Electronic device using USB type-c port and charging method thereof

Abstract

A charging method for an electronic device using a Type-C universal sequence bus. The electronic device has a first Type-C universal sequence bus and a second Type-C universal sequence bus. In response to the first Type-C universal sequence bus entering an overvoltage protection mode or an overcurrent protection mode, the control circuit can control the power transfer controller circuit to change the power transfer protocol to reduce the maximum current limited by the power transfer protocol.

Claims

1. An electronic device using a Type C Universal Sequence Bus port, comprising: Type 1 C Universal Sequence Bus Port; Type 2C Universal Sequence Bus Port; A charging circuit coupled to the first Type-C universal sequence bus port and the second Type-C universal sequence bus port, receiving an input power from the first Type-C universal sequence bus port; a control circuit coupled to the charging circuit; and a power transfer controller circuit coupled to the control circuit, the first Type-C universal sequence bus port, and the second Type-C universal sequence bus port, wherein in response to the first Type-C universal sequence bus port entering an overvoltage protection mode or an overcurrent protection mode, the control circuit controls the power transfer controller circuit to change a power transfer protocol to reduce the maximum current limited by the power transfer protocol.

2. The electronic device using a Type C Universal Sequence Bus port as described in claim 1, further comprising: A battery is coupled to the charging circuit, which charges the battery. The system includes a main system circuit coupled to the battery, the charging circuit, the first C-type universal serial bus, and the second C-type universal serial bus, receiving at least one of the input power supply and the battery voltage provided by the battery. The charging circuit detects a load current and an output voltage provided by the input power supply to the main system circuit. The control circuit controls the power transfer controller circuit to change the power transfer protocol based on the load current and the output voltage provided by the input power supply at a preset current, so as to adjust the maximum current limited by the power transfer protocol.

3. The electronic device using a Type C universal sequence bus as described in claim 2, wherein the output voltage is less than a preset voltage when the load current is at a preset current, and the control circuit controls the power delivery controller circuit to reduce the maximum current limited by the power delivery protocol.

4. The electronic device using a Type C universal sequence bus as described in claim 1, wherein the charging circuit determines that the first Type C universal sequence bus has entered the overvoltage protection mode or the overcurrent protection mode when the voltage or current of the input power supply is equal to 0, and notifies the control circuit that the first Type C universal sequence bus has entered the overvoltage protection mode or the overcurrent protection mode.

5. The electronic device using a Type C Universal Sequence Bus port as described in claim 1, wherein the power delivery controller circuit communicates with the device connected to the second Type C Universal Sequence Bus port according to the modified power delivery protocol.

6. A charging method for an electronic device using a Type-C Universal Sequence Bus (USB), the electronic device comprising a first USB, a second USB, and a power delivery controller circuit, the power delivery controller circuit being coupled to the first USB and the second USB, the charging method comprising: Receive an input power supply from the first Type C Universal Sequence Bus port; And in response to the first C-type general sequence bus port entering an overvoltage protection mode or an overcurrent protection mode, control the power transfer controller circuit to change a power transfer protocol to reduce the maximum current limited by the power transfer protocol.

7. A charging method for an electronic device using a Type-C Universal Sequence Bus (USB) as described in claim 6, the electronic device further comprising a main system circuit coupled to the first USB and the second USB, the main system circuit receiving the input power, the charging method comprising: The power transfer controller circuit changes the power transfer protocol based on the load current supplied to the main system circuit by the input power supply at a preset current, thereby adjusting the maximum current limited by the power transfer protocol.

8. A charging method for an electronic device using a Type C Universal Sequence Bus port as described in claim 7, comprising: When the load current is at a preset current and the output voltage is less than a preset voltage, the power transfer controller circuit is controlled to reduce the maximum current limited by the power transfer protocol.

9. A charging method for an electronic device using a Type C Universal Sequence Bus port as described in claim 6, comprising: When the voltage or current of the input power supply is equal to 0, it is determined that the first C-type general sequence bus port enters the overvoltage protection mode or the overcurrent protection mode.

10. A charging method for an electronic device using a Type C Universal Sequence Bus port as described in claim 6, wherein the power delivery controller circuit communicates with the device connected to the second Type C Universal Sequence Bus port according to a modified power delivery protocol.

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