Universal serial bus port controller and electronic apparatus for preventing inrush current during power delivery

An electronic apparatus as a sink compatible with universal serial bus power delivery, the electronic apparatus comprising:

• a universal serial bus receptacle including a power supply terminal;
• an internal circuit;
• a capacitor;
• an input switch connected between the power supply terminal and the internal circuit;
• a limiting resistance connected between the power supply terminal and the capacitor;
• a bypass circuit that is switchable between a bypass state and a non-bypass state, and bypasses the limiting resistance in the bypass state;
• and
• a universal serial bus Type-C port controller that monitors a voltage of the power supply terminal, sets the bypass circuit in the non-bypass state when the voltage of the power supply terminal is lower than a predetermined threshold voltage, and sets the bypass circuit in the bypass state when the voltage of the power supply terminal is higher than the predetermined threshold voltage.

A universal serial bus Type-C port controller mountable in a source compatible with universal serial bus Type-C,

• the source mounted with the universal serial bus Type-C port controller including
• a receptacle having a power supply terminal and a configuration channel terminal,
• a power supply circuit,
• an output switch disposed between the power supply circuit and the power supply terminal,
• a capacitor,
• a limiting resistance connected between the power supply terminal and the capacitor, and
• a bypass circuit that is switchable between a bypass state and a non-bypass state, and bypasses the limiting resistance in the bypass state,
• the universal serial bus Type-C port controller comprising:
• a charge control unit that monitors a voltage of the power supply terminal, sets the bypass circuit in the non-bypass state when the voltage of the power supply terminal is lower than a predetermined threshold voltage, and sets the bypass circuit in the bypass state when the voltage of the power supply terminal is higher than the predetermined threshold voltage;
• and
• a switch control unit that controls the output switch on a basis of a state of the configuration channel terminal.

An electronic apparatus as a source compatible with universal serial bus Type-C, the electronic apparatus comprising:

• a receptacle having a power supply terminal and a configuration channel terminal;
• a power supply circuit;
• an output switch disposed between the power supply circuit and the power supply terminal;
• a capacitor;
• a limiting resistance connected between the power supply terminal and the capacitor;
• a bypass circuit that is switchable between a bypass state and a non-bypass state, and bypasses the limiting resistance in the bypass state;
• and
• a universal serial bus Type-C port controller that monitors a voltage of the power supply terminal, sets the bypass circuit in the non-bypass state when the voltage of the power supply terminal is lower than a predetermined threshold voltage, sets the bypass circuit in the bypass state when the voltage of the power supply terminal is higher than the predetermined threshold voltage, and controls the output switch on a basis of a state of the configuration channel terminal.