ste2006
Advanced Member level 4
Hi,
This is probably a simple question but a little experience or advice would be great. I am designing a new system using a micro-controller and a few other bits but it turns out to battery back up the RTCC and nothing else is quite tricky and it is probably simpler and cheaper to just use a separate RTCC chip.
With this in mind i am going to use the AB8013 chip which has provision to charge a backup source with automatic switch-over if the main power fails.
I am currently looking at super capacitors for this purpose but i am not sure what voltage i need. All of the super capacitors seem to be rated quite low. The circuit itself is using 3.3V so is a 3.3V Super Capacitor acceptable?
Normally for an electrolytic capacitor i would give lots of margin on the voltage but to do that here i would have to put two of these capacitors in series and i don't have the board space.
I read elsewhere that normally super capacitors can be used at their rated voltage no problem,
Any thoughts??
Thanks,
This is probably a simple question but a little experience or advice would be great. I am designing a new system using a micro-controller and a few other bits but it turns out to battery back up the RTCC and nothing else is quite tricky and it is probably simpler and cheaper to just use a separate RTCC chip.
With this in mind i am going to use the AB8013 chip which has provision to charge a backup source with automatic switch-over if the main power fails.
I am currently looking at super capacitors for this purpose but i am not sure what voltage i need. All of the super capacitors seem to be rated quite low. The circuit itself is using 3.3V so is a 3.3V Super Capacitor acceptable?
Normally for an electrolytic capacitor i would give lots of margin on the voltage but to do that here i would have to put two of these capacitors in series and i don't have the board space.
I read elsewhere that normally super capacitors can be used at their rated voltage no problem,
Any thoughts??
Thanks,