A3982SLBTR

Overview

The A3982SLBTR-T is a complete stepper motor driver manufactured by Allegro MicroSystems, housed in a 24-pin Wide SOIC package. It supports bipolar stepper motors with output drive performance up to 35 V and ±2 A. The device features an internal converter for simplified operation, requiring only step and direction inputs. It includes a fixed off-time current regulator capable of operating in slow or mixed decay modes. Internal protections include under-voltage lockout (UVLO), thermal shutdown, and cross-current protection.

Feature Summary

• Integrated converter simplifies implementation by eliminating the need for complex phase sequencing or high-frequency control lines.
• Automatic selection of current decay mode between slow and mixed settings to reduce audible noise and improve stepping accuracy.
• Internal synchronous rectification control circuit improves power consumption during PWM operation.
• Built-in protection mechanisms include over-temperature shutdown, under-voltage lockout, and cross-current protection.

Applications

• Applications where microprocessors are unavailable or overloaded
• General purpose bipolar stepper motor control systems
• Devices requiring reduced audible motor noise

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and tape/reel specifications. Confirm RoHS compliance status as it varies by manufacturing batch and region. Check for obsolescence notices from Allegro MicroSystems before finalizing procurement plans.

Selection Notes

Select this component for designs requiring a fully integrated driver with minimal external components. Ensure the load voltage does not exceed 35 V and the peak current remains within the ±2 A rating. Verify that the 24-pin Wide SOIC footprint fits the PCB layout constraints.

Part Context

This part belongs to the A3982 series of DMOS stepper motor drivers. It is designed for ease of use in applications lacking complex processing capabilities. The series emphasizes low RDS(on) outputs and efficient power management through synchronous rectification.

Replacement Considerations

Toshiba TB6560AHQ is listed as a similar replacement option. Verify pin compatibility and electrical ratings before substitution.