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Hello guys, i am using UCC28070 to make a interleaved PFC circuit for my own project. TI makes a reference design itself, 300w. It has some problems here, i can not understand it. 
After secondary winding, they use "Reset network", and they suggest reset network 
like this. Can someone who has experience about this problem, tell me why we need "reset network" ?And with 3 suggests like that, how it can be reset?
Link to UCC28070 : http://www.ti.com/lit/ds/symlink/ucc28070.pdf
After secondary winding, they use "Reset network", and they suggest reset network like this. Can someone who has experience about this problem, tell me why we need "reset network" ?And with 3 suggests like that, how it can be reset?Link to UCC28070 : http://www.ti.com/lit/ds/symlink/ucc28070.pdf
