I am in big trouble with my power supply for Nixie tubes (IN 9 bargraph.)
I need 140V -160V (150V prefered) output voltage and 10x 12mA --> ~140mA current. (~ 21W).
- I tried to design boost converters but I wasn't able to get one with this amount of power. Does anyone have a schematic with such a boost converter?
I prefer THT components but if it is SMD there won't be a problem.
- I also tried the idea with 2 transformers. One (50VA) 230V to 6VAV and one (50VA) 230VAC to 12VAC (secondary sides wired together). And I added rectifier and capacitors. But if I add a load (to reach 130mA ~ 1k2Ohm) the output voltage goes down from 160VDC to 120VDC.
So does anyone have an idea how to build a power supply with these power speficifications?
The load varies (min 0.5mA to max 130mA.)