A3941K中文资料A3941K: Automotive Full Bridge MOSFET Driver数据手册Allegro规格书

描述 Description

The A3941 is a full-bridge controller for use with external N-channel power MOSFETs and is specifically designed for automotive applications with high-power inductive loads, such as brush DC motors.
A unique charge pump regulator provides full (>10 V) gate drive for battery voltages down to 7 V and allows the A3941 to operate with a reduced gate drive, down to 5.5 V.
A bootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs. An internal charge pump for the high-side drive allows DC (100% duty cycle) operation.
The full bridge can be driven in fast or slow decay modes using diode or synchronous rectification. In the slow decay mode, current recirculation can be through the high-side or the lowside FETs. The power FETs are protected from shoot-through by resistor adjustable dead time.
Integrated diagnostics provide indication of undervoltage, overtemperature, and power bridge faults, and can be configured to protect the power MOSFETs under most short circuit conditions.
The A3941 is supplied in a 28-pin TSSOP power package with an exposed thermal pad (suffix LP). This package is lead (Pb) free, with 100% matte-tin leadframe plating.
Allegro's A3941 is a Quality Managed (QM) product that has been developed according to the automotive quality requirements of TS 16949 and contains features targeted for automotive safety applications. This product can be qualified for use in accordance with ISO 26262 in compliant safety systems by ensuring a robust integration of the component into the system design. Safety documentation will be provided to support and guide the integration process.

特性 Features

•High current gate drive for N-channel MOSFET full bridge
•High-side or low-side PWM switching
•Charge pump for low supply voltage operation
•Top-off charge pump for 100% PWM
•Cross-conduction protection with adjustable dead time
•5.5 to 50 V supply voltage range
•Integrated 5 V regulator
•Diagnostics output
•Low current sleep mode

简介

A3941K属于集成电路（IC）的电机驱动器控制器。由制造生产的A3941K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。