For better understanding you can download this PDF:- www.nxp.com/documents/user_manual/UM10522.pdf
This circuit uses a TEA1721 ic to convert AC Mains voltage to DC voltage. This design claims to have a 77% efficiency without a transformer and is non-isolated, both of which are fine by me.
The output of this converter is 12V 200mA and I desire 5V 450mA (or greater amperage). Please suggest any changes that I can make in this circuit to get a 5V 450mA output.
If there is a better circuit (without any transformer) which has a better efficiency and an output of 5V 500mA (or greater amperage), then please do suggest me that as well.