DRV8434SPWPR

Overview

The DRV8434SPWPR is a bipolar stepper motor driver from Texas Instruments, designed for high-precision motion control applications. It operates within a supply voltage range of 4.5 V to 48 V and delivers a full-scale output current of 2.5 A, with an RMS capacity of 1.8 A. The device features a low RDS(ON) of 330 mΩ at 24 V and 25°C. It supports microstepping resolutions up to 1/256 step and includes integrated current sensing without external resistors. The component utilizes a 4-wire SPI interface with STEP/DIR pin support and offers configurable PWM chopper off-times of 7 μs, 16 μs, 24 μs, or 32 μs.

Feature Summary

• Integrates two N-channel power MOSFET H-bridge drivers with a microstep divider and internal current detection architecture.
• Supports smart tuning, slow decay, and mixed decay options for optimized current regulation and reduced audible noise.
• Features a full-duplex 4-wire synchronous SPI communication interface compatible with daisy-chaining up to 63 devices.
• Includes comprehensive protection mechanisms such as UVLO, OCP, OL, OTSD, and nFAULT status output.

Applications

• Printers and scanners
• ATMs and cash handling machines
• Textile machinery
• Stage lighting equipment
• Factory automation and robotics

Procurement Notes

Verify the specific suffix 'PWPR' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with system voltage limits and thermal requirements. Confirm that the required microstepping resolution and current settings align with the target motor characteristics. Validate that the SPI interface logic levels match the host controller outputs.

Selection Notes

Select this component when a compact solution with integrated current sensing is required to minimize PCB area. It is suitable for applications demanding high microstepping resolution up to 1/256 step. Consider its low standby current in sleep mode for battery-sensitive systems. Evaluate the thermal performance based on the HTSSOP-28 package and expected ambient temperatures.

Part Context

This part belongs to the DRV8434S family of stepper motor drivers. The series is characterized by its ability to drive bipolar stepper motors with high precision and efficiency. It distinguishes itself through the integration of smart tuning technology and robust fault protection features, making it suitable for industrial and consumer electronics requiring reliable motion control.

FAQ

Does the DRV8434SPWPR require external current sense resistors?

No, the DRV8434SPWPR utilizes an internal current detection architecture, eliminating the need for external power sense resistors.

What is the maximum microstepping resolution supported?

The device supports a microstep divider capable of up to 1/256 step resolution.