0 ～400 A 導線内蔵電流センサー IC

Allegro MicroSystems has been driving innovation in the current sensor industry for more than 17 years, with a history of first-to-market products that give our customers a competitive edge. Our advanced ICs help you achieve higher efficiency and power density in your designs.

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.

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.

AN296181 - Determining the accuracy of a system requires knowledge of the error introduced by each component. When looking at Allegro current sensor datasheets, the total error line item is a good approximation of the worst-case error seen in application.

Charge into the future of vehicle electrification with the world's #1 supplier of current sensor ICs for leading EV applications.

This application note describes simple methods for increasing the measurable current range. These methods involve splitting the path of the current being sensed. Various options of devices and circuits are described.

Allegro MicroSystems offers a wide range of current sensor IC solutions that fall into two main categories: ICs having an integrated current-carrying conductor and ICs designed to be used with an external magnetic core.

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.

AN269114 - Traditional open-loop current sensor ICs, like the Allegro ACS758CB and ACS770CB families, have ferromagnetic cores that act as magnetic concentrators. They concentrate the magnetic flux density, the B field, generated by current flowing through a conductor onto the Hall-effect sensor IC.

This application note will discuss the mechanism of CMR and focus on how to best use this mechanism through optimized circuit board design and layout for sensors that need an external magnetic core, sensors that have a core built into the package, and sensors that have an integrated current-carrying loop but no core.

To control the drive train in HEV and full EV vehicles, it is well-known that current sensing is required particularly in starter generator and main electric drive motor generator applications.

AN296182 - When measuring busbar current with a surrounding soft ferromagnetic concentrator cores, Allegro recommends using a linear IC, such as the A1365, A1367, or ACS70310, in conjunction with a ferromagnetic core for high-current measurement (above 200 A).