A3969SETTR-T

Description：IC MTR DRV BIPOLAR 3V-3.6V 28QFN
Series：-
Mfr：Allegro MicroSystems
Package：Tape & Reel (TR)

SKU:2cc0624fd653 Category: Motor Drivers, Controllers Brand: Allegro MicroSystems

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Product introduction

Product Detailed Parameters

Description：IC MTR DRV BIPOLAR 3V-3.6V 28QFN
Series：-
Mfr：Allegro MicroSystems
Package：Tape & Reel (TR)
Motor Type - Stepper：Bipolar
Motor Type - AC, DC：-
Function：Driver - Fully Integrated, Control and Power Stage
Output Configuration：Half Bridge (4)
Interface：Parallel
Technology：Bipolar
Step Resolution：-
Applications：General Purpose
Current - Output：650mA
Voltage - Supply：3V ~ 3.6V
Voltage - Load：5V ~ 30V
Operating Temperature：-20°C ~ 150°C (TJ)
Mounting Type：Surface Mount
Package / Case：28-VFQFN Exposed Pad
Supplier Device Package：28-QFN (5x5)
Grade：-
Qualification：-

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A3969SETTR-T

Overview

The A3969SETTR-T is a bipolar stepper motor driver manufactured by Allegro MicroSystems. It integrates control logic, an oscillator, and two H-bridge power stages to drive both windings of a two-phase bipolar stepper motor. The device supports full, half, quarter, eighth, and sixteenth-step microstepping modes. Key electrical parameters include a supply voltage range of 5 V to 30 V, a continuous output current of 0.65 A per bridge, and a maximum load voltage of 30 V. It operates within a temperature range of -20°C to +150°C (junction) and is housed in a 28-QFN package.

Feature Summary

Integrates control logic and power stage for two-phase bipolar stepper motors
Supports multiple microstepping resolutions including full, half, quarter, eighth, and sixteenth steps
Features built-in current regulation with constant-on-time PWM chopper

Applications

Two-phase bipolar stepper motor control systems
General purpose motion control applications
Office automation equipment

Procurement Notes

Verify the specific suffix SETTR-T against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with system voltage limits and thermal requirements before procurement. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when driving two-phase bipolar stepper motors requiring integrated control and power stages. Consider the 0.65 A output current limit and 30 V supply voltage range. Evaluate thermal performance given the junction temperature rating and package type for the intended application environment.

Part Context

The A3969 belongs to Allegro MicroSystems' family of bipolar stepper motor drivers. It is designed as a complete solution for driving two-phase stepper motors, combining digital control functions with high-current power outputs in a single IC. This integration simplifies design compared to discrete solutions.