USB-c interface device and USB-c interface system

Abstract

The present disclosure 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 connector communicatively connected to the power transmission chip; and a power supply input line receiving module. In the module, a first output end of a first switch structure is electrically connected to the USB-C connector by means of a power supply input line, a second output end of the first switch structure is electrically connected to a first end of a first voltage dividing structure, a second end of the first voltage dividing structure is electrically connected to the first output end of the first switch structure, a first end of a second voltage dividing structure is electrically connected to the first end of the first voltage dividing structure, and a second end of the second voltage dividing structure is grounded. When the USB-C interface device is in a standard power range charging state, an input end and the first output end of the first switch structure are connected; and when the USB-C interface device is in an extended power range charging state, the input end and the second output end of the first switch structure are connected.

Description

USB-C interface devices and USB-C interface systems

[0001] Cross-reference of related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 2024119368536, filed on December 25, 2024, entitled "USB-C Interface Device and USB-C Interface System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of electronic device technology, and more specifically, to a USB-C interface device and a USB-C interface system. Background Technology

[0004] Currently, the USB-C (Universal Serial Bus Type-C) interface is the primary interface for laptops and mobile phones. The adoption of EPR (extended power range) has increased the Vbus (power input line) voltage on the USB-C interface from a maximum of 20V to a maximum of 48V. This increased voltage presents several challenges for USB-C interface system design, the most significant being the voltage tolerance of the USB-C PD (Power Delivery) control chip.

[0005] Since Vbus is connected to the PD controller, the PD controller must be able to withstand the high voltage of Vbus. Under SPR (Standard Power Range) conditions, the Vbus pin of the PD controller needs to withstand a voltage of no less than 24V (20V + 20%); under EPR conditions, the Vbus pin needs to withstand a voltage of no less than 55V (48V + 20%). To improve the voltage withstand capability of the Vbus pin in the PD controller, a higher voltage withstand process must be used, which significantly increases the chip cost. Summary of the Invention

[0006] The main objective of this disclosure 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.

[0007] To achieve the above objectives, according to one aspect of this disclosure, a USB-C interface device is provided, comprising: a power delivery chip; a USB-C connector communicatively connected to the power delivery chip; and a power input line receiving module, including a first switch structure, a first voltage divider structure, and a second voltage divider structure. The first switch structure includes an input terminal, a first output terminal, and a second output terminal. The input terminal of the first switch structure is electrically connected to the power delivery chip. The first output terminal of the first switch structure is used to electrically connect to the USB-C connector via a power input line. The second output terminal of the first switch structure is electrically connected to the first terminal of the first voltage divider structure, and the second terminal of the first voltage divider structure is electrically connected to the first output terminal of the first switch structure. The first end of the second voltage divider structure is electrically connected to the first end of the first voltage divider structure, and the second end of the second voltage divider structure is grounded. 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, but not connected to the second output end, allowing the power transmission chip to detect 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 connected to the second output end, but not connected to the first output end, allowing the power transmission chip to detect the voltage value through the second output end of the first switch structure.

[0008] Optionally, the power input line receiving module further includes: a second switch structure, wherein the second end of the second voltage divider structure is grounded through the second switch structure; when the power transmission chip is in the standard power range charging state, the second switch structure is open; when the power transmission chip is in the extended power range charging state, the second switch structure is on.

[0009] Optionally, the resistors of the first voltage divider structure and the second voltage divider structure are both 1 kΩ to 1 MΩ, and the resistor of the first voltage divider structure is greater than the resistor of the second voltage divider structure.

[0010] Optionally, the ratio of the resistance of the second voltage divider structure to the total resistance is less than or equal to 0.4, where the total resistance is the sum of the resistances of the first voltage divider structure and the second voltage divider structure.

[0011] Optionally, the first switching structure includes: a MOSFET, wherein one of the source and drain of the MOSFET is the input terminal of the first switching structure, and the other of the source and drain of the MOSFET is the first output terminal of the first switching structure; and a transistor, wherein one of the collector and emitter of the transistor is the input terminal of the first switching structure, and the other of the collector and emitter of the transistor is the second output terminal of the first switching structure, and the control terminals of the MOSFET and the transistor constitute the control terminal of the first switching structure.

