Motor Drivers

Single Gate Driver Design Enables Wide Range of Battery Voltages for Various Motor Power Levels

April 10, 2023

P0239 - This article discusses the challenges of trying to accommodate wide-ranging battery voltages and motor powers in a single driver design.

Integrated Power Loss Brake Features Lower Energy Consumption and Reduce Costs in Data-Center Fan Applications

October 12, 2022

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 ...

Sensorless and Always Without Reverse Rotation: Rapid and Accurate Startup for Blower Fan Motors

September 09, 2022

P0211 - This article describes how initial rotor position detection techniques can overcome torque generation challenges to provide anti-reverse, fast, sensorless startup.

Hall-Based BLDC Gate Drive Saves Microprocessor IO and Provides Zero Speed Torque

September 08, 2022

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.

Single-Platform Design Can Reduce the Cost of Research and Development for Cordless Power Tools

June 30, 2022

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 ...

Modern Motor Drivers Enable a Common Platform for Power Tool Designs

April 15, 2022

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: 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.

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.

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.

Advanced Algorithm Minimizes Stepper Motor Noise and Vibration in Precision Motion Control Applications

April 26, 2021

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.

Racing to Meet the Challenges of Electrification

October 13, 2020

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.

Accurate Startup Techniques in a Sensorless Field-Oriented-Control BLDC (Sinusoidal) Motor Driver

AN296259 - This application note presents various startup techniques available for use with the AMT49406 device.

Motor Drive Discrete MOSFET Bridge Circuit Design and Layout

AN296215 - This application note is intended to familiarize the reader with bridge circuit switching for motor drive applications. Recommendations for circuit design and layout to mitigate EMI and switching transients are provided.

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.

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.