Reasons why the Hall switch element does not work

Reasons that cause (cause) the Hall sensor to not work or be damaged

Generally speaking, the Hall element can be used either when it is installed on the product, or it cannot be used when it is installed on the product. If it is installed and used for a period of time, and it is found that the Hall element does not work, has unstable performance or is damaged, that is Because the Hall element has been in an unsuitable environment for a long time, if you encounter this situation, you can check it from the following aspects:

1. Whether the voltage and current are stable for a long time (the biggest reason for Hall failure) and whether they are within the working voltage range

2. Are some of the magnets supplied by the magnet supplier demagnetized after a period of time, resulting in some Hall inductors not being able to sense them?

Also pay attention to the spacer between the Hall element and the magnet (the spacer will also demagnetize)

3. For the Hall switch, is the pull-up resistor connected damaged, resulting in a very small resistance?

4. Whether the working environment temperature exceeds the rating of the Hall element. Excessive temperature may cause damage to the Hall switch chip and may also cause demagnetization of the magnet.