Energy-saving control device and energy-saving control method and power adapter including the same

A power adapter, comprising:

• an input end electrically connected to a power supply for receiving an AC power or DC power from the power supply;
• an output end comprising a cable interface on which a mechanical switch is set, wherein the mechanical switch has a first end and a second end, and the second end is an output end of the mechanical switch;
• a controller having an input terminal and an output terminal, wherein the input terminal of the controller is connected to the output end of the mechanical switch, and the output terminal of the controller outputs a switching control signal;
• and
• a power converter connected to the output terminal of the controller for receiving the switching control signal from the controller, wherein the power converter is operated according to the switching control signal,
• wherein, when a connection cable is plugged into the cable interface, the mechanical switch outputs a first signal to the controller, and the controller outputs a first switching control signal corresponding to the first signal to control the power converter to be operated at a normal mode;
• and when a connection cable is removed from the cable interface, the mechanical switch outputs a second signal to the controller, and the controller outputs a second switching control signal corresponding to the second signal to control the power converter to be operated at a hiccup mode.