A8437集成電路（IC）的電源管理-專用規(guī)格書PDF中文資料

A8437屬于集成電路（IC）的電源管理-專用。由Allegro MicroSystems制造生產(chǎn)的A8437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 Allegro?A8437 Xenon photoflash charger IC is designed to meet the needs of ultra-low power, small form factor cameras, particularly camera-phones.

The charge current time is adjustable by setting the charge current limit from 0.4 to 1.2 A maximum. By using primaryside voltage sensing, the need for a secondary-side resistive voltage divider is eliminated. This has the additional benefit of reducing leakage currents on the secondary side of the transformer. To extend battery life, the A8437 features very low supply current draw—typically 0.1 μA in shutdown mode and 10 μA in standby mode.

Features and Benefits

? Low quiescent current draw (0.1 μA in shutdown mode)

? Primary-side output voltage sensing; no resistor divider

required

? User-adjustable current limit from 0.4 to 1.2 A

? 1.1 V logic (VHI(min)) compatibility

? Integrated IGBT driver with separate sink and source (CG

package) or common sink/source (EJ package)

? Flash dual trigger with interlock for increased noise

immunity

? Optimized for mobile phone, 1-cell Li+ battery applications

? No primary-side Schottky diode needed

? Zero-voltage switching for lower loss

? >75 efficiency

? Optional regulation feature to maintain the output voltage

? Charge complete indication

? Integrated 40 V DMOS switch