USB-C interface equipment and USB-C interface system

Abstract

The invention provides a USB-C interface device and a USB-C interface system. The USB-C interface device comprises a power transmission chip, a USB-C interface module and a USB-C interface module, the USB-C connector is in communication connection with the power transmission chip; in the power input line receiving module, a first output end of a first switch structure is electrically connected with a USB-C connector through a power input line, a second output end of the first switch structure is electrically connected with a first end of a first voltage dividing structure, and a second end of the first voltage dividing structure is electrically connected with the first output end of the first switch structure; the first end of the second voltage dividing structure is electrically connected with the first end of the first voltage dividing structure, and the second end of the second voltage dividing structure is grounded; when the USB-C interface equipment is in a charging state in a standard power range, the input end and the first output end of the first switch structure are conducted; and when the USB-C interface equipment is in an extended power range charging state, the input end of the first switch structure is conducted with the second output end.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a USB-C interface device and a USB-C interface system. Background Art

[0002] Currently, the USB-C (Universal Serial Bus Type-C) interface is the main interface for laptops and mobile phones. The promotion of EPR (extended power range) has increased the Vbus (power input line) voltage on the USB-C interface from the previous maximum of 20V to a maximum of 48V. The increase in voltage has brought many challenges to the system design of the USB-C interface. The most important one is the voltage resistance of the USB-C PD (Power Delivery) control chip.

[0003] Since Vbus will be connected to the PD controller, the PD controller is required to withstand the high voltage of Vbus. In the case of SPR (standard power range), the Vbus pin of the PD controller needs to withstand a voltage of no less than 24V (20V+20%); in the case of EPR, the Vbus pin of the PD controller needs to withstand a voltage of no less than 55V (48V+20%). If the PD controller wants to improve the voltage resistance of the Vbus pin, it must adopt a higher voltage resistance process, which will greatly increase the cost of the chip. Summary of the invention

[0004] The main purpose of this application is to provide a USB-C interface device and a USB-C interface system to at least solve the problem of high cost of PD chips that meet EPR charging scenarios in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a USB-C interface device is provided, including: a power transmission chip; a USB-C connector, which is communicatively connected to the power transmission chip; a power input line receiving module, including a first switch structure, a first voltage dividing structure, and a second voltage dividing structure, wherein the first switch structure includes an input end, a first output end, and a second output end, the input end of the first switch structure is electrically connected to the power transmission chip, the first output end of the first switch structure is used to electrically connect to the USB-C connector through the power input line, the second output end of the first switch structure is electrically connected to the first end of the first voltage dividing structure, the second end of the first voltage dividing structure is electrically connected to the first output end of the first switch structure, and the The first end of the second voltage-dividing structure is electrically connected to the first end of the first voltage-dividing structure, and the second end of the second voltage-dividing structure is grounded; wherein, when the USB-C interface device is in a standard power range charging state, the input end of the first switch structure is conductive with the first output end and is not conductive with the second output end, so that the power transmission chip detects the voltage value of the power input line through the first output end of the first switch structure; when the USB-C interface device is in an extended power range charging state, the input end of the first switch structure is conductive with the second output end and is not conductive with the first output end, so that the power transmission chip detects the voltage value through the second output end of the first switch structure.

[0006] Optionally, the power input line receiving module also includes: a second switch structure, the second end of the second voltage divider structure is grounded through the second switch structure, and when the power transmission chip is in the standard power range charging state, the second switch structure is disconnected; when the power transmission chip is in the extended power range charging state, the second switch structure is turned on.

[0007] Optionally, the resistance of the first voltage-dividing structure and the resistance of the second voltage-dividing structure are both 1 kiloohm to 1 megohm, and the resistance of the first voltage-dividing structure is greater than the resistance of the second voltage-dividing structure.

[0008] Optionally, a ratio of the resistance of the second voltage-dividing structure to the total resistance is less than or equal to 0.4, and the total resistance is the sum of the resistances of the first voltage-dividing structure and the second voltage-dividing structure.

[0009] Optionally, the first switch structure includes: a MOS tube, one of the source and the drain of the MOS tube is the input end of the first switch structure, and the other of the source and the drain of the MOS tube is the first output end of the first switch structure; a triode, one of the collector and the emitter of the triode is the input end of the first switch structure, and the other of the collector and the emitter of the triode is the second output end of the first switch structure, and the control ends of the MOS tube and the triode constitute the control end of the first switch structure.

[0010] Optionally, the resistance of the MOS tube is less than 10 milliohms.

[0011] Optionally, the first switch structure includes a single-pole double-throw switch.

