A4964中文资料Sensorless Sinusoidal Drive BLDC Controller数据手册Allegro规格书

描述 Description

The A4964 is a three-phase, sensorless, brushless DC (BLDC) motor controller for use with external N-channel power MOSFETs and is specifically designed for automotive applications. It is designed to provide the motor control functions in a system where a small microcontroller provides the communication interface to a central ECU and intelligent fault and status handling. The A4964 provides the supply and watchdog for the microcontroller and the high-voltage interfaces between the microcontroller and the central ECU and ignition switch. The A4964 can also operate as an independent singlechip remote motor controller.

The motor is driven using 3-phase sinusoidal current drive where phase commutation is determined, without the need for independent position sensors, by monitoring the motor back-EMF (bemf). The sensorless start-up scheme includes forward and reverse pre-rotation (windmill) detection and synchronization, and allows the A4964 to operate over a wide range of motor and load combinations.

The A4964 can operate with duty cycle (voltage) control, current (torque limit) control, and closed-loop speed control. Control mode, operating mode, and control parameters are programmed through an SPI-compatible serial interface.

A single current sense amplifier provides peak current limiting and average current measurement through the serial interface.

Integrated diagnostics provide indication of undervoltage, overtemperature, and power bridge faults and can protect the power switches under most short-circuit conditions.

The A4964 is provided in a 36-terminal QFN and a 32-lead QFP, both with exposed thermal pad.

特性 Features

• Three-phase sensorless BLDC motor control FET driver
• Three-phase sinusoidal drive with soft start
• Sensorless start-up and commutation
• Windmill detection and synchronization
• Bootstrap gate drive for N-channel MOSFET bridge
• 5.5 to 50 V supply range
• SPI-compatible interface
• Programmable control modes: speed, voltage, current
• Peak current limiting
• Control via SPI or PWM
• Programmable gate drive for slew rate control
• LIN / PWM physical interface with wake
• Logic supply regulator with current limit
• MCU watchdog and reset
• Ignition switch interface
• Diagnostics, status, current, and speed feedback
Typical Applications
• Automotive fuel, oil, and urea pumps
• Automotive fans and blowers

应用 Application

• 汽车燃料、机油和尿素泵
• 汽车风机和鼓风机

简介

A4964属于集成电路（IC）的电机驱动器控制器。由制造生产的A4964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。