Power supply device and electronic apparatus to supply stable voltage to normal device

A power supply device comprising:

• a power supply circuit configured to generate a direct current output voltage to be applied across both ends of a first natural number n, larger than one, of loads serially coupled;
• a detection circuit configured to detect an anomaly of a load voltage applied to each of the loads;
• a switch circuit, including switches respectively coupled in parallel to the loads, the switch circuit turning on a switch coupled in parallel to an abnormal load among the loads, where an abnormal increase of the load voltage is detected;
• and
• an adjustment circuit configured to adjust the output voltage, when an abnormal decrease of the load voltage of the abnormal load is detected after the one of the switches is turned on, the adjustment circuit decreasing the output voltage to v−(v/n)×m, where v is a voltage value of the direct current output voltage in a state where the anomaly is not detected, and m is a second natural number less than n, of the at least one abnormal load.

An electronic apparatus comprising:

• a plurality of loads serially coupled, the loads numbering n, where n is a first natural number;
• a power supply circuit configured to generate a direct current output voltage to be applied across both ends of the plurality of loads;
• a detection circuit configured to detect an anomaly of a load voltage applied to each of the plurality of loads;
• and
• an adjustment circuit configured to decrease the output voltage, in accordance with a second natural number m of at least one abnormal load where the anomaly is detected among the plurality of loads, to a reduced voltage of v−(v/n)×m, where v is the output voltage in a state where the anomaly is not detected and m<n.