A8439集成電路（IC）的電源管理-專用規(guī)格書PDF中文資料

A8439屬于集成電路（IC）的電源管理-專用。由Allegro MicroSystems制造生產(chǎn)的A8439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 A8439 is a highly integrated IC that charges photoflash capacitors for digital and film cameras. An integrated MOSFET switch drives the transformer in a flyback topology. It also features an integrated IGBT driver that facilitates the flash discharge function and saves board space.

The CHARGE pin enables the A8439 and starts the charging of the output capacitor. When the designated output voltage is reached, the A8439 stops the charging until the CHARGE pin is toggled again, or when output voltage falls below 90 of the designated value. Pulling the CHARGE pin low stops the charging. The DONE pin is an open-drain indicator of when the designated output voltage is reached.

Features and Benefits

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

? Adjustable output voltage

? Auto-refresh

? >75 efficiency

? Eight-level, digitally-programmable current limit

? Charge complete indication

? Integrated IGBT driver with trigger

? No primary-side Schottky diode needed

? Low-profile package (0.75 mm nominal height)

Applications include the following:

? Digital camera flash

? Film camera flash

? Cell phone flash

? Emergency strobe light