[0012] Optionally, the first switch structure further includes a control end, the power transmission chip includes a power transmission controller, the power input line receiving module further includes a control module, the power transmission controller is communicatively connected to the USB-C connector and the control module respectively, the control module is electrically connected to the control end of the first switch structure, and when the USB-C connector is connected to a charging device, a charging status signal is sent to the power transmission controller, and when the charging status signal indicates that the USB-C interface device is in the standard power range charging state, the power transmission controller sends a first signal to the control module; when the charging status signal indicates that the USB-C interface device is in the extended power range charging state, the power transmission controller sends a second signal to the control module, the first signal is used to instruct the control module to control the input end of the first switch structure to be conductive and the first output end to be non-conductive, and the second signal is used to instruct the control module to control the input end of the first switch structure to be conductive and the second output end to be non-conductive.

[0013] Optionally, the power transmission chip also includes a third switch structure, the power transmission controller is electrically connected to the control end of the third switch structure, the input end of the third switch structure is used to connect the power supply, the output end of the third switch structure is electrically connected to the input end of the first switch structure, the power input line receiving module also includes a fourth switch structure, the control module is electrically connected to the control end of the fourth switch structure, the first end of the fourth switch structure is electrically connected to the USB-C connector through the power input line, and the second end of the fourth switch structure is used to be electrically connected to the charger chip. When the USB-C connector is connected to a power-taking device, a power-taking signal is sent to the power transmission controller so that the power transmission controller controls the third switch structure to close, and sends a third signal to the control module, the third signal is used to instruct the control module to control the fourth switch structure to open; the power transmission controller is also used to control the third switch structure to open when receiving the charging status signal, and the first signal and the second signal are also used to instruct the control module to control the fourth switch structure to close.

[0014] According to another aspect of the present application, a USB-C interface system is provided, comprising: any one of the USB-C interface devices described above; and a charger chip electrically connected to a USB-C connector in the USB-C interface device via a power input line receiving module in the USB-C interface device.

[0015] By applying the technical solution of the present application, a first switch structure, a first voltage-dividing structure and a second voltage-dividing structure are provided in a power input line receiving module, a power transmission chip is electrically connected to one end of the power input line through an input end and a first output end of the first switch structure, the other end of the power input line is electrically connected to a USB-C connector, the power transmission chip is connected to one end of the second voltage-dividing structure through an input end and a second output end of the first switch structure, the second end of the second voltage-dividing structure is grounded, the first voltage-dividing structure is electrically connected between one end of the second switch structure and the first output end of the first switch structure, and when the USB-C interface device is in a charging state within a standard power range, it indicates that the voltage on the power input line (hereinafter referred to as voltage) The power input line voltage) is low and will not damage the power transmission chip. At this time, the input end of the first switch structure and the first output end are connected, and the power transmission chip is electrically connected to the power input line through the input end and the first output end of the first switch structure to detect the power input line voltage, ensuring the normal detection function of the power transmission chip on the power input line voltage; while when the USB-C interface device is in the extended power range charging state, the surface power input line voltage is high. At this time, the input end of the first switch structure and the second output end are connected, and the power transmission chip detects the power input line voltage after the first voltage divider structure and the second voltage divider structure divide the voltage, which can avoid the high voltage on the power input line from damaging the power transmission chip. The power transmission chip of the present application can be applied to standard power range charging scenarios and extended power range charging scenarios without the need for high voltage withstand process preparation, ensuring the overall process cost of the USB-C interface device is low, and solving the problem of high cost of PD chips that meet EPR charging scenarios in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A schematic structural diagram of a USB-C interface device provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic structural diagram of another USB-C interface device provided according to an embodiment of the present application is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Power transmission chip; 101. Third switch structure; 11. USB-C connector; 12. Power input line receiving module; 121. First switch structure; 122. First voltage divider structure; 123. Second voltage divider structure; 124. Second switch structure; 125. Fourth switch structure; 13. Power supply; 14. Charger chip. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] As introduced in the background technology, there is a problem in the prior art that the PD chip that meets the EPR charging scenario has a high cost. In order to solve the above technical problem, the embodiments of the present application provide a USB-C interface device and a USB-C interface system.

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] An embodiment of the present application provides a USB-C interface device, Figure 1 A schematic diagram of the structure of a USB-C interface device is shown as an example. Figure 1 As shown, the above-mentioned USB-C interface device includes:

[0027] Power delivery (PD) chip 10;

[0028] A USB-C connector 11, which is communicatively connected to the power transmission chip 10;

[0029] Specifically, one end of the USB-C connector 11 is electrically connected to the power transmission chip 10, and the other end of the USB-C connector 11 is electrically connected to a power-taking device (such as a mobile phone, a computer, etc.) or a charging device (such as a charger, etc.). The power transmission chip 10 is used to control the power transmission of the USB-C connector 11.

