thank you VE1BLL for the time you spare...
all sounds good on your approach, but the battery is what makes this circuit tricky.
What I mean is that the battery type to use, imposes various restrictions and requires extra circuitry in order to avoid situations like overcharge, overdischarge...
your suggestion sounds good, but an SLA battery is quite bulky and heavy for my application (portable with a form factor that of AA size cells)...
any other suggestions [ponder]
The dc converter is to scale the voltage down to IC levels (the charging IC needs 5V to work).
The 3V I need for my load.
I think that plugging the cell to the battery is not the the most efficient way to charge the battery.
VE1BLL,
If I use the serial line architecture you propose, do you think adding a dc converter after the solar cell will enhance the effieciency any any way? I am asking this first of all because the solar cell is rated at 6Voc and 400ma Isc, hence need to step this voltage down to 5V (for IC to...
Sorry for the misconception guys...in my design context the rechargableBattery block is effectively a block comprised of a charging IC (which can regulate the output)+rechargeable cells.
to make things more clear, this is a crude visualization of the situation
...................solarCell
..................|..........|
....dcConverter.......rechargableBattery
..................|.........|
...................\......./
..............powerSourceSelectCircuit...
Dear all,
what is the most power efficient way to choose between two power sources?
To be more precise, I have a solar powered circuit with a dc regulated output and a rechargable battery, and want to be able to automatically select the best of those two upon voltage level conditions...
Dear all,
what is the most power efficient way to choose between two power sources?
To be more precise, I have a solar powered circuits with a dc regulated output and a rechargable battery, and want to be able to automatically select the best of those two upon voltage level conditions...