[0012] Optionally, the resistance of the MOSFET is less than 10 milliohms.

[0013] Optionally, the first switch structure includes a single-pole double-throw switch.

[0014] Optionally, the first switch structure further includes a control terminal, the power transmission chip includes a power transmission controller, and the power input line receiving module further includes a control module. The power transmission controller is communicatively connected to both the USB-C connector and the control module. The control module is electrically connected to the control terminal 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. 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 first switch structure to conduct between the input terminal and the first output terminal and to de-conduct between the input terminal and the second output terminal. The second signal is used to instruct the control module to control the first switch structure to conduct between the input terminal and the second output terminal and to de-conduct between the input terminal and the first output terminal.

[0015] Optionally, the power transmission chip further includes a third switch structure. The power transmission controller is electrically connected to the control terminal of the third switch structure. The input terminal of the third switch structure is used to connect to a power source, and the output terminal of the third switch structure is electrically connected to the input terminal 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 terminal of the fourth switch structure. The first terminal of the fourth switch structure is electrically connected to the USB-C connector via the power input line, and the second terminal of the fourth switch structure is used to connect to the charger chip. When a power-drawing device is connected to the USB-C connector, a power-drawing signal is sent to the power transmission controller, causing the power transmission controller to control the third switch structure to close and send 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 it receives the charging status signal. The first signal and the second signal are also used to instruct the control module to control the fourth switch structure to close.

[0016] According to another aspect of this disclosure, a USB-C interface system is provided, comprising: any 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.

[0017] Applying the technical solution of this disclosure, a first switch structure, a first voltage divider structure, and a second voltage divider structure are set 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 terminal and the first output terminal 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 terminal and the second output terminal of the first switch structure. The second terminal of the second voltage divider structure is grounded. The first voltage divider structure is electrically connected between one end of the second switch structure and the first output terminal of the first switch structure. When the USB-C interface device is in a standard power range charging state, it indicates the voltage on the power input line (hereinafter referred to as voltage). When the power input line voltage is low, it will not damage the power transmission chip. In this case, the input and output terminals of the first switch structure are connected, and the power transmission chip is electrically connected to the power input line through the input and output terminals of the first switch structure to detect the power input line voltage, ensuring the normal detection function of the power transmission chip for the power input line voltage. However, when the USB-C interface device is in extended power range charging mode, the surface power input line voltage is higher. In this case, the input and output terminals of the first switch structure are connected, and the power transmission chip detects the power input line voltage after being divided by the first and second voltage divider structures, which can prevent high voltage on the power input line from damaging the power transmission chip. The power transmission chip disclosed in this invention can be used in both standard power range charging scenarios and extended power range charging scenarios without the need for high-voltage fabrication processes, ensuring a low overall process cost for USB-C interface devices and solving the problem of high cost for PD chips that meet EPR charging scenarios in existing technologies. Attached Figure Description

[0018] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure. In the drawings:

[0019] Figure 1 shows a schematic diagram of the structure of a USB-C interface device provided in an embodiment of the present disclosure;

[0020] Figure 2 shows a schematic diagram of the structure of another USB-C interface device provided according to an embodiment of the present disclosure.

[0021] The above figures include the following reference numerals: 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 Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] To enable those skilled in the art to better understand the present disclosure, the technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present disclosure.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] As described in the background section, the existing technology has the problem of high cost of PD chips that meet EPR charging scenarios. In order to solve the above technical problem, the embodiments of this disclosure provide a USB-C interface device and a USB-C interface system.

[0026] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0027] Embodiments of this disclosure provide a USB-C interface device. FIG1 exemplarily illustrates a structural schematic diagram of a USB-C interface device. As shown in FIG1, the USB-C interface device includes:

[0028] Power transfer (PD) chip 10;

[0029] USB-C connector 11 is communicatively connected to the aforementioned power transmission chip 10;

[0030] 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 used to electrically connect to a power-generating device (such as a mobile phone, 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.

