Welcome to the club......I've never had a switching supply work exactly as initially conceived. It always took several iterations.
I did not spend much time going thru the datasheet because this device looks like it's meant for pulsed, rather than continuous, operation. That could have a large impact on how it behaves. First, you will need some scope pictures to get a good idea what's happening in the circuit. -- 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 [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/cb7f161b-96f4-41ff-9c8b-bf9c79115d98%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
