Data line self-checking device

Abstract

The utility model discloses a data line self-checking device, which comprises a power supply unit, a power supply conversion unit, a bidirectional protocol control unit, a first interface and a second interface, the power unit is connected with the power conversion unit; the power conversion unit is connected with the first interface; the power supply unit is connected with the bidirectional protocol control unit; the bidirectional protocol control unit is connected with the second interface; two ends of the data line are respectively connected with the first interface and the second interface. By implementing the device provided by the utility model, the self-inspection of the wire harness in charging connection can be realized, the comprehensive high-performance charging experience from enhancing the safety, optimizing the charging efficiency and preventing overheating and fire accidents is ensured, and the rapid and stable safe charging is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to data line technical field especially relates to a data line self -checking device. BACKGROUND

[0002] Most of the chargers and adapters on the current market, whether equipped with 1A, 2C interface or other types of USB interface, the main function is limited to providing power output for mobile phones and other devices. The A or C port of the USB of these devices usually only has output function, lacks input detection capability. This means that they cannot assess the status of the connected data line, such as internal resistance size, voltage drop, etc., thus leading to a series of problems, such as the quality of data lines on the market is uneven, from inferior to superior, the price difference can reach more than 100 times, users often have difficulty in judging whether the data line used is suitable for high-power charging. When 35W to 300W high-power chargers are used with low-quality data lines, not only will it lead to low charging efficiency, but also may cause fire risk due to overheating. In some cases, poor data lines may prevent the charging process, and even damage the charged devices, such as smartphones, tablets or laptops.

[0003] Therefore, it is necessary to design a new device to realize self-checking of the wire harness connected for charging, to ensure all-round high-performance charging experience from enhancing safety, optimizing charging efficiency to preventing overheating and fire accidents, and to realize fast and stable safe charging. SUMMARY

[0004] The utility model aims at overcoming the defects of prior art, provides a data line self -checking device.

[0005] To solve the above technical problems, the utility model aims at realizing the following technical scheme: provide a data line self -checking device, include: power supply unit, power supply conversion unit, two-way protocol control unit, first interface and second interface, power supply unit with power supply conversion unit connects, power supply conversion unit with first interface connects, power supply unit with two-way protocol control unit connects, two-way protocol control unit with second interface connects, the both ends of data line are connected first interface and second interface respectively, power supply conversion unit with two-way protocol control unit connects.

[0006] Its further technical scheme is that the power supply unit includes AD-DC charger.

[0007] Its further technical scheme is that the power supply conversion unit includes BUCK chip with fast charging protocol integrated.

[0008] Further technical solutions are as follows: the bidirectional protocol control unit comprises a PD bidirectional protocol control chip, a BUCK-BOOST converter and a switch piece, the PD bidirectional protocol control chip is connected with the BUCK-BOOST converter and the second interface respectively; the BUCK-BOOST converter is connected with the switch piece, the BUCK chip and the second interface respectively, and the switch piece is connected with the BUCK chip and the second interface respectively.

[0009] Further technical solutions are as follows: the first interface comprises a TYPE-C interface.

[0010] Further technical solutions are as follows: the second interface comprises a TYPE-C interface.

[0011] Further technical solutions are as follows: further comprising a control unit and a display module, and the control unit is connected with the power conversion unit and the display module respectively.

[0012] Further technical solutions are as follows: the switch piece comprises a MOS tube.

[0013] Further technical solutions are as follows: the display module comprises a display screen.

[0014] Further technical solutions are as follows: the BUCK chip is connected with the first interface through a resistor.

[0015] The beneficial effects of the utility model compared with the prior art are as follows: the utility model integrates a power unit, a power conversion unit, a bidirectional protocol control unit, a control unit, a display module, a first interface and a second interface, when a user inserts data lines at two ends into the first interface and the second interface respectively, the power unit supplies power to the system and adjusts voltage through the power conversion unit, compatibility with connected equipment is ensured, the bidirectional protocol control unit is responsible for coordinating a fast charging protocol, and optimal power transmission is realized; the control unit monitors the whole process, evaluates data line quality by detecting voltage differences between input and output, and results are directly presented to the user through the display module, self-checking of a wire harness of a charging connection is realized, and omnibearing high-performance charging experience from enhanced safety, optimized charging efficiency to prevention of overheating and fire accidents is ensured, and safe charging is realized quickly and stably.

