DRV8705H-Q1EVM

Automotive H-bridge smart gate driver EVM with low-side current sense amplifier

DRV8705H-Q1EVM

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Overview

The DRV8705H-Q1EVM is designed to evaluate the DRV8705H-Q1, which is an integrated, automotive qualified brushed DC motor driver. The DRV8705H-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 shunt amplifier provides low side current sensing to continuously measure motor current.

The DRV8705H-Q1 provide an array of protection features to ensure robust system operation. These include under and over voltage monitors for the power supply and charge pump, VDS overcurrent and VGS gate fault monitors for the external MOSFET, and internal thermal warning and shutdown protection.

The DRV8705H-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
  • 4.9-V to 37-V, up to 15-A RMS, 20-A peak current H-bridge Smart Gate drive EVM in SPI and HW variants for automotive, brushed DC motor applications
  • Smart Gate Drive architecture with slew rate control, dead-time handshaking 0.5-mA to 62-mA peak source and sink current outputs
  • Current shunt amplifier: low side sensing; adjustable gain settings (10, 20, 40, 80 V/V); integrated feedback resistors
  • Integrated protection features: driver disable pin, VDS/VGS, supply, charge pump, thermal, and SPI only offline diagnostic monitors monitors
  • Doubler charge pump for 100% PWM and independent half-bridge, PH/EN, PWM and Split HS and LS Solenoid control PWM modes

  • Micro-USB cable

Brushed DC (BDC) motor drivers
DRV8705-Q1 Automotive, 40-V, H-bridge Smart Gate Driver w/offline diagnostics

 

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

 

Linear regulators (LDO)
TPS7B69 150-mA, 40-V, low-IQ, low-dropout voltage regulator

 

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

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Evaluation board

DRV8705H-Q1EVM – Automotive H-bridge smart gate driver EVM with low-side current sense amplifier

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Support software

DRV87XX_DRV8106-Q1EVM Software (Rev. A) – SLVC809A.ZIP (32811KB)

Evaluation board

DRV8X06-DRV8705-Q1-GUI-CLOUD – DRV8705-Q1 and DRV8x06 EVM GUI on TI Resource Explorer Cloud

Evaluation board

DRV8X06_DRV8705-Q1EVM-WEB-GUI – Web-based GUI for DRV8x06-Q1 and DRV8705-Q1 EVMs

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
Certificate DRV8705H-Q1EVM EU Declaration of Conformity (DoC) (Rev. B) Mar. 30, 2021
User guide DRV87xx-Q1EVM & DRV8106-Q1EVM GUI User's Guide (Rev. A) Oct. 30, 2019

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