DRV8871

ACTIVE

45-V, 3.6-A H-bridge motor driver with integrated current sensing

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Product details

Parameters

Number of full bridges 1 Vs (Min) (V) 6.5 Vs (Max) (V) 45 Peak output current (A) 3.7 RDS(ON) (HS + LS) (mOhms) 565 Control mode PWM Control interface Hardware (GPIO) Features Current Regulation, Integrated Current Sensing Approx. price (US$) 0.85 | 1ku Rating Catalog open-in-new Find other Brushed DC (BDC) motor drivers

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 open-in-new Find other Brushed DC (BDC) motor drivers

Features

  • H-Bridge Motor Driver
    • Drives One DC Motor, One Winding of a Stepper Motor, or Other Loads
  • Wide 6.5-V to 45-V Operating Voltage
  • 565-mΩ Typical RDS(on) (HS + LS)
  • 3.6-A Peak Current Drive
  • PWM Control Interface
  • Current Regulation Without a Sense Resistor
  • Low-Power Sleep Mode
  • Small Package and Footprint
    • 8-Pin HSOP With PowerPAD™
    • 4.9 × 6 mm
  • Integrated Protection Features
    • VM Undervoltage Lockout (UVLO)
    • Overcurrent Protection (OCP)
    • Thermal Shutdown (TSD)
    • Automatic Fault Recovery

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Description

The DRV8871 device is a brushed-DC motor driver for printers, appliances, industrial equipment, and other small machines. Two logic inputs control the H-bridge driver, which consists of four N-channel MOSFETs that can control motors bidirectionally with up to 3.6-A peak current. The inputs can be pulse-width modulated (PWM) to control motor speed, using a choice of current-decay modes. Setting both inputs low enters a low-power sleep mode.

The DRV8871 device has advanced current-regulation circuitry that does not use an analog voltage reference or external sense resistor. This novel solution uses a standard low-cost, low-power resistor to set the current threshold. The ability to limit current to a known level can significantly reduce the system power requirements and bulk capacitance needed to maintain stable voltage, especially for motor startup and stall conditions.

The device is fully protected from faults and short circuits, including undervoltage (UVLO), overcurrent (OCP), and overtemperature (TSD). When the fault condition is removed, the device automatically resumes normal operation.

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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
DRV8876 ACTIVE 37-V, 3.5-A H-bridge motor driver with integrated current sensing & current sense feedback Reduces BOM cost, board space and power consumption with integrated current sensing.

Technical documentation

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Type Title Date
* Datasheet DRV8871 3.6-A Brushed DC Motor Driver With Internal Current Sense (PWM Control) datasheet (Rev. B) Jul. 05, 2016
Technical articles Anything but discrete: How to simplify 48-V to 60-V DC-fed three-phase inverter design Feb. 01, 2019
Application notes Best Practices for Board Layout of Motor Drivers (Rev. A) Jan. 22, 2019
Application notes Advantages of Integrated Current Sensing Jan. 07, 2019
Application notes PowerPAD™ Thermally Enhanced Package (Rev. H) Jul. 06, 2018
Technical articles Integrated intelligence part 3: motor startup from standstill position Dec. 11, 2017
Technical articles Integrated intelligence part 2: motor startup open loop acceleration Dec. 04, 2017
Technical articles Six weird ways to design with a brushless-DC driver Aug. 28, 2017
User guides DRV8871 Evaluation Module User's Guide Aug. 21, 2015
Application notes Calculating Motor Driver Power Dissipation Feb. 06, 2012
Application notes Understanding Motor Driver Current Ratings Feb. 06, 2012
Application notes DRV88xx Current Recirculation and Decay Modes Application Report Mar. 02, 2009
Application notes PowerPAD™ Made Easy (Rev. B) May 12, 2004

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

The DRV8871 evaluation module demonstrates the capabilities and performance of the DRV8871 integrated circuit from Texas Instruments. The EVM includes a 5V regulator and PWM generator. A single power source is required to evaluate the DRV8871.

Features
  • 6.5V to 45V Operating Supply Voltage Range
  • On Board 5V Regulator
  • Adjustable PWM DUty Cycle
  • Adjustable Current Regulation

Reference designs

REFERENCE DESIGNS Download
Ultra Small Brushed DC Motor Current Regulation TI Reference Design
TIDA-00786 TIDA-00786 is a small footprint brushed DC motor controller that has a fixed 100% duty-cycle speed input and variable current regulation.  The DRV8871’s integrated current sensing feature allows the design to utilize a standard potentiometer allowing the user to vary the current limiting (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

Support & training

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Videos

How to use integrated current sensing in brushed DC motors

Learn what current sensing is used for in brushed DC motors, how to implement a motor driver with integrated current sensing and how it works.

Posted: 05-Jan-2016
Duration: 03:29

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