A8425 Datasheet - Allegro

A8425 High Current Photoflash Capacitor Charger

The A8425 charges photoflash capacitors for digital cameras, camcorders, and DSC combos. An integrated 55 V DMOS switch drives the transformer in a flyback topology optimized for 2-cell Li+ battery input. An integrated IGBT driver with separate source and sink pins allows high performance red-eye re.

A8425 Features

* ▪ Wide battery voltage range: 1.5 to 11 V ▪ Integrated 55 V DMOS switch in very thin profile 3 mm × 3 mm, 0.75 mm nominal height package ▪ Peak current limit continuously adjustable from 1.0 to 3.2 A ▪ Output voltage sensing on primary side: no resistor divider required ▪ >75% efficiency ▪ Fast char

A8425-Allegro.pdf