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开关和闩锁

具有行业领先抖动性能、可优化电机控制的磁性闩锁。彻底改变电机和编码器机械设计的垂直霍尔技术。能够承受十分严苛的汽车电压瞬变。业界广泛的连续时间开关和闩锁产品组合。

Allegro 之所以成为数字位置感应领域当仁不让的领导者，有几种原因。

追求安全？我们的所有开关和闩锁现在都按照 ISO 26262 标准进行开发。

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Hall-Effect Latches and Bipolar Switches

Our high-performance magnetic latches offer you industry-leading jitter performance, EMC/ESD robustness, and magnetic precision—all at competitive price points.

Dual Hall-Effect Latches

Vertical Hall Technology by Allegro (VHT) sensing solutions revolutionize motors and encoders, delivering quadrature signals independent of magnet pitch or air gap.

electric parking brake

Two-Wire Hall-Effect Switches

OEMs and tier one providers choose from our broad portfolio of Hall-effect switches for applications like seat belt buckles, seat track, shift selectors, door ajar, and so much more.

Three-Wire Hall-Effect Switches

Perfect for sensing absolute position or proximity in harsh automotive environments, our three-wire switches are ideal for applications like shift selectors, door ajar, user interfaces and vane-interrupt systems.

Red two-wheeler moped scooter

Micropower Hall-Effect Switches

Extend the life of your battery-powered devices with these integrated Hall-effect sensor ICs. These switches offer low power consumption and are ideal for use in on/off switching applications and for detection of tampering in utility meters.

Close up of automotive gear shifter transmission

Special-Purpose Devices

Don't see the right solution? Take a look at products we've developed for very specific applications. We offer deep and broad applications expertise to help you find—or create—a device that fits your needs.

Featured Products

UA-LH Package

APS12170

Voltage-Controlled Two-Wire Continuous-Time Hall-Effect Latch

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A1260

Chopper-Stabilized Precision Vertical Hall-Effect Latch

APS12450 Product Image

APS12450

Three-Wire Hall-Effect Latch with Advanced Diagnostics

APS11500

Two-Wire Hall-Effect Switch

Documentation & Resources

Programming a Back Biased Switch for Proximity Sensing

This application note assumes the user is programming an Allegro fully integrated back biased Hall effect switch or that the user has designed an appropriate magnetic circuit to accommodate the programming range of a programmable unipolar Hall effect switch.

Application Note

Introduction to Hall-Effect Switches and Conversion from Mechanical Switches

AN296192 - This application note will discuss the technical considerations necessary to aid with the replacement of an on/off mechanical switch with a Hall-effect switch.

Application Note

General Applications Using The APS13568

AN296238 - In this applicate note, we discuss the use of the APS13568, an integrated circuit that combines an ultra-sensitive, omnipolar, micropower Hall-effect switch with a linear programmable current regulator which can provide up to 150 mA current to drive high brightness LEDs.

Application Note

Two Wheeler Stop/Tail LED Driver

AN296207 - This application note describes the use of the APS13568 LED driver with Hall-effect switch and the A6261 LED driver integrated circuit (IC) from Allegro MicroSystems for automotive two-wheeler RCL applications.

Application Note

Two-and-Three-Wire-Sensor-Interfaces

AN296233 - Electrical interfaces for active sensor integrated circuits (ICs) include both two-wire and three-wire interfaces. These two technology styles are named for the number of required connections needed to communicate the sensor output. This application note discusses use and tradeoffs of ...

Micro-Power Position Sensing in Cell Phone Applications

This note will show how to use the Allegro™ A1171 in a standard flip or slide phone, as well as techniques for sensing three positions using only one magnet and one Hall device in a multipurpose application.

Latching Switch Hall-Effect IC Basics

There are four general categories of Hall-effect IC devices that provide a digital output: unipolar switches, bipolar switches, omnipolar switches, and latches. Latching Hall-effect sensor ICs, often referred to as "latches," are digital output Hall-effect switches that latch output states.

Digital Position Sensor ICs—Continuous-Time to Chopper-Stabilized Cross-Reference Guide

This application guide will outline the differences between the two sensor types and provide system designers with the tools needed in order to select the appropriate sensor for their system.

Improved Speed and Direction Sensing Using Vertical Hall Technology

The A1262 2D dual-channel Hall-effect sensor IC is offered in a 5-pin SOT23W surface-mount package, as well as a 4-pin SIP through-hole package. It features operation with traditional planar—as well as vertical—magnetic field direction.

Air-Gap-Independent Speed and Direction Sensing Using the Allegro A1262

The A1262 integrated circuit is an ultrasensitive dual-channel Hall-effect latch. As with conventional dual-channel latches, the quadrature outputs of the A1262 indicate rotation direction and position/speed of a rotating ring magnet target.

Vehicle Safety Systems

Occupant safety is one of the most critical elements of the automobile design. As a result, safety systems continue to become more sophisticated in order to limit, and ultimately prevent, personal injury in the case of an accident.

Ring Magnet Speed Sensing for Electronic Power Steering

Proper control of Electric Power Steering (EPS) systems requires both speed and direction information from the steering input shaft. This control will typically come from both high-resolution speed information and fairly coarse position information.