what are the most important specs of PFC pre-regulator?

simbaliya said:

I'm asked to do a benchmark graph for PFC products from different companies, therefore the first thing I need to do is to collect the most important specs data for these products. But there is a question, which is that I'm not sure which are the most important spects? Power factor? Power efficiency? If so where can I get these data, since I already read some datasheet for some products, none of them gave any numbers of PF or power efficieny.

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mtwieg said:

Nominal output power
PF at light and max load
Efficiency vs load
Size or power density (power per volume)
If some documentation doesn't at least spec the first three of those, then it's poor documentation and probably a poor product.

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