What exactly are they doing again ? Something with power triangles and getting the most resistive power output at any moment ? And mains is at 60Hz and PFC controllers switch at what frequencies >>10kHz ? Is it fixed or not? 60Hz is fixed
Does the PFC voltage vary from rectified mains to 2x or is it more or less fixed ? Maybe that's voltage mode and current mode fixes a current ?
How do they differ from the following stage that usually switches a flyback transformer ? (They are just a boost converter ?)
I know complex numbers no problem, but idk many eq's for elec's of this stuff
Why are they typically rated at +2x mains Vpeak, like +350V, when the intended overall output is only 5-12V ? What is the reason use a boost converter to 2x the voltage rather than say 1st use a buck converter and use 1/2 the voltage?
Fire away thanks