What would happen if I charge a LiPo battery with a constant current source?
I know that properly it should be charged constant-current until 4.2V and then constant-voltage mode, but what if I just keep sourcing current to it, will it exceed the 4.2 limit or it will charge happily at 4.2V with whatever current it needs?
Charger schematics is taken from LM1084 datasheet.
In this application the LM1084 acts as a constant voltage, constant current part by sensing the voltage potential across the battery and compensating it to the current voltage. To maintain this voltage, the regulator delivers the maximum charging current required to charge the battery. As the battery approaches the fully charged state, the potential drop across the sense resistor Rs reduces and the regulator throttles back the current to maintain the float voltage of the battery
With suggested schematics you can set current to say 5A at 3.5V and only 100mA at 4.2V, but will battery stop at 4.2V by itself or not?