Description

The A4957 is a full-bridge controller for use with external N-channel power MOSFETs and is specifically designed for applications with high-power inductive loads such as brush DC motors.

Features and Benefits

▪High current gate drive for N-channel MOSFET full bridge

▪Independent control of each MOSFET

▪Charge pump for low supply voltage operation

▪Cross-conduction protection with adjustable dead time

▪4.5 to 50 V supply voltage range

▪Diagnostics output

▪Low current sleep mode

A4957属于集成电路（IC） > 电机驱动器，控制器。Allegro MicroSystems制造生产的A4957电机驱动器，控制器产品属于电机驱动器和控制器电源管理集成电路 (PMIC) 系列，可用于控制或操作从某电源施加到电机或相关机电执行器的电源。所实现的具体功能和特性集根据预期负载和预期应用的特性有很大差异，范围从用于有刷电机的简单开环速度控制到基于步进电机的高级闭环运动控制。