A USB Type-C docking station EPR converter

Abstract

The present application relates to the field of USB Type-C PD3.1EPR docking station, and specifically discloses a USB Type-C docking station EPR converter, which can convert traditional USB DisplayLink docking station, DP Alt-mode docking station, thunderbolt 3 docking station, USB4 docking station and thunderbolt 4 docking station into PD3.1EPR docking station, which can charge the computer with 28V according to the specification of PD3.1EPR docking station, and can also retain all the original functions of the docking station. The simple and compact structure minimizes the circuit of the product and reduces the signal transmission attenuation to the minimum.

Description

Technical Field

[0001] This invention belongs to the field of charging and communication connection technology for power electronic products, and specifically relates to a USB Type-C docking station EPR converter. Background Technology

[0002] The USB Type-C interface can transmit USB data, video, audio, and power simultaneously. Therefore, since its introduction, the USB Type-C interface has become the mainstream interface technology. The charging and communication connection interfaces of existing power electronic products are gradually moving towards the unified adoption of the USB Type-C interface, and the development of new notebook computer products is also trending towards the adoption of the Type-C interface.

[0003] In order to be compatible with monitors, USB devices and other interfaces with traditional interfaces, a docking station is usually needed to expand the Type-C interface into video, USB, network port or other multiple interfaces to meet the needs of consumers for office and entertainment. At the same time, the docking station can also charge the computer.

[0004] In May 2021, the USB-IF Association released the PD3.1 specification, introducing the concept of EPR (Electronic Power Delivery). This allows charging of computers, monitors, power tools, etc., via a Type-C interface at 28V 5A 140W, 36V 5A 180W, or 48V 5A 240W. In 2021, Apple released a 28V 5A 140W PD3.1 power supply, capable of charging computers at 140W. Other computer manufacturers also announced the development of computers with 28V 5A 140W charging capabilities to meet the needs of high-power power supply and fast charging.

[0005] To keep pace with the development trends of cutting-edge technologies and products in the industry, it is necessary to develop a USB Type-C docking station EPR converter that can transform traditional USB DisplayLink docking stations, DP Alt-mode docking stations, Thunderbolt 3 docking stations, USB4 docking stations, and Thunderbolt 4 docking stations into PD3.1 docking stations. This converter can charge computers at 28V according to the PD3.1 specification while retaining all the original functions of the docking station. At the same time, the converter has a simple and compact structure, the circuit is simplified, and the signal attenuation is minimized. Summary of the Invention

[0006] To address the aforementioned problems in existing technologies, the present invention aims to provide a USB Type-C docking station EPR converter that enables traditional USB DisplayLink docking stations, DP Alt-mode docking stations, Thunderbolt 3 docking stations, USB4 docking stations, and Thunderbolt 4 docking stations to become PD3.1 docking stations. This allows the station to charge computers at 28V according to PD3.1 specifications while retaining all the original functions of the docking station. Furthermore, the structure is simple and compact, the circuitry is minimized, and the signal attenuation is reduced to a minimum.

[0007] The technical solution adopted in this invention is as follows:

[0008] A USB Type-C expansion dock EPR converter includes a PD3.1 processor, wherein the PD3.1 processor is provided with three USB Type-C ports, wherein the first USB Type-C port is used to connect to a computer, the second USB Type-C port is used to connect to the PD3.1 EPR power supply, and the third USB Type-C port is used to connect to a Type-C expansion dock.

[0009] The PD3.1 processor is connected to the second USB Type-C interface via the second Vbus line. The second Vbus line is equipped with a first switch and a step-down circuit. The first switch is controlled by the PD3.1 processor to turn on and off. The step-down circuit is used to step down the Vbus power input from the second USB Type-C interface to a low voltage and connects to the third USB Type-C interface and the PD3.1 processor via the VCC_5V pin.

[0010] A third switch is connected between the VCC_5V pin of the step-down circuit and the third USB Type-C interface. The third switch is also controlled by the PD3.1 processor to turn on and off.

