Diagnostics functional description
TDA75610SEP
Figure 23. SVR and output pin behavior (Case 2: with turn-on diagnostic)
The information related to the outputs status is read and memorized at the end of the
current pulse plateau. The acquisition time is 100 ms (typ.). No audible noise is generated in
the process. As for SHORT TO GND / Vs the fault-detection thresholds remain unchanged
from 26 dB to 16 dB gain setting. They are as follows:
Figure 24. Short circuit detection thresholds
Concerning SHORT ACROSS THE SPEAKER / OPEN SPEAKER, the threshold varies
from 26 dB to 16 dB gain setting, since different loads are expected (either normal speaker's
impedance or high impedance). The values in case of 26 dB gain are as follows:
Figure 25. Load detection thresholds - high gain setting
If the Line-Driver mode (Gv= 16 dB and Line Driver Mode diagnostic = 1) is selected, the
same thresholds will change as follows:
Figure 26. Load detection threshold - low gain setting
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