Electronic device and control method of electronic device

An electronic device which supplies power to an external device, comprising:

• a plurality of connection ports for connecting a plurality of external devices respectively;
• a power supply for supplying power to the connected external devices through the plurality of connection ports;
• a plurality of switches corresponding respectively to the plurality of connection ports,
• wherein each switch is arranged between the power supply and a corresponding connection port, and receives a control signal for controlling whether or not to supply power to the connected external device through the corresponding connection port, and supplies, to the connected external device through the corresponding connection port, power having been supplied from the power supply based on the received control signal, detects supplying an overcurrent to the external device and outputs an overcurrent detection signal based on the detection;
• a controller having a plurality of output terminals for outputting, to the plurality of switches, the control signals,
• wherein the controller has a shared terminal for receiving respective overcurrent detection signals output from the plurality of switches, and outputs, to one of the switches, the control signal to cause the one switch not to supply the power having been supplied from the power supply to an external device through the corresponding connection port if receiving the overcurrent detection signal by the shared terminal.

A control method of an electronic device comprising a plurality of external interfaces and capable of supplying a current to external devices connected via the external interfaces, respectively, the control method comprising:

• a first output step of outputting, by power supply control units corresponding to the respective external interfaces, a detection of overcurrent supplied to the external devices as an overcurrent detection signal;
• a second output step of outputting, by a control unit having (i) a shared terminal for accepting input of an overcurrent detection signal from each of the power supply control units and (ii) respective terminals for outputting, to the power supply control units, a power supply control signal for instructing to control whether to supply or shutoff a current to each of the external device;
• a selection step of selecting, by the control unit, one of the external interfaces as a target of overcurrent detection in a predetermined order;
• a switching step of switching, by the control unit, output of the power supply control signal to the power supply control unit corresponding to the selected external interface;
• and
• a control step of controlling, by the control unit, the power supply control signal for the power supply control unit corresponding to the selected external interface to be switched off in a case where a state of the common overcurrent detection signal is changed in response to the switching of the output of the power supply control signal.