TLE4955C datasheet(7/21 Pages) INFINEON

tên linh kiện	TLE4955C

Giải thích chi tiết về linh kiện	Differential Hall Effect Transmission Speed Sensors

PDF	21 Pages

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nhà sản xuất	INFINEON [Infineon Technologies AG]

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Data Sheet

Version1.0

2016-06-15

TLE4955C

Confidential

Operating Modes and States

Figure 4

Example for Startup Behavior and Transition from Uncalibrated into Calibrated Mode

2.2

Adaptive Hysteresis

The adaptive hysteresis is linked to the input signal. Therefore, the system is able to suppress switching if

vibration or noise signals are smaller than the adaptive hysteresis levels. The typical value for the hysteresis

level is 1/8 of the magnetic input signal amplitude, the minimum hysteresis level is ΔBspeed-limit (amplitude).

The visible hysteresis keeps the excellent performance in large pitch transmission application wheels .

Figure 5

Adaptive Hysteresis

∆Bspeed

DNC=(min1+ max1)/2

max1

min1

min2

DNC=( min2+max1)/2

Phase shift change

uncalibrated mode

vs . calibrated mode

Uncalibrated Speed Signal

with negative offset

Uncalibrated Speed Signal

with positive offset

Calibrated Speed Signal

Hysteresis high level

Hysteresis low level

Vibration Suppression

via Hysteresis

Vibration Suppression

via Direction Detection

DNC:

2xdBspeed-limit

ILow

IHigh

IDD

Input signal

Adaptive hysteresis

∆Bspeed

Hysteresis high level

Hysteresis low level

Input signal

Adaptive hysteresis

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