In an electric toothbrush, the main function of the Hall switch is to detect the movement state of the brush head. It converts the movement signal of the brush head into an electrical signal by sensing the change of the magnetic field and transmits it to the control system of the electric toothbrush. The control system controls the speed and direction of the motor according to the signal transmitted by the Hall switch to ensure that the brush head can clean the teeth with the correct frequency and force.

Due to the small size of the electric toothbrush and battery power supply, the Hall switch is required to have the characteristics of small size, low power consumption, high sensitivity and low temperature drift. Recommended model: HS251 omnipolar high sensitivity Hall switch

The HS251 Hall effect sensor is a temperature-stable, mechanically stress-resistant, low-sensitivity micro-power Hall sensor. This IC uses advanced chopper stabilization technology to provide accurate and stable magnetic switch points. The product uses dynamic offset elimination technology, which can eliminate the offset voltage caused by package stress, thermal stress, and temperature gradient, and improve the consistency of the device.
The operating voltage of HS251 is only 1.65V, and the internal circuit includes a Hall chip, a voltage regulator module, a signal amplification processing module, a dynamic offset elimination module, a latch module, and a CMOS output stage. Using advanced CMOS technology and overall optimized circuit structure, the product obtains extremely low input error feedback. Unlike other general Hall sensor devices, it does not need to work at a specific south pole or north pole, reducing the trouble of identifying magnetic poles during assembly.
The package type is halogen-free package and has passed third-party inspection.