TDA7492MV View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7492MV

50 W mono BTL class-D audio amplifier

STMicroelectronics 

TDA7492MV

Applications information

6.6

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 26 and Figure 27 below.

Figure 26. Typical LC filter for a 8-Ω speaker

Figure 27. Typical LC filter for a 4-Ω speaker

6.7

Protection function

The TDA7492MV 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 5: Electrical specifications on

page 8 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.

Undervoltage protection (UVP)

If the supply voltage drops below the value for VUVP given in Table 5: Electrical

specifications on page 8 the undervoltage protection is activated which forces the outputs to

Doc ID 16264 Rev 1

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