Technical information

Easy Automotive Modules
Evaluation Kit EASYKIT AUX DRIVES (FS50R07W1E3_B11A)
Operating Modes and LED status
Application Note 19 AN2012-10
Evaluation Kit EASYKIT AUX DRIVES (FS50R07W1E3_B11A)
Figure 11 Overview of self test sequence with the four major test procedures.
The first part of the passive procedure checks the supply voltage of the uC and ADC. The ADC_1V95 signal
is connected to the uC supply status led, which has a quite stable voltage drop of 1.95V over wide supply
voltages. In case of drifts of the uC supply voltage, the ADC scaling of all sensors would not be correct. But
such a drift will be detected because in such cases the ADC_1V95 signal is also distorted and out of range.
After this test the test procedure waits for a DCL voltage higher than 20V. This is required because the later
switching tests makes no sense if the switch and phase voltages has always 0V Vce.