Hi,
We are bidding for SMPS "take to production" job. However, i think we may be getting taken for a ride, possibly to test us out...VAC = 115VAC and 60Hz. Load = 500W.
The UCC2818 based PFC is set up for 200kHz = switching frequency.
Load = 500W at output of the downstream full bridge.
Boost Diode is FES16GT-E3, a 50ns UF diode.
The output cap is FIVE axial 470uF Tantalums in series (94uH) !!!
The sim i have done confirms output ripple voltage of 73Vpkpk !!!!
The above 94uH is the only PFC output bus cap that i can see. Even though it gets switched by the 500W full bridge, and the aux Flyback.
Is this Candid Camera?....or Beadles's About?....we put it thru to prod...then someone jumps out and tells the world what naff engineers we are.
BTW, front end is fuse, then SMCJ180CA TVS (!!!)...and the 115VAC can go up to 173VAC for 2 seconds (240Vpk).
Max mains transient is said to be 1kV.
Its for "Airborne" use.