[0031] The power input line receiving module 12 includes a first switch structure 121, a first voltage divider structure 122, and a second voltage divider structure 123. The first switch structure 121 includes an input terminal, a first output terminal, and a second output terminal. The input terminal of the first switch structure 121 is electrically connected to the power transmission chip 10. The first output terminal of the first switch structure 121 is used to electrically connect to the USB-C connector 11 via the power input line Vbus. The second output terminal of the first switch structure 121 is electrically connected to the first terminal of the first voltage divider structure 122. The second terminal of the first voltage divider structure 122 is electrically connected to the first output terminal of the first switch structure 121. The first terminal of the second voltage divider structure 123 is electrically connected to the first terminal of the first voltage divider structure 122. The second terminal of the second voltage divider structure 123 is grounded.

[0032] Specifically, the first output terminal of the first switch structure 121, the power input line Vbus, and the USB-C connector 11 are sequentially electrically connected, and the second terminal of the first voltage divider structure 122, the power input line Vbus, and the USB-C connector 11 are sequentially electrically connected. The first voltage divider structure 122 is electrically connected between the first output terminal and the second output terminal of the first switch structure 121, and the second voltage divider structure 123 is electrically connected between the second output terminal of the first switch structure 121 and ground.

[0033] Specifically, when the USB-C interface device is in a standard power range charging state, the input terminal of the first switch structure 121 is connected to the first output terminal and not connected to the second output terminal, so that the power transmission chip 10 detects the voltage value of the power input line Vbus through the first output terminal of the first switch structure 121; when the USB-C interface device is in an extended power range charging state, the input terminal of the first switch structure 121 is connected to the second output terminal and not connected to the first output terminal, so that the power transmission chip 10 detects the voltage value through the second output terminal of the first switch structure 121.

[0034] Specifically, the aforementioned Standard Power Range (SPR) charging state refers to the USB-C interface device being in a charging state and the charging specifications meeting the aforementioned Standard Power Range; the aforementioned Extended Power Range (EPR) charging state refers to the USB-C interface device being in a charging state and the charging specifications meeting the aforementioned Extended Power Range. The charging voltage of the aforementioned Extended Power Range is greater than the charging voltage of the aforementioned Standard Power Range. When the input terminal and the first output terminal of the aforementioned first switch structure 121 are connected but the input terminal and the second output terminal are not connected, the aforementioned power transmission chip 10 is directly connected to the aforementioned power input line Vbus and detects the voltage on the aforementioned power input line Vbus; when the input terminal and the second output terminal of the aforementioned first switch structure 121 are connected but the input terminal and the first output terminal are not connected, the voltage detected by the aforementioned power transmission chip 10 is the voltage value after being divided by the aforementioned first voltage divider structure 122 and the aforementioned second voltage divider structure 123, and this voltage value is less than the voltage on the aforementioned power input line Vbus.

[0035] Through the above embodiments, this disclosure provides a first switch structure, a first voltage divider structure, and a second voltage divider structure in the power input line receiving module. A power transmission chip is electrically connected to one end of the power input line through the input and first output terminals 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 divider structure through the input and second output terminals of the first switch structure. The second terminal of the second voltage divider structure is grounded. The first voltage divider structure is electrically connected between one end of the second switch structure and the first output terminal of the first switch structure. When the USB-C interface device is in a standard power range charging state, this indicates the voltage on the power input line (hereinafter referred to as voltage). When the power input line voltage is low, it will not damage the power transmission chip. In this case, the input and output terminals of the first switch structure are connected, and the power transmission chip is electrically connected to the power input line through the input and output terminals of the first switch structure to detect the power input line voltage, ensuring the normal detection function of the power transmission chip for the power input line voltage. However, when the USB-C interface device is in extended power range charging mode, the surface power input line voltage is higher. In this case, the input and output terminals of the first switch structure are connected, and the power transmission chip detects the power input line voltage after being divided by the first and second voltage divider structures, which can prevent high voltage on the power input line from damaging the power transmission chip. The power transmission chip disclosed in this invention can be used in both standard power range charging scenarios and extended power range charging scenarios without the need for high-voltage fabrication processes, ensuring a low overall process cost for USB-C interface devices and solving the problem of high cost for PD chips that meet EPR charging scenarios in existing technologies.

[0036] 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 charging device charges the internal charging chip or battery.

