I need to design a battery charger for my apllication 12V,10A .. Actually ,the charger should provide constant current ifthe battery voltage is below some level.. Otherwise it should provide CV to the battery. i read some papers in PI application notes,there it is specified CC & CV using two opamp output tied together using diode to generate a current signal..
1) Either of CC & CV should be in the loop,how its possible using opamp .. how one loop gets active and other one lost.
2) In application notes,its driving optocoupler, but i need error voltage at the output rather than current,how to acheive it..
Please tell me the operation.. i am struggling lot in that two loop feedback...