TDA7491MV View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7491MV' PDF : 28 Pages View PDF
Application information
TDA7491MV
7.6
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 cut-off frequency of 27 kHz, are
shown in Figure 24 and Figure 25 below.
Figure 24. Typical LC filter for a 8 speaker
Figure 25. Typical LC filter for a 4 speaker
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DocID14576 Rev 4
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