DRV8461DDWR

Overview

The DRV8461DDWR is a high-performance stepper motor driver from Texas Instruments, housed in a 44-pin HTSSOP (DDW) 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 integrates MOSFETs with a low RDS(ON) of 300 mΩ at 24 V and 25°C. Key features include a built-in microstep indexer supporting resolutions up to 1/256, automatic torque control, and silent step decay modes for noise reduction. It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a programmable microstep indexer supporting resolutions up to 1/256 with automatic interpolation to reduce controller overhead.
• Features automatic torque control that adjusts coil current based on load torque to improve efficiency during operation.
• Includes silent step decay mode to ensure quiet operation during low-speed movement and stationary holding states.
• Provides internal current sensing and regulation, eliminating the need for external sense resistors to save PCB area.

Applications

• Factory automation systems and robotic actuators
• Medical imaging equipment and diagnostic devices
• Textile machinery and sewing machines
• Automated teller machines (ATMs) and currency counters

Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm RoHS compliance status through official documentation. Check for recent Product Change Notifications (PCNs) regarding manufacturing site or material updates. Ensure compatibility with system logic voltage levels before integration.

Selection Notes

Select this component for applications requiring high power density and precise motion control without external sense resistors. It is suitable for systems operating on standard 24 V, 36 V, or 48 V rails. Consider pin-compatible alternatives like the DRV8452DDWR if lower voltage ratings are sufficient for the specific application requirements.

Part Context

This part belongs to the DRV846x family of stepper motor drivers designed for high-efficiency and low-noise performance. It shares pinout compatibility with other devices in the series, such as the DRV8452, facilitating design upgrades. The DDW package allows for compact implementation in space-constrained industrial and commercial electronic systems.

Replacement Considerations

The DRV8452DDWR is a pin-compatible alternative offering 55 V support and 5 A full-scale current. Designers should verify voltage and current headroom requirements when substituting between these models to ensure system reliability.