Equipment interface circuit, vehicle-mounted equipment and vehicle

Abstract

The embodiment of the utility model provides an equipment interface circuit, vehicle-mounted equipment and a vehicle, and the circuit comprises a peripheral interface which is connected with peripheral equipment; the first power supply chip is connected with the peripheral interface through the first charging protection device; the second power supply chip is connected with the peripheral interface through a second charging protection device, and the charging protocol supported by the second power supply chip is different from the charging protocol supported by the first power supply chip; and the central control chip is respectively connected with the first power supply chip and the second power supply chip and is set to control the operation states of the first power supply chip and the second power supply chip. The technical problem that the service time of peripheral equipment is short due to the fact that the function of an equipment interface is single in the prior art is solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of electronic device interface, and in particular to a device interface circuit, a vehicle-mounted device and a vehicle. BACKGROUND

[0002] With the development of automobile intelligence and entertainment, the vehicle-mounted entertainment system has become an indispensable part of modern cars. In order to meet the entertainment needs of drivers and passengers during driving, the vehicle-mounted entertainment system needs to be able to connect various types of electronic devices, including smartphones, tablets, game consoles and laptops, to realize data transmission, video projection and charging and other functions. Under this background, the Type C interface (Universal Serial Bus Type-C interface) gradually becomes the preferred connection for these devices due to its advantages of supporting positive and negative insertion, high-speed data transmission, video transmission and providing large charging power.

[0003] However, the current use of Type C interface in vehicle-mounted entertainment systems mainly focuses on data communication or charging functions, lacks integrated support for multiple devices and protocols, resulting in a single function of the Type C interface in the current vehicle-mounted entertainment system, poor interface compatibility, difficulty in providing charging services for a variety of different peripheral devices, and thus leading to a shorter use time of a variety of different peripheral devices and poor user experience. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a device interface circuit, a vehicle-mounted device and a vehicle, aiming to improve the problem of poor user experience caused by single function of the device interface in the related art.

[0005] The device interface circuit provided by the embodiments of the present application includes: an external device interface connected with an external device; a first power supply chip connected with the external device interface through a first charging protection device; a second power supply chip connected with the external device interface through a second charging protection device, wherein the charging protocol supported by the second power supply chip is different from the charging protocol supported by the first power supply chip; and a central control chip connected with the first power supply chip and the second power supply chip respectively, configured to control the running state of the first power supply chip and the second power supply chip.

[0006] The above optional embodiments of the present application can achieve the following beneficial effects: first, the peripheral interface is connected with the peripheral device; then, the first power supply chip is connected with the peripheral interface through the first charging protection device; then, the second power supply chip is connected with the peripheral interface through the second charging protection device, wherein the charging protocol supported by the second power supply chip is different from the charging protocol supported by the first power supply chip; finally, the central control chip is connected with the first power supply chip and the second power supply chip, respectively, and is configured to control the running state of the first power supply chip and the second power supply chip. Wherein, the first power supply chip and the second power supply chip support different charging protocols, so that the host device can adapt to a wider range of device types, and the connection of the first chip enable interface and the central control chip enables the central control chip to dynamically control the function of the peripheral interface. In addition, the connection of the first signal transmission end and the peripheral interface, and the connection of the second signal transmission end and the central control chip ensure the high speed and stability of data communication. Through the above design, the purpose of multifunctional integration of the device interface is achieved, and the technical effect of improving the endurance time of various different peripheral devices is achieved, solving the technical problem of short use time of peripheral devices caused by single function of device interface in related technology.

[0007] Further, the first power supply chip includes: a first power supply output end, a first chip enable interface, a first signal transmission end and a second signal transmission end, wherein the first power supply output end is connected with the first end of the peripheral interface through the first charging protection device, the first chip enable interface is connected with the first end of the central control chip, the first signal transmission end is connected with the second end of the peripheral interface, and the second signal transmission end is connected with the second end of the central control chip.