[0030] The power input line receiving module 12 includes a first switch structure 121, a first voltage dividing structure 122 and a second voltage dividing structure 123. The first switch structure 121 includes an input end, a first output end and a second output end. The input end of the first switch structure 121 is electrically connected to the power transmission chip 10. The first output end of the first switch structure 121 is used to electrically connect the USB-C connector 11 through the power input line Vbus. The second output end of the first switch structure 121 is electrically connected to the first end of the first voltage dividing structure 122. The second end of the first voltage dividing structure 122 is electrically connected to the first output end of the first switch structure 121. The first end of the second voltage dividing structure 123 is electrically connected to the first end of the first voltage dividing structure 122. The second end of the second voltage dividing structure 123 is grounded.

[0031] Specifically, the first output end of the first switch structure 121, the power input line Vbus, and the USB-C connector 11 are electrically connected in sequence, and the second end of the first voltage-dividing structure 122, the power input line Vbus, and the USB-C connector 11 are electrically connected in sequence. The first voltage-dividing structure 122 is electrically connected between the first output end and the second output end of the first switch structure 121, and the second voltage-dividing structure 123 is electrically connected between the second output end of the first switch structure 121 and the ground.

[0032] Among them, when the above-mentioned USB-C interface device is in a standard power range charging state, the input end of the above-mentioned first switch structure 121 is conductive with the first output end and is not conductive with the second output end, so that the above-mentioned power transmission chip 10 detects the voltage value of the above-mentioned power input line Vbus through the first output end of the above-mentioned first switch structure 121; when the above-mentioned USB-C interface device is in an extended power range charging state, the input end of the above-mentioned first switch structure 121 is conductive with the second output end and is not conductive with the first output end, so that the above-mentioned power transmission chip 10 detects the above-mentioned voltage value through the second output end of the above-mentioned first switch structure 121.

[0033] Specifically, the standard power range (SPR) charging state refers to the state in which the USB-C interface device is in a charging state and the charging specification meets the standard power range; the extended power range (EPR) charging state refers to the state in which the USB-C interface device is in a charging state and the charging specification meets the extended power range. The charging voltage of the extended power range is greater than the charging voltage of the standard power range. When the input end and the first output end of the first switch structure 121 are conductive and the input end and the second output end are not conductive, the power transmission chip 10 is directly connected to the power input line Vbus to detect the voltage on the power input line Vbus; when the input end and the second output end of the first switch structure 121 are conductive and the input end and the first output end are not conductive, the voltage detected by the power transmission chip 10 is the voltage value after the voltage is divided by the first voltage divider structure 122 and the second voltage divider structure 123, and the voltage value is less than the voltage on the power input line Vbus.

[0034] Through the above embodiments, the present application sets a first switch structure, a first voltage dividing structure and a second voltage dividing structure in the power input line receiving module, the power transmission chip is electrically connected to one end of the power input line through the input end and the first output end of the first switch structure, the other end of the power input line is electrically connected to the USB-C connector, the power transmission chip is connected to one end of the second voltage dividing structure through the input end and the second output end of the first switch structure, the second end of the second voltage dividing structure is grounded, the first voltage dividing structure is electrically connected between one end of the second switch structure and the first output end of the first switch structure, and when the above USB-C interface device is in a standard power range charging state, it indicates that the voltage on the power input line (hereinafter referred to as voltage) The power input line voltage) is low and will not damage the power transmission chip. At this time, the input end of the first switch structure and the first output end are connected, and the power transmission chip is electrically connected to the power input line through the input end and the first output end of the first switch structure to detect the power input line voltage, ensuring the normal detection function of the power transmission chip on the power input line voltage; while when the USB-C interface device is in the extended power range charging state, the surface power input line voltage is high. At this time, the input end of the first switch structure and the second output end are connected, and the power transmission chip detects the power input line voltage after the first voltage divider structure and the second voltage divider structure divide the voltage, which can avoid the high voltage on the power input line from damaging the power transmission chip. The power transmission chip of the present application can be applied to standard power range charging scenarios and extended power range charging scenarios without the need for high voltage withstand process preparation, ensuring the overall process cost of the USB-C interface device is low, and solving the problem of high cost of PD chips that meet EPR charging scenarios in the prior art.

[0035] Specifically, when the USB-C interface device is in a charging state, the other end of the USB-C connector 11 is electrically connected to a charging device such as a charger, and the internal charging chip or battery is charged through the charging device.

