A3959集成电路（IC）的电机驱动器控制器规格书PDF中文资料

A3959属于集成电路（IC）的电机驱动器控制器。由Allegro MicroSystems制造生产的A3959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

Designed for pulse width modulated (PWM) current control of DC motors, the A3959 is capable of output currents to ±3 A and operating voltages to 50 V. Internal fixed off-time PWM current control timing circuitry can be adjusted via control inputs to operate in slow, fast, and mixed current-decay modes.

PHASE and ENABLE input terminals are provided for use in controlling the speed and direction of a DC motor with externally applied PWM-control signals. Internal synchronous rectification control circuitry is provided to reduce power dissipation during PWM operation.

Internal circuit protection includes thermal shutdown with hysteresis, undervoltage monitoring of supply and charge pump, and crossover-current protection. Special power-up sequencing is not required.

Features and Benefits

▪ ±3 A, 50 V Output Rating

▪ Low rDS(on) Outputs (270 mΩ, Typical)

▪ Mixed, Fast, and Slow Current-Decay Modes

▪ Synchronous Rectification for Low Power Dissipation

▪ Internal UVLO and Thermal-Shutdown Circuitry

▪ Crossover-Current Protection

▪ Internal Oscillator for Digital PWM Timing