[0037] In one alternative embodiment, as shown in Figures 1 and 2, the power input line receiving module 12 further includes a second switch structure 124. The second terminal of the second voltage divider structure 123 is grounded through the second switch structure 124. When the power transmission chip 10 is in the standard power range charging state, the second switch structure 124 is open; when the power transmission chip 10 is in the extended power range charging state, the second switch structure 124 is on. That is, the second switch structure 124 is connected in series between the second voltage divider structure 123 and ground. When the power transmission chip 10 is in the extended power range charging state, the branch from the second output terminal of the first switch structure 121 to ground via the first voltage divider structure 122 and the second voltage divider structure 123 is on, and at this time, the first voltage divider structure 122 and the second voltage divider structure 123 function as voltage dividers. When the power transmission chip 10 is in the standard power range charging state, the branch from the first output terminal of the first switch structure 121 to ground via the first voltage divider structure 122 and the second voltage divider structure 123 is off. This avoids leakage current on the power input line Vbus during charging within the standard power range, which occurs through the first and second voltage divider structures, further ensuring the safety of USB-C interface devices.

[0038] In this disclosure, the first switch structure 121 further includes a control terminal (not shown in the figure), the power transmission chip 10 includes a power transmission controller (not shown in the figure), and the power input line receiving module 12 further includes a control module (not shown in the figure). The power transmission controller is communicatively connected to both the USB-C connector 11 and the control module. The control module is electrically connected to the control terminal of the first switch structure 121. When the USB-C connector 11 is connected to a charging device, it sends a charging status signal to the power transmission controller. The charging status signal is either a signal indicating that the USB-C interface device is in the standard power range charging state, or a signal indicating that the USB-C interface device is in the extended power range charging state. 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 terminal of the first switch structure 121 to be connected to the first output terminal and not connected to the second output terminal. The second signal is used to instruct the control module to control the input terminal of the first switch structure 121 to be connected to the second output terminal and not connected to the first output terminal.

[0039] In the above embodiments, when the USB-C connector is connected to a charging device, a charging status signal is sent to the power transmission controller. The power transmission controller determines whether the USB-C interface device is currently charging in the standard power range or the extended power range. If it is charging in the standard power range, the power transmission controller sends a first signal to the control module. The control module then controls the first switch structure to conduct between its input and first output terminals and de-conduct between its input and second output terminals, thus directly connecting the power transmission chip to the power input line. If it is charging in the extended power range, the power transmission controller sends a second signal to the control module. The control module then controls the first switch structure to conduct between its input and second output terminals and de-conduct between its input and first output terminals, thus grounding the power transmission chip through the second switch structure. Through communication between the power transmission controller and the USB-C connector, the current status of the USB-C interface device can be automatically determined, and control of the first switch structure can be automatically triggered based on the determined current status.

[0040] Specifically, as shown in Figure 2, the power transmission controller and the USB-C connector 11 communicate via the CC1 and CC2 signal lines to exchange charging status signals. In addition, as shown in Figure 2, the power transmission controller and the USB-C connector 11 also transmit audio and other data via the SBU1 and SBU2 signal lines.

[0041] Optionally, as shown in FIG2, the power transmission chip 10 further includes a third switch structure 101. The power transmission controller is electrically connected to the control terminal of the third switch structure 101. The input terminal of the third switch structure 101 is used to connect to the power supply 13. The output terminal of the third switch structure 101 is electrically connected to the input terminal 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 terminal of the fourth switch structure 125. The first terminal of the fourth switch structure 125 is electrically connected to the USB-C connector 11 through the power input line Vbus. The second terminal of the fourth switch structure 125 is used to connect to the charger chip 1. 4. Electrical connection: When the USB-C connector 11 is connected to a power-drawing device, a power-drawing signal is sent to the power transmission controller. The power-drawing signal indicates that the USB-C interface device is in a power-drawing 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. 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 it receives the charging status signal. The first signal and the second signal are also used to instruct the control module to control the fourth switch structure 125 to close.