[0011] The high-frequency signal lines of the first USB Type-C interface are connected one-to-one with the corresponding signal lines of the third USB Type-C interface. The P1_CC1 and P1_CC2 pins of the first USB Type-C interface are connected to the P3_CC1 and P3_CC2 pins of the third USB Type-C interface through the PD3.1 processor, so that the PD3.1 processor can control the first USB Type-C interface to communicate with the computer through the P1_CC1 pin and / or the P1_CC2 pin.

[0012] Furthermore, the PD3.1 processor is connected to the P1_CC1 pin of the first USB Type-C interface via the CC1_EN pin, and the PD3.1 processor is connected to the P1_CC2 pin of the first USB Type-C interface via the CC2_EN pin;

[0013] The second USB Type-C interface is connected to the PD3.1 processor via pins P2_CC1 and P2_CC2.

[0014] The third USB Type-C interface is connected to the PD3.1 processor via pins P3_CC1 and P3_CC2.

[0015] The P2_VBUS pin of the second USB Type-C interface is connected to the P1_VBUS pin of the first USB Type-C interface to form the second Vbus line; the step-down circuit is connected to the PD3.1 processor and the P3_VBUS pin of the third USB Type-C interface through the VCC_5V pin.

[0016] The P2_VBUS pin of the third USB Type-C interface is connected to the VCC_5V of the step-down circuit to form the third Vbus line. A third switch is provided on the third Vbus line. The third switch is also connected to the PD3.1 processor and can be controlled by the PD3.1 processor to turn the third switch on and off. The third switch is used to control the power supply status of the third USB Type-C interface.

[0017] Furthermore, the PD3.1 processor is a VL108-Q6 processor.

[0018] Furthermore, the output voltage of the first USB Type-C interface is 28V, which conforms to the EPR specification.

[0019] Furthermore, the step-down circuit is used to step down the Vbus power input from the second USB Type-C interface to a 5V voltage.

[0020] Furthermore, the first USB Type-C interface, the second USB Type-C interface, and the third USB Type-C interface all support PD3.1 communication, which is backward compatible with PD3.0 and PD2.0 communication.

[0021] Furthermore, the first USB Type-C interface, the second USB Type-C interface, and the third USB Type-C interface all support USB mode, DP Alt-mode, and Thunderbolt 3 mode signal modes.

[0022] Furthermore, the second USB Type-C interface is connected to the PD3.1 EPR power supply via a Type-C cable, the third USB Type-C interface is connected to the docking station via a Type-C cable, and the first USB Type-C interface is an integrated coaxial Type-C cable with a built-in cable.

[0023] Furthermore, the step-down circuit is a step-down chip MP2491C.

[0024] Finally, the output power of the third USB Type-C interface is 60-140W.

[0025] The beneficial effects of this invention are as follows:

[0026] A USB Type-C docking station EPR converter uses a VL108-Q6 as the PD3.1 processor. The PD3.1 processor's three USB Type-C ports connect to a computer, a PD3.1 EPR power supply, and the docking station, respectively. The PD3.1 processor controls the switching on and off of the Vbus lines of the PD3.1 EPR power supply and the docking station. The PD3.1 processor requests the same mode from the computer by detecting the docking station's connection status and operating mode. This allows traditional USB DisplayLink docking stations, DPAlt-mode docking stations, Thunderbolt 3 docking stations, USB4 docking stations, and Thunderbolt 4 docking stations to become PD3.1 docking stations. They can charge the computer at 28V according to the PD3.1 specification while retaining all the original functions of the docking station. At the same time, the structure is simple and compact, the product's circuitry is simplified, and the signal transmission attenuation is minimized. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the circuit structure of the USB Type-C docking station EPR converter of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figure 1As shown, in order to solve the technical problem that traditional USB DisplayLink docking stations, DP Alt-mode docking stations, Thunderbolt 3 docking stations, USB4 docking stations, and Thunderbolt 4 docking stations cannot be converted into PD3.1 docking stations and cannot charge computers at 28V according to the PD3.1 specification while retaining all the original functions of the docking station, this invention provides a USB Type-C docking station EPR converter. The overall design scheme is as follows:

[0030] A USB Type-C expansion dock EPR converter is provided. The core structure adopts a PD3.1 processor. The PD3.1 processor is equipped with three USB Type-C ports, wherein the first USB Type-C port is used to connect to a computer, the second USB Type-C port is used to connect to the PD3.1 EPR power supply, and the third USB Type-C port is used to connect to a Type-C expansion dock.

