A3958SLBTR

Overview

The A3958SLBTR is a fully integrated brushed DC motor driver manufactured by Allegro MicroSystems. It operates within a supply voltage range of 4.5V to 5.5V and supports load voltages up to 50V. The device delivers a continuous output current of 2A using DMOS technology. It features a 24-SOIC surface-mount package with a junction temperature rating of -20°C to 150°C. Control is managed via a three-wire serial interface, enabling programmable current decay modes and PWM synchronization.

Feature Summary

• Fully integrated control and power stage for brushed DC motors
• Serial interface for programmable current decay and PWM settings
• Internal charge pump and voltage regulator for high-side drive stability
• Built-in thermal shutdown and under-voltage lockout protection

Applications

• General purpose motor control systems
• Industrial automation actuators
• Office equipment drives

Procurement Notes

Verify the specific suffix and tape-and-reel quantity against the manufacturer's latest datasheet, as packaging configurations may vary. Confirm RoHS compliance status directly with the supplier, as historical records indicate potential non-compliance for certain variants. Ensure the source document explicitly identifies the component as active or discontinued before finalizing procurement plans.

Selection Notes

Select this component when a low-voltage logic interface (4.5V-5.5V) is required to drive higher voltage loads up to 50V. The serial interface reduces pin count compared to parallel control schemes. Verify that the 2A continuous current rating meets the application's thermal requirements without excessive heatsinking. Consider the 24-SOIC footprint for PCB layout constraints.

Part Context

This part belongs to the A3958 series of DMOS motor drivers designed for precise current control in brushed DC applications. It integrates fixed off-time PWM current regulation, allowing for efficient operation across various duty cycles. The series is characterized by its ability to handle significant voltage differentials between the logic supply and the motor load.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.