Stepper Motor Drivers
QuietStep™—precision stepper motor control with ultra-low noise and vibration.
Allegro’s stepper motor drivers deliver smooth, efficient motion with ultra-low noise and vibration—powered by our proprietary QuietStep™ technology. Designed for office automation, industrial, and automotive systems, these drivers use adaptive algorithms to minimize torque ripple and current distortion in real time, enhancing step accuracy and overall system performance across diverse operating conditions.
Featured Products
AMT49700
Stepper Motor Driver IC with Single-Step Control and Adjustable Microstep Resolution for Fine Positioning and Programmable Motion Control
A5984
DMOS Microstepping Driver with Translator and Overcurrent Protection (OCP)
A5988
Quad DMOS Full-Bridge PWM Motor Driver
A3901
The A3901 is a dual full-bridge motor driver, designed for low voltage portable applications involving bipolar stepper or brush dc motors. The outputs have been optimized for low voltage drop, with currents up to ±400 mA (±800 mA with outputs paralleled) and an operating voltage range of 2.5 to 5.5 ...
Product Selection Guide
Documentation & Resources
Application Note
Innovative Back EMF Based Stall Detection Simplifies Stepper Motor Designs
Many applications require reliable detection of reaching a mechanical endpoint without using an external sensor, and motor stall detection can be used instead. This article describes an innovative method of small stepper motor stall detection and its application.
Brochure
Innovative Motor Control
With decades of experience, our embedded motion control algorithms in our motor driver ICs simplify designs while improving motor performance and time to market. Download brochure to learn more.
Whitepaper
Innovative FOC Motor Control: Improve Time to Market by Eliminating Software Development
This paper will focus on the basics of the sensorless control algorithm, the advantages of different sensing techniques, and how the GUI can drive a full-featured sensorless sinusoidal BLDC motor with no software programming required.
Application Note
Improving Batwing Power Dissipation
AN295015 - Allegro MicroSystems’ stepper motor ICs are power ICs encapsulated in DIP (dual in-line), SOIC (small outline integrated circuit), and PLCC (plastic leaded chip carrier) packages. The silicon die is directly bonded to a heat-spreading lead frame (batwing).
Brochure
A Scalable Approach to Power Tool Designs
Achieve all of your design goals for voltage and power levels with a single-platform architecture by combining Allegro drivers, sensors, and regulators.
Application Note
Hot-Swap Testing Results for the A5977 and A5979 Microstepping DMOS Drivers
This report outlines hot-swap test results for A5977 and A5979 stepper motor drivers. To duplicate the hot-swap conditions, we have selected an IC motor supply voltage (VBB) of 24 V and motor current of 1.5 A per winding for our tests.
Technical Article
Advanced Algorithm Minimizes Stepper Motor Noise and Vibration in Precision Motion Control Applications
Stepper motors offer unique advantages over direct current (DC) and brushless DC (BLDC) motors in many applications. A bipolar stepper provides accurate open-loop position as well as zero-speed torque without using a control loop or external sensors.