A3988SEVTR-1-T

Overview

The A3988SEVTR-1-T is a complete bipolar stepper motor driver manufactured by Allegro MicroSystems. It integrates a translator, current control, and power DMOS outputs in a single package. The device supports full, half, and quarter-step modes for smooth motion control. It operates with a logic supply voltage of 3 V to 5.5 V and a motor supply voltage range of 8 V to 36 V. The output drivers provide up to 1.2 A per phase. Key features include automatic current decay mode detection, synchronous rectification, and internal protection circuits such as thermal shutdown and overcurrent protection.

Feature Summary

• Integrates a translator for simple parallel interface operation without requiring a microcontroller.
• Features automatic current decay mode detection and selection for optimized torque and noise performance.
• Includes synchronous rectification to reduce power dissipation during low-current operation.
• Provides comprehensive protection against thermal overload, short circuits to ground, and crossover currents.

Applications

• Bipolar stepper motor control in office automation equipment
• Motion control systems in industrial machinery
• Valve actuation in automotive applications

Procurement Notes

Verify the specific suffix '1-T' against the official datasheet to confirm packaging and tape specifications. Confirm component status as this series may be designated for limited availability or not recommended for new designs. Ensure compatibility with existing PCB footprints and verify moisture sensitivity level requirements for storage and handling.

Selection Notes

Select this component when a compact solution for bipolar stepper motors is required with integrated logic translation. It is suitable for applications needing quarter-step resolution and fixed off-time current regulation. Consider the 36-V load voltage rating and 1.2-A output current capability relative to the motor's electrical requirements.

Part Context

This part belongs to the A3988 family of microstepping drivers from Allegro MicroSystems. It is designed as a drop-in replacement for legacy stepper driver solutions, offering improved efficiency through synchronous rectification. The device is housed in a 36-pin QFN package to minimize board space while providing adequate thermal performance for continuous operation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin-to-pin compatibility if considering alternative stepper drivers from other manufacturers.