A3959中文资料DMOS全桥PWM电机驱动器 (DMOS FULL-BRIDGE PWM MOTOR DRIVER)数据手册Allegro规格书

描述 Description

Designed for pulse-width modulated (PWM) current control of dc motors, the A3959SB, A3959SLB, and A3959SLP are 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.
The A3959SB/SLB/SLP is a choice of three power packages, a 24-pin plastic DIP with a copper batwing tab (package suffix 'B'), a 24-lead plastic SOIC with a copper batwing tab (package suffix 'LB'), and a thin (The A3959SB-T package variant is discontinued. Samples are no longer available.Date of status change: June 1, 2016.
Recommended Substitutions: For existing customer transition, and for new customers or new applications, refer to the A3959SLPTR-T and A3959SLBTR-T.

特性 Features

•±3 A, 50 V Output Rating
•Low rDS(on) Outputs (270 milliohms, 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

简介

A3959属于集成电路（IC）的电机驱动器控制器。由制造生产的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。