A8426EESTR-T集成電路（IC）的電源管理-專用規(guī)格書PDF中文資料

A8426EESTR-T屬于集成電路（IC）的電源管理-專用。由Allegro MicroSystems制造生產(chǎn)的A8426EESTR-T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應用，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)、負載突降保護、觸覺驅(qū)動器、熱電制冷器控制等。

Description

The A8426 is a highly integrated IC that rapidly charges photoflash capacitors for SLR cameras, digital cameras, and camcorders with integrated digital cameras. A flexible IGBT driver is integrated to save board space.

The A8426 integrates a 3.2 A-capable, 55 V-rated DMOS switch that drives the transformer in flyback configuration, allowing optimized design with tight coupling and high efficiency. The peak switch current is user-adjustable between 1 and 3.2 A, using a resistor to ground. A proprietary control scheme optimizes the capacitor charging time. Low quiescent current and low-power Standby mode current further improve system efficiency and extend battery life.

Features and Benefits

? Wide battery voltage range: 1.5 to 11 V

? Integrated 55 V DMOS switch with 3.2 A current capability

? User-adjustable peak current limit, from 1 to 3.2 A

? Secondary-side voltage sensing for easily-adjustable

output voltage

? >75 efficiency

? Fast charging time

? Charge complete indication

? Flexible, high current IGBT driver

? Independent IGBT driver supply

? Separate sink and source pins with 6 Ω pull-up and

20 Ω pull-down

? Interlocked trigger pins improve noise immunity

? No primary-side Schottky diode needed

Applications include:

? SLR camera flash

? Digital camcorder/DSC combo flash

? 2 Li+ input strobe