With these difficult times of high gasoline prices the usage of our automobiles has reduced to week-end trips and the vehicle spends a lot of time in the garrage. The car battery discharges slowly over time and needs to be 'Trickle Charged' to keep it in good condition.

This Flyback offline SMPS based charger provides 500mA of Dc current to charge a 12V Lead Acid Battery.

The perfomance curves show a high efficiency of > 85% and a charging current which starts at 600mA for a discharged battery and then tapers off to 500mA when the battery is fully charged.

The aj_12V_Trickle charger.rar file provides full details of the  Text-Book Design, Schematic, CAD files and detailed Waveforms.