DRV8461PWPR

Overview

The DRV8461PWPR is a high-performance bipolar stepper motor driver from Texas Instruments, housed in a 28-pin HTSSOP (PWP) package. It supports a wide supply voltage range of 4.5 V to 65 V and delivers up to 3 A full-scale current with an integrated RDS(ON) of 300 mΩ. The device features an internal indexer supporting up to 1/256 microstepping, automatic torque control, and silent step decay modes. It includes built-in current sensing, eliminating external shunt resistors, and offers comprehensive protection against overcurrent, thermal shutdown, and undervoltage lockout.

Feature Summary

• Integrated indexer supporting up to 1/256 microstepping with automatic interpolation
• Silent step mode for noise-free operation at low speeds and standstill
• Automatic torque control adjusts coil current based on load requirements
• Internal current detection eliminates the need for external sense resistors

Applications

• Factory automation and robotic systems
• Medical imaging and diagnostic equipment
• Textile machines and sewing applications
• ATM machines and currency counters
• Outdoor IP cameras and PLCs

Procurement Notes

Verify the specific suffix 'PWPR' corresponds to the HTSSOP-28 package and tape-and-reel packaging configuration. Confirm that the logic voltage inputs align with your controller's 1.8V, 3.3V, or 5.0V levels. Ensure the system power rail falls within the 4.5V to 65V operating range. Check for moisture sensitivity handling requirements during assembly. Validate thermal management needs given the 3A current capacity and package dissipation limits.

Selection Notes

Select this component when a compact solution is required for high-density PCB designs without external current sensing resistors. It is suitable for applications demanding quiet operation at low speeds via silent step technology. Choose this driver if the application requires support for standard 24V, 36V, or 48V power rails. Consider it for systems needing integrated protection features like stall detection and fault output signaling.

Part Context

The DRV8461 belongs to Texas Instruments' advanced stepper motor driver family, designed to replace discrete MOSFET solutions. It offers pin-to-pin compatibility with other devices in the series, such as the DRV8434 and DRV8452 in the PWP package. This integration allows for simplified design transitions while providing higher power density and reduced board space compared to external FET drivers.

Replacement Considerations

The DRV8461PWPR is pin-compatible with the DRV8434PWPR and DRV8452PWPR within the same PWP package family.