[0008] The above optional embodiments of the present application can achieve the following beneficial effects: through the cooperation of the first power supply output end and the first charging protection device, different types of peripheral devices (such as mobile phones, tablets, game consoles, etc. supporting different charging protocols) can obtain safe and stable power supply when connected to the peripheral interface, while preventing device damage caused by power mismatch or reverse current, enhancing the compatibility and safety of the device interface. In addition, the connection of the first chip enable interface and the central control chip enables the central control chip to dynamically control the function of the peripheral interface. This intelligent control mechanism improves the flexibility and efficiency of the device interface, thereby improving the use time of the peripheral device.

[0009] Further, the first charging protection device includes: a first diode, the cathode of the first diode is connected with the first end of the peripheral interface, and the anode of the first diode is connected with the first power supply output end.

[0010] The optional embodiment of the present application can achieve the following beneficial effects: by introducing the first diode, the current from the external device is effectively prevented from flowing reversely into the vehicle-mounted system. Due to the unidirectional conduction characteristic of the diode, when the voltage of the external device is higher than the power supply voltage of the vehicle-mounted system, the diode will prevent the current from flowing reversely, thereby protecting the vehicle-mounted system from potential power damage.

[0011] Further, the second power supply chip comprises a second power supply output end and a second chip enable end, wherein the second power supply output end is connected with the first end of the external device interface through the second charging protection device, and the second chip enable end is connected with the third end of the central control chip.

[0012] The optional embodiment of the present application can achieve the following beneficial effects: the second power supply output end is connected with the external device interface through the second charging protection device, which can provide more efficient charging service for high-power devices (such as notebook computers, high-performance tablets, etc.) supporting different charging protocols, thereby prolonging the use time of the external device.

[0013] Further, the second charging protection device further comprises a second diode, wherein the cathode of the second diode is connected with the first end of the external device interface, and the anode of the second diode is connected with the second power supply output end.

[0014] The optional embodiment of the present application can achieve the following beneficial effects: by introducing the second diode, it is ensured that the current can only flow from the second power supply chip to the external device, but cannot flow reversely, thereby effectively preventing potential damage to the power supply of the vehicle-mounted system due to the abnormal state (such as internal short circuit) of the external device. In addition, the isolation effect of the diode reduces the interference between different power outputs, improves the stability and safety of the vehicle-mounted system, and provides protection for charging of various different external devices.

[0015] Further, the device interface circuit further comprises a signal conversion chip connected with the external device interface, the second power supply chip and the central control chip respectively, and configured to determine the target charging protocol corresponding to the external device.

[0016] The optional embodiment of the present application can achieve the following beneficial effects: the signal conversion chip can automatically identify the charging protocol type supported by the device connected with the external device interface, and intelligently convert the signal based on the identification result, thereby ensuring that the external device and the vehicle-mounted system adopt a more appropriate and efficient charging protocol for charging, greatly improving the compatibility and efficiency of charging, and thereby prolonging the use time of the external device.

[0017] Further, the signal conversion chip comprises a configuration channel pin, a digital display interface, a video serial interface and an audio serial interface, wherein the configuration channel pin is connected with the third end of the peripheral interface, the digital display interface is connected with the fourth end of the peripheral interface, the video serial interface is connected with the third end of the central control chip, and the audio serial interface is connected with the fourth end of the central control chip.

[0018] The above optional embodiments of the present application can achieve the following beneficial effects: the signal conversion chip is connected with the third end of the peripheral interface through the configuration channel pin, can intelligently identify the signal transmission protocol adopted by the peripheral device, and this identification capability enables the vehicle-mounted system to seamlessly switch to a suitable signal conversion mode, compatible with various types of peripheral devices such as game consoles, notebook computers or tablet computers, thereby greatly expanding the application range of the vehicle-mounted entertainment system.

[0019] Further, the signal conversion chip further comprises a first integrated circuit interconnection interface, and the second power supply chip further comprises a second integrated circuit interconnection interface, wherein the first integrated circuit interconnection interface is connected with the second integrated circuit interconnection interface, and the signal conversion chip is configured to send the signal of the target charging protocol to the second power supply chip.

