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-Dokumentation | Typ | Titel | Format-Optionen | Neueste englische Version herunterladen | Datum |
|---|---|---|---|---|---|
| * | Datenblatt | DRV8871 3.6-A Brushed DC Motor Driver With Internal Current Sense (PWM Control) datasheet (Rev. B) | PDF | HTML | 05.07.2016 | |
| Anwendungshinweis | Understanding Motor Driver Current Ratings (Rev. A) | PDF | HTML | 05.07.2024 | ||
| Application brief | Advantages of Integrated Current Sensing (Rev. B) | PDF | HTML | 20.06.2022 | ||
| Anwendungshinweis | Best Practices for Board Layout of Motor Drivers (Rev. B) | PDF | HTML | 14.10.2021 | ||
| Anwendungshinweis | Calculating Power Dissipation for a H-Bridge or Half Bridge Driver (Rev. A) | PDF | HTML | 22.07.2021 | ||
| Technischer Artikel | Overcoming design challenges for brushed-DC motors in smart sanitation systems | PDF | HTML | 01.07.2020 | ||
| Anwendungshinweis | PowerPAD™ Thermally Enhanced Package (Rev. H) | 06.07.2018 | |||
| Technischer Artikel | Evolution of the brushed DC driver | PDF | HTML | 26.10.2015 | ||
| Application brief | PowerPAD™ Made Easy (Rev. B) | 12.05.2004 |
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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.
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 (...)
| Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
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