A4984SLPTR-T

Overview

The A4984SLPTR-T is a complete microstepping stepper motor driver manufactured by Allegro Microsystems. It integrates control logic, an oscillator, a current regulator, and a high-side DMOS H-bridge into a single chip. The device supports full, half, quarter, and eighth-step resolutions for bipolar stepper motors. It operates with a supply voltage range of 3V to 5.5V for logic and 8V to 35V for the load. The output stage delivers up to 2A per phase. It utilizes a 24-pin TSSOP package with an exposed pad for thermal management.

Feature Summary

• Integrates a complete microstepping controller with four half-bridge outputs
• Supports multiple step resolutions including full, half, quarter, and eighth steps
• Includes built-in current regulation and overtemperature protection

Applications

• General purpose stepper motor control systems
• Office automation equipment
• Security systems
• Medical devices

Procurement Notes

Verify the specific suffix SLPTR-T against the manufacturer datasheet to confirm the tape and reel packaging configuration. Ensure the ordering information matches the exact pinout and thermal pad requirements specified in the official documentation. Cross-reference the component marking code with the manufacturer's identification guide to prevent counterfeit parts.

Selection Notes

Select this component when a compact solution for bipolar stepper motors is required. It is suitable for applications needing integrated control logic without external microcontrollers. Consider the 2A current capability and the 35V voltage rating for motor compatibility. Evaluate the thermal performance requirements given the TSSOP package size and exposed pad design.

Part Context

This part belongs to the A498x family of stepper motor drivers from Allegro MicroSystems. It serves as a successor or alternative to older models like the A3984. The family provides integrated solutions for motion control, combining power stages with digital control interfaces in small surface-mount packages.

Replacement Considerations

The A3984SLPTR-T is listed as a parameter equivalent replacement. Verify pin compatibility and feature parity before substitution.