High Efficiency Charger Circuit of SI8050S

Published:2011/7/23 6:08:00 Author:Michel | Keyword: High Efficiency, Charger Circuit | From:SeekIC

The above picture is high efficiency charger circuit of SI8050S.There are switch transistor and control circuit within SI8050S.Dividing resistor R1 and R2 are used for setting output voltage and the circuit voltage is 13.72V.Rs is used to test output current and SI8050S output voltage are regulated by VT1 and VT2.Thus it is consistent with voltage of charging batteries and it outputs about 3A constnt current.In this circuit,the input voltage Ui is +17~+30V and the maximum output voltage U。is 13.8V and the current is 3A.Rs resistance value is confirmed according to the following formula,namely,Rs=UBE/3A=0.7V/3A≈0.23Ω and 0.22Ω is chosen in the circuit.



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