I considering TPS23731 with diode rectification and primary-side regulation, referenced by answered below E2E thread.
About Vout setting, normally calculated results become a few gap.
I guess these reason is body diode (~0.7 V) could influence the feedback loop by above thread.
Please let me confirm about Vout setting, is below equation method correct?
Based on above schematic (Name for VFCP changed to VCP on this condition),
・Va setting is;
・In this case when VCP (=VFCP on datasheet) determine 0.7V, AUX voltage: Vx is equation (3);
・VFB will be regulated by VREFC (=1.75V), VREFC is equation (4);
・Vout equation is below by equation (1)~(4), is these method of calculation (how to use VCP) correct?