Capacitor between High and low voltage sections

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berni80

Joined: 28 Jun 2008
Posts: 46

23 Oct 2009 7:27 Capacitor between High and low voltage sections

Hi,

In an isolated DC/DC that converts high voltage (ie 300V) to low voltage (ie 12V),
is often present a capacitor between High and low voltage sections.

Have you noticed it?
Which is its function?

Thanks

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FvM

Joined: 22 Jan 2008
Posts: 5162
Helped: 767
Location: Bochum, Germany

23 Oct 2009 8:31 Capacitor between High and low voltage sections

In most cases, it's necessary to keep the common mode switching noise generated by the converter within acceptable limits.


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