A3984SLP-T

Overview

The A3984SLP-T is a complete microstepping motor driver with a built-in translator, designed for bipolar stepper motors. It supports full-, half-, quarter-, and sixteenth-step modes. The device features an output drive capacity of up to 35 V and ±2 A. Key electrical parameters include a supply voltage range of 3 V to 5.5 V and a load voltage range of 8 V to 35 V. It operates within a temperature range of -20°C to 150°C (TJ). The component utilizes DMOS technology and is housed in a 24-TSSOP-EP package.

Feature Summary

• Integrates a built-in translator for simplified operation without external logic controllers.
• Supports multiple stepping resolutions including full, half, quarter, and sixteenth steps.
• Features automatic current decay mode detection and selection for optimized performance.
• Includes internal under-voltage lockout and thermal shutdown circuitry for protection.

Applications

• Bipolar stepper motor control systems
• Microstepping motion control applications
• General purpose motor drivers

Procurement Notes

Verify the exact part number suffix against official Allegro MicroSystems documentation, as variations such as A3984SLPTR-T exist. Confirm RoHS compliance status, as some listings indicate non-compliance while others specify RoHS3. Ensure the package type matches the required 24-TSSOP-EP specification with exposed pad for thermal management.

Selection Notes

Select this component when a fully integrated solution with a built-in translator is required for bipolar stepper motors. It is suitable for applications needing support for various microstepping resolutions up to 1/16 step. Consider the ±2 A output capability and 35 V load voltage rating for appropriate motor sizing. Verify thermal requirements due to the high junction temperature rating.

Part Context

The A3984 belongs to Allegro's family of DMOS microstepping drivers with translators. It is functionally similar to the A3983 and A4983 but offers specific output configurations. The part is available in surface-mount packages designed for efficient heat dissipation through an exposed pad.

Replacement Considerations

A3984SLPTR-T is listed as a parameter equivalent. A4982SLPTR-T is also identified as a substitute option.