4.2.7
Tools drop down menu
4.2.7.1
OCD Calculation Tool
This menu item opens the OCD Calculation Tool window. It allows to setup the OCD thresholds for OCD1
and OCD2 pins, if the Current Rail Transfer Factor is known. The latter can be estimated using the software
functionality explained in
, further information are available on the User manual [2].
Figure 23
OCD Calculation Tool window
This window is made by the following visual elements:
1.
Select Sensor dropdown menu: select the sensor for which the calculation of the OCD thresholds should
be done;
2.
Select Package: select the package version of the selected sensor;
3.
Current Rail Transfer Factor: enter the nominal current rail transfer factor for the selected sensor;
4.
Calculate Threshold pane: this section allows to calculate the resulting threshold in ampere, given the
OCD threshold code programmed in the corresponding internal EEPROM register of the selected sensor.
The OCD threshold code can be easily programmed using the Basic Configuration window (
5.
Calculate Register value: this section allows to calculate the OCD threshold code which provides the
closest OCD threshold value to the desired OCD threshold value in ampere.
4.2.7.2
Current Rail Transfer Factor
This menu item opens the Transfer Factor Calculation Tool. This tool allows the user to estimate the transfer
factor with typically an accuracy of ± 5 %.
TLE4972 Current sensor programmer
User guide
4 System and functional description
User guide
28
Rev. 1.00
2022-04-05