[0042] In the above embodiments, 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 open, causing the power transmission chip to disconnect 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, causing the control module to control the first output terminal or the second output terminal of the first switch structure to open, and simultaneously causing the control module to control the fourth switch structure to close. This allows the external charging device to be electrically connected to the charger chip sequentially through the USB-C connector, the power input line, and the fourth switch structure, thus enabling the external charging device to supply power to the internal charger chip. The charging effect: When the USB-C interface device is in a power-drawing state (i.e., the USB-C connector is connected to an external power-drawing device), the USB-C connector sends a power-drawing signal to the power transmission controller. The power transmission controller controls the third switch structure to close according to the power-drawing signal, so that the power supply sequentially connects to the external power-drawing device through the third switch structure, the first switch structure, the power input line, and the USB-C connector, realizing the effect of the internal power supply charging the external power-drawing device. In addition, the power transmission controller also sends a third signal to the control module to instruct the fourth switch structure to be opened, so that the line between the external charging device, the USB-C connector, the power input line and the charger chip is disconnected.

[0043] The control module is also electrically connected to the control terminal of the second switch structure. When the first signal is received, the control module controls the second switch structure to open through the control terminal of the second switch structure. When the second signal is received, the control module controls the second switch structure to open through the control terminal of the second switch structure.

[0044] Specifically, the power supply described above is used to provide a 5V / 3A electrical signal. The second switch structure, the third switch structure, and the third switching structure described above can be any suitable switching device, including but not limited to MOSFETs, transistors, or other semiconductor transistors.

[0045] In practical applications, both the first voltage divider structure 122 and the second voltage divider structure 123 can be any suitable voltage divider device, including but not limited to: resistors, inductors, capacitors, and at least some of diodes. The device types of the first voltage divider structure 122 and the second voltage divider structure 123 can be the same, for example, both being resistors; or the device types of the first voltage divider structure 122 and the second voltage divider structure 123 can be different, for example, the first voltage divider structure 122 is a resistor, and the second voltage divider structure 123 is a resistor-capacitor voltage divider.

[0046] According to some exemplary embodiments of this disclosure, the resistance of the first voltage divider structure 122 and the resistance of the second voltage divider structure 123 are both 1 kΩ to 1 MΩ. For example, the resistance of the first voltage divider structure 122 can be 1 kΩ, 10 kΩ, 100 kΩ, 300 kΩ, or 1 MΩ, etc.; for example, the resistance of the second voltage divider structure 123 can be 1 kΩ, 10 kΩ, 100 kΩ, 500 kΩ, or 1 MΩ, etc.; the resistance of the first voltage divider structure 122 is greater than the resistance of the second voltage divider structure 123. In this embodiment, by setting the resistance range of the first and second voltage divider structures, it is possible to avoid the problem that excessively large resistance values ​​of the first and second voltage divider structures would cause a significant drop in the voltage on the power input line Vbus after voltage division, thus affecting the detection accuracy of the power transmission chip. Conversely, it is also possible to avoid the problem that excessively small resistance values ​​of the first and second voltage divider structures would result in poor voltage division. Furthermore, since the power transmission chip detects the voltage across the second voltage divider structure when the USB-C interface device is in extended power range charging mode, setting the resistance of the first voltage divider structure to be greater than that of the second voltage divider structure can further prevent high voltage on the power input line from damaging the power transmission chip. This allows the power transmission chip to be applied to EPR scenarios while maintaining its original design capabilities, greatly reducing the cost of the device.

[0047] Furthermore, the ratio of the resistance of the second voltage divider structure 123 to the total resistance is less than or equal to 0.4, where the total resistance is the sum of the resistances of the first voltage divider structure 122 and the second voltage divider structure 123. Since standard power range charging scenarios require the Vbus pin of the power transfer chip to withstand a voltage of not less than 24V (20V+20%), and extended power range charging scenarios require the Vbus pin of the power transfer chip to withstand a voltage of not less than 55V (48V+20%), by setting the ratio of the resistance of the second voltage divider structure to the total resistance to be less than or equal to 0.4, it is ensured that the voltage detected by the power transfer chip in extended power range charging scenarios will not exceed 22V. This value is lower than the 24V Vbus pin voltage requirement of the power transfer chip in standard power range charging scenarios, further ensuring that the power transfer chip of this disclosure is suitable for EPR designs.

[0048] The Vbus pin of the power transmission chip is the pin of the power transmission chip that is electrically connected to the input terminal of the first switch structure 121.

[0049] Those skilled in the art can choose any suitable switching device as the first switching structure 121 described above.