[0016] The utility model is further described below in combination with the drawings and specific embodiments. DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0018] Figure 1 A schematic block diagram of a data line self-checking device provided by the present application is shown in the figure.

[0019] Figure 2 A specific circuit schematic diagram of a data line self-checking device provided by the present application is shown in the figure.

[0020] Figure 3 A principle schematic diagram of a data line self-checking device provided by the present application is shown in the figure.

[0021] Explanation of the figure:

[0022] 10, power supply unit; 20, power supply conversion unit; 30, bidirectional protocol control unit; 40, control unit; 50, display module; 60, first interface; 70, second interface. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0025] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should be further understood that the term "and / or" used in the description and claims of the present application refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0027] Most current chargers and adapters lack input detection function for connecting data lines, and cannot assess the quality and electrical performance of the data lines. Due to the uneven quality of data lines on the market, users have difficulty in determining whether they are suitable for high-power charging, which may lead to low charging efficiency or equipment damage. Low-quality data lines may cause overheating or even fire risk when used under high-power chargers. Devices lacking input detection function cannot effectively avoid these safety hazards, affecting the reliability and safety of the charging process.

[0028] To this end, the utility model embodiment provides a data line self-checking device, which realizes self-checking of the wire harness of the charging connection, ensures all-round high-performance charging experience from enhancing safety, optimizing charging efficiency to preventing overheating and fire accidents, and realizes fast and stable safe charging.

[0029] Specifically, the data line self-checking device provides stable power supply through the power supply unit 10 and the power supply conversion unit 20, and provides voltage signals for the detection process. The bidirectional protocol control unit 30 coordinates the current flow direction and ensures the circuit closure through the switch piece, starts the self-checking process, and detects the connection performance of the data line. The power supply conversion unit 20 evaluates the charging capacity and performance of the data line according to the voltage difference in the closed loop combined with the known standard. The performance data is transmitted to the display module 50 through the control unit 40, real-time feedback is provided, and the health status and charging efficiency of the data line are displayed. Through this self-checking process, the charging connection is stable, the charging efficiency is optimized, the overheating and fire hazards are reduced, and the charging safety and reliability are improved.

[0030] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the drawings in the specification and specific embodiments.

[0031] Please refer to Figure 1 , Figure 1 The utility model embodiment provides a schematic block diagram of a data line self-checking device, which can be used in a charger to realize self-checking of the wire harness of the charging connection, ensure all-round high-performance charging experience from enhancing safety, optimizing charging efficiency to preventing overheating and fire accidents, and realize fast and stable safe charging.

[0032] The data line self-checking device comprises a power supply unit 10, a power supply conversion unit 20, a bidirectional protocol control unit 30, a control unit 40, a display module 50, a first interface 60, and a second interface 70. The power supply unit 10 is connected with the power supply conversion unit 20. The power supply conversion unit 20 is connected with the first interface 60. The power supply unit 10 is connected with the bidirectional protocol control unit 30. The bidirectional protocol control unit 30 is connected with the second interface 70. The control unit 40 is connected with the power supply conversion unit 20 and the display module 50 respectively. The two ends of the data line are connected with the first interface 60 and the second interface 70 respectively. The power supply conversion unit 20 is connected with the bidirectional protocol control unit 30.

[0033] In this embodiment, there are two main forms of data lines:

[0034] The data line with a double-ended TYPE-C interface is suitable for connecting two devices supporting the TYPE-C interface.

[0035] The data line with one end as a TYPE-A interface and the other end as a TYPE-C interface is suitable for connecting traditional USB devices with new TYPE-C devices.

