Hello,
I use an UC3854 for PFC applications .
Input mains 115Vac 400Hz ,Output 200V 580VA.
I note that the THD current increase from about 4% at about 6% after 10 min of running,if if freeze the UC 3854 ,the THD decrease to 4% ,and after a few minutes return to 6%.
What internal parameter was modified when temperature on UC3854 increase?
Have somebody remark something about this behavior ?
Thanks.
Best Regards.