With such a high boost-ratio, the other alternative is a flyback converter, which is almost identical except there is a secondary winding that goes to the high-voltage side.
Basically to get more voltage out of a boost-converter, you need more current. There are only 2 ways to do that if you've maxxed-out your duty-cycle: 1. Increase the supply voltage (which is not an option) 2. *Reduce* the inductance in order to increase the current. By paralleling the inductors, you went with option 2. By doing so, you cut the peak-current in half, which keeps you away from saturation, and it also reduces the RMS current, which reduces heating losses. Glad to see you got it working! -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/7808223a-47c2-4812-aa45-b6776763faf0%40googlegroups.com.