TLE4927C Datasheet, PDF (3/5 Pages) Infineon Technologies AG – Dynamic Differential Hall Effect Sensor

TLE4927C supplement
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
∆B_ENRP
Small airgap
Large airgap
Hidden Adaptive
Hysteresis
Output Signal
V_Q
Enabling point for releasing output: B1-B2<∆B_ENRP. Next zero crossing switches the
output OFF (V_Q=HIGH).
Enabling point for operate point: B1-B2>∆B_ENOP. Next zero crossing 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 1 System operation with hidden adaptive hysteresis
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