[0050] In one 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, control is achieved such that when the USB-C interface device is in a standard power range charging state, the input terminal and the first output terminal of the first switch structure are connected, while the input terminal and the second output terminal are not connected; and when the USB-C interface device is in an extended power range charging state, control is achieved such that when the USB-C interface device is in an extended power range charging state, the input terminal and the second output terminal of the first switch structure are connected, while the input terminal and the first output terminal are not connected.

[0051] Furthermore, the first switch structure 121 described above can be a single-pole double-throw switch.

[0052] In another exemplary embodiment, the first switch structure 121 includes: a MOSFET, one of the source and drain of the MOSFET being the input terminal of the first switch structure 121, and the other of the source and drain of the MOSFET being the first output terminal of the first switch structure 121; and a transistor, one of the collector and emitter of the transistor being the input terminal of the first switch structure 121, and the other of the collector and emitter of the transistor being the second output terminal of the first switch structure 121, wherein the control terminals of the MOSFET and the transistor constitute the control terminal of the first switch structure 121. In this embodiment, a MOSFET is used to connect between the power transmission chip and the power input line. MOSFETs have the characteristics of low on-resistance and low driving power, which can ensure a small on-state voltage drop from the input end to the first output end of the first switching structure when the USB-C interface device is in the standard power range charging state. A transistor is used to connect between the power transmission chip and the first end of the second switching structure. Transistors have the characteristics of fast switching speed and low cost, which can realize rapid conduction between the power transmission chip and the power input line when the USB-C interface device is in the standard power range charging state, saving the overall cost of the device. The use of MOSFETs and transistors can also ensure that the overall area occupied by the first switching structure is small, which is beneficial to the integration and miniaturization of the device.

[0053] For example, the resistance of the aforementioned MOSFET is less than 10 milliohms. The aforementioned MOSFET can handle a current of 3A; due to its low resistance, the voltage drop between the power transfer chip and the power input line support can be minimized when current flows. The aforementioned transistor can handle a current of less than 1mA.

[0054] Furthermore, the aforementioned first switching structure can be communicated between the aforementioned MOSFET and the aforementioned transistor. The control terminals of both the MOSFET and the aforementioned transistor are connected to the control module, and the control module controls the high and low level signals sent to the control terminals of the MOSFET and the aforementioned transistor to control the closing or opening of the MOSFET and the aforementioned transistor.

[0055] Specifically, the aforementioned MOSFET can be a PMOS, with its source being the input terminal of the first switch structure 121 and its drain being the first output terminal of the first switch structure 121. Alternatively, the aforementioned MOSFET can be an NMOS, with its drain being the input terminal of the first switch structure 121 and its source being the first output terminal of the first switch structure 121.

[0056] In addition to the above embodiments, in another exemplary embodiment, the first switch structure includes: a first MOS, the input terminal of which is the input terminal of the first switch structure, and the output terminal of which is the first output terminal of the first switch structure; a second MOS, the conductivity type of which is different from that of the first MOS, i.e., when the first MOS is a PMOS, the second MOS is an NMOS, and when the first MOS is an NMOS, the second MOS is a PMOS; the input terminal of the second MOS is electrically connected to the input terminal of the first MOS; the control terminal of the second MOS is electrically connected to the control terminal of the first MOS; the output terminal of the second MOS is the second output terminal of the first switch structure; and the control module is electrically connected to the control terminal of the second MOS. The control module can control the first MOS to turn on and simultaneously control the second MOS to turn off, or control the first MOS to turn off and simultaneously control the second MOS to turn on, by using a single signal, simplifying the control logic of the control module for the first switch structure.

[0057] In this disclosure, when the USB-C interface device is charging within the standard power range, the power transmission chip directly detects the voltage on the power input line. If the detected voltage value is inconsistent with the standard power range specification, specifically, when the detected voltage value is higher than the specification, the power transmission controller sends a corresponding signal to the USB-C connector, causing the USB-C connector to disconnect from the external charging device; when the detected voltage value is lower than the specification, the power transmission controller sends a corresponding signal to the USB-C connector, causing the USB-C connector to perform some preset measures to adjust the voltage on the power input line to conform to the specification.

