Capacitor Charger for DSC

Features

鈥?2.5 to 5.5V supply voltage operating range.

鈥?Low current consumption: 1mA in operation,

鈥?50 kHz or 100kHz operation frequency .

鈥?Built-in maximum duty control.

鈥?push-pull output.

鈥?Built-in soft start circuit.

鈥?Built-in auto-discharge function.

General Description

The AT1453 is a charger control IC for Photoflash

capacitor with soft start function, adjustable

maximum duty cycle and auto-discharge circuit.

Adjustable soft start is programmed with an

external capacitor on SS pin. It is ideal for DSC

flash unit.

Applications

鈥igital Still Cameras flash unit

Block Diagram

VCC

READY

GND

Reference

Output

Control

Block

OUT

SS

DUTY

Vref

1.1V

CHARGE

Enable

Block

FB

Aimtron reserves the right without notice to change this circuitry and specifications.

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

WWW:

http://www.aimtron.com.tw

Fax: 886-3-563-0879

Email:

service@aimtron.com.tw

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