I need to redesign an old PFC for some higher input current and I have a problem with the space on my PCB. Now I use a ferrite core with a big air gap and 300mT maximum flux.
For the new choke, in order to have the desired inductance with the same core and bobbin size I will need a ferrite with 400mT capability. I saw that Feroxcube has a develop 3C92 material that can work at 400mT 100°C without a high drop in permeability value but unfortunately the are not so many core sizes available .Ideally I will like to find ETD34 size but a similar size with slightly diferitte shape will also fit in my board space. Did some one experimented other similar ferrite materials with high saturation flux density?