DRV8426ERGER

Overview

The DRV8426ERGER is a dual H-bridge motor driver from Texas Instruments, designed for bipolar stepper motors and dual bidirectional brushed DC motors. It features an integrated current sense architecture eliminating external resistors, with ±5% full-scale accuracy. The device operates on a supply voltage range of 4.5 V to 33 V. Key electrical parameters include a peak output current of 2.5 A per bridge for brushed applications and 1.5 A full-scale for steppers. The high-side and low-side Rds(on) is 900 mΩ at 24 V and 25°C. It supports STEP/DIR and PWM interfaces, offering Smart Tune decay control and configurable PWM chopping times.

Feature Summary

• Integrated current sensing functionality that removes the need for external sense resistors while maintaining high accuracy
• Smart Tune technology providing fast and mixed decay options for optimized motor performance
• Configurable off-time PWM chopping with selectable durations for precise current regulation

Applications

• Bipolar stepper motor control systems
• Dual bidirectional brushed DC motor drives
• Four unidirectional brushed DC motor configurations

Procurement Notes

Verify the specific package suffix and tape/reel specifications against the manufacturer's latest datasheet before ordering. Confirm that the operating voltage and current requirements align with the 33 V maximum and 1.5 A continuous limits. Ensure thermal management strategies account for the 900 mΩ Rds(on) characteristics under expected load conditions.

Selection Notes

Select this component when designing systems requiring integrated current sensing to reduce bill of materials complexity. It is suitable for applications needing flexible control interfaces including STEP/DIR and PWM. Consider the 4.5 V to 33 V input range compatibility with standard logic levels and power supplies.

Part Context

This part belongs to the DRV8426 family of dual H-bridge drivers. It shares pin-to-pin compatibility with related models such as the DRV8424E/P, DRV8436E/P, and DRV8434E/P, which offer variations in voltage ratings and on-resistance values within the same series.

Replacement Considerations

Pin-to-pin compatible alternatives include the DRV8424E/P for lower resistance applications, the DRV8436E/P for higher voltage support up to 48 V, and the DRV8434E/P for combined high voltage and low resistance requirements.