A3958SB

$2.69

Description：IC MOTOR DRIVER 4.5V-5.5V 24DIP
Series：-
Mfr：Allegro MicroSystems
Package：Tube

SKU:daf25bfe3518 Category: Motor Drivers, Controllers Brand: Allegro MicroSystems

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Product introduction

Product Detailed Parameters

Description：IC MOTOR DRIVER 4.5V-5.5V 24DIP
Series：-
Mfr：Allegro MicroSystems
Package：Tube
Motor Type - Stepper：-
Motor Type - AC, DC：Brushed DC
Function：Driver - Fully Integrated, Control and Power Stage
Output Configuration：Half Bridge (2)
Interface：Serial
Technology：DMOS
Step Resolution：-
Applications：General Purpose
Current - Output：2A
Voltage - Supply：4.5V ~ 5.5V
Voltage - Load：20V ~ 50V
Operating Temperature：-20°C ~ 150°C (TJ)
Mounting Type：Through Hole
Package / Case：24-PowerDIP (0.300", 7.62mm)
Supplier Device Package：24-DIP
Grade：-
Qualification：-

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A3958SB

Overview

The A3958SB is a discontinued DMOS full-bridge PWM motor driver manufactured by Allegro MicroSystems. It supports continuous output currents of ±2A and operates with supply voltages between 4.5V and 5.5V, while handling load voltages up to 50V. The device utilizes a serial interface for control and features integrated current regulation with selectable decay modes. It is housed in a 24-pin DIP package designed for through-hole mounting.

Feature Summary

Integrates full bridge driver, control logic, and power stage for brushless DC motors
Features internal fixed off-time PWM current control circuitry
Includes synchronous rectification mechanism to optimize power efficiency
Provides protection against under-voltage lockout and thermal shutdown

Applications

Brushless DC motor control systems
General purpose motor drive applications
Industrial automation equipment requiring precise speed control

Procurement Notes

Verify component authenticity as the A3958SB is officially discontinued. Confirm package integrity and pin compatibility during integration. Check for RoHS compliance variations across manufacturing lots. Ensure replacement strategies are documented due to end-of-life status. Validate electrical parameters against original design specifications before deployment.

Selection Notes

Select this component only if legacy system compatibility requires the specific 24-pin DIP form factor. Evaluate alternative packages such as SOIC or TSSOP for modern designs. Consider updated series from the manufacturer for improved performance metrics. Assess long-term availability risks associated with discontinued semiconductor products.

Part Context

This part belongs to the A3958 family of high-performance motor drivers. It shares functional similarities with other Allegro microstepping and brushed DC motor controllers. The device represents an earlier generation of integrated motor solutions compared to newer low-power alternatives.