Hi Gaston, Good points... Going deeper on where I am with the design at the moment...
I considered the BSS84 early on as I have some in the spare parts bin... but... > BSS84 is a nice part and I use it a lot, but only rated for 130 mA and I'll be running around 200 mA continuous in this application. Also has significant Rds(on) at -5 V of 10 ohms max... can be too high for my application. > Si1013R is rated 350 mA continuous at 25C and Rds(on) at 4.5 V of 1.2 ohms max. Simulation already done to confirm Vgs comfortably within limits as circuit operates and transitions on->off and off-> on. So getting closer with the Si1013R (which also happened to be in the built-in LTSpice library). But, as you point out, the Si1013R will be in trouble with a 12V rail... so I'm still looking. I'd really like to build one little board for a wide range of applications... at least 12V operating, at least 1 A operating. Currently leaning toward the NTF5P03T3G... will probably stop looking as this is a more than adequate selection for current and anticipated needs. SOT-223 tabbed package that is still easy for hand solder if necessary, way lower Rds(on), ample voltage and current limits. Alternative parts available in the same package and pin-out... Thought about a dual footprint board so that I can load a SOT-23 if I want for a given application... will probably just use the larger 223 and be done with it. Typically have the modest additional space needed.... say 1" x 0.4 " or a bit smaller total board size with the 223. <https://lh3.googleusercontent.com/-xUcm8uEHJS0/WdOxskgvxTI/AAAAAAAAAXs/QShPUBh3Xx8XLei0v90yJvxuRjcgwIjEwCLcBGAs/s1600/ExtreameSlowStartLayout04.JPG> I'll update the post when I have parts selected and a layout I like. B -- 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/d5ffb1ce-5e19-45c7-92bf-1a09881d4246%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
