OTOH, the charger should be phase factor corrected, which implies a similarly sized inductor for a boost converter. If the output current doesn't need to be constant, but abs(sin(t)) is sufficient, the PFC could be integrated with the flyback stage.
Bumping up the switching frequency from 100kHz to 1MHz, replacing the switch with a SiC device and selecting a multiphase flyback topology might in fact work with a low-loss ferrite "transformer" on, say, 3C95.
Best regards, Piotr
lists a bunch of higher frequency ferrites. 3C95 is listed as good to about 0.5MHz. 3F4 gets up to about 2MHz.
3C95/N95 is a super low loss ferrite, which is good for a wide B swing topology like the flyback. I would design this power stage around the FoM of the ferrite, whatever the switching frequency might turn out to be.
Best regards, Piotr
You may be right. I'll keep you informed.
Hul
Sergey Kubushyn wrote:
Thanks for the links, Bill. Mouser would be a handy avenue of supply.
Hul
Bill Sloman wrote:
Piotr - "super low loss" does catch the eye at present. I'll take a look in hopes a toroid of that mix would fit, numbers wise.
Hul
Piotr Wyderski wrote:
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