Current Sensors
Precision current sensing for efficient, high-voltage designs.
Allegro’s current sensors deliver galvanic isolation, lossless operation, and high-precision accuracy—enabling maximum efficiency and power density in compact systems. Designed for EV traction and auxiliary inverters, DC-DC converters, on-board chargers, solar inverters, and industrial power systems, our solutions offer isolation ratings up to 5 kVRMS, ultra-low conductor resistance down to 0.1 milliohms, and bandwidths up to 5 MHz for GaN/SiC power electronics.
Browse by category
Field Current Sensors
Achieve unparalleled accuracy in current sensing with our field current sensors, designed for robust performance with stray field immunity and advanced diagnostics in demanding automotive and industrial applications.
Integrated Current Sensors
Our integrated current sensors combine precision measurement with built-in isolation for compact, high-efficiency designs.
Documentation & Resources
Blog
Beyond the Datasheet: Mastering Current Sensing Selection New
Master current sensor selection with expert guidance on technology trade-offs to design safer, more efficient, dependable solutions.
Blog
Rise in Robotics: Driving Efficiency, Reliability and Innovation
Robotics is no longer a futuristic concept confined to science fiction; it is a rapidly evolving field transforming industries and daily life.
Technical Article
Solving EV Charging with High-Performance Gate Drivers and Current Sensors
Before EVs can reach true widespread adoption, one of the biggest obstacles is the accessibility, reliability and performance of EV chargers.
Technical Article
ClearPower Modules Tackle Designers’ Toughest Challenges
ClearPower modules house all the principal elements of a high-performance switching power supply or LED driver within a compact package, significantly easing the task of designing complete power solutions and solving difficult EMI challenges.
Technical Article
Rethink PCB Current Sensing
This article will discuss two new innovative approaches to measure currents up to 600 A in PCB: a near-lossless Hall-based current sensor with an integrated conductor and a non-invasive standalone core-free and shield-free differential Hall current sensor.
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.
Application Note
Transmission Gear Tooth Sensing
AN296221 - In this application note learn how our industry-leading, time-proven algorithms included on our transmission ICs have been designed to handle the most stringent application conditions.
Application Note
Benefits of Dynamic Threshold Feature in ATS16351, GMR Back-Biased Speed Sensor IC
AN296257 - The Allegro ATS16351PSM [1] is a True-Power-On-State (TPOS) sensor providing the speed and position of a rotational ferromagnetic target.
Technical Article
Breaking the Density Barrier: A Technical Deep Dive into Simplified SiC Gate Drive
Learn how Power-Thru™ isolated SiC gate drivers eliminate the need for bulky external bias supplies, drastically reducing BOM count and PCB size by up to 50%. Solve EMI and power density challenges in your next high-voltage design.
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
New 400 kHz Current Sensors Enable More Sustainable Designs in Switch-Mode Power Designs
Really Cool. Really Efficient. New 400 kHz current sensors enable more sustainable designs in switch-mode power designs.
Technical Article
Solar Energy Systems – New Market Trends in Current Sensing
P0103 - As solar installations grow larger and more ambitious by the day, new trends in current sensing are emerging for this expanding energy market.
Application Note
CMTI Comparison for Allegro Integrated Conductor Current Sensors
Common-mode transient immunity (CMTI) test injects transient voltages with high slew rates across the isolation barrier of the current sensor. During the transient event, the output stability of the device is observed.
Case Study
Shifting the Future of Electric Vehicles
The technology used in eVibe’s system started out as antivibration control for gas-powered vehicles. But as the market for personal vehicles began to shift toward electric, GHSP redirected its efforts.
Brochure
Intelligent Power Distribution Solutions for Modern Servers
In today's demanding data center environments, efficient and reliable power distribution is critical. Server racks face increasing power density demands, requiring intelligent PDUs that can scale, adapt, and provide real-time monitoring and control.
Brochure
Silent Power Behind Every Wash New
The home appliance market is undergoing a transformation, with consumers demanding laundry solutions that are not only powerful and effective but also energy-efficient, quiet, and intelligent.
Blog
Magnetic Sensors are a Great Alternative to Traditional Shunt Resistors for Industrial Current Sensing
Magnetic sensors have entered the market, bringing a whole new level of performance, safety, and reliability to the table, much like what Allegro is doing with our current sensor portfolio. So, what makes them so special? Let's discuss.