[0036] In one alternative, Figure 1 and Figure 2 As shown, the power input line receiving module 12 further includes: a second switch structure 124, the second end of the second voltage dividing structure 123 is grounded through the second switch structure 124, and when the power transmission chip 10 is in the above-mentioned standard power range charging state, the second switch structure 124 is disconnected; when the power transmission chip 10 is in the above-mentioned extended power range charging state, the second switch structure 124 is turned on. That is to say, the second switch structure 124 is connected in series between the second voltage dividing structure 123 and the ground, and when the power transmission chip 10 is in the above-mentioned extended power range charging state, the branch from the second output end of the first switch structure 121 to the ground through the first voltage dividing structure 122 and the second voltage dividing structure 123 is turned on, and at this time, the first voltage dividing structure 122 and the second voltage dividing structure 123 play a voltage dividing role; and when the power transmission chip 10 is in the above-mentioned standard power range charging state, the branch from the first output end of the first switch structure 121 to the ground through the first voltage dividing structure 122 and the second voltage dividing structure 123 is disconnected. This can prevent leakage current from occurring on the power input line Vbus through the first voltage-dividing structure and the second voltage-dividing structure when charging in the standard power range, thereby further ensuring the safety of the USB-C interface device.

[0037] In the present application, the first switch structure 121 further includes a control end (not shown in the figure), the power transmission chip 10 includes a power transmission controller (not shown in the figure), the power input line receiving module 12 further includes a control module (not shown in the figure), the power transmission controller is respectively communicated with the USB-C connector 11 and the control module, the control module is electrically connected to the control end of the first switch structure 121, and when the USB-C connector 11 is connected to a charging device, a charging status signal is sent to the power transmission controller, the charging status signal is a signal indicating that the USB-C interface device is in the charging state within the standard power range, or is a signal indicating that the USB-C interface device is in the charging state within the extended power range. signal; when the charging status signal indicates that the USB-C interface device is in the standard power range charging state, the power transmission controller sends a first signal (EN2=0) to the control module; when the charging status signal indicates that the USB-C interface device is in the extended power range charging state, the power transmission controller sends a second signal (EN2=1) to the control module, the first signal is used to instruct the control module to control the input end of the first switch structure 121 to be conductive with the first output end and not conductive with the input end and the second output end, and the second signal is used to instruct the control module to control the input end of the first switch structure 121 to be conductive with the second output end and not conductive with the input end and the first output end.

[0038] In the above embodiment, when the USB-C connector is connected to a charging device, a charging state signal is sent to the power transmission controller, so that the power transmission controller determines whether the USB-C interface device is currently in a standard power range charging state or an extended power range charging state according to the charging state signal. If it is in the standard power range charging state, the power transmission controller sends a first signal to the control module, so that the control module controls the input end of the first switch structure to be conductive with the first output end and the input end to be non-conductive with the second output end according to the first signal, thereby realizing that the power transmission chip is directly connected to the power input line; if it is in the extended power range charging state, the power transmission controller sends a second signal to the control module, so that the control module controls the input end of the first switch structure to be conductive with the second output end and the input end to be non-conductive with the first output end according to the second signal, thereby realizing that the power transmission chip is grounded through the second switch structure. Through the communication between the power transmission controller and the USB-C connector, the current state of the USB-C interface device can be automatically determined, and the control of the first switch structure can be automatically triggered according to the determined current state.

[0039] Specifically, Figure 2As shown, the power transmission controller and the USB-C connector 11 communicate via CC1 and CC2 signal lines to achieve the interaction of the charging status signal. Figure 2 As shown, the power transmission controller and the USB-C connector 11 also transmit audio and other data through the SBU1 and SBU2 signal lines.

[0040] Alternatively, if Figure 2 As shown, the power transmission chip 10 further includes a third switch structure 101, the power transmission controller is electrically connected to the control end of the third switch structure 101, the input end of the third switch structure 101 is used to connect to the power supply 13, the output end of the third switch structure 101 is electrically connected to the input end of the first switch structure 121, the power input line receiving module 12 further includes a fourth switch structure 125, the control module is electrically connected to the control end of the fourth switch structure 125, the first end of the fourth switch structure 125 is electrically connected to the USB-C connector 11 through the power input line Vbus, and the second end of the fourth switch structure 125 is used to electrically connect to the charger chip 14 Then, when the USB-C connector 11 is connected to a power-taking device, a power-taking signal is sent to the power transmission controller, and the power-taking signal indicates that the USB-C interface device is in a power-taking state, so that the power transmission controller controls the third switch structure 101 to close, and sends a third signal (EN1 signal) to the control module, and the third signal is used to instruct the control module to control the fourth switch structure 125 to open; the power transmission controller is also used to control the third switch structure 101 to open when receiving the charging status signal, and the first signal and the second signal are also used to instruct the control module to control the fourth switch structure 125 to close.

