Brushless DC Drivers
QuietMotion™ - precision motor control for whisper-quiet performance.
Allegro’s brushless DC motor drivers combine decades of motion control expertise with advanced integration to accelerate development and performance. Supporting up to100 V systems, our portfolio includes integrated or external gate driver ICs tailored for automotive, industrial, and consumer applications. With ISO 26262-compliant options, embedded QuietMotion™ algorithms, and industry-leading ASIL D support, we deliver compact, precise, and safety-ready solutions for high-efficiency motor control.
Documentation & Resources
Application Note
Pulse-Width Modulation (PWM) Example Code for A89211/12/24
The top-level architecture of the PWM module is shown in Figure 1. The clock frequency (fPWM) of this module is 80 MHz. The register settings are set by the AMBA high-performance bus (AHB).
Application Note
Advanced Negative Voltage Transient Test for Gate Drivers in Automotive Applications
AN296385 - This application note investigates the sensitivity of the gate driver when exposed to transient negative voltage conditions using tests of the Allegro AMT49100 48 V gate driver.
Whitepaper
Revolutionizing eBike and Personal Mobility Motor Control with the A89212 System on Chip
Maximize eBike range and reliability with the A89212 SoC. Featuring a 90V range, ARM Cortex-M4 core, and -18V transient protection for robust, sensorless FOC motor control.
Whitepaper
AM099 - Silence, Efficiency and Intelligence in the Modern Home
The Allegro A89347G, a fully integrated, sensorless, sinusoidal BLDC motor driver, provides a robust solution specifically engineered to meet the demands of residential fans and pumps.
Whitepaper
Power Smarter Tools with the A89212 SoC
Discover how Allegro’s A89212 Motor Control SoC enables faster, more efficient cordless tool designs—across drills, saws, e-bikes, and more.
Guide
A3921 Evaluation Board User Guide
The A3921 is a full-bridge controller for use with external N-channel power MOSFETs and is specifically designed for automotive applications with high-power inductive loads, such as brush DC motors.
Guide
APEK89211 and APEK89212 Evaluation Board User Guide
The A89211 or A89212 (A89211/2) evaluation board is a high performance processor with integrated three-phase gate driver and precision current-sense capability.
Technical Article
Overcoming Battery Cooling Challenges to Enable Safe and Reliable Electric Two-Wheelers
P0276: This article discusses options available in battery technology, commonly used battery cooling methods, requirements and challenges associated with cooling methods, and motor drivers that overcome these challenges.
Guide
A4915MET Evaluation Board User Guide
This evaluation board is used to demonstrate the Allegro A4915MET three-phase MOSFET driver IC.
Guide
A5932GES Evaluation Board User Guide
This evaluation board is used to demonstrate the Allegro A5932GES Three-Phase Sinusoidal Sensorless fan controller IC.
Guide
A4955 Evaluation Board User Guide
This evaluation board is used to demonstrate the Allegro A4955GES full-bridge PWM gate driver IC.
Guide
A89301 Evaluation Board User Guide
The A89301 evaluation board is designed to aid system designers in evaluating the operation and performance of the A89301 motor controller IC.
Guide
A4950 Evaluation Board User Guide
This evaluation board is used to demonstrate the Allegro A4950xLJ full-bridge DMOS PWM motor driver IC.
Application Note
Key Considerations in Design of Sensorless Three-Phase BLDC Motor Driver for Automotive Fuel Pumps
This application note provides details the A89303 device in an automotive fuel pump application. Detailed information about the sensorless control in A89303, advantages of the device, speed control techniques, parameter configuration including efficacy and thermal calculation, EMI consideration, and layout guidelines are presented.
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.