Hello. I'm trying to build a boost converter for my project to boost 12V to 150-220V. I'm looking at various converter circuits online, like this one: http://desmith.net/NMdS/Electronics/NixiePSU.html, and they use inductors on the order of 100uH to 150uH, and use drivers that switch at something like 300KHz. But when I look at the wikipedia equation for discontinuous mode output voltage, it's this:
Vo = Vi * (1+Vi * D^2 * T)/(2*L*Io) If I plug in Vi = 12V, D = 0.92, T = 1/300000, L = 0.0001, and Io = 0.025, I get something like 93V, which is far from what I want to be at. So I'm curious about what I'm doing wrong here. Also, from what I've read so far, it seems like it's bad to switch between continuous and discontinuous modes due to stability? Since my digits would turn on and off, my current draw can swing wildly, so I can't really guarantee that I would stay in one mode right? Do modern controller ICs just handle this without us having to worry about it? Also just an extra tag along question. I see some nixies use anode resistors when they already have cathode resistors. What is the point of the anode resistor? Wouldn't the cathode resistor already limit the current? I'm looking at the SP-101 Panaplex datasheet and they have a 2.2k anode resistor. Wouldn't this affect the brightness depending on how many segments are turned on? Thanks in advance. -- 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/76c7037f-9d54-48bb-b3e0-aed5bd4b49f9%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