[0041] In the above embodiment, when the USB-C interface device is in a charging state (i.e., the USB-C connector is connected to an external charging device), the power transmission controller controls the third switch structure to be disconnected, so that the power transmission chip is disconnected from the power supply. The power transmission controller also sends a first signal or a second signal to the control module of the power input line receiving module, so that the control module controls the first output end of the first switch structure to be turned on or the second output end to be turned on, and at the same time controls the fourth switch structure to be closed, so that the external charging device is electrically connected to the charger chip through the USB-C connector, the power input line, and the fourth switch structure in sequence, so that the external charging device charges the internal charger chip. Charging effect: When the above-mentioned USB-C interface device is in a power-taking state (i.e., the USB-C connector is connected to an external power-taking device), the USB-C connector will send a power-taking signal to the power transmission controller, and the power transmission controller controls the third switch structure to close according to the power-taking signal, so that the power supply is electrically connected to the external power-taking device through the third switch structure, the first switch structure, the power input line, and the USB-C connector in sequence, thereby achieving the effect of the internal power supply charging the external power-taking device, and the power transmission controller also sends a third signal to the control module to instruct to disconnect the fourth switch structure, so that the line between the external charging device, the USB-C connector, the power input line and the charger chip is disconnected.

[0042] The above-mentioned control module is also electrically connected to the control end of the above-mentioned second switch structure. When the above-mentioned first signal is received, the above-mentioned control module controls the above-mentioned second switch structure to be disconnected through the control end of the above-mentioned second switch structure. When the above-mentioned second signal is received, the above-mentioned control module controls the above-mentioned second switch structure to be turned on through the control end of the above-mentioned second switch structure.

[0043] Specifically, the power supply is used to provide an electrical signal of 5V / 3A. The second switch structure, the third switch structure and the third switch structure can be any suitable switch device, including but not limited to MOS tube, triode or other semiconductor transistor.

[0044] In actual application, the first voltage-dividing structure 122 and the second voltage-dividing structure 123 can be any suitable voltage-dividing device, including but not limited to: at least part of a resistor, an inductor, a capacitor, and a diode. The device types of the first voltage-dividing structure 122 and the second voltage-dividing structure 123 can be the same, for example, both are resistors; the device types of the first voltage-dividing structure 122 and the second voltage-dividing structure 123 can also be different, for example, the first voltage-dividing structure 122 is a resistor, and the second voltage-dividing structure 123 is a resistor-capacitor voltage divider.

[0045] According to some exemplary embodiments of the present application, the resistance of the first voltage-dividing structure 122 and the resistance of the second voltage-dividing structure 123 are both 1 kiloohm to 1 megohm. For example, the resistance of the first voltage-dividing structure 122 may be 1kΩ, 10kΩ, 100kΩ, 300kΩ, or 1MΩ, etc.; for example, the resistance of the second voltage-dividing structure 123 may be 1kΩ, 10kΩ, 100kΩ, 500kΩ, or 1MΩ, etc.; the resistance of the first voltage-dividing structure 122 is greater than the resistance of the second voltage-dividing structure 123. In this embodiment, by setting the resistance range of the first voltage-dividing structure and the second voltage-dividing structure, it is possible to avoid the problem that the voltage on the power input line Vbus is greatly reduced after voltage division due to the resistance of the first voltage-dividing structure and the second voltage-dividing structure being too large, thereby affecting the detection accuracy of the power transmission chip, and it is also possible to avoid the problem that the voltage division effect is poor due to the resistance of the first voltage-dividing structure and the second voltage-dividing structure being too small; in addition, since when the above-mentioned USB-C interface device is in the extended power range charging state, the above-mentioned power transmission chip detects the voltage value at both ends of the second voltage-dividing structure, the resistance of the above-mentioned first voltage-dividing structure is set to be greater than the resistance of the above-mentioned second voltage-dividing structure, which can further avoid the high voltage on the power input line from damaging the power transmission chip, so that the power transmission chip can be applied to the EPR scenario on the basis of maintaining the original design capability, thereby greatly reducing the cost of the device.

[0046] Furthermore, the ratio of the resistance of the second voltage-dividing structure 123 to the total resistance is less than or equal to 0.4, and the total resistance is the sum of the resistances of the first voltage-dividing structure 122 and the second voltage-dividing structure 123. Since the standard power range charging scenario requires that the Vbus pin of the power transmission chip needs to withstand a voltage of not less than 24V (20V+20%), and since the extended power range charging scenario requires that the Vbus pin of the power transmission chip needs to withstand a voltage of not less than 55V (48V+20%), by setting the ratio of the resistance of the second voltage-dividing structure to the total resistance to be less than or equal to 0.4, it is ensured that the voltage detected by the power transmission chip in the extended power range charging scenario does not exceed 22V, which is lower than the Vbus pin voltage requirement of 24V for the power transmission chip in the standard power range charging scenario, further ensuring that the power transmission chip of the present application can be applied to the design of EPR.

