A8438集成電路（IC）的電源管理-專用規(guī)格書PDF中文資料

A8438屬于集成電路（IC）的電源管理-專用。由Allegro MicroSystems制造生產(chǎn)的A8438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節(jié)、負載突降保護、觸覺驅動器、熱電制冷器控制等。

Description

The A8438 is a highly integrated IC that charges photoflash capacitors for digital and film cameras. It also features an integrated IGBT driver that facilitates the flash discharge function and saves board space.

To charge the photoflash capacitor, the A8438 integrates a 40 V, DMOS switch that drives the transformer in a flyback topology, allowing optimized design with tight coupling and high efficiency. A proprietary control scheme optimizes the capacitor charging time. Low quiescent current and low shutdown current further improve system efficiency and extend battery life.

Features and Benefits

? Power with 1 Li+ or 2 Alkaline/NiMH/NiCAD batteries

? Adjustable output voltage

? >75 efficiency

? Three levels of switch current limit: 1.6, 1.8, 2.0 A

? Fast charge time

? Charge complete indication

? Integrated IGBT driver with trigger

? No primary-side Schottky diode needed

? Low-profile package (0.75 mm nominal height)

Applications include:

? Digital camera flash

? Film camera flash

? Cell phone flash

? Emergency strobe light