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Hi. I have built this SMPS that is designed by Yamaha with exact same components except for the IGBTs. At first I have tried to use IFRP450 but after 5 seconds of operation IR2153 burnt out. So I replaced them with IRF740 and this time my SMPS worked properly. Since I had a pair of 2SK4106 I...

I have built this power supply but I can't figure out the correct number of turns for the transformer. here is the PDF schematic: This SMPS is based on UC3842 controller and is supposed to work with 220V and the output voltage is 13.8 Volts at 8 Amps. This is my first Flyback and it is...

Hello there, I have built a 50khz sg3525/IR2110 based half bridge SMPS which works, but not properly. I am a absolute noob with SMPS. So that is why i'm asking these basic questions. The ETD59 core makes a loud high frequency noise with or without load connected. So far I know that my winding...

Hello everyone, I made a 50Khz SMPS using the schematic I have attached to my message. I built it using the exact same parts written in the schematic. The only difference is that I adjusted the circuit for +36/-36 volts. So, I used a 36v zener and as for turns ratio, (Primary 26 turns of 1.7mm...