[0036] The device of this embodiment is implemented based on the following principles:

[0037] During the charging process, the protocol chip is responsible for monitoring and managing the voltage and current. For the data line with a double-ended TYPE-C interface, when the two ends are connected, the protocol chip can provide a specific voltage (such as 5V or 9V) and monitor the loop state that passes through the cable to the other end and returns to the protocol chip. This process involves the following steps:

[0038] First, as shown in Figure 3 , the protocol chip detects whether a complete loop is formed between the A end and the B end. Only when the loop is confirmed to be established, the self-checking program will be started.

[0039] Once the loop is established, the system will select a fixed current value (for example, in the range of 0.5-3A) for testing and apply the corresponding voltage (such as 5V).

[0040] Since a fixed current value is selected, according to Ohm's law (U=I*R), the resistance value of the wire harness can be calculated by measuring the voltage difference between the A end and the B end. Different quality of wire harnesses will result in different resistance values, which in turn affect the final voltage at the B end.

[0041] By comparing the voltage difference between the A end and the B end or directly measuring the resistance size, the protocol IC can evaluate the state of the wire harness and determine whether it is suitable for the current charging requirements.

[0042] Specifically, the evaluation of wire harness quality is based on its maximum working current and corresponding internal resistance, usually represented by AWG (American Wire Gauge) specifications. Here are the specific evaluation methods for wire harnesses of different grades:

[0043] Using a wire harness with AWG17 specifications, the design working current exceeds 4.1A, and the internal resistance is 16.3Ω / Km. For a one-meter long wire harness, under the condition of 5V / 3A, the voltage measured at B should be close to 4.951V or higher in ideal conditions. This indicates that the wire harness has low resistance characteristics and is the best choice.

[0044] For a wire harness with AWG18 specifications, the working current range is above 3.2A, and the internal resistance is 21.4Ω / Km. Under the same conditions, if the voltage measured at B is between 4.938V and 4.950V, the wire harness is considered to be of ordinary grade.

[0045] AWG19 specification wire harness, suitable for working current above 2.6A, internal resistance is 26.9Ω / Km. If the B end voltage is lower than 4.919V or between 4.919V and 4.937V, it indicates that the wire harness quality is poor and may not be suitable for high-performance charging needs.

[0046] In summary, the device of the present embodiment realizes effective self-checking of the charging wire harness through precise voltage, current control and impedance measurement technology, ensuring safe and efficient charging experience. At the same time, through clear evaluation criteria, users can easily identify the quality grade of the wire harness and choose the most suitable charging accessories for their own devices.

[0047] Specifically, the power supply unit 10 provides stable and safe AC-DC conversion, suitable for input voltage range of 96V-240V. It powers the entire system and ensures that the output voltage is suitable for downstream components.

[0048] The power conversion unit 20 is responsible for adjusting the power provided by the power supply unit 10 to an appropriate level to support the needs of other circuits, especially the operation of the bidirectional protocol control unit 30. It also calculates the pressure difference value by detecting the relevant voltage values during the self-checking process and transmits the results to the control unit 40.

[0049] The bidirectional protocol control unit 30 contains one or more protocol chips (such as PD, QC, AFCS, etc.), as well as a BUCK or BUCK-BOOST converter. It can communicate with external devices through the TYPE-C interface, identify and respond to various fast charging protocols. For TYPE-C2 port, it has bidirectional function, which can be used as input and output.

[0050] The control unit 40 is composed of a single chip, which receives the results and feeds back to the display module 50.

[0051] The test results are intuitively shown to the user through the LED or other forms of display. For example, different color or pattern of LED lights can be used to represent the status of the data line (best, general, poor).

[0052] The first interface 60 (TYPE-C1) and the second interface 70 (TYPE-C2) allow the data line to be tested to be connected to the self-test device. They are designed in accordance with the USB Type-C standard and can correctly map the internal pins to the corresponding protocol chip pins to facilitate the execution of the handshake protocol.

[0053] In an embodiment, the power supply unit 10 described above includes an AD-DC charger, and in this embodiment, the power supply unit 10 is mainly composed of an AC-DC charger designed to accept a wide range of AC input voltage, i.e. AC 96V-240V. This wide range of input voltage makes the charger suitable for different regions of the world power standards. The main task of the AC-DC charger is to convert AC to DC to provide the necessary power support for the entire self-test device.

