If you need a good MOSFET with a low Vgs(on), consider the DMN6040SVT. It has a low Rds(on), around 60 milliohms. My wristwatch uses this for the DC-DC converter for these reasons, and also because it has very low leakage. I drive the gate at 3.2V .
BUT.....if you use this device, you must use a transformer (basically 2 coupled inductors), to reduce the "kickback" spike that occurs while the HV cap is charging. The DMN6040SVT will only tolerate 60V, so if you want to generate 180V, you will want a transformer that is at least a 4:1 turns ratio. Mine is 10:1 . Finding low Vgs(on) devices with a high Vds is difficult; there are not very many and this was the best one I could find for my application. You may want to look into circuit changes that will give you a higher Vgs. -- 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/075bfa73-0dee-43fe-bd62-138960054193%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
