TNY268G
Posted by: Willi
on
I have built up a power supply, but if I connect it to 230VAC, the Pin5 will be destroyed. I’m not sure is there an error in the schematic, or is it a mounting error.
Files
| Attachment | Size |
|---|---|
| power_supply.JPG | 58.01 KB |
| transformer.pdf | 120.29 KB |
Comments
Hello PI-Trucker thanks for your comments.
I have added the Transformer.PDF
This transformer is not designed correctly for the schematic in the JPG file "power_suppy.JPG" that you attached. The turns ratios for one thing, appear to be all wrong.
Please download PI Expert and use that to design a transformer to your specifications.
Sorry I forgot to change the output values in the schematic.
I would like generate 5 and 3.3VDC and not 12 and 3.3VDC.
Can you show the transformer specifications?
Did you try examining the Drain waveform at 90Vac?
Most common cause of Drain failure is excessive voltage (>700V).