Ehab Abdalla
Newbie level 6
I'm trying to drive MOSFET (IRF644) as a high side switch,input voltage is 220 Vdc and the frequency ranges from 0HZ to 100HZ and I don't want to use any IC like ir2112 or ir2110 just need to control the MOSFET with transistors,capacitors and resistors.
I have found a circuit which I tried practically and worked for 48 Vdc but when I changed the input to 220 Vdc everything went wrong , so I need help if anyone has other schematics or help in modifying the attached circuit to work with 220 Vdc
![Grbniiii XD.JPG Grbniiii XD.JPG](https://www.edaboard.com/data/attachments/27/27220-1a6fb21a8e90d2083be8f7b73753e5d6.jpg)
I have found a circuit which I tried practically and worked for 48 Vdc but when I changed the input to 220 Vdc everything went wrong , so I need help if anyone has other schematics or help in modifying the attached circuit to work with 220 Vdc
![Grbniiii XD.JPG Grbniiii XD.JPG](https://www.edaboard.com/data/attachments/27/27220-1a6fb21a8e90d2083be8f7b73753e5d6.jpg)