As I said in title block idea is simple,but just the idea.Currently I am working with TINY switch and also there r TOP switch topologies which r amazing.The thing is to make it even smaller and with less parts count number.This should not be a topic for a begginers.So if u really see that u can help with what u know then write it here.My idea is to start with TINY290 IC ..... and only to make an improvement for higher output power fg. up to 2-3KW.Here is the PDF with schematic and all data for transformer.Goal is no heat on full load.