A3977SLPTR-T

Overview

The A3977SLPTR-T is a bipolar stepper motor driver manufactured by Allegro MicroSystems, featuring a 28-pin TSSOP-EP package. It operates with a logic supply voltage of 3V to 5.5V and supports load voltages from 8V to 35V. The device delivers an output current of 2.5A and offers step resolutions of full, half, quarter, and eighth steps. It functions within a junction temperature range of -20°C to 150°C.

Feature Summary

• Integrates a pulse distributor for simplified control via single-step inputs
• Employs DMOS technology for high-efficiency power driving
• Includes adaptive decay mode for optimized current regulation

Applications

• Two-phase microstepping motor systems
• Industrial automation equipment
• General-purpose motion control applications

Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging when sourcing components. Confirm that the 28-TSSOP-EP footprint matches the target PCB layout requirements. Ensure compatibility with the required bipolar stepper motor specifications before finalizing procurement orders.

Selection Notes

Select this component for applications requiring integrated microstepping translation without external logic. The 2.5A output capability suits moderate-power bipolar motors. Verify that the system load voltage remains within the 8V to 35V operational window to ensure proper device functionality.

Part Context

This part belongs to the A3977 family of microstepping drivers. It provides a complete solution combining control logic and power stages in a compact surface-mount package. The design targets users seeking to reduce board space and simplify interface wiring for stepper motor drives.

Replacement Considerations

Check datasheets for alternative Allegro models like the A3987 or A3979 regarding pinout compatibility and current ratings. Verify that substitute parts support the same 28-pin TSSOP-EP package and bipolar drive configuration.