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TDA7492 Datasheet(PDF) 26 Page - STMicroelectronics

Part # TDA7492
Description  50 W 50 W dual BTL class-D amplifier
PDF  32 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7492 Datasheet(HTML) 26 Page - STMicroelectronics

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TDA7492
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DocID014926 Rev 6
6.5
Output low-pass filter
To avoid EMI problems, it may be necessary to use a low-pass filter before the speaker. The
cutoff frequency should be larger than 22 kHz and much lower than the output switching
frequency. It is necessary to choose the L-C component values depending on the loud
speaker impedance. Some typical values, which give a cutoff frequency of 27 kHz, are
shown in Figure 33 and Figure 34 below.
Figure 33. Typical LC filter for a 8-
 speaker
Figure 34. Typical LC filter for a 4-
 speaker



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