Remote sensing circuit and high-power supply apparatus having the same

A high-power supply apparatus, comprising:

• a high power generating unit;
• a feedback circuit unit to feedback power output from the high power generating unit to an input terminal of the high-power supply apparatus;
• a switching unit connected between an output terminal of the high power generating unit and the feedback circuit unit to open the connection in a normal status and to close the connection in an abnormal status;
• a load channel to connect the high-power supply apparatus to a load;
• and
• a remote sensing unit having one terminal commonly connected to the load and the load channel and another terminal commonly connected to the switching unit and the feedback circuit unit to sense power supplied to the load.

An image forming apparatus comprising:

• an image forming unit to form an image;
• and
• a high-power supply apparatus to supply high power to the image forming unit,
• wherein the high-power supply apparatus comprises:
• a high power generating unit;
• a feedback circuit unit to feedback power output from the high power generating unit to an input terminal of the high-power supply apparatus;
• a switching unit connected between an output terminal of the high power generating unit and the feedback circuit unit to open the connection in a normal status and to close the connection in an abnormal status;
• a load channel to connect the high-power supply apparatus to a load;
• and
• a remote sensing unit having one terminal commonly connected to the load and the load channel, and another terminal commonly connected to the switching unit and the feedback circuit unit to sense power supplied to the load.

An electronic device having a power supply to supply power to the electronic device and a sensing circuit to control an over voltage of the power supply, the sensing circuit comprising:

• a switching unit connected between an output terminal of the power supply and a feedback input of the power supply to selectively open and close a first connection between the output terminal and the feedback input;
• and
• a sensing unit having one terminal connected to a load channel of the power supply and another terminal connected to the feedback input of the power supply to sense the power supplied to the load channel,
• wherein when an output voltage of the load channel exceeds a predetermined threshold value, the switching unit closes the first connection to reduce the amount of current flowing through the load channel.