[0031] The PD3.1 processor is connected to the second USB Type-C interface via the second Vbus line. A first switch and a step-down circuit are set on the second Vbus line. The first switch is controlled by the PD3.1 processor to turn on and off. The step-down circuit is used to step down the Vbus power input from the second USB Type-C interface to a low voltage and is connected to the third USB Type-C interface and the PD3.1 processor via the VCC_5V pin.

[0032] A third switch is connected between the VCC_5V pin of the step-down circuit and the third USB Type-C interface. The third switch is also controlled by the PD3.1 processor to turn on and off, thereby controlling the power supply status of the third USB Type-C interface.

[0033] The high-frequency signal lines of the first USB Type-C interface are connected one-to-one with the corresponding signal lines of the third USB Type-C interface. Specifically, the third USB Type-C interface is connected to the P1_RX1 pin of the first USB Type-C interface via the P3_RX1 pin, the third USB Type-C interface is connected to the P1_TX1 pin of the first USB Type-C interface via the P3_TX1 pin, the third USB Type-C interface is connected to the P1_TX2 pin of the first USB Type-C interface via the P3_TX2 pin, the third USB Type-C interface is connected to the P1_RX2 pin of the first USB Type-C interface via the P3_RX2 pin, the third USB Type-C interface is connected to the P1_SBU pin of the first USB Type-C interface via the P3_SBU pin, and the third USB Type-C interface is connected to the P1_USB2 pin of the first USB Type-C interface via the P3_USB2 pin.

[0034] The P1_CC1 and P1_CC2 pins of the first USB Type-C interface are connected to the P3_CC1 and P3_CC2 pins of the third USB Type-C interface through the PD3.1 processor, enabling the PD3.1 processor to control the first USB Type-C interface to communicate with the computer through the P1_CC1 and / or P1_CC2 pins.

[0035] When the PD3.1 processor detects that the third USB Type-C uses the P3_CC1 pin for PD communication, the PD3.1 processor enables CC1_EN and uses the P1_CC1 pin of the first USB Type-C interface for PD communication. When the PD3.1 processor detects that the third USB Type-C uses the P3_CC2 pin for PD communication, the PD3.1 processor enables CC2_EN and uses the P1_CC2 pin of the first USB Type-C interface for PD communication. In this way, high-frequency signals can be transmitted to the third USB Type-C interface in a one-to-one correspondence.

[0036] The PD3.1 processor can select whether to use P1_CC1 or P1_CC2 to communicate with the computer, making it correspond to P3_CC1 and P3_CC2. This allows high-frequency signals to be transmitted to the third USB Type-C interface in a one-to-one correspondence. In this way, the third USB Type-C interface does not need to add a signal multiplexer chip, which can save costs and reduce signal attenuation.

[0037] Furthermore, the PD3.1 processor is connected to the P1_CC1 pin of the first USB Type-C interface via the CC1_EN pin, and the PD3.1 processor is connected to the P1_CC2 pin of the first USB Type-C interface via the CC2_EN pin. The PD3.1 processor can select whether to use P1_CC1 or P1_CC2 to communicate with the computer by controlling CC1_EN and CC2_EN, so that it corresponds to the P3_CC1 and P3_CC2 pins of the third USB Type-C interface.

