TDA7498MV(2011) データシートの表示（PDF） - STMicroelectronics

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TDA7498MV
(Rev.:2011)

100-watt mono BTL class-D audio amplifier

STMicroelectronics 

Applications information

TDA7498MV

5.6

Output low-pass filter

To avoid EMI problems, it may be necessary to use a low-pass filter before the speaker. The

cut-off frequency should be larger than 22 kHz and much lower than the output switching

frequency. It is necessary to choose the L and C component values depending on the

loudspeaker impedance. Some typical values, which give a cut-off frequency of 27 kHz, are

shown in Figure 23 and Figure 24 below.

Figure 23. Typical LC filter for a 8-Ω speaker

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Figure 24. Typical LC filter for a 6-Ω speaker

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22/27

Doc ID 16505 Rev 3

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