CN-111431409-B - System with multiple Type-C interfaces and control method thereof

Abstract

A system having a plurality of Type-C interfaces and a control method thereof are disclosed. The external device provides a required power supply voltage for the system through one of the Type-C interfaces, energy can be transmitted to the corresponding external device through the other Type-C interfaces, and a power converter for voltage conversion between the system and each external device can be controlled to work in a buck, boost or pass-through mode so as to reduce the volume and cost of the system.

Inventors

• YU ZIMING
• WU ZHENJIA
• REN PINRUI
• HUANG WEIZHI
• FAN HONGFENG

Assignees

• 矽力杰半导体技术(杭州)有限公司

Dates

Publication Date

20260508

Application Date

20200430

Claims (15)

1. 1. A system having a plurality of Type-C interfaces, comprising: A plurality of Type-C interfaces for connecting a plurality of external devices, and The system comprises a plurality of bidirectional power conversion circuits, a plurality of voltage conversion circuits and a plurality of voltage conversion circuits, wherein each bidirectional power conversion circuit is connected between a power supply end of the system and a corresponding Type-C interface so as to perform voltage conversion; The control circuits are configured to control the corresponding working modes of the two-way power supply conversion circuits according to the power supply information of the external equipment connected with the Type-C interface and the power supply voltage of the system, so that the two-way power supply conversion circuits are controlled to be in different working modes according to the power supply information of each external equipment; And each control circuit is communicated with each other to select one of the external equipment with strong output capacity to supply power for the system.
2. 2. The system of claim 1, wherein the power conversion circuit is controlled to operate in a buck mode, a boost mode, or a pass-through mode.
3. 3. The system of claim 1, wherein the power conversion circuit comprises: The first power tube is connected with the power supply end of the system at a first end; A second power tube connected between the second end of the first power tube and the reference ground, and The first end of the inductor is connected with the common end of the first power tube and the common end of the second power tube, and the second end of the inductor is connected with the corresponding Type-C interface.
4. 4. The system of claim 1, further comprising: And a plurality of capacitors connected between each Type-C interface and the reference ground to stabilize the voltage at the interface.
5. 5. The system of claim 4, further comprising: And the switches are connected between each Type-C interface and the capacitor to inhibit the surge current of the Type-C interface.
6. 6. The system of claim 5, wherein the switch is controlled to be in an off state prior to energy transfer between the external device and the system.
7. 7. The system of claim 5, wherein the switch is controlled to remain on during energy transfer between the external device and the system.
8. 8. The system of claim 1, wherein the power information of the external device includes input and output capabilities of the external device.
9. 9. The system according to claim 1, wherein the control circuit corresponding to the external device as the power supply controls the corresponding power conversion circuit to operate in the through mode or the boost mode according to the voltage supplied by the external device, the power supply voltage of the system, and the voltage of the external device to be charged.
10. 10. The system according to claim 1, wherein the control circuit corresponding to the external device to be charged controls the corresponding power conversion circuit to operate in either the pass-through mode or the step-down mode according to the power supply voltage of the system and the voltage required by itself.
11. 11. A control method for a system having a plurality of Type-C interfaces, comprising: acquiring power supply information of external equipment connected with each Type-C interface; Selecting one of the external devices with strong output capability to supply power to the system, and The control circuits control the working modes of the corresponding bidirectional power conversion circuits according to the power information of each external device and the power supply voltage of the system, so that the bidirectional power conversion circuits are controlled to be in different working modes according to the power information of each external device; And each control circuit is communicated with each other to select one of the external equipment with strong output capacity to supply power for the system.
12. 12. The control method of claim 11, wherein the power conversion circuit is controlled to operate in a buck mode, a boost mode, or a pass-through mode.
13. 13. The control method according to claim 11, wherein the power information of the external device includes input and output capabilities of the external device.
14. 14. The control method according to claim 11, wherein the corresponding power conversion circuit is controlled to operate in a through mode or a boost mode according to a voltage supplied from an external device having a strong power supply capability, a power supply voltage required by a system, and a voltage required by an external device to be charged.
15. 15. The control method according to claim 11, wherein the corresponding power conversion circuit is controlled to operate in a pass-through mode or a step-down mode according to a power supply voltage of the system and a voltage required by an external device to be charged.

Description

System with multiple Type-C interfaces and control method thereof Technical Field The invention relates to the technical field of power electronics, in particular to a system with a plurality of Type-C interfaces and a control method thereof. Background The Type-C interface is a Type of connection interface for Universal Serial Bus (USB). Since it supports USB duplex insertion, it is increasingly widely used in mobile terminals. The Type-C interface defines various functions such as charging, data transmission, audio signal transmission, or display output. However, the mobile terminal on the market generally has only 1 Type-C interface, and cannot output when it is used for input, and similarly cannot input when it is used for output. In order to meet the function of voltage boosting and reducing, a buck/boost circuit is often adopted by the voltage conversion chip, so that more power tubes are needed, and the volume and the cost are increased. Disclosure of Invention Accordingly, an object of the present invention is to provide a system with dual Type-C interfaces and a control method thereof, in which an external device provides a power supply voltage to the system through one of the interfaces, and simultaneously can transmit energy to the corresponding external device through the other interface, and a power converter for voltage conversion between the system and each external device can operate in a buck, boost or pass-through mode, so as to reduce the volume and cost of the system. According to a first aspect of the present invention, there is provided a system having a plurality of Type-C interfaces, comprising: A plurality of Type-C interfaces for connecting a plurality of external devices, and A plurality of bi-directional power conversion circuits, each of which is connected between a power supply terminal of the system and a corresponding Type-C interface for voltage conversion, wherein The power conversion circuit is controlled to be in different working modes according to the power information of each external device. Further, the power conversion circuit is controlled to operate in a buck mode, a boost mode or a pass-through mode. Further, the power conversion circuit includes: The first power tube is connected with the power supply end of the system at a first end; A second power tube connected between the second end of the first power tube and the reference ground, and The first end of the inductor is connected with the common end of the first power tube and the common end of the second power tube, and the second end of the inductor is connected with the corresponding Type-C interface. Further, the system further comprises: And a plurality of capacitors connected between each Type-C interface and the reference ground to stabilize the voltage at the interface. Further, the system further comprises: And the switches are connected between each Type-C interface and the capacitor to inhibit the surge current of the Type-C interface. Further, the switch is controlled to be in an off state prior to energy transfer between the external device and the system. Further, the switch is controlled to remain on during energy transfer between the external device and the system. Further, the system further comprises: And the control circuit is configured to control the working mode of the power conversion circuit according to the power supply information of the external equipment connected with the Type-C interface and the power supply voltage of the system. Further, the power information of the external device includes input and output capabilities of the external device. Further, each control circuit is communicated with each other to select one of the external devices with strong output capacity to supply power for the system. Further, the control circuit corresponding to the external device serving as the power supply controls the corresponding power supply conversion circuit to work in the through mode or the boost mode according to the voltage provided by the external device, the power supply voltage of the system and the voltage of the external device to be charged. Further, the control circuit corresponding to the external device to be charged controls the corresponding power conversion circuit to work in the through mode or the step-down mode according to the power supply voltage of the system and the voltage required by the control circuit. According to a second aspect of the present invention, there is provided a control method for a system having a plurality of Type-C interfaces, comprising: acquiring power supply information of external equipment connected with each Type-C interface; Selecting one of the external devices with strong output capability to supply power to the system, and And controlling the working mode of the corresponding power supply conversion circuit according to the voltage of each external device and the power supply voltage of the system. Further, the power conversion circu