[0047] The Vbus pin of the power transmission chip is the pin of the power transmission chip electrically connected to the input end of the first switch structure 121 .

[0048] Those skilled in the art may select any appropriate switch device as the first switch structure 121 .

[0049] In an exemplary embodiment, the first switch structure 121 includes a single-pole double-throw switch. By controlling the handle of the single-pole double-throw switch, when the USB-C interface device is in a standard power range charging state, the input end of the first switch structure is connected to the first output end and the input end is not connected to the second output end, and when the USB-C interface device is in an extended power range charging state, the input end of the first switch structure is connected to the second output end and the input end is not connected to the first output end.

[0050] Furthermore, the first switch structure 121 may be a single-pole double-throw switch.

[0051] In another exemplary embodiment, the first switch structure 121 includes: a MOS tube, one of the source and the drain of the MOS tube is the input end of the first switch structure 121, and the other of the source and the drain of the MOS tube is the first output end of the first switch structure 121; a triode, one of the collector and the emitter of the triode is the input end of the first switch structure 121, and the other of the collector and the emitter of the triode is the second output end of the first switch structure 121, and the control ends of the MOS tube and the triode constitute the control end of the first switch structure 121. In this embodiment, a MOS tube is used to connect between the power transmission chip and the power input line. The MOS tube has the characteristics of small on-resistance and small driving power. When the USB-C interface device is in a standard power range charging state, it can ensure that the on-voltage drop from the input end to the first output end of the first switching structure is small; a triode is used to connect between the power transmission chip and the first end of the second switch structure. The triode has the characteristics of fast switching speed and low cost. When the USB-C interface device is in a standard power range charging state, fast conduction between the power transmission chip and the power input line can be achieved, saving the overall cost of the device; the use of MOS tubes and triodes can also ensure that the overall occupied area of ​​the first switch structure is small, which is conducive to the integration and miniaturization of the device.

[0052] Exemplarily, the resistance of the MOS tube is less than 10 milliohms. The MOS tube can pass a current of 3A. Due to the small resistance, the voltage drop between the power transmission chip and the power input line bracket can be minimized when the current passes. The triode can pass a current of less than 1mA.

[0053] Furthermore, the first switch structure can be communicated by the MOS tube and the triode. The control ends of the MOS tube and the triode are both connected to the control module, and the control module controls the high and low level signals sent to the control ends of the MOS tube and the triode to control the closing or opening of the MOS tube and the triode.

[0054] Specifically, the MOS transistor may be a PMOS, the source of the PMOS being the input terminal of the first switch structure 121, and the drain of the PMOS being the first output terminal of the first switch structure 121. The MOS transistor may also be an NMOS, the drain of the NMOS being the input terminal of the first switch structure 121, and the source of the NMOS being the first output terminal of the first switch structure 121.

[0055] In addition to the above implementation, in another exemplary embodiment, the first switch structure includes: a first MOS, the input end of the first MOS is the input end of the first switch structure, the output end of the first MOS is the first output end of the first switch structure; a second MOS, the conductivity type of the second MOS is different from the conductivity type of the first MOS, that is, when the first MOS is PMOS, the second MOS is NMOS, and when the first MOS is NMOS, the second MOS is PMOS, the input end of the second MOS is electrically connected to the input end of the first MOS, the control end of the second MOS is electrically connected to the control end of the first MOS, the output end of the second MOS is the second output end of the first switch structure, and the control module is electrically connected to the control end of the second MOS. The control module can control the first MOS to be turned on and the second MOS to be turned off by a signal, or control the first MOS to be turned off and the second MOS to be turned on, thereby simplifying the control logic of the control module on the first switch structure.

[0056] In the present application, when the USB-C interface device is in the charging state within the standard power range, the power transmission chip directly detects the voltage on the power input line. When the detected voltage value is inconsistent with the specification of the standard power range, specifically, when the detected voltage value is higher than the specification, the power transmission controller will send a corresponding signal to the USB-C connector to disconnect the USB-C connector from the external charging device; when the detected voltage value is lower than the specification, the power transmission controller will send a corresponding signal to the USB-C connector to enable the USB-C connector to execute some preset measures so that the voltage on the power input line meets the specification after adjustment.