[0020] The above optional embodiments of the present application can achieve the following beneficial effects: the direct connection of the first integrated circuit interconnection interface and the second integrated circuit interconnection interface builds a fast and low-power communication bridge, based on which the signal conversion chip can instantly transmit the recognized target charging protocol information (such as required charging voltage and current characteristics) to the second power supply chip, prompting the second power supply chip to quickly adjust its power output to meet the requirements of the target charging protocol. This instant communication mechanism significantly improves the efficiency and response speed of the charging process, thereby prolonging the use time of the peripheral device.

[0021] The embodiments of the present application provide a vehicle-mounted device, which comprises the device interface circuit in the embodiments of the present application.

[0022] The embodiments of the present application provide a vehicle, which comprises the vehicle-mounted device in the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of a device interface circuit provided by an embodiment of the present application;

[0024] Figure 2 is a system architecture diagram of an optional device interface provided by an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present application clearer, the present application will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0026] The Type C interface in the related art is usually focused on a certain specific function, such as data transmission, charging or video transmission. For example, some car cockpit entertainment systems may be equipped with a Type C interface for charging or as a USB (Universal Serial Bus) 2.0 data communication port, but do not have the ability to simultaneously perform video transmission and charging. At present, in order to solve the problem of single function of Type C interface, there are various external adapters or converters on the market, which can convert Type C interface into USB, HDMI (High Definition Multimedia Interface) or other types of interfaces to realize additional functions. However, this solution increases the complexity and cost of in-vehicle devices, and is inconvenient to use.

[0027] Some nouns or terms appearing in the process of describing the embodiments of the present application below are applicable to the following explanations:

[0028] Charging protocol: The charging protocol is a set of rules and standards used between electronic devices to negotiate and control the charging process. It defines the communication method between the charger and the charged device, and how to safely and effectively transmit power. The importance of the charging protocol lies in ensuring the compatibility, safety and efficiency of the charging process, avoiding device damage, and meeting the charging needs of different devices. Common charging protocols include BC (Battery Charging) protocol, PD (Power Delivery) protocol, etc.

[0029] BC protocol: mainly used for USB charging, including BC1.1, BC1.2 and other versions. The BC1.2 protocol can support a maximum charging current of 5V / 1.5A.

[0030] PD protocol: supports charging power up to 100W, and allows devices to dynamically adjust voltage and current during charging to match the actual charging needs of the device. The PD protocol communicates through the configuration channel of the USB Type-C interface and is widely used in the charging of high-power devices such as laptops, tablets and game consoles.

[0031] Configuration Channel (CC): A bidirectional communication channel used to exchange configuration information and status data between connected devices. When two Type-C devices are connected, the configuration channel allows devices to perform handshake communication to identify the types of devices, roles, and supported functions. This exchange of information is the basis for implementing the PD protocol, ensuring that devices can correctly negotiate charging parameters and data transmission modes.

[0032] Cockpit System on Chip (Cockpit SOC): A central processing unit that integrates multiple functions, designed to provide computing, control, and data processing capabilities for various electronic devices and applications in the automotive cockpit, such as infotainment systems, instrument clusters, navigation systems, and vehicle communication systems.

[0033] Camera Serial Interface (CSI): A high-speed serial communication interface standard used to connect camera modules and processors, commonly used in mobile devices (such as smartphones and tablets), automotive electronics (including smart cockpit systems), and other fields. The CSI interface can support the transmission of high-resolution image and video data, while having low power consumption and wiring complexity.

[0034] Inter-IC Sound (I2S): A protocol used to transmit digital audio signals between integrated circuits (such as audio codecs, digital signal processors, microcontrollers, etc.). It uses a serial bus structure to transmit multiple channels of digital audio data simultaneously, supporting stereo or more complex multi-channel audio formats.

[0035] Voltage Bus (Vbus): In the USB interface standard, Vbus is a signal line used for power transmission, allowing the USB host to power connected devices.

[0036] Display Port (DP): A standard for transmitting video and audio signals, supporting high-resolution video output, and achieving high resolution. It can also transmit multi-channel audio, including uncompressed audio formats.

