A3950中文资料DMOS全桥式电动机驱动器数据手册Allegro规格书

描述 Description

Designed for PWM (pulse width modulated) control of DC motors, the A3950 is capable of peak output currents to ±2.8 A and operating voltages to 36 V.

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 lower power dissipation during PWM operation.

Internal circuit protection includes motor lead short-to-supply / short-to-ground, thermal shutdown with hysteresis, undervoltage monitoring of VBB and VCP, and crossover-current protection.

The A3950 is supplied in a thin profile (<1.2 mm overall height) 16 pin TSSOP package (LP), and a very thin (0.75 mm nominal height) QFN/MLP package. Both packages provide an exposed pad for enhanced thermal dissipation, and are lead (Pb) free with 100% matte tin leadframe plating.

特性 Features

• Low RDS(on) outputs
• Overcurrent protection
• Motor lead short-to-supply protection
• Short-to-ground protection
• Sleep function
• Synchronous rectification
• Diagnostic output
• Internal undervoltage lockout (UVLO)
• Crossover-current protection

简介

A3950属于集成电路（IC）的电机驱动器控制器。由制造生产的A3950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。