[0038] The second USB Type-C interface is connected to the PD3.1 processor via pins P2_CC1 and P2_CC2 for communication with the PD3.1 / PD3.0 power adapter, specifically with the PD3.1 EPR power adapter, requesting the adapter to output 28V 5A 140W. The PD3.1 processor communicates with the computer via P1_CC1 or P1_CC2, and then turns on the first switch to supply 28V 5A 140W power to the computer connected to the first USB Type-C interface for charging.

[0039] The third USB Type-C interface is connected to the PD3.1 processor via pins P3_CC1 and P3_CC2. It is used to communicate with the Type-C docking station connected to the third USB Type-C interface to obtain the signal mode required by the Type-C docking station. The PD3.1 processor then communicates with the computer via P1_CC1 or P1_CC2 to request the same signal mode from the computer.

[0040] The second USB Type-C interface is connected to the P1_VBUS pin of the first USB Type-C interface via the P2_VBUS pin; thus forming the second Vbus line, on which the first switch is installed. Figure 1 The circuit consists of a switch 1) and a step-down circuit. The first switch is connected to the PD3.1 processor to control the on and off states, and is used to control whether power is needed to the first USB Type-C interface. The step-down circuit is connected to the PD3.1 processor and the P3_VBUS pin of the third USB Type-C interface via the VCC_5V pin.

[0041] The P2_VBUS pin of the third USB Type-C interface is connected to the VCC_5V of the step-down circuit to form the third Vbus line. A third switch is set on the third Vbus line. Figure 1 The third switch (3) is also connected to the PD3.1 processor and can be controlled by the PD3.1 processor to turn the third switch on and off; the third switch is used to control whether power is needed to the third USB Type-C interface.

[0042] Furthermore, the PD3.1 processor is a VL108-Q6 processor.

[0043] The PD3.1 processor requests the same mode from the computer by detecting the docking station's connection status and operating mode;

[0044] When the second USB Type-C port is connected to a power source, the PD3.1 processor powers on and begins operation. It first checks whether the third Type-C port is connected to a Type-C docking station via P3_CC1 and P3_CC2. If the third Type-C port is connected to a Type-C docking station, the voltage levels on P3_CC1 and P3_CC2 will be pulled low. By comparing the voltage levels of P3_CC1 and P3_CC2, it can be determined which pin is used for PD communication. The PD3.1 processor then turns on the third switch to supply power to the docking station and establishes PD communication with the Type-C docking station via P3_CC1 or P3_CC2 to read which signal modes the Type-C docking station supports.

[0045] If the third USB Type-C interface uses P3_CC1 for PD communication, then the PD3.1 processor will use P1_CC1 for PD communication in preparation for communication with the computer; if it uses P3_CC2 for PD communication, then the PD3.1 processor will use P1_CC2 for PD communication in preparation for communication with the computer. The PD communication pins of the first USB Type-C interface are consistent with those of the third USB Type-C interface, so the third USB Type-C interface can ensure correct signal transmission to the docking station without a signal multiplexer.

[0046] The PD3.1 processor will request the same signal mode from the computer based on the signal mode supported by the Type-C docking station with the third USB Type-C interface (USB mode, DP Alt-mode, Thunderbolt 3 mode).

[0047] The USB mode in this application may include one or more of the following: USB 2.0 signal mode based on USB Type-C interface transmission, USB 3.x high-speed signal mode, USB 4 signal mode, DisplayPort Alt-mode signal mode, and Thunderbolt 3 compatible signal mode. Among them, the USB 4 signal mode can carry tunneled data transmission such as USB 3, DisplayPort, and / or PCIe through a USB 4 link.

[0048] After the second USB Type-C port is connected to a power source, if the first USB Type-C port is connected to the computer first, and the third USB Type-C port is not yet connected to the Type-C docking station, the PD3.1 processor will default to using P1_CC1 for communication with the computer and turn on the second switch to charge the computer. Once the P3 port is connected to the Type-C docking station, the PD3.1 processor first reads the PD communication pin information of the third USB Type-C port and its supported signal modes. Then, it controls CC1_EN to disconnect P1_CC1. Next, depending on the PD communication pin information of the third USB Type-C port, it enables CC1_EN or CC2_EN, allowing the first USB Type-C port to use the PD communication pins corresponding to the third USB Type-C port, and then requests the same signal mode from the computer as the third USB Type-C port.