[0037] The device interface circuit provided in the embodiment of the application comprises: a peripheral interface connected with a peripheral device; a first power supply chip connected with the peripheral interface through a first charging protection device; a second power supply chip connected with the peripheral interface through a second charging protection device, wherein the charging protocol supported by the second power supply chip is different from the charging protocol supported by the first power supply chip; and a central control chip connected with the first power supply chip and the second power supply chip respectively and configured to control the running state of the first power supply chip and the second power supply chip.

[0038] In the above embodiment, by connecting the peripheral interface with the peripheral device, connecting the first power supply chip with the peripheral interface through the first charging protection device, connecting the second power supply chip with the peripheral interface through the second charging protection device, and connecting the central control chip with the first power supply chip and the second power supply chip respectively to control the running state of the first power supply chip and the second power supply chip, the host device can be adapted to a wider range of device types, and the central control chip can dynamically control the function of the peripheral interface, ensuring the high speed and stability of data communication, achieving the purpose of multifunctional integration of the device interface, realizing the technical effect of improving user experience, and solving the technical problem of poor user experience caused by single function of the device interface in the related art.

[0039] Embodiment one

[0040] The device interface circuit provided in the embodiment of the application comprises: a peripheral interface connected with a peripheral device; a first power supply chip connected with the peripheral interface through a first charging protection device; a second power supply chip connected with the peripheral interface through a second charging protection device, wherein the charging protocol supported by the second power supply chip is different from the charging protocol supported by the first power supply chip; and a central control chip connected with the first power supply chip and the second power supply chip respectively and configured to control the running state of the first power supply chip and the second power supply chip. Figure 1

[0041] The peripheral interface 102, the peripheral device 104, the first power supply chip 106, the first charging protection device 108, the second power supply chip 110, the second charging protection device 112, and the central control chip 114.

[0042] The peripheral interface 102 is connected with the peripheral device 104.

[0043] The peripheral device can be connected to the host device to expand the function of the host device or provide additional input and output capability. For example, the peripheral device can include at least one or more of a mobile phone, a game console, a computer, a tablet computer, and the like, but is not limited thereto.

[0044] In an optional embodiment, the peripheral interface can be a USB Type C interface, which can be connected with the peripheral device to enable the user to connect various electronic devices including a game console, a computer, a tablet computer, and a mobile phone through the same interface for high-speed charging and data transmission.

[0045] The first power supply chip 106 is connected with the peripheral interface 102 through the first charging protection device 108. ​

[0046] The first charging protection device can be an electronic component or circuit used to protect the peripheral device and the vehicle-mounted system from damage during charging.

[0047] In an alternative embodiment, the first power supply chip can be a BC1.2 charging protocol chip. Considering that improper management of current and voltage during charging can cause circuit overload, short circuit, or reverse current flow, which can cause damage to the first power supply chip, the first charging protection device, such as a diode circuit, has a one-way conduction characteristic that can prevent current from flowing back to the first power supply chip from the peripheral device, avoiding possible circuit failure or device damage. Therefore, the first power supply chip can be configured to interface with the peripheral device through the first charging protection device.

[0048] The second power supply chip 110 is configured to interface with the peripheral device 102 through the second charging protection device 112, wherein the second power supply chip supports a charging protocol different from the charging protocol supported by the first power supply chip.

[0049] The second charging protection device can be an electronic component or circuit used to protect the peripheral device and the vehicle-mounted system from damage during charging. The charging protocol can be a set of rules and standards used to negotiate and control the charging process between electronic devices. It defines the communication method between the charger and the charged device, as well as how to safely and effectively transfer power.

[0050] In an alternative embodiment, the second power supply chip can be a Buck-boost power supply chip. The second power supply chip is connected to the peripheral device through the second charging protection device, mainly to adapt to different types of peripheral devices, especially those that require higher power charging or support PD protocol. The second charging protection device ensures the safety and stability of the charging process, while the PD protocol provides more flexible charging power adjustment and wider device compatibility. Through such a configuration, the embodiment can provide users with comprehensive, intelligent, and efficient charging solutions to meet users' charging needs in various scenarios.

[0051] The central control chip 114 is connected to the first power supply chip 106 and the second power supply chip 110, respectively, and is configured to control the operating state of the first power supply chip and the second power supply chip.

