hi to all, I have designed a power supply of 3.5v,0.15A and ISO 5v,0.05A specification with input supply of 85-265 AC.During testing of output voltages and current it shows -->
1) output voltage @3.5v with load resistance of 22ohm,it gives Vo=3.4v and Io=140mA
2)Output voltage @5v with load resistance of 100ohm,it gives Vo=2.5v and Io=30mA where there is 'No any load connected @3.5v'
3)output voltage @5v with load resistance of 100ohm,it gives Vo=5v and Io=50mA where there is 'load connected @3.5v'
My question is that how does load resistance affects (which connected to3.5v) to 5v supply during testing of supply? Please find the attachment of power supply design.