DRV8235RTER

Overview

The DRV8235RTER is a Texas Instruments integrated half-bridge brushed DC motor driver featuring built-in speed regulation, stall detection, and current sensing. It operates on a supply voltage range of 4.5 V to 38 V with a peak output current capability of 3.7 A and an RMS rating of 2 A. The device utilizes an I²C interface for register configuration and diagnostics, supporting standard and fast modes with 3.3 V or 5 V logic inputs. Key electrical characteristics include a 600 mΩ total RDS(on) for the high-side and low-side switches, a maximum sleep current of less than 1 μA, and an internal charge pump enabling 100% duty cycle operation.

Feature Summary

• Integrated speed regulation using motor voltage and current data eliminates the need for external sensors.
• I²C control interface allows for digital register configuration and real-time diagnostic monitoring.
• Internal current mirror enables analog current detection without requiring large external shunt resistors.
• Soft-start and soft-stop functions manage turn-on and turn-off times to limit inrush currents.

Applications

• Battery-powered appliances requiring constant speed under varying load conditions
• Systems utilizing unregulated power supplies where input voltage fluctuates
• Applications demanding reduced board space through sensorless speed control
• Portable devices prioritizing extended battery life via low-power sleep modes

Procurement Notes

Verify the specific package marking and tape-and-reel specifications against the official datasheet before ordering. Confirm that the I²C address settings align with your system's bus topology. Ensure the host microcontroller supports the required logic voltage levels for reliable communication. Check for any recent revisions to the component documentation that may affect pinout or electrical parameters.

Selection Notes

Select this component when design constraints require integrated speed regulation without external feedback sensors. It is suitable for applications needing precise current limiting and stall detection capabilities managed via digital interfaces. Consider the thermal performance of the WQFN package relative to the expected RMS current loads. Evaluate the I²C bus speed requirements against the controller's processing capabilities.

Part Context

This part belongs to the DRV8235 family of integrated motor drivers designed for compact, cost-sensitive brushed DC motor applications. It consolidates power switching, gate driving, and control logic into a single small-footprint package. The series emphasizes ease of integration by removing the need for discrete current sensing and speed regulation components typically found in traditional half-bridge designs.

Replacement Considerations

Consult the manufacturer's cross-reference guide for verified alternative part numbers. Ensure any substitute maintains compatibility with the 4.5 V to 38 V operating range and I²C interface requirements. Verify that thermal dissipation characteristics match the original design constraints.

FAQ

How does the device regulate motor speed without external sensors?

It uses internal circuitry to monitor motor voltage and current data to adjust the drive signal, maintaining constant speed despite input voltage variations.

What is the maximum current consumption in sleep mode?

The device features a low-power sleep mode with a maximum sleep current of less than 1 μA to extend battery life.

Can the device operate at 100% duty cycle?

Yes, it includes an internal charge pump that allows for 100% duty cycle operation.