The Allegro high current sensor IC packages are fully integrated current sensor solutions that provide high accuracy and reliability. These sensors are automotive-grade devices that can take the heat and deliver highly accurate open-loop current sensing in the harshest applications environments.
The CA and CB packages contain the primary conductor, concentrating ferromagnetic core, and analog output Hall-effect linear sensor in a single IC package. The conductor resistance is 100 µΩ (typical) for ultralow power loss when sensing current up to 200 A. The CA and CB packages also provide 3000 VRMS or higher galvanic isolation for use in line-side or high-voltage applications.
The new LR package is a true surface coreless sensor option that can handle up to 100 A continuous current in a very small form factor. The differential sensing technology provides immunity to interfering fields. The LR package resistance is only 200 µΩ and provides up to 100 VDC galvanic isolation.
The Allegro medium current devices are much smaller than bulky current transformers and have the added advantage of sensing both AC and DC currents.