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.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | DRV8871 3.6-A Brushed DC Motor Driver With Internal Current Sense (PWM Control) datasheet (Rev. B) | PDF | HTML | 05 Jul 2016 |
| Application note | Understanding Motor Driver Current Ratings (Rev. A) | PDF | HTML | 05 Jul 2024 | |
| Application brief | Advantages of Integrated Current Sensing (Rev. B) | PDF | HTML | 20 Jun 2022 | |
| Application note | Best Practices for Board Layout of Motor Drivers (Rev. B) | PDF | HTML | 14 Oct 2021 | |
| Application note | Calculating Power Dissipation for a H-Bridge or Half Bridge Driver (Rev. A) | PDF | HTML | 22 Jul 2021 | |
| Technical article | Overcoming design challenges for brushed-DC motors in smart sanitation systems | PDF | HTML | 01 Jul 2020 | |
| Application note | PowerPAD™ Thermally Enhanced Package (Rev. H) | 06 Jul 2018 | ||
| Technical article | Evolution of the brushed DC driver | PDF | HTML | 26 Oct 2015 | |
| Application brief | PowerPAD™ Made Easy (Rev. B) | 12 May 2004 |
For additional terms or required resources, click any title below to view the detail page where available.
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.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
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