VIPER011XS BUCK topology

[APC.1]

Could someone explain why POWER EARTH and GND (PIN 1) are tied togheter?

This not make sense for me.

[Peter BENSCH]

Welcome, @APC.1​, to the community!

You got confused by the symbols:

• the three dashes of different lengths indicate power earth
• the small white triangle is an internal connection of the schematic that must not be connected to ground

This representation was chosen because the VIPer011 is actually a flyback converter whose GND pin is not connected to GND in this buck converter, but realizes the output.

Does it answer your question?

Regards

/Peter

[APC.1]

We need to conect +VOUT 25.8VCC and power earth instead GND?

[Peter BENSCH]

The best way to show this is with a drawing:

Regards

/Peter

[APC.1]

Great!! exactily what I did.

[Peter BENSCH]

Excellent!

If the problem is resolved, please mark this topic as answered by selecting Select as best under your preferred answer. This will help other users find that answer faster.

/Peter