[0054] The AC-DC charger accesses the entire device through Figure 2 The connection point marked as VIN is the energy inlet of the entire circuit, ensuring that the power from the external power grid can be safely and stably transmitted to the subsequent modules. In order to achieve efficient energy conversion, advanced power conversion technology is used inside the AC-DC charger, such as using high-frequency switching mode power supply to improve efficiency and reduce volume.

[0055] In an embodiment, please refer to Figure 2 The power conversion unit 20 described above includes a BUCK chip with integrated fast charging protocol. The BUCK chip with integrated fast charging protocol not only performs the function of step-down (i.e. from a higher input voltage to a lower output voltage), but also has built-in support for multiple fast charging protocols, such as PD (Power Delivery), QC (Quick Charge), AFCS (Adaptive Fast Charging System), FCP (Fast Charging Protocol), SCP (Super Charge Pump), PPS (Programmable Power Supply), etc. This means that when the TYPE-C1 or TYPE-C2 port is connected to a device that supports these protocols, it can automatically identify the supported protocol of the other party and negotiate the most appropriate charging parameters, such as voltage and current level.

[0056] Specifically, when an external power source is connected to VIN, it is converted into a DC voltage suitable for system operation by the AC-DC charger. This DC voltage is transmitted to the BUCK chip in the power conversion unit 20. According to the requirements of the actual application scenario, the BUCK chip will adjust its output voltage to an appropriate value to meet the requirements of the downstream load. If a device that supports fast charging protocols is connected, the BUCK chip will communicate with it through the TYPE-C interface and set the optimal charging conditions according to the protocols recognized by both parties.

[0057] During self-test, the BUCK chip also participates in the construction of the test loop, helping to measure the resistance of the data line and evaluate its quality.

[0058] In an embodiment, referring to Figure 2 The above-mentioned bidirectional protocol control unit 30 includes a PD bidirectional protocol control chip, a BUCK-BOOST converter, and a switching component. The PD bidirectional protocol control chip is connected to the BUCK-BOOST converter and the second interface 70, respectively. The BUCK-BOOST converter is connected to the switching component, the BUCK chip, and the second interface 70, respectively. The switching component is connected to the BUCK chip and the second interface 70, respectively.

[0059] In this embodiment, the PD bidirectional protocol control chip supports bidirectional power transmission, that is, it can not only receive power from an external power source but also output power to other devices. This chip is connected to the BUCK-BOOST converter and the second interface 70, respectively, and exchanges data through a high-speed communication bus to achieve intelligent power management. For example, when the self-test device is used as a charger to charge other devices, or when power needs to be obtained from an external power source, the PD bidirectional protocol control chip plays a key role.

[0060] The BUCK-BOOST converter is a DC-DC converter that can raise or lower the input voltage to different levels. It is not only connected to the PD bidirectional protocol control chip but also connected to the switching component, the BUCK chip, and the second interface 70. This design allows the BUCK-BOOST converter to adjust its output voltage according to the actual situation to meet the needs of the downstream load. When a higher voltage is needed, it performs a step-up operation; when a lower voltage is needed, it performs a step-down operation. In addition, since it is connected to the BUCK chip, the two can work together to optimize the energy conversion efficiency of the entire system.

[0061] The switch is an important component in the circuit, used to control the selection of the current path. It is connected to the BUCK chip and the second interface 70, allowing the system to choose the most suitable power path according to actual needs. For example, in some cases, it may be necessary to directly use the power from the AC-DC charger, while in other cases, the power after BUCK-BOOST conversion is more suitable for the current task. The presence of the switch increases the flexibility of the system, allowing it to quickly switch between different modes.

[0062] When the system works as a charger, the PD bidirectional protocol control chip first establishes a connection with external devices and determines the best charging parameters through negotiation. According to the negotiation results, the BUCK-BOOST converter adjusts its output voltage to ensure that the power provided to external devices is both safe and efficient.

[0063] If it is necessary to change the power path or adjust the output voltage, the switch will act under the instruction of the PD bidirectional protocol control chip, selecting the appropriate circuit configuration. During self-test, the BUCK-BOOST converter also participates in the test loop, helping to evaluate parameters such as data line resistance, ensuring the normal operation of the overall system.