[0049] Furthermore, the first USB Type-C interface outputs 28V to meet EPR specifications.

[0050] Furthermore, the step-down circuit is used to step down the Vbus power supply input from the second USB Type-C interface to a 5V voltage.

[0051] Furthermore, the first, second, and third USB Type-C ports all support PD3.1 communication, which is backward compatible with PD3.0 and PD2.0 communication.

[0052] The first and third USB Type-C ports support multiple signal modes, including: USB mode, DP Alt-mode, Thunderbolt 3 mode and USB4 mode.

[0053] Furthermore, the first USB Type-C interface and the third USB Type-C interface also support standard USB mode communication, DP Alt-mode communication, Thunderbolt 3 mode communication and USB4 mode communication.

[0054] Furthermore, the second USB Type-C port is connected to the PD3.1 EPR power supply via a Type-C cable, the third USB Type-C port is connected to the Type-C docking station via a Type-C cable, and the first USB Type-C port is an integrated coaxial Type-C cable with a built-in cable. Using a coaxial cable can reduce signal attenuation.

[0055] Finally, the third USB Type-C port has an output power of 60–140W. The step-down circuit is the MP2491C step-down chip.

[0056] The USB Type-C docking station EPR converter of this invention uses VL108-Q6 as a PD3.1 processor. The three USB Type-C ports of the PD3.1 processor are respectively connected to the computer, the PD3.1 EPR power supply, and the docking station. The PD3.1 processor controls the switching on and off of the Vbus lines of the PD3.1 EPR power supply and the Vbus lines of the docking station. The PD3.1 processor requests the same mode from the computer by detecting the connection status and working mode of the docking station. It can turn traditional USB DisplayLink docking stations, DP Alt-mode docking stations, Thunderbolt 3 docking stations, USB4 docking stations, and Thunderbolt 4 docking stations into PD3.1 docking stations. It can charge the computer at 28V according to the PD3.1 specification, while retaining all the original functions of the docking station. At the same time, the structure is simple and compact, the circuit of the product is simplified, and the attenuation of signal transmission is minimized.

[0057] By using the PD3.1 processor VL108-Q6, one processor can handle PD communication from three Type-C interfaces, converting PD3.0 and PD2.0 communication into PD3.1 communication to enable 28V charging for computers. According to the USB Type-C specification, the Type-C female connector requires a multiplexer to handle reversible connections. This invention, through clever design, eliminates the need for the multiplexer on the Type-C signal line, reducing signal attenuation. Simultaneously, the Type-C interface connecting to the computer is designed with a shorter coaxial cable, minimizing signal attenuation.

[0058] like Figure 1 As shown, this invention is a USB Type-C docking station EPR converter that can transform traditional USB DisplayLink docking stations, DP Alt-mode docking stations, Thunderbolt 3 docking stations, USB4 docking stations, and Thunderbolt 4 docking stations into PD3.1 EPR docking stations. It can charge computers at 28V according to the PD3.1 EPR specification while retaining all the original functions of the docking station.

[0059] This invention uses the VL108-Q6 as the PD3.1 processor. The VL108 supports PD communication via three USB Type-C ports. The first USB Type-C port (P1) connects to the computer; the second USB Type-C port (P2) connects to the PD power supply (specifically, a PD3.1 EPR power supply); and the third USB Type-C port connects to a Type-C docking station. All three ports support PD3.1, PD3.0, and PD2.0 communication. The first and third USB Type-C ports support multiple signal modes, including USB mode, DPAlt-mode, Thunderbolt 3 mode, and USB4 mode. This invention retains all the functions of a traditional docking station while simultaneously charging a PD3.1 computer at 28V according to the EPR specification, transforming a traditional docking station into a PD3.1 EPR docking station.

