DRV8426PWPR

Overview

The DRV8426PWPR is a dual H-bridge motor driver manufactured by Texas Instruments, designed for bipolar stepper and brushed DC motors. It features an integrated current sense amplifier with a programmable gain of 10 V/V, enabling precise overcurrent protection without external shunt resistors. The device supports STEP/DIR interface control and includes Smart Tune technology to optimize motor performance. It operates within a supply voltage range of 5.5 V to 36 V and delivers up to 2 A output current per bridge. The component is housed in a 16-pin PowerTSSOP package with an exposed thermal pad.

Feature Summary

• Integrated current sense amplifier with programmable gain for direct overcurrent protection
• Smart Tune technology for automatic optimization of motor torque and resonance
• Supports microstepping resolutions from full step to 1/256 via STEP/DIR interface

Applications

• Bipolar stepper motor control systems
• Brushed DC motor drives
• Industrial automation actuators
• Medical equipment motion control

Procurement Notes

Verify the exact suffix PRGER or PWPR against the specific datasheet revision to confirm package type and tape/reel specifications. Ensure that the ordering part number matches the required temperature grade and packaging format. Cross-reference the manufacturer's official documentation for any recent design changes or lifecycle status updates before finalizing procurement orders.

Selection Notes

Select this component when a dual H-bridge configuration with integrated sensing is required for stepper or DC motor applications. It is suitable for designs needing high-resolution microstepping and automated tuning capabilities. Consider the thermal performance of the PowerTSSOP package and the operating voltage range relative to the motor supply requirements.

Part Context

The DRV8426 belongs to Texas Instruments' family of advanced motor drivers featuring Smart Tune technology. It integrates control logic, power stages, and protection circuits into a single solution. This series simplifies motor drive design by reducing external component count while providing robust protection features such as overcurrent, overtemperature, and undervoltage lockout.

Replacement Considerations

Direct substitutes include other DRV842x variants with compatible pinouts and electrical characteristics. Verify compatibility regarding package dimensions, thermal resistance, and control interface signals. Alternative drivers may require external current sense components if integrated sensing is not present.