I have build float dual charger using Uc3906. Results is very good. But I have a problem. battery voltage is reached from 23.5 to 27.5 Volt aproximately 4-5 hours; on the other, hand , reached for from 27,5 to 28,2 Volts aproximately 8 hours. This 8 hours very long and I want shortened %50. What should I do?
and other Question: Dual charger (not float) schema include RsH and Re; how I calculate this resistors value ?
Thank you
Sounds like you do not have enough input voltage near end of charge.
Increase the input voltage by at least 1V and see if that helps. Make sure your components are rated for the voltage.
Thanks for your answer.
our charger: Over charge voltage is 28,8 and Vin is 30,7.