TLE4921-3U Datasheet, PDF (12/19 Pages) Infineon Technologies AG – Dynamic Differential Hall Effect Sensor IC

TLE 4921-3U
Wheel Profile
N (S)
S (N)
1
4
B1 B2
Missing Tooth
Magnetic Field Difference
∆B = B2-B1
∆B_RP = 0.75 mT
∆B_OP = -0.75 mT
Small Airgap
Large Airgap
∆ B _HYS
Output Signal
V_Q
Operate point : B2 - B1 < ∆B_OP switches the output ON (V_Q = LOW)
Release point : B2 - B1 > ∆ B_RP switches the output OFF (V_Q = HIGH)
∆B_RP = ∆B_OP+ ∆B_HYS
The magnetic field is defined as positive if the south pole of
the magnet shows towards the rear side of the IC housing.
Figure 10 System Operation
Data Sheet
12
AED01697
2000-07-01