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battery charger pfc (is LLC necessary?)

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ivenzar

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Hello
I have seen many electrical vehicle battery chargers that employs a boost PFC and then a llc topology. Why batteries are not chargued directly by the regulated pfc stage without the LLC?

Thanks
 

usually because the PFC is often not isolated

- - - Updated - - -

Also the PFC cant charge batteries of voltage below the mains peak (~330v)
 

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