[0060] From the perspective of product characteristics, if the second USB Type-C interface P2 of this invention is not connected to the PD3.1 EPR power supply, then this invention would be meaningless. Therefore, this invention is designed so that the second USB Type-C interface P2 does not work if it is not connected to a power supply. This simplifies the product's operating logic, requiring only the first switch to be retained on the Vbus line. Figure 1 Switch 1 is sufficient; it is controlled by the PD3.1 processor VL108-Q6 to turn on or off. There is no need to add switch 2 to the second USB Type-C interface P2, saving costs and reducing wear.

[0061] A step-down chip MP2491C capable of handling 28V input is added to the Vbus line of the second USB Type-C interface P2 in this invention to convert the Vbus power supply to 5V for use by the chip of this invention and the third USB Type-C interface P3. Since the third USB Type-C interface P3 is a USB Type-C output interface, a third switch needs to be added to the Vbus line of the third USB Type-C interface P3, i.e. Figure 1 Switch 3 in the circuit conforms to the Type-C specification and is controlled to be turned on or off by the PD3.1 processor VL108-Q6.

[0062] According to the Type-C specification, the Type-C male connector can be connected to the Type-C female connector either way, requiring a multiplexer within the Type-C female connector to switch between the correct and reverse connections. This invention, however, cleverly removes the multiplexer from the Type-C female connector of the third USB Type-C interface. PD communication is achieved by switching between P1_CC1 and P1_CC2 of the first USB Type-C interface, allowing the computer-side multiplexer to handle the correct connection. The specific method is as follows:

[0063] When the second USB Type-C interface P2 of this invention is connected to a power source, the PD3.1 processor is powered on and begins to work. It first checks whether the third Type-C interface is connected to a Type-C docking station via P3_CC1 and P3_CC2. If the third Type-C interface is connected to a docking station, the voltage levels on P3_CC1 and P3_CC2 will be pulled low. By comparing the voltage levels of P3_CC1 and P3_CC2, it can be determined which pin is used for PD communication. The PD3.1 processor turns on the third switch to supply power to the docking station and performs PD communication with the docking station via P3_CC1 or P3_CC2 to read which signal modes the docking station supports.

[0064] If the third USB Type-C interface uses P3_CC1 for PD communication, then the PD3.1 processor will use P1_CC1 for PD communication in preparation for communication with the computer; if it uses P3_CC2 for PD communication, then the PD3.1 processor will use P1_CC2 for PD communication in preparation for communication with the computer. The PD communication pins of the first USB Type-C interface are consistent with those of the third USB Type-C interface, so the third USB Type-C interface can ensure correct signal transmission to the docking station without a signal multiplexer.

[0065] The PD3.1 processor will request the same signal mode from the computer based on the signal mode supported by the third USB Type-C interface docking station (USB mode, DP Alt-mode, Thunderbolt 3 mode, USB4 mode).

[0066] After the second USB Type-C port is connected to power, if the first USB Type-C port is connected to the computer first, and the third USB Type-C port is not yet connected to the docking station, the PD3.1 processor will default to using P1_CC1 for communication with the computer and turn on the second switch to charge the computer. Once the P3 port is connected to the docking station, the PD3.1 processor first reads the PD communication pin information of the third USB Type-C port and its supported signal modes. Then, it controls CC1_EN to disconnect P1_CC1. Next, depending on the PD communication pin information of the third USB Type-C port, it enables CC1_EN or CC2_EN, allowing the first USB Type-C port to use the PD communication pins corresponding to the third USB Type-C port, and then requests the same signal mode from the computer as the third USB Type-C port.

[0067] The design scheme presented above simplifies the circuitry in terms of hardware, reducing power consumption and signal attenuation. The firmware incorporates various operating modes and connection scenarios for both the docking station and the computer, executing corresponding actions to make the docking station function as if directly connected to the computer, ensuring all its functions work correctly.

