Universal serial bus port controller and electronic apparatus for preventing inrush current during power delivery
Disclosed herein is a universal serial bus Type-C port controller mountable in a sink compatible with universal serial bus power delivery, the sink mounted with the universal serial bus port controller including a receptacle including a 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 includes 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 threshold voltage.
1 . A universal serial bus Type-C port controller mountable in a sink compatible with universal serial bus power delivery,
the sink mounted with the universal serial bus Type-C port controller including
a receptacle including a 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.
2 . The universal serial bus Type-C port controller according to claim 1 , wherein
the bypass circuit includes a selector having a first terminal, a second terminal, and a third terminal, the first terminal being connected to the power supply terminal, the second terminal being connected to the capacitor, and the third terminal being connected to the limiting resistance, and
conduction occurs between the first terminal and the second terminal in the bypass state, and conduction occurs between the first terminal and the third terminal in the non-bypass state.
3 . The universal serial bus Type-C port controller according to claim 1 , wherein
a first end of the limiting resistance is connected to the power supply terminal, and a second end of the limiting resistance is connected to the capacitor,
the bypass circuit includes a first switch connected in parallel with the limiting resistance, and
the first switch is on in the bypass state and is off in the non-bypass state.
4 . The universal serial bus Type-C port controller according to claim 3 , wherein
the bypass circuit further includes a second switch connected between the power supply terminal and the capacitor and in series with the limiting resistance, and
the second switch is off in the bypass state and is on in the non-bypass state.
5 . The universal serial bus Type-C port controller according to claim 1 , wherein
the bypass circuit is included in the universal serial bus Type-C port controller.
6 . The universal serial bus Type-C port controller according to claim 1 , wherein
the limiting resistance is included in the universal serial bus Type-C port controller.
7 . The universal serial bus Type-C port controller according to claim 1 , wherein
the universal serial bus port Type-C controller is integrally integrated on one semiconductor substrate.
8 . An electronic apparatus comprising:
a universal serial bus Type-C port controller according to claim 1 .
9 . 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.
10 . 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.
11 . The universal serial bus Type-C port controller according to claim 10 , wherein
the bypass circuit includes a selector having a first terminal, a second terminal, and a third terminal, the first terminal being connected to the power supply terminal, the second terminal being connected to the capacitor, and the third terminal being connected to the limiting resistance, and
conduction occurs between the first terminal and the second terminal in the bypass state, and conduction occurs between the first terminal and the third terminal in the non-bypass state.
12 . The universal serial bus Type-C port controller according to claim 10 , wherein
a first end of the limiting resistance is connected to the power supply terminal, and a second end of the limiting resistance is connected to the capacitor,
the bypass circuit includes a first switch connected in parallel with the limiting resistance, and
the first switch is on in the bypass state and is off in the non-bypass state.
13 . The universal serial bus Type-C port controller according to claim 12 , wherein
the bypass circuit further includes a second switch connected between the power supply terminal and the capacitor and in series with the limiting resistance, and
the second switch is off in the bypass state and is on in the non-bypass state.
14 . The universal serial bus Type-C port controller according to claim 10 , wherein
the bypass circuit is included in the universal serial bus Type-C port controller.
15 . The universal serial bus Type-C port controller according to claim 10 , wherein
the limiting resistance is included in the universal serial bus Type-C port controller.
16 . The universal serial bus Type-C port controller according to claim 10 , wherein
the universal serial bus Type-C port controller is integrally integrated on one semiconductor substrate.
17 . An electronic apparatus comprising:
a universal serial bus Type-C port controller according to claim 10 .
18 . 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.