Overvoltage protection circuit, connector, and semiconductor device

A connector comprising:

• a Type-C compatible physical layer (CCPHY),
• wherein the CCPHY comprises an overvoltage protection circuit,
• wherein the overvoltage protection circuit comprises:
• a current output circuit comprising a first transistor arranged between a power supply and a terminal and a second transistor arranged between the first transistor and the terminal, the current output circuit outputting the current to the first transistor to be driven such that a current flows from the power supply;
• a gate input circuit controlling a voltage of a gate and a voltage of a back gate of the second transistor,
• wherein the gate input circuit controls the voltage of the gate and the voltage of the back gate of the second transistor in response to a voltage applied to the terminal, and
• wherein the current output circuit protects the first transistor from the voltage applied to the terminal under control of the second transistor,
• wherein the gate input circuit comprises:
• a gate control circuit controlling the voltage of the gate and the voltage of the back gate of the second transistor;
• and
• an input control circuit inputting an input voltage to the gate control circuit,
• wherein the input control circuit changes the input voltage in response to the voltage applied to the terminal,
• wherein the gate control circuit controls the voltage of the gate and the voltage of the back gate of the second transistor in response to the input voltage,
• wherein the input control circuit comprises:
• a bias circuit generating a reference current;
• a control circuit controlling the input voltage;
• and
• a disable circuit configured to disable the bias circuit and the control circuit, and
• wherein the disable circuit disables the bias circuit and the control circuit such that the input control circuit inputs the same voltage value as that of the power supply, as the input voltage.

A semiconductor device comprising:

• an overvoltage protection circuit,
• wherein the overvoltage protection circuit comprises:
• a current output circuit comprising a first transistor arranged between a power supply and a terminal and a second transistor arranged between the first transistor and the terminal, the current output circuit outputting the current to the first transistor to be driven such that a current flows from the power supply;
• and
• a gate input circuit controlling a voltage of a gate and a voltage of a back gate of the second transistor,
• wherein the gate input circuit controls the voltage of the gate and the voltage of the back gate of the second transistor in response to a voltage applied to the terminal, and
• wherein the current output circuit protects the first transistor from the voltage applied to the terminal under control of the second transistor,
• wherein the gate input circuit comprises:
• a gate control circuit controlling the voltage of the gate and the voltage of the back gate of the second transistor;
• and
• an input control circuit inputting an input voltage to the gate control circuit,
• wherein the input control circuit changes the input voltage in response to the voltage applied to the terminal, and
• wherein the gate control circuit controls the voltage of the gate and the voltage of the back gate of the second transistor in response to the input voltage,
• wherein the input control circuit comprises:
• a bias circuit generating a reference current;
• a control circuit controlling the input voltage;
• and
• a disable circuit configured to disable the bias circuit and the control circuit, and
• wherein the disable circuit disables the bias circuit and the control circuit such that the input control circuit inputs the same voltage value as that of the power supply, as the input voltage.