Li-Ion Constant Current Constant voltage charger

[BillyBobjoe]

Hi

I need help designing a constant current constand voltage charger for li-ion batteries.
Anyone have any help?
Whats the best method of constant current. It will be high current over 1 Amps

Thanks

 

[Pumblechook]

I think there is an L200 (chip) which is a combined voltage and current regulator. Can't remember what current it will do though.

Can be boosted with power transistors.

http://www.radiolocman.com/shem/shem-cache.html?di=11186

 

[famousken]

Constant current, limited voltage is the way to charge li-ion, charge at a constant current and cut current as voltage reaches 4.2v per cell.