A3979SLPTR-T

Description：IC MTR DRV BIPOLR 3-5.5V 28TSSOP
Series：-
Mfr：Allegro MicroSystems
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:1dd28e75350f Category: Motor Drivers, Controllers Brand: Allegro MicroSystems

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Product introduction

Product Detailed Parameters

Description：IC MTR DRV BIPOLR 3-5.5V 28TSSOP
Series：-
Mfr：Allegro MicroSystems
Package：Tape & Reel (TR),Cut Tape (CT)
Motor Type - Stepper：Bipolar
Motor Type - AC, DC：-
Function：Driver - Fully Integrated, Control and Power Stage
Output Configuration：Half Bridge (4)
Interface：Logic
Technology：DMOS
Step Resolution：1, 1/2, 1/4, 1/16
Applications：General Purpose
Current - Output：2.5A
Voltage - Supply：3V ~ 5.5V
Voltage - Load：8V ~ 35V
Operating Temperature：-20°C ~ 150°C (TJ)
Mounting Type：Surface Mount
Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package：28-TSSOP-EP
Grade：-
Qualification：-

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A3979SLPTR-T

Overview

The A3979SLPTR-T is a bipolar stepper motor driver manufactured by Allegro MicroSystems, featuring an integrated DMOS full-bridge architecture with a built-in translator. It operates within a supply voltage range of 3V to 5.5V and supports load voltages from 8V to 35V. The device delivers a continuous output current of 2.5A and includes four half-bridge outputs. It offers selectable microstepping resolutions of 1, 1/2, 1/4, and 1/16 steps. The component is housed in a 28-TSSOP-EP package with an exposed pad for thermal management and functions across a junction temperature range of -20°C to 150°C.

Feature Summary

Integrates a translator for simplified logic control of bipolar stepper motors
Features a fully integrated DMOS power stage with overcurrent protection
Supports multiple microstepping resolutions including full, half, quarter, and sixteenth step modes

Applications

Bipolar stepper motor control systems
General-purpose motion control applications
Industrial automation actuators

Procurement Notes

Verify the specific suffix 'SLPTR-T' against the manufacturer's official datasheet to confirm pinout compatibility and thermal pad specifications. Ensure that the procurement source provides documentation confirming RoHS3 compliance and MSL level 2 moisture sensitivity ratings. Cross-reference the part number with Allegro MicroSystems' current production status to avoid obsolete stock issues.

Selection Notes

Select this component when a single-chip solution for bipolar stepper motors is required with high current capability up to 2.5A. It is suitable for designs needing integrated translation logic to reduce microcontroller overhead. Consider the 28-TSSOP-EP package for its thermal dissipation advantages in space-constrained PCB layouts requiring robust heat transfer through the exposed pad.

Part Context

This part belongs to the A3979 series of motor drivers from Allegro MicroSystems. It is distinct from similar models like the A3977 or A4979 by its specific combination of 2.5A output current, 35V load voltage rating, and 28-pin TSSOP packaging. The 'T' suffix indicates tape and reel packaging for automated assembly processes.