Brochure
Brochure: Lift Designs to the Next Level
Drive mobile robots with unmatched precision and control.
Application Note
AN296331 - How to Choose the Best Micropower Switch or Latch Magnetic Sensor for Your Application
This application note discusses the fundamental principles that govern micropower switch and latch magnetic sensors.
OnDemand Webinar
Magnetic Sensing: Maximizing Battery Life in Industrial and Consumer Applications
Join our webinar for a refresher on magnetic sensing technologies and an exploration of the latest technical innovations aimed at reducing power consumption in these versatile, reliable, and high-performance solid-state sensors.
Technical Article
Magnetic Sensor ICs Offer Integrated Diagnostics for ASIL Compliance
The ever-evolving requirements of the automotive, industrial, and commercial markets for increased reliability and functionality will continue to drive demand for electronic content, including non-contact magnetic sensor ICs with diagnostics.
Technical Article
Magnetic Position Sensors Efficiently Drive E-Bike with Pedal Assist Systems
This technical article describes two designs for the pedal-rate measurement: a design using a pair of one-dimensional (1D) magnetic position sensors, which is common; and a two-dimensional (2D) magnetic speed and direction sensor design.
Video
GHSP and Allegro MicroSystems' Partnership
GHSP and Allegro MicroSystems' long-standing partnership has redefined EV design, pushing boundaries with cutting-edge technologies.
Video
XtremeSense™ TMR Technology
Allegro MicroSystems empowers engineers to deliver top-tier solutions with XtremeSense™ TMR technology, enabling industry-leading precision and cost efficiency in current and position sensors.
Blog
The Unsung Hero of AI: Why Advanced Fan Drivers are a Data Centers Most Valuable Player
For data center operators, choosing a fan driver isn't a trivial component choice, it's a strategic decision that directly impacts efficiency, reliability, and the bottom line.
Blog
Precision in Motion: Advanced Sensing for Industrial Control
Explore how the world of industrial automation, precision and reliability are not just goals; they are absolute necessities. Whether it's a multi-axis robotic arm, a smart valve, or a complex human-machine interface (HMI), the ability to accurately and dependably track motion and position is critical.
Blog
Cobots: Revolutionizing Manufacturing through Human Robot Collaboration
Collaborative robots (cobots) are fundamentally changing the landscape of industrial automation. They combine the precision and consistency of automation with human intelligence and adaptability.
Blog
Switches vs. Latches: Understanding the Key Differences and Their Applications
Discover how Hall-effect switches and latches, essential magnetic sensors, power smartphones, industrial equipment, automotive systems, and DC motors. Learn their differences and applications in this insightful blog post.
Whitepaper
Maximizing Robust Window Open Detection Systems with Micropower Hall-Effect Switches and Latches
Let's explore the intricacies of designing a robust and effective window open detection solution for
security systems.
Application Note
AN296330 - Selecting the Right Magnetic Switch or Latch for Your Application
This application note is intended to provide a step-by-step process to help designers pick the right Allegro switch or latch part for their specific application.
Whitepaper
Key Challenges in Expanding EV Charging Infrastructure
This whitepaper highlights Allegro's commitment to enabling a sustainable and convenient EV charging experience for all.
OnDemand Webinar
Electric Vehicle Thermal Management Challenges from a Semiconductor Perspective
Join us as we examine the fascinating world of Electric Vehicle (EV) thermal management, where we'll uncover the key challenges and innovative solutions shaping the future of transportation.
OnDemand Webinar
The Evolution of eVibe with GHSP and Allegro MicroSystems
Through this recorded roundtable, learn about how the long-standing partnership between GHSP and Allegro MicroSystems has redefined electric vehicle (EV) design, pushed boundaries and set new standards in driver experiences.
OnDemand Webinar
Highly Efficient Power Conversion in Clean Energy Applications
Discover how to achieve high efficiency in energy conversion of alternating current (AC) and direct current (DC) utilizing next generation field-effect transistors (FETs) made of gallium nitride (GaN).
Whitepaper
Next Generation Performance with XtremeSense™ TMR Technology
XtremeSense TMR Technology is a cutting-edge solution offering distinct advantages over conventional magnetic sensors. Ideal for high-precision and high-current applications like clean energy, xEV, industrial and consumer.