Universal power supplying apparatus and universal power supplying method

A universal power supplying apparatus comprising:

• a power supplying unit that converts an input power into a driving power having a previously set voltage level and supplies the converted power;
• a power recognizing unit that recognizes connection of a device according to an impedance variation of an output terminal from which power is output, and controls a power output of the power supplying unit according to a detected rated output;
• and
• a detecting unit that provides a detection voltage having the previously set voltage level to the output terminal.

A universal power supplying method comprising:

• detecting a decreased voltage level of a recognized voltage supplied to an output terminal from which power is output;
• when the decreased voltage level is smaller than a previously set reference voltage level, recognizing that a device is connected to the output terminal and supplying a detection voltage having a previously set voltage level to the output terminal;
• and
• when the decreased voltage level of the detection voltage is smaller than a previously set reference voltage decrease level, supplying a driving power having a previously set voltage level to the device connected to the output terminal.

A universal power supplying method comprising:

• detecting an impedance variation of a power output terminal;
• when a degree of impedance variation is greater than a previously set reference value, recognizing that a device is connected to the output terminal and supplying a detection voltage having a previously set voltage level to the output terminal;
• and
• when the decreased voltage level of the detection voltage is smaller than a previously set reference voltage decrease level, supplying a driving power having a previously set voltage level to the device connected to the power output terminal.