Bipolar latching Hall switch AH401F can replace SS41F for brushless motor of mahjong machine

Mahjong machines can be seen everywhere in life. The working principle of a mahjong machine is that the mahjong tiles facing up are attracted by the magnetic ring on the shuffle barrel and rotate with the magnetic ring to the conveyor trough. At the front end of the machine, the stacking motor pushes the mahjong pieces into the cutting board, which is pushed away by the chain rod, while the mahjong pieces without the magnetic front continue to rotate on the plate (single-mouth machine principle). This application is the working method of most mahjong machines currently used on the market. Then some new fully automatic mahjong machines have been upgraded to four-mouth machines.

The Hall switch used in mahjong machines is mainly used in the motors of mahjong machines, and generally adopts a high-voltage bipolar latch Hall switch chip. A circular magnet is fixed on the rotor, and three Hall elements are installed on a Hall board at an angle of 60 degrees. The two Hall elements on the sides are installed in the forward direction, and the one in the middle is installed in the reverse direction. When the rotor rotates, the magnet rotates with the rotor, and the N-pole and S-pole magnetic fields alternately sweep through the three Hall elements to generate signals, and the speed of the rotor is calculated by this signal. Because three Hall chips are used, the specific position change of the rotor can be judged by the difference in the model of different Hall elements, so as to judge whether the electronics of the mahjong machine are rotating in the forward or reverse direction.

Zhongke Alpha's high-voltage bipolar latch Hall switch chip AH401F is manufactured using a high-voltage bipolar process. The chip consists of a voltage regulator unit, a Hall voltage generator, a differential amplifier circuit, a temperature compensation circuit, and an open collector output circuit. Working mode: input magnetic induction intensity, output is a digital voltage signal, the chip is resistant to high voltage shocks, has strong anti-noise capabilities; suitable for various consumer electronics, automotive and industrial control fields.

Hall switch chip AH401F performance parameters:

• Working voltage: 3.8V~60V;

•Overvoltage protection capability: 80V;

•ESD performance: ±4 kV;

• Open collector output

• Power pin reverse voltage protection

• Maximum driving current 30mA

• Operating temperature range: -40℃~150

• Two packaging options are available: TO92S and SOT23-3L