The A3966SA and A3966SLB are designed to drive both windings of a two-phase bipolar stepper motor. Each device includes two H-bridges capable of continuous output currents of ±650 mA and operating voltages to 30 V. Motor winding current can be controlled by the internal fixed-frequency, pulse-width modulated (PWM), current-control circuitry. The peak load current limit is set by the user’s selection of a reference voltage and current-sensing resistors. Except for package style and pinout, the two devices are identical.

FEATURES

■ ±650 mA Continuous Output Current

■ 30 V Output Voltage Rating

■ Internal Fixed-Frequency PWM Current Control

■ Satlington™ Sink Drivers

■ User-Selectable Blanking Window

■ Internal Ground-Clamp & Flyback Diodes

■ Internal Thermal-Shutdown Circuitry

■ Crossover-Current Protection and UVLO Protection

A3966SA属于集成电路（IC） > 电机驱动器，控制器。Allegro MicroSystems制造生产的A3966SA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。