[0064] Through such design, the bidirectional protocol control unit 30 not only realizes good compatibility with different types of devices, but also improves the energy conversion efficiency while enhancing the reliability and safety of the system. In addition, the integrated solution helps to reduce the space occupation on the PCB, which is conducive to the miniaturization design of the product, and also simplifies the wiring and reduces the production cost.

[0065] In an embodiment, please refer to Figure 2 The first interface 60 described above includes a TYPE-C interface, specifically a type-c1 interface.

[0066] In an embodiment, please refer to Figure 2 The second interface 70 described above includes a TYPE-C interface, specifically a type-c2 interface.

[0067] The first interface 60 is a type-c1 interface, used to receive power input or data transmission from external power sources. This interface is compatible with the USB Power Delivery (PD) protocol, supporting fast charging and other advanced functions.

[0068] The second interface 70 is a type-c2 interface, responsible for providing power output or data exchange to external devices. Similarly, it also follows the TYPE-C standard and can be compatible with various types of terminal devices, ensuring a wide range of applications.

[0069] In an embodiment, please refer to Figure 2The display module 50 mentioned above includes a display screen.

[0070] In an embodiment, referring to Figure 2 The switch mentioned above includes a MOS transistor Q1. MOS transistor is a type of field-effect transistor that functions as a switch in electrical circuits, controlling the selection of current paths to switch between different operating modes.

[0071] In an embodiment, referring to Figure 2 The display module 50 mentioned above also includes an LED light.

[0072] The display screen is used to visually present system status, setting options, and other information to the user. This allows the user to easily monitor and manage the operating parameters of the device.

[0073] The LED light serves as an auxiliary indicator device, conveying critical status information such as power connection status, charging progress, etc. in a simple and direct manner. This visual feedback is crucial for enhancing user experience.

[0074] Specifically, referring to Figure 2 The BUCK chip is connected to the first interface 60 through a resistor RCS1; the BUCK-BOOST converter is connected to the second interface 70 through a resistor RCS2; and the MOS transistor Q1 is connected to the second interface 70 through a resistor RS.

[0075] The BUCK chip is connected to the first interface 60 (i.e. type-c1) through a resistor RCS1. The resistor RCS1 here serves as a current limiter, protecting the circuit from overload damage while also helping to stabilize the input voltage, ensuring the normal operation of the BUCK chip.

[0076] The BUCK-BOOST converter is connected to the second interface 70 (i.e. type-c2) through a resistor RCS2. Similarly, the resistor RCS2 helps to adjust and stabilize the output voltage, ensuring the safety and reliability of power supply to external devices.

[0077] The MOS transistor Q1 is connected to the second interface 70 through a resistor RS. The resistor RS not only helps to control the working state of the MOS transistor, but also provides necessary electrical isolation to prevent possible short circuits or other abnormal situations from affecting the entire system.

[0078] Referring to Figure 2 , the single-chip microcomputer in the figure refers to the control unit 40, and the working process of the entire device is as follows:

[0079] The AC 96V-240V AC-DC charger identified by VIN is connected to the type-c1 interface through a BUCK chip (supporting PD, QC, AFCS, FCP, SCP, PPS, etc. protocols). Specifically, the 5, 6, 7, 8, 9 pins of the type-c1 interface are connected to the CCA1, CCA2, DPA, DMA pins of the BUCK chip, respectively, for handshaking with the corresponding protocols on the mobile phone or computer side, so that the BUCK chip can control the AC-DC charger to output corresponding voltage and current.

[0080] The same mechanism also applies to the type-c2 interface, but it has a bidirectional protocol function, so it can not only act as an output port to power external devices, but also receive power input. The 5, 6, 7, 8, 9 pins of the type-c2 interface are connected to the CCB1, CCB2, DPB, DMB pins of the PD bidirectional protocol chip, realizing data exchange and power management with external devices.

