A3982SLB-T

Overview

The A3982SLB-T is a complete bipolar stepper motor driver with an integrated translator, manufactured by Allegro MicroSystems. It operates in full-step and half-step modes with output drive capabilities up to 35 V and ±2 A. The device features a fixed off-time current regulator supporting Slow or Mixed decay modes, low RDS(on) outputs, and synchronous rectification for reduced power dissipation. Internal protections include UVLO, thermal shutdown, and crossover-current protection. It utilizes DMOS technology and is housed in a 24-SOIC package.

Feature Summary

• Integrated translator enables easy operation of bipolar stepper motors without external logic.
• Fixed off-time current regulator supports selectable Slow or Mixed decay modes.
• Synchronous rectification minimizes power dissipation during operation.

Applications

• Bipolar stepper motor control systems
• General motion control applications
• Industrial automation equipment

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging versus tube variants. Confirm RoHS compliance status as some listings indicate non-compliance. Check humidity sensitivity levels and storage conditions prior to assembly. Ensure the SOIC-Wide-24 footprint matches the target PCB design. Validate supply chain authenticity through authorized distributors.

Selection Notes

Select this component for applications requiring integrated translation and simple interface control. Consider the ±2 A output current limit and 35 V voltage rating for load compatibility. Evaluate thermal management requirements due to DMOS technology characteristics. Compare against alternatives if mixed decay mode flexibility is critical. Verify package availability constraints for production volumes.

Part Context

The A3982 belongs to Allegro's family of DMOS stepper motor drivers designed for robust performance. It integrates both control logic and power stages into a single solution. The SLB variant specifically denotes the SOIC-Wide-24 package configuration. This series targets cost-sensitive applications requiring reliable stepper motor driving capabilities.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other Allegro microstepping drivers if pinout compatibility is required. Verify electrical parameters match before substituting with generic equivalents.