A protection circuit

Example embodiments provide a protective circuit, is applied to inductive boost converter, said boost converter comprises inductive transmission circuit and the charging circuit, the protection circuit includes a detection circuit and a control circuit of the present invention, the detection circuit an input terminal connected to an output of said transmission circuit, the first output terminal of the detection circuit is connected to the input terminal charging circuit, the detection circuit output terminal and the second input of the control circuit end; said current detecting circuit detecting input of the transmission circuit if a short circuit current, when the detection result is yes, the detection results transmitted to the control circuit, the control circuit turns off the charging circuit is connected to the ground electrode, prevent the charge stored in the charging circuit to the input of the intrusion inductive boost converter. Embodiments of the present invention can effectively prevent a current backflow to the input terminal, to improve the safety of the inductor type booster converter.