That's how most universal input switchers work - either double the incoming AC (110V in) or rectify it (240V in) to give 300V and then use that to make the lower voltages. You need to convert the incoming AC to DC, and can't use a 50 or 60Hz transformer, so that's the easiest way. It's just that all of this normally lives in one box. Vicor split it since they do mix-and-match, and to let one front end serve multiple step-down modules. /mike
--- In [email protected], DCFluX <dcf...@...> wrote: > > The goofiness I was refuring to comes from the steping up to 300V from > mains voltage. Seems pointless if your end goal is 15V and when you > can do it in 1 module instead of 2. Unless you are trying to derive > plate voltage for a tube.... >
