first time here. I've been working on developing a 3-port USB charging circuit coming out of a 120VAC wall outlet. Here is a basic schematic of what I'm following.
I've been having some trouble with finding a a transformer that allows enough amperage for my system (5V @ 2A through each USB) as well as understanding if all I need is a transformer and a rectifier or if I need some sort of controller chip. Here is a schematic of the TI chip I will be using for each USB port. I don't quite understand where the FB connects to at the converter.
Any feedback or advice is much appreciated!