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Product Detailed Parameters
- Description：IC MTR DRVR BIPOLAR 3-5.5V 28QFN
- 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, 1/8, 1/16
- Applications：General Purpose
- Current - Output：2A
- Voltage - Supply：3V ~ 5.5V
- Voltage - Load：8V ~ 35V
- 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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Overview
The A4988SETTR-T is a complete DMOS microstepping motor driver with an integrated translator for straightforward operation. Designed to drive bipolar stepper motors in full, half, quarter, eighth, and sixteenth step modes, it features output drivers capable of up to 35V and ±2A. The device includes a fixed off-time current regulator supporting slow or mixed decay modes, automatic current decay mode detection, synchronous rectification for low power dissipation, and comprehensive protection circuits including undervoltage lockout, cross-current protection, thermal shutdown, and short-to-ground protection.
Feature Summary
- Integrated translator simplifies control interface requirements
- Automatic current decay mode detection and selection
- Synchronous rectification reduces power dissipation
- Comprehensive protection against overcurrent, thermal overload, and shorts
Applications
- Motor drive and control systems
- Bipolar stepper motor positioning applications
Procurement Notes
Verify the specific Allegro MicroSystems datasheet for the A4988SETTR-T to confirm electrical characteristics, pinout configurations, and thermal performance data. Ensure compatibility with system voltage ranges and logic levels before integration. Check for any recent product change notices regarding packaging or material compliance updates.
Selection Notes
Select this component for applications requiring precise microstepping control of bipolar stepper motors with minimal external circuitry. Consider the QFN-28 package for space-constrained designs and verify thermal management requirements given the integrated power stage capabilities and operating temperature range specifications.
Part Context
This part belongs to the A4988 family of microstepping drivers from Allegro MicroSystems. It is specifically designed for driving bipolar stepper motors with high precision. The SETTR suffix indicates a tape and reel packaging format suitable for automated surface mount assembly processes.
FAQ
What stepper motor modes does the A4988SETTR-T support?
It supports full, half, quarter, eighth, and sixteenth step microstepping modes.
Does the A4988SETTR-T include internal translation logic?
Yes, it has an integrated translator that allows direct connection to simple step and direction signals.
