DRV8426EPWPR

Overview

The DRV8426EPWPR is a dual H-bridge motor driver from Texas Instruments, designed for bipolar stepper or dual brushed DC motors. It features an integrated current sense amplifier and Smart Tune technology for automatic optimization of chopper parameters. The device supports a STEP/DIR interface and offers up to 1/256 microstepping resolution. Operating with a supply voltage range of 4.5 V to 48 V, it delivers a continuous output current of 1.5 A per bridge. The component is housed in a 28-pin HTSSOP package and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Integrated current sense amplifier eliminates external shunt resistors
• Smart Tune technology automatically optimizes chopper settings
• Supports high-resolution 1/256 microstepping modes
• Compatible with standard STEP/DIR control interfaces

Applications

• Bipolar stepper motor control systems
• Dual brushed DC motor drives
• Industrial automation equipment
• Medical devices requiring precise motion control

Procurement Notes

Verify the specific suffix EPWPR against the manufacturer datasheet to confirm pinout and thermal characteristics. Ensure the ordering part number matches the required tape-and-reel packaging configuration. Cross-reference the RoHS compliance status with the latest environmental documentation provided by Texas Instruments before finalizing procurement.

Selection Notes

Select this component when designing systems requiring integrated current sensing without external shunts. It is suitable for applications needing high microstepping resolution for smooth motion. Consider the 48 V maximum supply voltage and 1.5 A current capability relative to the motor load requirements. Evaluate the HTSSOP-28 package thermal performance for the intended operating environment.

Part Context

This part belongs to the DRV8426E/P family of dual H-bridge drivers. It shares core functionalities with variants like DRV8426ERGER but differs in packaging and reel specifications. The series is characterized by its Smart Tune feature and integrated signal conditioning, distinguishing it from basic half-bridge drivers that lack advanced chopper optimization capabilities.

Replacement Considerations

Direct substitutes include other DRV8426 variants such as DRV8426ERGER, which share identical electrical functionality but may differ in packaging format. Verify pin compatibility and thermal dissipation requirements when swapping between different package types within the same functional family.