tda7498l STMicroelectronics, tda7498l Datasheet - Page 22

• Manufacturer Part Number: tda7498l
• Description: 80 W + 80 W Dual Btl Class-d Audio Amplifier
• Manufacturer: STMicroelectronics

Applications information
5.6
5.7
22/27
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
loud-speaker impedance. Some typical values, which give a cut-off frequency of 27 kHz, are
shown in
Figure 25. Typical LC filter for a 8-Ω speaker
Figure 26. Typical LC filter for a 6-Ω speaker
Protection function
The TDA7498L is fully protected against overvoltages, undervoltages, overcurrents and
thermal overloads as explained here.
Overvoltage protection (OVP)
If the supply voltage exceeds the value for V
page 9
high-impedance state. When the supply voltage falls back to within the operating range the
device restarts.
the overvoltage protection is activated which forces the outputs to the
Figure 25
and
Figure 26
Doc ID 16504 Rev 1
below.
OVP
given in
Table 6: Electrical specifications on
TDA7498L