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Here is my circuit schematic below. PT4115 feeds LEDs. Load current is 200-215mA and switching frequency is 500kHZ. How do i calculate pi filter or what is the best values for pi filter in this design ?enter image description here

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    \$\begingroup\$ First explain why you need a pi filter and where it goes in the schematic. \$\endgroup\$ – Andy aka Sep 16 at 7:03
  • \$\begingroup\$ İ will put pi filter to input. Because this product gonna go EMC test. @Andy aka \$\endgroup\$ – ismail karakaş Sep 16 at 7:16
  • \$\begingroup\$ what is the best values for pi filter in this design There is no "best", a filter is always a compromise between complexity/price/performance. There are so many dependencies that en "exact" solution is usually impossible to find. What is often done is: see what other designs use, then do the same. Test EMC, if not OK then see how filter can be improved. \$\endgroup\$ – Bimpelrekkie Sep 16 at 7:23
  • \$\begingroup\$ Okey i will start like this. @Bimpelrekkie \$\endgroup\$ – ismail karakaş Sep 16 at 7:26
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    \$\begingroup\$ This is really useful thank you. @Sunnyskyguy EE75 \$\endgroup\$ – ismail karakaş Sep 16 at 17:13

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