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TDA7720B Datasheet(PDF) 24 Page - STMicroelectronics

Part # TDA7720B
Description  3 band car audio processor
PDF  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7720B Datasheet(HTML) 24 Page - STMicroelectronics

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Description of audioprocessor
TDA7720B
24/42
DocID024331 Rev 2
A low-active DC-offset error signal appears at the DCErr output if the next conditions are
both true:
a)
Front and rear outputs are inside zero crossing windows.
b)
The input voltage Vwinin is logic low whenever at least one output of the power
amplifier is outside the zero crossing windows.
After power-on, the external attached capacitor is rapidly charged (fast-charge) to overcome
a false indication.
Figure 18. DC offset detection circuit (simplified)
4.13
Output stage
The output gain and output DC voltage is configurable by I2C to fit different application. The
configuration is as following:
AC Gain = 5 dB, DC level = 4 V
AC Gain = 8 dB, DC level = 5.75 V



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