[0058] When the USB-C interface device is in the extended power range charging state, the power transmission chip detects the voltage value after voltage division by the second voltage divider structure. Based on this voltage value and the ratio of the resistance of the second voltage divider structure to the total resistance, the detected voltage value on the power input line is calculated. If the detected voltage value is inconsistent with the standard power range specification, specifically, when the detected voltage value is higher than the specification, the power transmission controller sends a corresponding signal to the USB-C connector, causing the USB-C connector to disconnect from the external charging device; when the detected voltage value is lower than the specification, the power transmission controller sends a corresponding signal to the USB-C connector, causing the USB-C connector to perform some preset measures to make the voltage on the adjusted power input line conform to the specification.

[0059] Embodiments of this disclosure also provide a USB-C interface system, as shown in FIG2, wherein the USB-C interface system includes:

[0060] Any of the above-mentioned USB-C interface devices;

[0061] The charger chip 14 is electrically connected to the USB-C connector 11 in the USB-C interface device via the power input line receiving module 12 in the USB-C interface device.

[0062] In the aforementioned USB-C interface system, the USB-C interface device incorporates a first switch structure, a first voltage divider structure, and a second voltage divider structure in its power input line receiving module. A power transmission chip is electrically connected to one end of the power input line via the input and first output terminals 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 also connected to one end of the second voltage divider structure via the input and second output terminals of the first switch structure. The second terminal of the second voltage divider structure is grounded. The first voltage divider structure is electrically connected between one end of the second switch structure and the first output terminal of the first switch structure. When the USB-C interface device is charging within its standard power range, this indicates that the power supply... When the input line voltage is low, it will not damage the power transmission chip. At this time, the input and output terminals of the first switch structure are connected, and the power transmission chip is electrically connected to the power input line through the input and output terminals of the first switch structure to detect the power input line voltage, ensuring the normal detection function of the power transmission chip for the power input line voltage. However, when the USB-C interface device is in extended power range charging mode, the surface power input line voltage is higher. At this time, the input and output terminals of the first switch structure are connected, and the power transmission chip detects the power input line voltage after being divided by the first and second voltage divider structures, which can prevent high voltage on the power input line from damaging the power transmission chip. The power transmission chip disclosed in this invention can be used in both standard power range charging scenarios and extended power range charging scenarios without the need for high-voltage fabrication processes, ensuring a lower overall manufacturing cost for USB-C interface devices. This solves the problem of high cost of PD chips for EPR charging scenarios in existing technologies, ensuring a lower manufacturing cost for USB-C interface systems.

[0063] In addition, as shown in Figure 2, the USB-C interface system also includes a power supply 13, and the input terminal of the third switch structure 101 in the power input line receiving module 12 is electrically connected to the power supply 13.

[0064] Specifically, the power supply is used to provide a 5V / 3A electrical signal.

[0065] It is obvious to those skilled in the art that the modules or steps of this disclosure described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, this disclosure is not limited to any particular combination of hardware and software.

[0066] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0067] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0068] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0069] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0070] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0071] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0072] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, 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 technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0073] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0074] As can be seen from the above description, the embodiments of this disclosure achieve the following technical effects:

[0075] The USB-C interface device disclosed herein includes a first switch structure, a first voltage divider structure, and a second voltage divider structure in the power input line receiving module. A power transmission chip is electrically connected to one end of the power input line via the input and first output terminals 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 also connected to one end of the second voltage divider structure via the input and second output terminals of the first switch structure. The second terminal of the second voltage divider structure is grounded. The first voltage divider structure is electrically connected between one end of the second switch structure and the first output terminal of the first switch structure. When the USB-C interface device is in a standard power range charging state, this indicates the voltage on the power input line (hereinafter referred to as...). When the power input line voltage is low, it will not damage the power transmission chip. At this time, the input and output terminals of the first switch structure are connected, and the power transmission chip is electrically connected to the power input line through the input and output terminals of the first switch structure to detect the power input line voltage, ensuring the normal detection function of the power transmission chip for the power input line voltage. However, when the USB-C interface device is in extended power range charging mode, the surface power input line voltage is higher. At this time, the input and output terminals of the first switch structure are connected, and the power transmission chip detects the power input line voltage after being divided by the first and second voltage divider structures, which can prevent high voltage on the power input line from damaging the power transmission chip. The power transmission chip disclosed in this invention can be used in both standard power range charging scenarios and extended power range charging scenarios without the need for high-voltage fabrication processes, ensuring a low overall process cost for USB-C interface devices and solving the problem of high cost for PD chips that meet EPR charging scenarios in existing technologies.

