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330Vatt on UCC28810 PFC

Other Parts Discussed in Thread: UCC28810

Hello
I apologize for my English.
I started to develop PFC UCC28810. calculated the scheme. collected fee. wound inductor. load is connected and turned on. 15 minutes inductance warmed to 80C. counting and perenamatyval inductance many times. still goes to 80C heat for 15 minutes. what could be wrong?

inductance parameters:
ETD-34 frame
core N87
inductor 210uH
clearance of 1.3 mm
number of turns 41
number of cores conductor 6
section of one wire strands of 0.4 mm