AT1454/AT1454A/AT1454B

Preliminary Product Information

Photoflash Capacitor Charger for DSC

7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

3/24/2006 REV:1.2

1

Feature

Range.

Application

Description

The AT1454 series is a charger IC for Photoflash

capacitor with soft-start function, an IGBT driver

for igniting flash tube, adjustable output voltage

and adjustable switch on-time to perform energy

transition on each charge cycle. The output voltage

can be adjusted by simply changing the turn ratio

of transformer. AT1454B is sensed by voltage

divider connecting to the anode of the rectifying

diode. The voltage sensing path is cut off when

charging function to be completed to maintain

minimum output voltage decay.

The device allows user to control automatic refresh

rate on Charge pin. While the Ready pin signals

that the capacitor is fully charged.

AT1454/AT1454A/AT1454B

is

available

in

MSOP-10 package.

Block Diagram

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