[0076] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A USB-C interface device, wherein, include: Power transfer chip; The USB-C connector is used for communication with the power transmission chip. A power input line receiving module includes a first switch structure, a first voltage divider structure, and a second voltage divider structure. The first switch structure includes an input terminal, a first output terminal, and a second output terminal. The input terminal of the first switch structure is electrically connected to the power transmission chip. The first output terminal of the first switch structure is used to electrically connect to the USB-C connector via a power input line. The second output terminal of the first switch structure is electrically connected to the first terminal of the first voltage divider structure. The second terminal of the first voltage divider structure is electrically connected to the first output terminal of the first switch structure. The first terminal of the second voltage divider structure is electrically connected to the first terminal of the first voltage divider structure. The second terminal of the second voltage divider structure is grounded. When the USB-C interface device is in a standard power range charging state, the input terminal and the first output terminal of the first switch structure are connected, while the input terminal and the second output terminal are not connected, so that the power transmission chip detects the voltage value of the power input line through the first output terminal of the first switch structure. When the USB-C interface device is in extended power range charging state, the input terminal and the second output terminal of the first switch structure are connected, while the input terminal and the first output terminal are not connected, so that the power transmission chip detects the voltage value through the second output terminal of the first switch structure.

2. The USB-C interface device of claim 1, wherein, The power input line receiving module further includes: The second switch structure has a second terminal grounded through it. When the power transmission chip is in the standard power range charging state, the second switch structure is open; when the power transmission chip is in the extended power range charging state, the second switch structure is on.

3. The USB-C interface device of claim 1, wherein, The resistors of the first voltage divider structure and the second voltage divider structure are both 1 kΩ to 1 MΩ, and the resistor of the first voltage divider structure is greater than the resistor of the second voltage divider structure.

4. The USB-C interface device of claim 1, wherein, The ratio of the resistance of the second voltage divider structure to the total resistance is less than or equal to 0.4, where the total resistance is the sum of the resistances of the first voltage divider structure and the second voltage divider structure.

5. The USB-C interface device of claim 1, wherein, The first switch structure includes: A MOS transistor, wherein one of the source and drain of the MOS transistor is the input terminal of the first switching structure, and the other of the source and drain of the MOS transistor is the first output terminal of the first switching structure; A transistor, wherein one of its collector and emitter is the input terminal of a first switching structure, and the other of its collector and emitter is the second output terminal of the first switching structure. The control terminals of the MOS transistor and the triode constitute the control terminals of the first switching structure.

6. The USB-C interface device of claim 5, wherein, The resistance of the MOS transistor is less than 10 milliohms.

7. The USB-C interface device of claim 1, wherein, 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, wherein, The first switch structure further includes a control terminal; 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 both the USB-C connector and the control module; and the control module is electrically connected to the control terminal of the first switch structure. When a charging device is connected to the USB-C connector, a charging status signal is sent to the power transmission controller. When the charging status signal indicates that the USB-C interface device is in the charging state of the standard power range, 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 terminal of the first switch structure to be connected to the first output terminal and not connected to the second output terminal. The second signal is used to instruct the control module to control the input terminal of the first switch structure to be connected to the second output terminal and not connected to the first output terminal.

9. The USB-C interface device according to claim 8, wherein, The power transmission chip further includes a third switch structure. The power transmission controller is electrically connected to the control terminal of the third switch structure. The input terminal of the third switch structure is used to connect to a power source, and the output terminal of the third switch structure is electrically connected to the input terminal 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 terminal of the fourth switch structure. The first terminal of the fourth switch structure is electrically connected to the USB-C connector via the power input line, and the second terminal of the fourth switch structure is used to connect to the charger chip. When a power-generating device is connected to the USB-C connector, a power-generating signal is sent to the power transmission controller, causing the power transmission controller to control the third switch structure to close, and a third signal is sent to the control module, the third signal being 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 upon 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.

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

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