[0081] When both the type-c1 interface and the type-c2 interface are connected with TYPE-C data lines, the self-checking line function is activated to evaluate the quality of the data lines. At this time, VOUT1 is connected to VOUT2 through the 3, 4, 11, 12 pins of the type-c1 interface and the 3, 4, 13, 14 pins of the type-c2 interface. Next, the BUCK chip sends a level signal to trigger MOS tube Q1 to open and short to ground. This allows current to flow back to the VOUT2 pin of the BUCK chip through the ground of VOUT2, while VOUT1 is connected to the VIN pin of the BUCK chip, forming a complete current loop.

[0082] In this process, the BUCK chip detects the voltage difference between VOUT1 and VOUT2 (i.e. the voltage difference = VOUT1-VOUT2), and judges the state of the data line through a pre-set voltage difference and resistance calculation method, including best, general or poor. According to the judgment result, the BUCK chip transmits information to the corresponding pins of the control unit 40 through the SCL and SDA pins, and finally displays the evaluation result of the data line quality in a visual form through the I / O interface of the LED lamp or display screen.

[0083] Through the above design, the device not only can efficiently manage and distribute power, but also can accurately evaluate the quality of the connected data line without relying on external devices, providing instant feedback to users. This design not only improves the intelligence of the system, but also brings great convenience to users.

[0084] In the embodiment, the model of the BUCK chip is SW3561 but not limited to; the model of the single-chip microcomputer is MC9959 but not limited to; the model of the BUCK-BOOST converter is SW3203 but not limited to; and the model of the PD bidirectional protocol control chip is SW2505 but not limited to.

[0085] The data line self-checking device, by integrating the power supply unit 10, the power supply conversion unit 20, the bidirectional protocol control unit 30, the control unit 40, the display module 50, the first interface 60 and the second interface 70, when the user inserts the data line at both ends into the first interface 60 and the second interface 70 respectively, the power supply unit 10 supplies power to the system and adjusts the voltage through the power supply conversion unit 20 to ensure compatibility with the connected device, while the bidirectional protocol control unit 30 is responsible for coordinating the fast charging protocol to achieve optimal power transmission. The control unit 40 monitors the entire process and evaluates the data line quality by detecting the voltage difference between the input and output, and the result is intuitively presented to the user through the display module 50, realizing self-checking of the charging connection harness, ensuring a full range of high-performance charging experience from enhanced safety, optimized charging efficiency to prevention of overheating and fire accidents, realizing fast and stable safe charging.

[0086] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A data line self-test apparatus, characterized by, It comprises: a power supply unit, a power supply conversion unit, a bidirectional protocol control unit, a first interface and a second interface; the power supply unit is connected with the power supply conversion unit; the power supply conversion unit is connected with the first interface; the power supply unit is connected with the bidirectional protocol control unit; the bidirectional protocol control unit is connected with the second interface; two ends of a data line are respectively connected with the first interface and the second interface; the power supply conversion unit is connected with the bidirectional protocol control unit.

2. The data line self-test device of claim 1, wherein, The power supply unit comprises an AD-DC charger.

3. The data line self-test device of claim 1, wherein, The power supply conversion unit comprises a BUCK chip integrated with a fast charging protocol.

4. The data line self-test device of claim 3, wherein, The bidirectional protocol control unit comprises a PD bidirectional protocol control chip, a BUCK-BOOST converter and a switch piece; the PD bidirectional protocol control chip is connected with the BUCK-BOOST converter and the second interface respectively; the BUCK-BOOST converter is connected with the switch piece, the BUCK chip and the second interface respectively; the switch piece is connected with the BUCK chip and the second interface respectively.

5. The data line self-test device of claim 1, wherein, The first interface comprises a TYPE-C interface.

6. The data line self-test device of claim 1, wherein, The second interface comprises a TYPE-C interface.

7. The data line self-test device of claim 1, wherein, It further comprises: a control unit and a display module; the control unit is connected with the power supply conversion unit and the display module respectively.

8. The data line self-test device of claim 4, wherein, The switch piece comprises a MOS tube.

9. The data line self-test device of claim 7, wherein, The display module comprises a display screen.

10. The data line self-test device of claim 3, wherein, The BUCK chip is connected with the first interface through a resistor.

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