I think your doing something wrong. I use the RLB9012-101KL routinely, and get twice the output current (~35mA @ 180V), while the coil gets warm, but still within reason. I'd suggest that you increase your switching frequency. I suspect you're well into saturation.
On Tuesday, November 6, 2018 at 12:12:29 AM UTC-8, Oyvind wrote: > > Hi, > > I have been experimenting a bit with single inductor supplies. I built one > myself based on TPS40210, and tried a couple of others too. > > Common for all, is that the inductor gets quite hot when running them on a > 10K dummy load @180V. > > So, for 6 IN-14 tubes on 1.5 mA each, they work just fine, but not much > more than that. > > I tried various inductors, with fairly high amp ratings: > > > - shielded SMD ones have most pronounced. That is, I can hold my finger on > it, but just barely. > - radial THT, souch as Bourns RLB9012-101KL. When peeling off the outer > coating, the heat is obvious > - toroids with low ohms / high amps. These gives best result, but gets > "luke warm". > > I'm thinking that having a supply like that inside a casing would not be > good in the long run. I am aiming for non-multiplexed.. > > Not sure how to remedy this (snubber or similar ?), perhaps this topology > isn't the most ideal. > > > What's your experiences here ? > > -- 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 post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/a0bf8c9f-58d7-4bad-a783-686b50bb312c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
