Where do you find stock transformers for switching power supply design? Apparently, for most commercial work, the transformer is at least semi-custom. And no, I don't want to wind my own. I can model what I want in LTSpice, but the transformer I've defined is not a standard part.
Digi-Key, surprisingly, isn't that helpful. Even the Pulse Engineering site doesn't seem to help much.
What I'm looking for is a transformer with about 10uH on the primary, and 140uH on the secondary. Nothing in the Digi-Key catalog seems to have a turns ratio of more than 3:1, and I need more like 4:1. (I'm designing a boost converter to boost 12V up to 120VDC at 6mA or so, using an LT-3484 family IC, which is a camera flash capacitor charger. This is part of my ongoing effort to drive antique teletypes with modern electronics instead of boat-anchor power supplies.)
This is a little board-mount part, not a big power transformer, probably about 1cc in volume. Sources?
John Nagle