TLE4925 Datasheet, PDF (18/25 Pages) Infineon Technologies AG – Differential Hall Sensor

PRELIMINARY
Pin 3 (Q)
S (N)
N (S)
B2
B1
Crankshaft Wheel Profile
Pin 1 (Vs)
Branded Side
Magnetic Field Difference
∆_B=B1-B2
∆B_ENOP=1mT
∆B_ENRP=-1mT
Large airgap
Small airgap
Hidden Hysteresis
∆B_HYS=2mT
Output Signal
VQ
Enabling point for releasing output: B1-B2>∆B_ENRP switches the output OFF (V_Q=HIGH)
Enabling point for operate point: B1-B2<∆B_ENOP switches the output ON (V_Q=LOW)
∆B_HYS=|∆B_ENOP-∆B_ENRP|
Outside of a permanent magnet the magnetic induction (=flux density)
points from north to the south pole. It is common to define positive flux
if the south pole of a magnet is on the branded side of the IC. This is equivalent to the
north pole of the magnet on the rear side of the IC.
Figure 14 System Operation with hidden hysteresis
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