2.1-channel applications using two devices

AN4569

16/29

DocID026803 Rev 1

3.1.3

Output filter

Figure 14 shows the output filter scheme for a 2.1-channel application.

Figure 14. Schematics for output filter

The output filter is composed of three different sections:



Snubber network



Main filter



EMI filter

3.1.4

Snubber network

Figure 15. Schematics for snubber section

The function of a snubber network is to absorb energy from reactance in the power circuit.

The purpose of the RC snubber is in order to avoid unnecessary high pulse energy such as

spike in power circuit which is dangerous to the system. By using the snubber network, the

energy (big spike) is transferred within the snubber network, allowing safe operation of the

system.