[0068] The invention described above can transform traditional USB DisplayLink docking stations, DP Alt-mode docking stations, Thunderbolt 3 docking stations, USB4 docking stations, and Thunderbolt 4 docking stations into EPR docking stations. These stations can charge computers at 28V according to the PD3.1 EPR specification while retaining all the original functions of the docking station.

[0069] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A USB Type-C docking station EPR converter, characterized in that: It includes a PD3.1 processor, which has three USB Type-C ports. The first USB Type-C port is used to connect to a computer, the second USB Type-C port is used to connect to the PD3.1 EPR power supply, and the third USB Type-C port is used to connect to a Type-C docking station. The PD3.1 processor is connected to the second USB Type-C interface via the second Vbus line. The second Vbus line is equipped with a first switch and a step-down circuit. The first switch is controlled by the PD3.1 processor to turn on and off. The step-down circuit is used to step down the Vbus power input from the second USB Type-C interface to a low voltage and connects to the third USB Type-C interface and the PD3.1 processor via the VCC_5V pin. A third switch is connected between the VCC_5V pin of the step-down circuit and the third USB Type-C interface. The third switch is also controlled by the PD3.1 processor to turn on and off. The high-frequency signal lines of the first USB Type-C interface are connected one-to-one with the corresponding signal lines of the third USB Type-C interface. The P1_CC1 and P1_CC2 pins of the first USB Type-C interface are connected to the P3_CC1 and P3_CC2 pins of the third USB Type-C interface through the PD3.1 processor, so that the PD3.1 processor can control the first USB Type-C interface to communicate with the computer through the P1_CC1 pin and / or the P1_CC2 pin. The PD3.1 processor is connected to the P1_CC1 pin of the first USB Type-C interface via the CC1_EN pin, and the PD3.1 processor is connected to the P1_CC2 pin of the first USB Type-C interface via the CC2_EN pin. The second USB Type-C interface is connected to the PD3.1 processor via pins P2_CC1 and P2_CC2. The third USB Type-C interface is connected to the PD3.1 processor via pins P3_CC1 and P3_CC2. The P2_VBUS pin of the second USB Type-C interface is connected to the P1_VBUS pin of the first USB Type-C interface to form the second Vbus line; the step-down circuit is connected to the PD3.1 processor and the P3_VBUS pin of the third USB Type-C interface through the VCC_5V pin. The P2_VBUS pin of the third USB Type-C interface is connected to the VCC_5V of the step-down circuit to form the third Vbus line, and the third switch is set on the third Vbus line; the third switch is also connected to the PD3.1 processor and can be controlled by the PD3.1 processor to turn the third switch on and off; the third switch is used to control the power supply status of the third USB Type-C interface; The first, second, and third USB Type-C ports all support USB mode, DP Alt-mode, and Thunderbolt 3 mode signal modes.

2. The USB Type-C docking station EPR converter according to claim 1, characterized in that: The PD3.1 processor is a VL108-Q6 processor.

3. The USB Type-C docking station EPR converter according to claim 1, characterized in that: The first USB Type-C interface outputs 28V to meet EPR specifications.

4. The USB Type-C docking station EPR converter according to claim 1, characterized in that: The step-down circuit is used to step down the Vbus power input from the second USB Type-C interface to a 5V voltage.

5. The USB Type-C docking station EPR converter according to claim 1, characterized in that: The first, second, and third USB Type-C interfaces all support PD3.1 communication, which is backward compatible with PD3.0 and PD2.0 communication.

6. The USB Type-C docking station EPR converter according to claim 1, characterized in that: The second USB Type-C interface is connected to the PD3.1 EPR power supply via a Type-C cable, the third USB Type-C interface is connected to the docking station via a Type-C cable, and the first USB Type-C interface is an integrated coaxial Type-C cable with a built-in cable.

7. The USB Type-C docking station EPR converter according to claim 1, characterized in that: The step-down circuit is a step-down chip MP2491C.

8. The USB Type-C docking station EPR converter according to claim 2, characterized in that: The output power of the third USB Type-C interface is 60-140W.

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