hello silvio and stewin, i will go with ir2153, easy, cheap, and has and option there is many way to limit the current a.k.a OCP with ir2153.
NCP1635 is not the best choise chip for PFC, but you could experiment with it.
Cores from https://www.mag-inc.com/ will do the job perfectly, look for the suitable core for your application.
You may also view here my latest PFC experiments.
Hope that helps
@ silvio what core may i use and how many turns should i turn? i have lots of iron powder cores t130-10(black core) t130-26(white yellow core) and t130-52(blue green core)
which of the above should i use and how many turns should i turn?
Regarding the core used this is based on firstly the power to deliver. This has to be large enough so that it can handle the power that it has to deliver without saturation. To my believe a sandust core is suitable for this purpose. Microsim can also recommend the type of core to be used in pfc as he had already experimented with it.
I Have an XL file using the NCP1653 PFC chip to work out the pfc circuit according to your need but I cannot upload it here as it is saying that the file is not valid. You can send me your mail address and I will post it to you.
PFC should be set at 380VDC as minimum as going lower than that requires redesign of the loop.
And the most important thing to remember is to test at 100VAC as this is the point that shows if your PFC is working or not.
Also, the point when you go from no load to full load is very critical as it will confirm your entire design success.
Hope that helps