TLE9180D Current measurement problems

Hi there!

I have a TLE9180D 3 phase bridge driver in communication with an Aurix TC234. I followed the power-up sequence of the bridge driver, and everything seems to be fine.
All the error flags are 0, and the PWM signal applied on the digital inputs are shown at the output level. The operation Mode is "normal" (Om_over == 0x80).

I have a VADC sample at the 10kHz PWM signal edge. The gain of the current sense amplifiers is 30.81, the VRO voltage level is 2.5V. When no current flows, I see the expected values, and I can measure
the expected 2.5V at the VOx outputs.

Here comes the non-sense:

When I apply a differential voltage at the shunt terminal, and there is current on that resistor (with switching power supply in current limiting mode), I cannot see any changes in the output voltage.
Does not matter, how many amps are flowing through the shunt resistor, the amplifier output is at 2.5 Volts, which is the zero current voltage.

All the current sense amplifiers are enabled, and there is no break on the hardware.

The output of the differential amplifiers are zero bacause of an unknown reason.


Thank you for the answer!