[0057] When the USB-C interface device is in the extended power range charging state, the power transmission chip detects a voltage value after voltage division by the second voltage division structure. The detection voltage value on the power input line is calculated based on the voltage value and the ratio of the resistance of the second voltage division structure to the total resistance. When the detection voltage value is inconsistent with the specification of the standard power range, specifically, when the detection voltage value is higher than the specification, the power transmission controller sends a corresponding signal to the USB-C connector to disconnect the USB-C connector from the external charging device; when the detection voltage value is lower than the specification, the power transmission controller sends a corresponding signal to the USB-C connector to enable the USB-C connector to execute some preset measures to ensure that the voltage on the power input line meets the specification after adjustment.

[0058] The embodiment of the present application also provides a USB-C interface system, such as Figure 2 As shown, the USB-C interface system includes:

[0059] Any of the above USB-C interface devices;

[0060] The charger chip 14 is electrically connected to the USB-C connector 11 in the above-mentioned USB-C interface device through the power input line receiving module 12 in the above-mentioned USB-C interface device.

[0061] In the above-mentioned USB-C interface system, the USB-C interface device sets a first switch structure, a first voltage divider structure and a second voltage divider structure in the power input line receiving module, the power transmission chip is electrically connected to one end of the power input line through the input end and the first output end of the first switch structure, the other end of the power input line is electrically connected to the USB-C connector, the power transmission chip is connected to one end of the second voltage divider structure through the input end and the second output end of the first switch structure, the second end of the second voltage divider structure is grounded, and the first voltage divider structure is electrically connected between one end of the second switch structure and the first output end of the first switch structure. When the above-mentioned USB-C interface device is in a standard power range charging state, it indicates that the power The input line voltage is low and will not damage the power transmission chip. At this time, the input end of the first switch structure is connected to the first output end. The power transmission chip is electrically connected to the power input line through the input end and the first output end of the first switch structure to detect the power input line voltage, ensuring the normal detection function of the power transmission chip on the power input line voltage; when the USB-C interface device is in the extended power range charging state, the surface power input line voltage is high. At this time, the input end of the first switch structure is connected to the second output end. The power transmission chip detects the power input line voltage after the first voltage divider structure and the second voltage divider structure divide the voltage, which can avoid the high voltage on the power input line from damaging the power transmission chip. The power transmission chip of the present application can be applied to standard power range charging scenarios and extended power range charging scenarios without the need for high voltage withstand process preparation, ensuring the overall process cost of the USB-C interface device is low, solving the problem of high cost of PD chips that meet EPR charging scenarios in the prior art, and ensuring the low manufacturing cost of the USB-C interface system.

[0062] In addition, if Figure 2 As shown, the USB-C interface system further includes: a power supply 13 , and an input end of the third switch structure 101 in the power input line receiving module 12 is electrically connected to the power supply 13 .

[0063] Specifically, the power supply is used to provide an electrical signal of 5V / 3A.

[0064] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0065] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0066] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0067] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0068] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0069] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0070] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0071] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0072] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0073] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0074] The USB-C interface device of the present application is provided with a first switch structure, a first voltage dividing structure and a second voltage dividing structure in a power input line receiving module, a power transmission chip is electrically connected to one end of the power input line through an input end and a first output end of the first switch structure, the other end of the power input line is electrically connected to a USB-C connector, the power transmission chip is connected to one end of the second voltage dividing structure through an input end and a second output end of the first switch structure, the second end of the second voltage dividing structure is grounded, the first voltage dividing structure is electrically connected between one end of the second switch structure and the first output end of the first switch structure, and when the above-mentioned USB-C interface device is in a standard power range charging state, it indicates that the voltage on the power input line (hereinafter referred to as The power input line voltage) is low and will not damage the power transmission chip. At this time, the input end of the first switch structure and the first output end are connected, and the power transmission chip is electrically connected to the power input line through the input end and the first output end of the first switch structure to detect the power input line voltage, ensuring the normal detection function of the power transmission chip on the power input line voltage; while when the USB-C interface device is in the extended power range charging state, the surface power input line voltage is high. At this time, the input end of the first switch structure and the second output end are connected, and the power transmission chip detects the power input line voltage after the first voltage divider structure and the second voltage divider structure divide the voltage, which can avoid the high voltage on the power input line from damaging the power transmission chip. The power transmission chip of the present application can be applied to standard power range charging scenarios and extended power range charging scenarios without the need for high voltage withstand process preparation, ensuring the overall process cost of the USB-C interface device is low, and solving the problem of high cost of PD chips that meet EPR charging scenarios in the prior art.

