DRV8231DSGR

Overview

The DRV8231DSGR is an integrated N-channel H-bridge brushed DC motor driver manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 33 V and delivers a peak output current capability of 3.7 A. The device incorporates a charge pump to support N-channel MOSFET half-bridges and enable 100% duty-cycle driving for improved efficiency. Key electrical parameters include a maximum on-resistance of 600 mΩ, logic input compatibility with 1.8 V, 3.3 V, and 5 V signals, and a low-power sleep mode consuming less than 1 µA at 24 V. It is housed in an 8-pin WSON package with a PowerPAD thermal pad.

Feature Summary

• Integrates an N-channel H-bridge with a charge pump for high-efficiency 100% duty-cycle operation
• Features integrated current regulation via external shunt resistor or internal current mirror options
• Includes comprehensive protection mechanisms such as UVLO, auto-retry overcurrent protection, and thermal shutdown
• Supports PWM control interfaces with logic inputs compatible with standard 1.8 V, 3.3 V, and 5 V levels

Applications

• Automated teller machines (ATMs)
• Surgical equipment and ventilators
• Electronic hospital beds and bed controls
• Vacuum robots and fitness machines

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pin-to-pin compatibility and functional variants. Ensure the selected variant matches the required current sensing method, whether using an external shunt resistor or an integrated current mirror. Confirm package integrity and RoHS compliance status prior to integration into final designs.

Selection Notes

Select the DRV8231DSGR when designing systems requiring a compact, high-efficiency solution for brushed DC motors operating up to 33 V. Choose this component for applications demanding precise current regulation and stall detection capabilities. Consider the integrated thermal management features and small footprint when space-constrained PCB layouts are necessary for medical or industrial automation devices.

Part Context

This component belongs to the DRV8231 family of integrated motor drivers designed for scalable power solutions. The series offers pin-to-pin compatibility across various R_DS(on) and voltage ratings, allowing designers to adapt designs with minimal changes. It complements other TI motor drivers like the DRV8870 and DRV8251 by providing a balanced option for mid-range voltage and current requirements in automated systems.

Replacement Considerations

Official pin-to-pin alternatives within the same family include the DRV8231A, which utilizes an integrated current mirror instead of an external shunt resistor. Designers should verify that the substitute part meets the specific current sensing architecture requirements of the existing circuit design.