TLE4953 Datasheet, PDF (15/20 Pages) Infineon Technologies AG – Differential Two-Wire Hall Effect Sensor IC

TLE4953
TLE4953C
If the magnetic direction field exceeds ∆B_Dir, the output pulse lengths are 60 µs or 120 µs
respectively, depending on the direction of rotation.
If the magnitude of the magnetic direction field is below ∆B_dir, the output pulses are
suppressed when the frequency is below f_DR,max (see section vibration suppression). For
magnitudes of the magnetic differential field below ∆B_Limit the signal is lost.
Speed pulse occur only at the first pulse after start up or above f_{DR, max}.
If no magnetic differential signal change is detected the IC will remain in calibrated mode.
No internal reset are generated - therefore a zero speed operation is possible.
Internal
Sensor
Speed Signal
Transferred
Signal:
S
Xn
Transferred
Signal:
DR-L
Transferred
Signal:
DR-R
t_pre-low= 30 µs
t_S = 30 µs
Xn+1
t_DR-L= 2 x t_S
t_DR-R= 4 x t_S
Figure 6 Definition of PWM Current Interface
Xn+2
AET03196
Data Sheet
12
V 4.0, 2010-04