2 ms·

All desktop and server power supplies use active PFC at this point, because the cost of the much bulkier passive components is now higher than the cost of the a

All desktop and server power supplies use active PFC at this point, because the cost of the much bulkier passive components is now higher than the cost of the active ones. EDIT: apparently not quite, I went on Newegg and the non-80plus power supplies still have passive PFC.

vonmoltke 10y ago
Sure, simpler active PFC components are pretty cheap now. There isn't much to a valley-fill circuit, though. That should get you below the legal limit on harmonic distortion in most cases. I know it is still the standard PFC in lower-power fluorescent light ballasts.