DRV8705-Q1

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Automotive, 40-V, H-bridge Smart Gate Driver w/offline diagnostics

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Product details

Parameters

Number of full bridges 1 Vs (Min) (V) 4.5 Sleep current (uA) 2.5 Control mode Independent 1/2-Bridge, PH/EN, PWM Control interface Hardware (GPIO), SPI Features Current Sense Amplifier, Smart Gate Drive Rating Automotive TI functional safety category Functional Safety-Capable open-in-new Find other Brushed DC (BDC) motor drivers

Package | Pins | Size

VQFN (RHB) 32 open-in-new Find other Brushed DC (BDC) motor drivers

Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • smart gate driver
    • 4.9-V to 37-V (40-V abs. max) operating range
    • Doubler charge pump for 100% PWM
    • Half-bridge and H-bridge control modes
  • 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
  • low-side current shunt amplifier
    • Adjustable gain settings (10, 20, 40, 80 V/V)
    • Integrated feedback resistors
    • Adjustable PWM blanking scheme
  • Multiple interface options available
    • SPI: Detailed configuration and diagnostics
    • H/W: Simplified control and less MCU pins
  • Spread spectrum clocking for EMI reduction
  • Compact VQFN package with wettable flanks
  • 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 (nFAULT)

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open-in-new Find other Brushed DC (BDC) motor drivers

Description

The DRV8705-Q1 is a highly integrated 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 low-side shunt amplifier allows for current sensing in order to measure motor current and provide feedback to the external controller for current limiting or stall detection.

The DRV8705-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.

open-in-new Find other Brushed DC (BDC) motor drivers
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Sample availability

RHB package is in preview. Preproduction samples are available (PDRV8705HRHBQ1 and PDRV8705SRHBQ1).  Request now

Technical documentation

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Type Title Date
* Datasheet DRV8705-Q1 Automotive H-Bridge Smart Gate Driver With Low-Side Current Sense Amplifier datasheet Jan. 10, 2019
Application note Daisy Chain Implementation for Serial Peripheral Interface (Rev. A) Apr. 07, 2021
Functional safety information DRV8705-Q1 Functional Safety, FIT Rate, Failure Mode Distribution, and Pin FMA Feb. 17, 2021
Application note Methods to Configure Current Regulation for Brushed and Stepper Motors (Rev. B) Jan. 19, 2021
Application note Understanding Smart Gate Drive (Rev. D) Nov. 06, 2020
Technical article How analog integration simplifies automotive body motor controller designs Oct. 23, 2020
Application note Detecting Short to Battery and Ground Conditions with TI Motor Gate Drivers May 29, 2020
Application note Open Load Detection in Intergrated Drivers (Rev. A) Nov. 07, 2019
White paper Smart Gate Drive Jul. 02, 2019
Application note Protecting Automotive Motor Drive Systems from Reverse Polarity Conditions (Rev. A) Feb. 19, 2019
Application note External or internal FETs for motor drive in automotive applications (Rev. A) Feb. 11, 2019
Application note Cut-Off Switch in High-Current Motor-Drive Applications (Rev. A) Aug. 20, 2018
Technical article Why are you still driving automotive motors with relays? Jul. 13, 2017
Technical article The story of motor-drive integration Jan. 09, 2017
Application note Relay Replacement for Brushed DC Motor Drive in Automotive Applications Nov. 14, 2016
Technical article How to create a dynamic power solution for stepper motors, relays and LEDs Nov. 01, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
75
Description

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 (...)

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 (...)
EVALUATION BOARD Download
document-generic User guide
Description

The DRV8705S-Q1EVM is designed to evaluate the DRV8705H-Q1, which is an integrated, automotive qualified brushed DC motor driver. The DRV8705S-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 (...)

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 simple configuration
  • Smart gate drive architecture
    • Adjustable slew rate control
    • 1.0-mA (...)

Design tools & simulation

SIMULATION MODEL Download
SLVMAR3A.ZIP (90 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
VQFN (RHB) 32 View options

Ordering & quality

Information included:
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  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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Support & training

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