[0075] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A USB-C interface device, characterized in that: include: Power delivery chip; A USB-C connector, communicatively connected to the power transmission chip; A power input line receiving module, comprising a first switch structure, a first voltage dividing structure and a second voltage dividing structure, wherein the first switch structure comprises an input end, a first output end and a second output end, the input end of the first switch structure is electrically connected to the power transmission chip, the first output end of the first switch structure is used to electrically connect the USB-C connector through the power input line, the second output end of the first switch structure is electrically connected to the first end of the first voltage dividing structure, the second end of the first voltage dividing structure is electrically connected to the first output end of the first switch structure, the first end of the second voltage dividing structure is electrically connected to the first end of the first voltage dividing structure, and the second end of the second voltage dividing structure is grounded; Wherein, when the USB-C interface device is in a standard power range charging state, the input end and the first output end of the first switch structure are conductive and the input end and the second output end are not conductive, so that the power transmission chip detects the voltage value of the power input line through the first output end of the first switch structure; When the USB-C interface device is in an extended power range charging state, the input end of the first switch structure is conductive with the second output end and is not conductive with the first output end, so that the power transmission chip detects the voltage value through the second output end of the first switch structure.

2. The USB-C interface device according to claim 1, characterized in that: The power input line receiving module also includes: A second switch structure, wherein the second end of the second voltage-dividing structure is grounded through the second switch structure, and when the power transmission chip is in the standard power range charging state, the second switch structure is disconnected; when the power transmission chip is in the extended power range charging state, the second switch structure is turned on.

3. The USB-C interface device according to claim 1, characterized in that: The resistance of the first voltage-dividing structure and the resistance of the second voltage-dividing structure are both 1 kiloohm to 1 megohm, and the resistance of the first voltage-dividing structure is greater than the resistance of the second voltage-dividing structure.

4. The USB-C interface device according to claim 1, characterized in that: A ratio of the resistance of the second voltage-dividing structure to the total resistance is less than or equal to 0.4, and the total resistance is the sum of the resistances of the first voltage-dividing structure and the second voltage-dividing structure.

5. The USB-C interface device according to claim 1, characterized in that: The first switch structure comprises: A MOS transistor, one of a source and a drain of the MOS transistor being an input end of the first switch structure, and the other of the source and the drain of the MOS transistor being a first output end of the first switch structure; A transistor, one of the collector and the emitter of the transistor is the input end of the first switch structure, the other of the collector and the emitter of the transistor is the second output end of the first switch structure, and the MOS tube and the control end of the transistor constitute the control end of the first switch structure.

6. The USB-C interface device according to claim 5, characterized in that: The resistance of the MOS tube is less than 10 milliohms.

7. The USB-C interface device according to claim 1, characterized in that: The first switch structure includes a single-pole double-throw switch.

8. The USB-C interface device according to any one of claims 1 to 7, characterized in that: The first switch structure further includes a control end, the power transmission chip includes a power transmission controller, the power input line receiving module further includes a control module, the power transmission controller is respectively connected to the USB-C connector and the control module for communication, and the control module is electrically connected to the control end of the first switch structure. When the USB-C connector is connected to a charging device, a charging status signal is sent to the power transmission controller, and when the charging status signal indicates that the USB-C interface device is in the standard power range charging state, the power transmission controller sends a first signal to the control module; When the charging status signal indicates that the USB-C interface device is in the extended power range charging state, the power transmission controller sends a second signal to the control module, the first signal is used to instruct the control module to control the input end of the first switch structure to be conductive and the first output end to be non-conductive, and the second signal is used to instruct the control module to control the input end of the first switch structure to be conductive and the second output end to be non-conductive.

9. The USB-C interface device according to claim 8, characterized in that: The power transmission chip further includes a third switch structure, the power transmission controller is electrically connected to the control end of the third switch structure, the input end of the third switch structure is used to connect to the power supply, the output end of the third switch structure is electrically connected to the input end of the first switch structure, the power input line receiving module further includes a fourth switch structure, the control module is electrically connected to the control end of the fourth switch structure, the first end of the fourth switch structure is electrically connected to the USB-C connector through the power input line, and the second end of the fourth switch structure is used to be electrically connected to the charger chip, When the USB-C connector is connected to a power-taking device, a power-taking signal is sent to the power transmission controller, so that the power transmission controller controls the third switch structure to be closed, and a third signal is sent to the control module, wherein the third signal is used to instruct the control module to control the fourth switch structure to be opened; The power transmission controller is further used to control the third switch structure to be opened when receiving the charging state signal, and the first signal and the second signal are further used to instruct the control module to control the fourth switch structure to be closed.

10. A USB-C interface system, characterized in that: include: The USB-C interface device according to any one of claims 1 to 9; The charger chip is electrically connected to the USB-C connector in the USB-C interface device through the power input line receiving module in the USB-C interface device.

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