u/Best-Assistant-2932

Flyback converter - Secondary side shorted

Flyback converter - Secondary side shorted

The goal of this converter is to have a 24V input with a 5V output, 5A output to power a raspberry pi (I understand I can easily buy a buck-converter on Amazon, however I'm trying to make one of every basic DC-DC converter to make sure I've got the basics of power electronics down.

Luckily I didn't plug in the converter before checking for shorts. It seems the 5V output pin is shorted to output GND. Also, checking across the output caps - I found them to be shorted, so I removed the diode (D2) to see if it was a polarity issue. Now the caps are not shorted together, however the 5V output is still shorted to GND.

Now, I cannot seem to think of anything that could fix this, or maybe it could be a grounding issue from the output of the diode (D2) connecting to Cout_1?

Can anyone tell me what is wrong here?

https://preview.redd.it/sgf12roybl1h1.jpg?width=3024&format=pjpg&auto=webp&s=a5c6b45ecfbaf651ed9e1b785a538804f849acbe

https://preview.redd.it/4g9qf3uzbl1h1.png?width=1581&format=png&auto=webp&s=27c4d020341e5ef07ddbea5a63452868aa723851

https://preview.redd.it/ax6gknn0cl1h1.png?width=1182&format=png&auto=webp&s=c7e201ef3e81566d77336bf7b510778d019cd8b9

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u/Best-Assistant-2932 — 5 days ago