DRV8871DDAR

Overview

The DRV8871DDAR is a brushed DC motor driver featuring an integrated H-bridge with four N-channel MOSFETs. It supports a supply voltage range of 6.5 V to 45 V and delivers a peak output current of 3.6 A. The device operates within a temperature range of -40 °C to +125 °C and utilizes an SO-PowerPad-8 surface-mount package. It incorporates advanced current regulation using external resistors, eliminating the need for analog voltage references or sense resistors. Logic inputs control bidirectional motor operation via PWM, while automatic recovery features handle fault conditions.

Feature Summary

• Integrated current sensing eliminates the requirement for external sense resistors or analog voltage references.
• Advanced current regulation circuitry limits peak current to reduce system power requirements.
• Automatic recovery from overcurrent, thermal, and undervoltage lockout faults ensures continuous operation.
• Low quiescent current enables efficient entry into low-power sleep mode when logic inputs are low.

Applications

• Printers
• Appliances
• Industrial equipment
• Small machinery

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pin compatibility and functional equivalence. Ensure the ordering part number matches the required package variant and quality grade. Cross-reference the manufacturer's latest datasheet revision to validate electrical characteristics and thermal performance specifications before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring a single-channel brushed DC motor solution with integrated protection. The absence of external sense resistors simplifies bill of materials and reduces board space. Verify that the load current remains within the 3.6 A peak limit and that the supply voltage stays within the specified operational range for reliable performance.

Part Context

This device belongs to the DRV887x family of motor drivers designed for compact, cost-sensitive applications. It integrates high-side and low-side drivers with a charge pump to drive N-channel MOSFETs efficiently. The PowerPAD thermal pad facilitates heat dissipation in small form factors, making it suitable for dense electronic assemblies in consumer and industrial sectors.

Replacement Considerations

The DRV8871DDARG4 is a verified replacement variant within the same product line. Confirm mechanical footprint and electrical parameter alignment with the original specification sheet before substitution.

FAQ

How does the DRV8871DDAR regulate current without sense resistors?

It uses an internal advanced current regulation circuit that sets the threshold using standard external resistors, removing the need for analog voltage references or dedicated sense resistors.

What happens if the device detects an overcurrent or thermal fault?

The device automatically recovers and resumes normal operation once the fault condition is cleared, ensuring uninterrupted system functionality.