A8425 Datasheet High Current Photoflash Capacitor Charger

Manufacturer: Allegro MicroSystems

Datasheet Details

Part number	A8425
Manufacturer	Allegro MicroSystems
File Size	439.72 KB
Description	High Current Photoflash Capacitor Charger
Download	A8425 Download (PDF)

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 reduction implementation.

A8425 High Current Photoflash Capacitor Charger with IGBT Driver for Two Li+.

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 charge time.
Charge Complete indication.
Flexible, high current IGBT drive.
Independent IGBT driver supply.
Separate sink and source pins with 6 Ω pull-up and 2.

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