Hello all,
I have a circuit I'd like to power with batteries. I'm thinking about using Li-Polymer 3.6V.
The circuit voltage need to be supplied by 5V. I have the idea of using two batteries in series as power source (7.2V), this also fits quite well the small space I have in my housing.
I'd like to load my batteries thanks to standard USB loader (meaning 5V source). And would like to keep the 5V source operational during my batteries are loading.
My question is.
How can I organize my power circuit to manage to have at one time the two batteries being in series in normal circuit operation (a step down circuit will generate the 5V from the 7.2V) and during the USB charger being connected, to have the batteries being in parallels to be loaded by the 5V source?
Any good recommendations?
NB: I'm talking about small system with batteries lower than 300 mAh...
I have a circuit I'd like to power with batteries. I'm thinking about using Li-Polymer 3.6V.
The circuit voltage need to be supplied by 5V. I have the idea of using two batteries in series as power source (7.2V), this also fits quite well the small space I have in my housing.
I'd like to load my batteries thanks to standard USB loader (meaning 5V source). And would like to keep the 5V source operational during my batteries are loading.
My question is.
How can I organize my power circuit to manage to have at one time the two batteries being in series in normal circuit operation (a step down circuit will generate the 5V from the 7.2V) and during the USB charger being connected, to have the batteries being in parallels to be loaded by the 5V source?
Any good recommendations?
NB: I'm talking about small system with batteries lower than 300 mAh...