I need help comparing two different mosfets. The application is a Nixie tube SMPS. The 2SK3772-01 is really hard to find. The IXFP36N30P3 is still available. Both are TO-220 parts. I've attached both pdf's and the schematic. I did look and they seem close but was hoping someone could look them over and see if there was something I'm overlooking.
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Why not use the IRF644 that's called out? The IRF644PBF is a current Vishay part that's available at Mouser for $1.45. The "PBF" simply means Lead Free, but it's functionally the same part.
BTW, before Ron Dekker (in NL) developed his uTracer he was nixied -- has some very interesting circuits: Flyback Converters for Dummies
Sorry, I didn't give all of the information. There is a high current version that the author experiments with. It calls for a couple of parts substitutions including the Fet.
Thanks for the link Jackinnj.
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