DRV8704EVM: 50 ~ 400mA, 8 ~ 52V, Dual H-Bridge Brushed DC Motor Driver

Summary

The DRV8704 customer EVM is a platform built around the DRV8704, a dual H-bridge brushed DC motor driver with highly-configurable power stage. This device is optimized to drive two different brushed DC motors with variable current limiting and an internal 5-V LDO for powering peripheral devices.

The EVM includes two 555-timer circuits configured to switch at approximately 25 kHz with independentlyvariable duty-cycles. Each 555 timer is tied to a jumper pin allowing the user to select which channel ofthe DRV8704 is receiving the PWM signal. This analog generation of PWM signals allows for standalone use of the EVM without any firmware being flashed onto a microcontroller.

If the user would like to control the EVM using an MCU, the two 10×1, 100-mil headers can be docked to TI's MSP430™ LaunchPad™ and controlled using whatever firmware is supplied by the user. SPIcommands can be written or read by simply docking the EVM to a LaunchPad or tying into the 4 SPI pinswith another MCU.

Features:

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
VM Undervoltage Lockout (UVLO)
Gate Driver Fault (PDF)
Overcurrent Protection (OCP)
Thermal Shutdown (TSD)
Fault Condition Indication Pin (nFAULT)
Fault Diagnostics through SPI

Specifications

Manufacturer	Texas Instruments
Category	Motor Control
Eval Board Part Number	296-44433-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Voltage In	8 ~ 52 V
Number of Motors and Type	2, DC Brush Motors
Power / Current Out	50 ~ 400 mA
Features	Fault Indication Light Load Mode Over Current Protection PWM Interface SPI Interface Thermal Protection Under Voltage Protection, Brown-Out
Component Count + Extras	48 + 28
Application / Target Market	Robotics Textile Machinery
Design Author	Texas Instruments
Main I.C. Base Part	DRV8704
Date Created By Author	2015-11
Date Added To Library	2024-06