It may not be out door's.. the electronics/computer's may be inside near a heat source, I having seen electronics covered up by the end user's many times. (how many routers have you seen under a pile of books.. clothing ? ..etc ) then there is fan's breaking, air ventilation hole's fill with dust, cat hair etc. it's not just out door's which may provide and nasty environment. The second problem is super cap's have high internal resistance, which limit's how much current you can pull from them. Problem there is problem is how much of the capacity of the super cap are you using ? a 5V super cap backing up power to a 5v to 3.3v switching reg, or liner reg may only give you 4.3 volts before the reg start's dropping the 3.3v power rail. So there may be only 0.7V of the super capacity you are using. And to get around that, you need a SEPIC switching reg, and of course your drawing big currents once you start drooping to 1 or 2 volts of the super cap. So the cost of having a Electro running at 40 or 50V, where you will get almost all of it's capacity is not a bad trade off, when you see that you will have even bigger problem with supper caps and extracting there full capacity. And you will be switch much higher currents to get your 3.3V's from it.
Lachlan On Thu, May 19, 2016 at 8:33 AM, Super Twang <supertw...@gmail.com> wrote: > @Lachlan > Thanks for the info Lachlan. > > Re: Supercap reliability… > My basic understanding is that if you design with supercaps for a > “Everyday” (ie not too hardcore) indoor use case, and keep them within some > pretty obtainable operating conditions they effectively last forever. > Obviously there’s some ambiguity (“everyday” “pretty obtainable”, > “effectively”) in the prior assertion, but... > > My particular use case — indoor temps but in a wall, 5v power — might see > a temp range of 15° - 35°C max I’d guess. The 70°C - 105°C you’re talking > about would have to be a pretty harsh/industrial environment, no? > > Does anyone (who has done it, or knows how) have a sense of how > straightforward it is to achieve a supercap-based system design that keeps > the components in a range that’d keep them healthy for “Effectively > forever?” ie 20k+ cycles? (better than bats) 100k+? (effectively forever) > Or, do the requirements we’re looking at for a basic, indoor, power system > really push the supercaps into the “Quickly-used-up” zone? > > Best, > ST > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/F2A9E16C-3FED-44BD-AE07-F928C1477305%40gmail.com > . > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAMkt-MvJMz8Ab_xjC6uXnGWw6maqfEWMYFbJAzO73p0msAxCnQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
