A3977集成电路（IC）的电机驱动器控制器规格书PDF中文资料

A3977属于集成电路（IC）的电机驱动器控制器。由Allegro MicroSystems制造生产的A3977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。

Description

The A3977 is a complete microstepping motor driver, with builtin translator. It is designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes, with output drive capability of 35 V and ±2.5 A. The A3977 includes a fixed off-time current regulator that has the ability to operate in slow-, fast-, or mixed-decay modes. This current-decay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power dissipation.

Features and Benefits

▪ ±2.5 A, 35 V output rating

▪ Low rDS(on) outputs, 0.45 Ω source, 0.36 Ω sink typical

▪ Automatic current decay mode detection/selection

▪ 3.0 to 5.5 V logic supply voltage range

▪ Mixed, fast, and slow current decay modes

▪ Home output

▪ Synchronous rectification for low power dissipation

▪ Internal UVLO and thermal shutdown circuitry

▪ Crossover-current protection