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.
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BLDC Drivers
Drive your brushless DC motors with precision and efficiency using our advanced BLDC drivers, enabling smooth and powerful motion control.
Integrated Control BLDC Drivers
Simplify motor control with our integrated control BLDC drivers, offering intelligent algorithms for efficient and precise operation without complex external programming.
Documentation & Resources
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.
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.
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
Single Gate Driver Design Enables Wide Range of Battery Voltages for Various Motor Power Levels
P0239 - This article discusses the challenges of trying to accommodate wide-ranging battery voltages and motor powers in a single driver design.
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Technical Article
Hall-Based BLDC Gate Drive Saves Microprocessor IO and Provides Zero Speed Torque
P0127: Many BLDC motor applications require Hall-based position sensing to accommodate direction changes quickly and provide holding torque.. Allegro gate driver ICs with integrated Hall commutation are designed with the Hall-based commutation engine integrated into the IC.
Technical Article
Integrated Power Loss Brake Features Lower Energy Consumption and Reduce Costs in Data-Center Fan Applications
Service interruptions of servers can result in adverse scenarios including inefficient airflows created by fan blades that have lost power to maintenance in the presence of fan blades. This article introduces power loss brake (PLB) functionality and how lost power can be harnessed to improve efficiency while simplifying fan design.
Technical Article
Single-Platform Design Can Reduce the Cost of Research and Development for Cordless Power Tools
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.
Technical Article
Modern Motor Drivers Enable a Common Platform for Power Tool Designs
Our brushless DC motor drivers help you design a common platform to address both high power and lower power designs. We integrate functions to allow for a single-platform approach, reducing engineering development cycles and improving time to market.
Brochure
Brochure: Code-Free Gate Drivers for Data-Center Cooling Fans
Our portfolio of three-phase BLDC motor drivers includes solutions with integrated MOSFETs or gate drivers, as well as options for power loss braking for high efficiency.
Video
A4915 Demo Board Video
The Allegro A4915 Three-Phase MOSFET Driver’s innovative speed input and fully integrated block commutation delivers simple speed control of a BLDC motor with a single analog voltage.
Video
A4915 Product Overview Video
The Allegro A4915 Three-Phase MOSFET Driver’s innovative speed input and fully integrated block commutation delivers simple speed control of a BLDC motor with a single analog voltage.
Technical Article
Racing to Meet the Challenges of Electrification
Governments around the world, including the European Union and the United States, have placed mandatory fuel economy standards on combustion engines to reduce emissions. These initiatives will require innovative advances in technologies, driving the demand for increased efficiencies.