[0052] In an alternative embodiment, the central control chip can be connected with the first power supply chip and the second power supply chip respectively. The central control chip can intelligently select a more suitable power supply chip by monitoring the type and demand of the peripheral device. For example, when a U disk or a mobile phone supporting BC1.2 protocol is inserted, the central control chip will activate the first power supply chip to provide a more suitable USB2.0 data transmission and BC1.2 charging scheme. For devices supporting PD protocol (such as computers, tablets, game consoles), the central control chip will switch to the second power supply chip to ensure the realization of high-power charging. This intelligent switching not only improves the compatibility of the system, but also provides a more suitable charging scheme for the characteristics of different devices, meeting the diversified needs.

[0053] In the above embodiment, by connecting the peripheral interface with the peripheral device, connecting the first power supply chip with the peripheral interface through the first charging protection device, connecting the second power supply chip with the peripheral interface through the second charging protection device, and connecting the central control chip with the first power supply chip and the second power supply chip respectively to control the running state of the first power supply chip and the second power supply chip, the host device can adapt to a wider range of device types, and the central control chip can dynamically control the function of the peripheral interface to ensure the high speed and stability of data communication, achieving the purpose of multifunctional integration of the device interface, realizing the technical effect of improving user experience, and solving the technical problem of short use time of the peripheral device caused by single function of the device interface in related technologies.

[0054] Further, the first power supply chip comprises a first power supply output end, a first chip enable interface, a first signal transmission end and a second signal transmission end, wherein the first power supply output end is connected with the first end of the peripheral interface through the first charging protection device, the first chip enable interface is connected with the first end of the central control chip, the first signal transmission end is connected with the second end of the peripheral interface, and the second signal transmission end is connected with the second end of the central control chip.

[0055] The first power supply output end can be a power supply output port of the first power supply chip, used to provide power to the connected peripheral device (such as a mobile phone, a U disk, etc.). The first chip enable interface can be an interface for receiving control signals of the central control chip to turn on or off the function of the first power supply chip, which can also be called an enable end or an EN (Enable) end. The first signal transmission end can be a port for transmitting data signals sent by the device to the first power supply chip or the central control chip to realize data reading and communication. The second signal transmission end can be a port connected with the second end of the central control chip for feeding back signals or state information.

[0056] In an alternative embodiment, the first power output end can be connected to the first end of the peripheral interface through the first charging protection device, so that the first charging protection device can effectively prevent reverse current flow and avoid damage caused by voltage difference in the internal circuit of the device, thereby ensuring power stability and device protection when providing charging function. The first chip enable interface is connected to the first end of the central control chip, making the first chip enable interface a controllable node in the entire power management. The central control chip can send control signals through the first chip enable interface to determine whether the first power chip starts to work. For example, when the game console video is projected, the central control chip will send signals through the first chip enable interface to turn off the first power chip, preventing crosstalk or device damage caused by inconsistent output voltage of the first power chip and the second power chip (used for PD charging). This intelligent control mechanism not only improves the safety of the system, but also avoids unnecessary power waste. The first signal transmission end is connected to the second end of the peripheral interface and is responsible for data signal transmission of USB2.0. The first signal transmission end ensures that when a peripheral device (such as a U disk or a mobile phone) is connected to the device interface, data communication compatibility can be achieved. For devices that do not support the BC1.2 charging protocol, the first signal transmission end can directly transmit data signals to the central control chip, which processes the data to realize U disk reading, mobile phone data transmission and other functions. This design enhances the support of the host device for USB2.0 devices and expands the application range of the device interface.

[0057] In the above embodiment, the first power chip can provide accurate charging current and voltage for the connected peripheral devices through the first power output end. The first charging protection device ensures one-way flow of current during charging, preventing reverse current from damaging the chip or peripheral device. At the same time, the voltage adjustment of the first power output end takes into account the voltage drop of the charging protection device, ensuring that the peripheral device can obtain standard charging voltage and improving charging efficiency to meet the charging needs of different peripheral devices.

[0058] Further, the first charging protection device comprises a first diode, a cathode of the first diode is connected to the first end of the peripheral interface, and an anode of the first diode is connected to the first power output end.

