Description

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.

Features and Benefits

? 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

20 Ω pull-down

? Interlocked trigger pin improves noise immunity

? No primary-side Schottky diode needed

Applications include:

? SLR camera flash

? Digital camcorder/DSC combo flash

? 2 Li+ input strobe

A8425屬于集成電路（IC） > 電源管理 - 專用。Allegro MicroSystems制造生產(chǎn)的A8425電源管理 - 專用專用型電源管理集成電路 (PMIC) 用于電源的控制或操作，適合特定或小范圍的目標(biāo)應(yīng)用，例如汽車氣囊管理、電容器組平衡、AC 公共電力監(jiān)控、存儲器總線端接、接地故障檢測、能量收集、小型引擎管理、處理器或芯片集專用電壓調(diào)節(jié)、負(fù)載突降保護、觸覺驅(qū)動器、熱電制冷器控制等。