DRV8704_V01中文资料德州仪器数据手册PDF规格书

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).