DRV8706S-Q1EVM

Automotive H-bridge smart gate driver EVM with wide common mode current sense amplifier

DRV8706S-Q1EVM

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Overview

The DRV8706S-Q1EVM is designed to evaluate the DRV8706S-Q1, which is an integrated, automotive qualified brushed DC motor driver. The DRV8706S-Q1 is a highly integrated H-bridge gate driver, capable of driving high-side and low-side N-channel power MOSFETs. It generates the proper gate drive voltages using an integrated doubler charge pump for the high-side and a linear regulator for the low-side.

The device uses a smart gate drive architecture to reduce system cost and improve reliability. The gate driver optimizes dead time to avoid shoot-through conditions, provides control to decreasing electromagnetic interference (EMI) through adjustable gate drive current, and protects against drain to source and gate short conditions with VDS and VGS monitors.

A wide common mode shunt amplifier provides inline current sensing to continuously measure motor current even during recirculating windows. The amplifier can be used in low-side or high-side sense configurations if inline sensing is not required.

The DRV8706S-Q1 provide an array of protection features to ensure robust system operation. These include under and overvoltage monitors for the power supply and charge pump, VDS overcurrent and VGS gate fault monitors for the external MOSFETs, offline open load and short circuit diagnostics, and internal thermal warning and shutdown protection.

The DRV8706S-Q1EVM has an H-bridge consisting of four N-channel MOSFETs that drive motors bi-directionally at up to 15-A RMS, 20-A peak current. The EVM operates from a single power supply for the analog power and from the USB line for the digital power, which can be customized to be externally supplied. A negative 18 V reverse baterry protection circuit, along with a 20 A RMS rated PI filter are provided to clean up the power supply input and protect against incorrect battery connections.

Features
  • H-bridge smart gate driver EVM for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
    • 4.9-V to 37-V operating range
    • Doubler charge pump for 100% PWM
    • Half-bridge and H-bridge control modes
    • SPI interface for detailed configuration and diagnostics
  • Smart gate drive architecture
    • Adjustable slew rate control
    • 0.5-mA to 62-mA peak source current output
    • 0.5-mA to 62-mA peak sink current output
    • Integrated dead-time handshaking
    • MOSFET drain to source and gate monitors
  • Wide common mode current shunt amplifier
    • Inline sensing
    • Adjustable gain settings (10, 20, 40, 80 V/V)
    • Integrated feedback resistors
    • Adjustable PWM blanking scheme
  • Integrated protection features
    • Dedicated driver disable pin (DRVOFF)
    • Supply and regulator voltage monitors
    • MOSFET VDS overcurrent monitors
    • MOSFET VGS gate fault monitors
    • Charge pump for reverse polarity MOSFET
    • Offline open load and short circuit diagnostics
    • Device thermal warning and shutdown
    • Fault condition interrupt pin (n fault)
Brushed DC (BDC) motor drivers
DRV8706-Q1 Automotive 40-V H-bridge smart gate driver with offline diagnostics & inline current sense am

 

ESD protection & TVS surge diodes
TPD4E004 Quad 0.8-pF, 5.5-V, ±8-kV ESD protection diode with with VCC pin for High Speed Interfaces

 

MSP430 microcontrollers
MSP430F2617 16 MHz MCU with 92KB Flash, 8KB SRAM, 12-bit ADC, Dual 12-bit DAC, I2C/SPI/UART, HW multiplier, DMA

 

N-channel MOSFET transistors
CSD18512Q5B 40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 1.6 mOhm

Get started

  1. Order the DRV8706S-Q1EVM evaluation module
  2. Download the DRV8706S-Q1EVM software
  3. Read the DRV87xx-Q1EVM & DRV8106-Q1EVM user guide and the EVM GUI user guide

Order & start development

TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Type Title Date
* User guide DRV87xx-Q1EVM and DRV8106-Q1EVM User’s Guide (Rev. A) Mar. 12, 2021
User guide DRV87xx-Q1EVM & DRV8106-Q1EVM GUI User's Guide (Rev. A) Oct. 30, 2019
More literature DRV8706S-Q1EVM EU Declaration of Conformity (DoC) (Rev. A) Jul. 30, 2019

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