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TDA7577BLVPD датащи(PDF) 18 Page - STMicroelectronics

номер детали TDA7577BLVPD
подробное описание детали  2 x 75 W dual-bridge power amplifier with I2C complete diagnostics and
PDF  43 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7577BLVPD датащи(HTML) 18 Page - STMicroelectronics

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Diagnostics functional description
TDA7577BLV
18/43
DocID025375 Rev 5
Figure 25. 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 26. 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 27. 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 28. Load detection thresholds - high gain setting



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