A3983SLP

Overview

The A3983SLPTR-T is a DMOS microstepping driver with an integrated translator, designed for bipolar stepper motors. It operates on a 3V to 5.5V logic supply and supports load voltages from 8V to 35V. The device features four half-bridge outputs capable of delivering up to 2A output current. It offers selectable step resolutions including full, half, quarter, and eighth steps. Key electrical parameters include a maximum IGBT collector current of 2A and a maximum Vceo of 35V. The component is housed in a 24-pin TSSOP package with exposed pad.

Feature Summary

• Integrates a translator to simplify control by accepting simple step and direction inputs without requiring complex external logic.
• Features automatic current decay mode detection and selection, supporting both mixed and slow decay modes for optimized motor performance.
• Includes internal protection circuits such as under-voltage lockout (UVLO), thermal shutdown, and crossover-current protection.

Applications

• Bipolar stepper motor control in office automation equipment
• Motion control systems in industrial machinery
• Precision positioning applications in medical devices

Procurement Notes

Verify the complete part number, specifically the suffix indicating packaging type such as TR for tape and reel or CT for cut tape. Confirm the manufacturer is Allegro MicroSystems to ensure authenticity. Check datasheet revisions for any pinout or electrical specification updates before finalizing procurement specifications.

Selection Notes

Select this component when a fully integrated solution for bipolar stepper motors is required. It is suitable for applications needing low RDS(ON) outputs and synchronous rectification to minimize power dissipation. Ensure the load voltage does not exceed 35V and the logic supply remains within the 3V to 5.5V range.

Part Context

This part belongs to the A3983 series of DMOS microstepping drivers. It is functionally similar to other Allegro microstepping drivers like the A4983 but may differ in specific electrical ratings or package options. The SLPTR suffix typically denotes the TSSOP-24 package variant.

Replacement Considerations

Direct substitutes include the A4983SLPTR-T and A3977SLPTR-T. Verify that replacement parts match the required output current and voltage ratings. Ensure compatibility with existing PCB footprints and control logic interfaces before substitution.

FAQ

What step resolutions are supported by the A3983SLPTR-T?

The device supports full, half, quarter, and eighth step resolutions, which can be selected via external pins.

Does the A3983SLPTR-T require an external clock signal?

No, it includes an internal translator that allows operation using only Step and Direction input signals.