Hmm, I think you need to give us a bit more info - your proposed circuit, supply voltage, etc. The mosfet and inductor won't complain much at 100C, but your LEDs might start to! And any electrolytic caps wont be winning any Long Service awards at those temperatures... Is the Mosfet running at this temp barbecue it is dissipating power, or is just in a hot place to begin with?
Make sure you are indeed switching the Mosfet cleanly - check the Vgs curves in the spec sheet. Remember that at high frequencies, the gate of a mosfet just looks like a capacitor - you really have to DRIVE current in to it - are you relying solely on the output of the SMPS IC? Re series and parallel LED combinations - general rule of thumb is to arrange your LED load closest to the supply voltage, so that your SMPS is not having to step up or down too far from the supply rail, in either direction. You will see losses if you go for a very low voltage but high current output, or vice-versa My two milliamps' worth - -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/NebPj95ag6cJ. For more options, visit https://groups.google.com/groups/opt_out.
