DRV8461SPWPR

Overview

The DRV8461SPWPR is a high-performance bipolar stepper motor driver from Texas Instruments, housed in a 28-pin HTSSOP (PWP) package. It supports a supply voltage range of 4.5 V to 65 V and delivers up to 3 A full-scale current with an RMS capacity of 2.1 A. The device features integrated MOSFETs with a low on-resistance of 300 mΩ at 24 V and 25°C. It includes a built-in microstepping indexer supporting resolutions up to 1/256, automatic torque control, and a quiet step decay mode for noiseless operation. Operating temperatures range from -40°C to +125°C.

Feature Summary

• Integrated microstepping indexer supporting up to 1/256 resolution with automatic interpolation
• Automatic torque control adjusts coil current based on load to improve efficiency
• Quiet step decay mode enables noiseless operation during low-speed and stationary states
• Internal current sensing eliminates the need for external sense resistors

Applications

• Factory automation and robotic systems
• Medical imaging and diagnostic equipment
• Textile machines and sewing equipment
• Outdoor IP cameras
• 3D printers and multi-function printers

Procurement Notes

Verify the specific suffix SPWPR corresponds to the 28-pin HTSSOP package when ordering. Confirm that the application requires the 65V maximum voltage rating and 3A current capability. Ensure thermal management solutions are adequate for the expected power dissipation within the operating temperature range. Check for moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Select this component for applications requiring high power density and precise motion control without external sense resistors. It is suitable for systems utilizing standard 24V, 36V, or 48V power rails. Consider the PWP package for space-constrained designs compared to larger footprints. Evaluate the need for silent running capabilities if acoustic noise is a critical constraint in the target environment.

Part Context

This part belongs to the DRV8461 family of stepper motor drivers designed for high-efficiency performance. It offers pin-to-pin compatibility with other devices in the series, such as the DRV8434 and DRV8452 in similar packages, facilitating design upgrades. The family emphasizes reduced PCB area and system cost through integrated features like internal current regulation and advanced protection mechanisms.

Replacement Considerations

The DRV8462DDWR is a pin-compatible alternative offering higher current capacity up to 5A. For lower voltage applications, the DRV8434 or DRV8452 may serve as compatible substitutes depending on specific current and voltage requirements.