That's an interesting answer.
I have a different guess but I'm not sure this is the correct answer to my initial question.
1) In flyback power supplies, the secondary's ground is connected to the primary ground through an Y1 capacitor which withstands 4000 VAC.
The typical value of this...
Hi,
I have to design an isolated flyback power supply of 22 W.
At the moment I'm testing the performances of my competitor's power supply.
I noticed that on this power supply there is a Zinc Disc Varistor (56 Volt) between EARTH and the GROUND of the secondary.
This is quite surprinsig for...
