A8426中文资料High Performance Photoflash Capacitor Charger with IGBT Driver数据手册Allegro规格书

描述 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.

The A8426 is available in a 16-contact 3 mm × 3 mm TQFN package with exposed pad for enhanced thermal performance. This small, very thin profile (0.75 mm nominal overall height) package is ideal for space-constrained applications. It is lead (Pb) free, with 100% matte-tin leadframe plating.

This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available. Date of status change: June 30, 2017

Deadline for receipt of LAST TIME BUY orders: June 30, 2017.

Applications include:

SLR camera flashDigital camcorder/DSC combo flash2 Li+ input strobe

特性 Features

• 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 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

简介

A8426属于集成电路（IC）的电源管理-专用。由制造生产的A8426电源管理 - 专用专用型电源管理集成电路 (PMIC) 用于电源的控制或操作，适合特定或小范围的目标应用，例如汽车气囊管理、电容器组平衡、AC 公共电力监控、存储器总线端接、接地故障检测、能量收集、小型引擎管理、处理器或芯片集专用电压调节、负载突降保护、触觉驱动器、热电制冷器控制等。