Thanks for suggestions. The smaller one looks like like it should do the job with correctly designed converter - the one I found doesn't look like it can dissipate more than 100mW without damage. Same story for me and CJ5143 - I've received two of those as free samples. My converter with CJ5143 wasn't a success and I don't know why yet. PCB came out really small (22mm x 15,5mm), the transformer is used as a coupled inductor, the driver is MCP1632. After loading it with 2mA, the output dropped by 10V and efficiency was under 40%. I guess I need to learn more. Now I can only suspect that 300kHz is probably too high for a transformer with probably significant parasitic capacitances in it. I'm stil more a "trial and error" engineer.
Meanwhile, I came to realisation that LLC converter would be a good choice only if I made a custom transformer - it is much more winding ratio dependent than regular flyback/coupled inductor converter. W dniu niedziela, 18 marca 2018 09:36:37 UTC+1 użytkownik Paul Andrews napisał: > > Hi Tomasz, > > I used this transformer from Wurth in one version of my power supply: > http://katalog.we-online.com/pbs/datasheet/74488540250.pdf. It is 4mm > high. That version of the power supply will easily drive two tubes from a > LiPo battery. It will manage up to four IN-12. > > The whole project is documented here: > https://hackaday.io/project/27899-nixie-tube-power-supply > > The transformer I have settled on for my own purposes is this one: > http://katalog.we-online.com/pbs/datasheet/749196141.pdf because it has > more headroom than the other one. Of course, it is also physically bigger. > > -- 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/972db543-47f3-453e-bbbf-7b061562b57f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
