TDA7498MV 데이터 시트보기 (PDF) - Unspecified
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TDA7498MV Datasheet PDF : 26 Pages
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Application 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 cutoff 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 cutoff frequency of 27
kHz, are shown in Figure 23: "Typical LC filter for an 8 Ω speaker" and Figure 24: "Typical
LC filter for a 6 Ω speaker" below.
Figure 23: Typical LC filter for an 8 Ω speaker
Figure 24: Typical LC filter for a 6 Ω speaker
5.7
Protection functions
The TDA7498MV is fully protected against overvoltages, undervoltages, overcurrents and
thermal overloads as explained here.
Overvoltage protection (OVP)
If the supply voltage exceeds the value for VOVP given in Table 6: "Electrical specifications
", the overvoltage protection is activated which forces the outputs to the high impedance
state. When the supply voltage falls back to within the operating range, the device restarts.
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DocID016505 Rev 6
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