Need help to understand inductor based non-isolated offline buck converter
After searching a Lot I found it :) thanks for every one who helped.
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Note:
THE CIRCUIT IS LETHALLY DANGEROUS at all times.
The output is not isolated from AC mains and ALL parts of the circuit should be regarded as being at mains potential at all times.
These devices are only suitable for applications where ALL parts of the circuit and anything powered by it is provided with mains grade insulation and isolation.
IF L &amp; N inputs are swapped (as happens) then Output GND will be hard connected to Live and Vout will be at mains live less a few volts DC.