Patent ID: 8259482

Claim:
A power adapter apparatus, suitable for supplying power to an electronic device, the power adapter apparatus comprising: an output interface having a telescopic switch, the telescopic switch being movably disposed on a surface of the output interface; a power modulation unit electrically connected with an external power source, the power modulation unit being coupled to the output interface; a control unit coupled to the power modulation unit; and a detection unit coupled to the detective node and the control unit; wherein when the detection unit detects that the output interface is connected to the electronic device according to a telescopic state of the telescopic switch, the detection unit informs the control unit to switch the power modulation unit into a working state, such that the power modulation unit modulates on the external power source and supplies electricity to the output interface for driving the electronic device; wherein when the detection unit detects that the output interface is not connected to the electronic device according to the telescopic state of the telescopic switch, the detection unit informs the control unit to switch the power modulation unit into a standby state, so as to reduce a total power consumption of the power modulation unit.