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
Guide
AMT49400 Evaluation Board User Guide
The AMT49400 evaluation board is designed to aid system designers in evaluating the operation and performance of the AMT49400 integrated sensorless FOC BLDC driver IC.
Guide
A4915MET Evaluation Board User Guide
This evaluation board is used to demonstrate the Allegro A4915MET three-phase MOSFET driver IC.
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.
Application Note
Reverse Battery Protection Scheme for Automotive Applications
AN296275: This application note discusses a method to protect automotive systems that contain Allegro MicroSystems motor driver integrated circuits from an accidental reversal of battery polarity.
Application Note
Bootstrap Supply and Circuit Guidelines
This application note describes the operation of the bootstrap circuit and guidelines in selecting a bootstrap capacitance value to ensure normal operation of the gate drives.
Brochure
Brochure: Full-Bridge Gate Drivers for Automotive and Industrial Applications
The solid-state A89505 and A89506 are designed for a range of vehicle applications, including various actuators, EV charger locks, electronic parking brakes, and folding mirrors.
Application Note
Microstepping Motor-Driver IC with Integrated Step and Direction Translator Interface
A new series of microstepping motor driver integrated circuits with an integrated step and direction translator interface has been developed specifically by to drive bipolar stepper motors. These new ICs incorporate several unique design features, including automatic mixed-mode current decay control.
Whitepaper
48V 系统如何革新机器人技术 New
工业自动化对更强大、更高效机器的需求持续增长，机器人技术正以惊人的速度迅猛发展。这一趋势推动了供电电子系统的重大变革 — 从传统的 12V 架构向更高电压，尤其是 48V 系统转型。
Brochure
Brochure: Automotive BLDC Gate Driver with Integrated FOC Algorithm
Designed for battery cooling fans and HVAC systems in EV and hybrid vehicles, the A89307 offers ultra-low noise and vibration by using a Field Oriented Control (FOC) algorithm to drive continuous sinusoidal current to the load, helping automakers reduce noise and improve battery life.
Technical Article
Efficient and Reliable Solutions to Meet New Emission Standards in Two-Wheelers
P0255: This article discusses the challenges that two-wheeler designers face when switching to an EFI system, notably a 100 ms fast startup requirement.
Technical Article
Common Driver Platform for 12V and 48V Systems Simplifies EV Starter Generator Designs
This article discusses how using a common platform for both 12V and 48V starter generator systems will simplify and ease the transition to 48V solutions, as the electrical revolution continues to transform the automotive industry.
Technical Article
Sensorless and Always Without Reverse Rotation: Rapid and Accurate Startup for Blower Fan Motors
How initial rotor position detection techniques can overcome torque generation challenges to provide anti-reverse, fast, sensorless startup.
Application Note
AMT49100 & AMT49101: How to Enable / Disable the Buck Regulator
AN296217 - This application note describes how to switch between buck enabled and buck disabled operation on any variant of the AMT49100 or AMT49101 gate diver family.
Technical Article
Reduce Design Time by Simplifying Code Development in Ceiling Fan Applications.
P0244: This article highlights how existing code-free field-oriented-control (FOC) sensorless BLDC motor controllers solve the challenges of ceiling fan applications.
Technical Article
单一平台设计可降低无绳电动工具的研发成本
P0193 - Power Tool engineers are duplicating resources with current product designs as they often use different motor drivers, manufacturers, design layouts for each product variation. This article reviews options to utilize a single platform in a wide array of applications – saving design time and complexity, improving time-to-market, and reducing overall cost.