DRV8704集成电路（IC）的电机驱动器控制器规格书PDF中文资料

DRV8704属于集成电路（IC）的电机驱动器控制器。由德州仪器制造生产的DRV8704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。

1 Features

1• Pulse Width Modulation (PWM) Motor Driver

– Drives External N-Channel MOSFETs

– PWM Control Interface for Dual DC Motors

– Supports 100% PWM Duty Cycle

• 8-V to 52-V Operating Supply Voltage Range

• Adjustable Gate Drive (4 Levels)

– 50-mA to 200-mA Source Current

– 100-mA to 400-mA Sink Current

• Integrated PWM Current Regulation

• Flexible Decay Modes

– Automatic Mixed Decay Mode

– Slow Decay

– Fast Decay

– Mixed Decay (Adjustable Percent Fast)

• Highly Configurable SPI

• Torque DAC to Digitally Scale Current

• Low-Current Sleep Mode (65 μA)

• 5-V, 10-mA LDO Regulator

• Thermally-Enhanced Surface-Mount Package

– 38-Pin HTSSOP (PowerPAD)

SPACER

• Protection Features

– VM Undervoltage Lockout (UVLO)

– Gate Driver Fault (PDF)

– Overcurrent Protection (OCP)

– Thermal Shutdown (TSD)

– Fault Condition Indication Pin (nFAULT)

– Fault Diagnostics through SPI

2 Applications

• Automatic Teller and Money Handling Machines

• Office Automation Machines

• Factory Automation and Robotics

• Textile Machines

3 Description

The DRV8704 is a dual-brushed motor controller for

industrial equipment applications. The device controls

external N-channel MOSFETs configured as two Hbridges.

Motor current can be accurately controlled using

adaptive blanking time and various current decay

modes, including an automatic mixed decay mode.

A simple PWM interface allows easy interfacing to

controller circuits. A SPI serial interface is used to

program the device operation. Output current

(torque), gate drive settings, and decay mode are all

programmable through a SPI serial interface.

Internal shutdown functions are provided for

overcurrent protection, short-circuit protection, gate

driver faults, undervoltage lockout (UVLO), and

overtemperature. Fault conditions are indicated by a

FAULTn pin, and each fault condition is reported by a

dedicated bit through SPI.

The DRV8704 is packaged in a PowerPAD™ 38-pin

HTSSOP package with thermal pad (Eco-friendly:

RoHS & no Sb/Br).