TLE4986C-XTS-M47

Programmable True Power On Sensor

EEPROM Description

Data Sheet

35

Revision 1.1, 2014-11-07

In pre-calibration sub-phase2 the IC performs corrections for all the individual teeth and a k-factor as set in KFACT

is used for computing the ODAC value. The duration of sub-phase 2 is given by a minimum of NTS+1 detected

maxima. During this sub-phase the ODAC is allowed for high updates in order to adapt from a KCAL regulation

target to a KFACT regulation target. While the IC calculates and updates the threshold based on found pairs of

min / max values, the internal offset update algorithm also checks the magnetic edge, which means that positive

ODAC updates are released only at magnetic falling edges and negative ODAC updates only on magnetic rising

edges (update rule).

After reaching the calibrated phase a calibration window lasts a number of detected maxima equal to the number

of teeth (NTS+1) and the individual (delta) threshold register update is performed individually for each maximum

accordingly. If the direction of the individual threshold update is constant within the last 4 decisions, considering

also the current one, than for the considered maximum the update is performed with 1 LSB in the corresponding