電界センサー 0～1000 A 超センサー IC
要求の厳しい車載および産業用アプリケーションにおいて、当社のフィールド電流センサは、浮遊磁界耐性と高度な診断機能による堅牢な性能を発揮し、比類のない精度の電流検出を実現します。
Featured Products
ACS37630
The ACS37630 is a contactless current sensor using Allegro’s high-precision vertical Hall technology.
ACS37610
The ACS37610 is a truly coreless, high precision, Hall-Effect current sensor with common-mode field rejection and high bandwidth ideal for electric vehicle (EV) applications.
CT455
The CT455 is a high bandwidth and low noise integrated contactless current sensor that enables high accuracy current measurements.
ACS70310/ACS70311
240kHz, Highest Accuracy Programmable Linear Sensor with Reverse Battery Protection
当社のホール効果に基づくリニア電流センサー ICS については、以下を参照してください。
Documentation & Resources
Application Note
Improved Performance and Features of Allegro’s Next Generation, High Power Density CB Package Current Sensors
This application note will describe the use of the new high current ACS772 Hall-effect current sensor integrated circuit (IC) from Allegro MicroSystems and will give an overview
of its features and improvements from previous Allegro high-current sensors.
Application Note
Achieving Closed-Loop Accuracy in Open-Loop Current Sensors
Closed-loop current sensing technology is employed in many industrial and automotive applications for accurate current sensing. Allegro MicroSystems has developed magnetic-based current sensor IC solutions that achieve near closed-loop accuracy using an open-loop topology.
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.
Application Note
Advanced Hall-Effect Linear Current Sensor IC Enables High BW Sensing in Hybrid Electric Vehicles and other High Current Sensing Applications
The Allegro™ A1366 linear Hall-effect sensor IC has been designed to meet the high bandwidth, high accuracy requirements of HEV inverter applications.
Application Note
Guidelines for Designing a Concentrator for High-Current Sensing Applications with an Allegro Hall-Effect Sensor IC
A concentrator focuses magnetic flux lines, which are generated by electrical current flowing through a conductor, at the center of the air gap, where the Hall-effect magnetic sensor IC is positioned.
Application Note
An Effective Method for Characterizing System Bandwidth in Complex Current Sensor Applications
This application note describes multiple methods for measuring
and characterizing system bandwidth, with a focus on
the impulse response method. Allegro’s ACS720 is the perfect device to validate the test methods outlined here.
Application Note
Crosstalk Error Estimation and Reduction Through Busbar Design for the ACS37610 Coreless Current Sensor
This application note can be used to estimate the crosstalk error for adjacent notched busbars in combination with the ACS37610 coreless differential Hall sensor. This information can be useful when designing, for example, the three phases of a traction inverter.
Application Note
Increasing System Safety using the A1365 Programmable Linear Hall-Effect Sensor IC with Self-Test Diagnostic Mode
As safety goals multiply throughout the system design process, customers demand smart sensors that can be used to diagnose abnormalities in a system. The built-in Self-Test mode of the A1365 grants users such insight into their systems.
Application Note
Transient Current Behavior in Applications using the Allegro Coreless ACS37610 Differential Current Sensor
AN296258 - This application note explains how the conductor design can impact the response time of the current measurement for coreless current sensing applications and provides examples of response time to transient current for two types of conductors.
Application Note
Material Selection and Geometry Considerations for High Current Sensing Magnetic Flux Concentrator Designs
AN296245 - Core material selection, geometry, and air gap dimensions will all impact the performance of the flux concentrator. This note will explain each of these factors and provide a detailed guide for design of a magnetic flux concentrator.
Application Note
Overcurrent Fault Detection Using ACS37610 Coreless Current Sensor
AN269241 - This application note explains how the Overcurrent-Fault (OCF) feature of Allegro ACS37610 device can be used in application to reliably detect overcurrent conditions and how it can be configured to optimize accuracy and cover different application needs.
Application Note
ACS37600 Reference PCB Design for Current Sensing Module Applications
AN296205 - The aim of this document is to provide guidelines for designing a PCB for the ACS37600 while minimizing possible undershoots/overshoots due to a fast current step response.
Application Note
ACS37610 Busbar Geometry and Design Techniques for Coreless Differential Current Sensors
AN296194 - The purpose of this application note is to offer guidelines for selecting the optimum combination of ACS37610 and busbar geometry for a given current sensor application and its specific requirements.
Application Note
Notched Busbar Design Guidelines For Coreless ACS37610 Differential Current Sensor
AN296231 - This application note focuses on how a busbar should be designed to achieve optimum performance with the ACS37610 coreless current sensor.
Brochure
Brochure: Allegro Coreless Current Sensing
Allegro’s Coreless Current Sensing Technology provides a highly accurate method of measuring hundreds or thousands of amps flowing through a busbar or a PCB without needing a concentrator core or U-Shaped Magnetic Shield.