Automotive Hall SensorIn addition to its core component, the Hall integrated circuit, the corresponding magnetic circuit design is another quite important part.

When using a magnetic field as the carrier of motion and position information of the sensed object, permanent magnetic steel is generally used to generate the working magnetic field. For example, with a neodymium iron boron magnet, a magnetic induction intensity of about 200-300mT can be obtained on its magnetic pole surface. In the air gap, the magnetic induction intensity rapidly decreases with increasing distance. To ensure the reliable operation of Hall integrated circuits, the length of the effective working air gap should be considered in applications. When calculating the total effective working air gap, it should beHall chipStarting from the surface. The depth of the Hall chip in the packaged Hall integrated circuit will be provided in the product manual.

becausehall ic When a working power supply is required for motion or position sensing, the magnet is generally made to move with the detected object, and the Hall integrated circuit is fixed in the appropriate position of the working system to detect the working magnetic field, and then extract the detected information from the detection results.