A Circuit for charging NiCd, NiMH and Lithium-Ion Batteries.PWM 500kHz with Soft Start and Shutdown Control.
Some things to know in battery charging. A battery that has drained will almost appear like a short circuit to the charger. A battery is never fully drained, if you want a nice battery life. Overcharging a battery can damage it and is not safe too. We have to charge it with an optimum current, upto a Top up charge voltage only. Then a trickle to compensate for internal leakage on no-load. Float charging and Cyclic charging are some popular methods.
It can charge lithium-ion (Li-Ion), nickel-metal-hydride (NiMH) and nickel-cadmium (NiCd). These require constant-current and constant-voltage charging. A 2A peak current switch for Boost Charging may be helpful for charging Lead Acid Batteries too. A 0.1 ohm current sense shunt makes charging current programmable.