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AN4569 Fiches technique(PDF) 16 Page - STMicroelectronics

No de pièce AN4569
Description  The purpose of the document is to show different possibilities
PDF  29 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4569 Fiches technique(HTML) 16 Page - STMicroelectronics

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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.



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