Posted on May 17, 2011 at 12:50Hello,
I have in the datsheet found the STM32 uses 1.4uA to 1.9uA from the backup battery when power is off.
I like to use a supercap, and have calculated 0,1F gives approx. 30hour and 1,0F gives approx. 12 days, based on power supply of 3.3V and cut off voltage of 1,8V.
Have anyone made simular calculation and can confirm my numbers?
Also, anyone have a link to a good supercap, i have difficults in finding more than 1MF and equal or higher than 3.3V
Best Regards
Kasper
