Can you post a schematic ? I'm a bit concerned about the 250V-rated MOSFET, when you mentioned ~300V was measured. Is the MOSFET exposed to this voltage, or is there a doubler/tripler ?
My first guess is the supply is *under*-loaded, because the feedback mechanism is basically doing it job. Secondly, I do wonder about the bandwidth of the feedback circuit. It's very possible the feedback pin is lagging the HV output. Can you measure the HV and FB waveforms on a scope ? Ideally you will want little or no lag (which is the case for a purely resistive divider); any filtering into the FB pin with a capacitor will introduce some lag as it creates an RC 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/65b3a748-0112-46a2-a04c-262da9e7ba97%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
