I've built a flyback regulator that can produce 100-400V from mains, but -- due to limited off-the-shelf transformer options -- I'm pretty sure I'm not using the best transformer for the job (unless I got super lucky).
So, I'm wondering what I'm sacrificing by not using the best transformer. I'd also like to know more about how to choose the right one. (TAoE doesn't say much about this, although I've used its other advice for mains powered power supplies.)
A few more details:
I'm using this transformer because it has a 1:1 turn ratio (all the others I've found have more turns on the secondary), it's designed for 100kHz, and it can handle more current than the regulator.
I'm using this for the regulator. It only uses an optocoupler for feedback. A comparator drives the LED in the optocoupler by comparing the output of the converter (lowered via a voltage divider) to the output of a DAC. That allows me to set the output voltage in the range I mentioned.
I have a schematic, but it's really ugly. I can post it if it'd be useful.
Again, the regulator does work, but I'm wondering what I'm missing by using this transformer (limited output power? risk of spontaneous combustion?), and I'm looking for a general source for design information for flyback converters.