TIDRV8434SRGER

Overview

The DRV8434SRGER is a highly integrated bipolar stepper motor driver from Texas Instruments capable of delivering up to 2.5A output current across a wide supply range of 4.5V to 48V. It features an integrated indexer supporting up to 1/256 microstepping and internal current sensing, which eliminates the need for external sense resistors to save board space and cost. The device includes an SPI interface for advanced configuration, diagnostics, and daisy-chaining multiple drivers.

Why Choose This Part

The integrated current sensing and smart tune decay technology significantly simplify the PCB layout by removing bulky power resistors and manual tuning steps. It offers robust protection features including overcurrent, undervoltage, and sensorless stall detection to improve system reliability. The combination of a small 4x4mm VQFN package and wide voltage support up to 48V provides high power density for space-constrained designs.

Applications

Getting Started

To evaluate this driver, use the DRV8434SEVM evaluation module which provides a graphical interface for tuning SPI registers and controlling motor motion. Engineers should ensure the VQFN thermal pad is properly soldered to a large ground plane to manage heat dissipation during 2.5A operation. Initial firmware development can leverage the Step/Direction pins for motion while using SPI for diagnostic monitoring and current scaling via the TRQ_DAC.

DRV8434 Family

Comparing specs that differ across variants. The current part is highlighted.

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