enter image description hereim making CDI circuit in which capacitor charges upto 300v and then discharge through the IGBT connected . but when i ground the capacitor the output voltage ground as well which is obvious. to compensate the voltage drop across the output, SG3525 increase pulse width which further make the situation more critical, excessive load on the mosfet and transformer and could damage the input power supply this is why i dont want to use feedback . i just need and adjustable duty cycle or fixed manually so i can reduce the power loss.(feedback circuit in the image is simple representation!!)enter image description here

  • \$\begingroup\$ Can you include LC values with pulse width, f? \$\endgroup\$ Feb 7, 2021 at 17:19
  • \$\begingroup\$ Full schematic would help and quite possibly be needed. \$\endgroup\$
    – Andy aka
    Feb 7, 2021 at 17:27
  • \$\begingroup\$ im not sure about any LC value for Pulse width. \$\endgroup\$ Feb 7, 2021 at 18:48
  • \$\begingroup\$ circuitry image is added \$\endgroup\$ Feb 7, 2021 at 18:53
  • \$\begingroup\$ The symbol you have used for the 25N120 is the symbol for a MOSFET, not an IGBT. \$\endgroup\$ Feb 7, 2021 at 19:08


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