The switch type Hall sensor chip controls the output to conduct or turn off by detecting the strength of the magnetic field, playing a switching role.Classified by polarity, it can be further divided into unipolar, bipolar latch, and bipolar types.

The principle of a unipolar Hall IC is that it only responds to a single magnetic pole. Most unipolar Hall ICs conduct when the S-pole faces the marking surface and the applied magnetic induction intensity B exceeds the operating point, causing the output to change from high to low.

Unipolar Hall IC applications: non-contact switches, automotive igniters, braking circuits, position and speed detection and control, safety alarm devices, textile control systems.

The principle of bipolar latch type Hall IC: The S pole and N pole alternately act on the Hall IC. When the magnetic induction intensity applied by the S pole towards the marking surface exceeds the working point, the output conducts and changes from high to low. When the magnetic induction intensity weakens until it is removed, the output remains conductive. When the N-pole faces the marking surface and the applied magnetic induction intensity exceeds the release point, the output turns off.

Latch type Hall IC applications: brushless DC motors and DC cooling fans.

The principle of full pole Hall IC is to treat the S pole and N pole equally. If any magnetic pole faces the marking surface and the applied magnetic induction intensity B exceeds the working point, the output conducts and changes from high to low. When the magnetic induction intensity weakens below the release point or is removed, the output turns off and the output changes from low to high. There are also some all pole Hall ICs with opposite output states as mentioned above.

Full pole Hall IC applications: Battery powered devices such as smartwatches, mobile phones, water meters, laptops, digital cameras, music players, and gaming consoles.

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