A3974SED-T集成电路（IC）的电机驱动器控制器规格书PDF中文资料

A3974SED-T属于集成电路（IC）的电机驱动器控制器。由Allegro MicroSystems制造生产的A3974SED-T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。

DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER

Designed for pulse-width modulated (PWM) current control of two dc motors, the A3974SED is capable of output currents to ±1.5 A and operating voltages to 50 V. Internal fixed off-time PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes.

Independant ENABLE input terminals are provided for use in controlling the speed and torque of each dc motor with externally applied PWM control signals.

Synchronous rectification circuitry allows the load current to flow through the low rDS(on) of the DMOS output driver during the current decay. This feature will eliminate the need for external clamp diodes in most applications, saving cost and external component count, while minimizing power dissipation.

FEATURES

■ ±1.5 A, 50 V Continuous Output Rating

■ Low rDS(on) DMOS Output Drivers

■ Programmable Slow, Fast, and Mixed Current-Decay Modes

■ Serial-Interface Controls Chip Functions

■ Synchronous Rectification for Low Power Dissipation

■ Internal UVLO and Thermal Shutdown Circuitry

■ Crossover-Current Protection

■ Sleep and Idle Modes