A3958SLB-T

Overview

The A3958SLB-T is a fully integrated brushed DC motor driver manufactured by Allegro Microsystems. It features a DMOS technology with two half-bridge outputs capable of delivering up to 2A continuous output current. The device supports a supply voltage range of 4.5V to 5.5V and handles load voltages between 20V and 50V. It utilizes a serial interface for control and configuration, including programmable current decay modes. The component is housed in a 24-SOIC surface-mount package and operates within a junction temperature range of -20°C to 150°C.

Feature Summary

• Integrates full control logic and power stage for simplified design
• Supports programmable mixed, fast, and slow current decay via serial interface
• Includes internal charge pump and voltage regulator for high-side drive stability
• Features thermal shutdown and cross-current protection mechanisms

Applications

• General purpose brushed DC motor control
• Industrial automation actuators
• Office equipment motor drives

Procurement Notes

Verify the specific suffix against official manufacturer documentation, as variations may indicate different packaging or RoHS compliance status. Confirm availability status, as this part number has been marked as discontinued in several distributor records. Ensure the selected variant matches the required lead time and manufacturing constraints for the intended production cycle.

Selection Notes

Select this component for applications requiring a compact solution for low-to-medium power brushed DC motors. The serial interface reduces pin count compared to parallel alternatives. Consider the 24-SOIC package for thermal management needs. Verify that the system voltage aligns with the 4.5V to 5.5V supply requirement and that the load voltage does not exceed the 50V limit.

Part Context

This device belongs to the A3958 series of motor drivers from Allegro MicroSystems. It is designed for general-purpose applications where space and integration are priorities. The series typically offers robust protection features and flexible current control options suitable for various consumer and industrial motor control tasks.

Replacement Considerations

Publicly confirmed substitute part numbers include A3959SLBTR-T and L6229DTR.