[0059] The first diode can be an electronic component with unidirectional conductivity, which is used to prevent reverse current flow and thus protect the first charging protection device from damage.

[0060] In an optional embodiment, the cathode of the first diode is connected to the first end of the peripheral interface, and the anode of the first diode is connected to the power output end of the first power chip. The unidirectional conductivity of the first diode is used to prevent the occurrence of reverse current, i.e., when the peripheral device is connected to the device interface, the current can only flow from the first power output end to the device, but cannot flow from the device to the circuit in the reverse direction. In this embodiment, this reverse protection mechanism is crucial to prevent circuit damage caused by device failure or abnormal conditions, especially in a vehicle environment where the access and use conditions of external devices are more complex and variable. The first diode provides an additional safety layer for the system.

[0061] In the above embodiment, the integrated design of the first diode reduces the need for additional circuit modules, simplifies the signal circuit of the device interface, and makes the overall layout of the device interface more compact. At the same time, as a standard electronic component, the first diode can be quickly replaced in case of failure or performance degradation, reducing maintenance costs and improving the maintainability of the vehicle entertainment system and the stability of peripheral device charging.

[0062] Further, the second power chip comprises a second power output end and a second chip enable end, wherein the second power output end is connected to the first end of the peripheral interface through the second charging protection device, and the second chip enable end is connected to the third end of the central control chip.

[0063] The second power output end can be a port for providing high-power charging to the connected peripheral device. The second chip enable end can be a port for receiving control signals from the central control chip to determine whether the second power chip is turned on or off.

[0064] In an optional embodiment, the second power output end of the second power chip is connected to the first end of the peripheral interface through the second charging protection device, providing an additional power output path for the vehicle-mounted system. This design enables the device interface to intelligently select a more suitable power chip for power supply according to the type and charging requirements of the peripheral device. For example, when the peripheral device is a device supporting the PD protocol, the second power chip can provide higher power charging services, while when the device only requires basic charging functions, the first power chip is sufficient to meet the demand. The flexibility of this mode enables the vehicle-mounted system to adapt to a wider range of device types and charging requirements, improving user satisfaction. In addition, the second chip enable end of the second power chip is connected to the third end of the central control chip, which realizes the direct control of the central control chip over the second power chip. For example, when recognizing that the peripheral device is inserted and needs to be charged using the PD protocol, the central control chip can quickly activate the second power chip through the second chip enable end, while ensuring that the charging function of the first power chip is timely turned off, avoiding voltage inconsistency and current conflict problems that may be caused by the simultaneous operation of the two power chips, ensuring the safety and efficiency of the charging process.

[0065] In the above embodiment, the design of the second power chip combines intelligent control, efficient charging, safety protection, and modular advantages, not only enhancing the flexibility and diversity of the device interface in power management, but also improving device compatibility and enhancing user experience.

[0066] Further, the second charging protection device further comprises a second diode, wherein the cathode of the second diode is connected to the first end of the peripheral interface, and the anode of the second diode is connected to the second power output end.

[0067] The above-mentioned second diode can be an electronic component with unidirectional conductivity, used to prevent reverse current flow and thus protect the above-mentioned second charging protection device from damage.

[0068] In an optional embodiment, the connection of the second charging protection device to the first end of the peripheral interface enables the second power output end to provide stable and efficient power supply while ensuring safety. The connection of the second chip enable end to the third end of the central control chip provides the central control chip with precise control capability over the second power chip. In different use scenarios, the central control chip can intelligently turn on or off the second power chip through the second chip enable end according to the device needs and system status, achieving dynamic management of the power supply.

[0069] For example, when the game console is video projection, avoid the output voltage conflict with the first power chip (responsible for BC1.2 protocol charging), the central control chip can disable the first power chip, and then activate the second power chip, to ensure that the game console can obtain the high power charging in accordance with the PD protocol, while performing the video projection function, this intelligent switching mechanism significantly improves the stability and safety of the system.

[0070] In the above embodiment, the second diode can serve as an intelligent bridge between the output of the second power chip and the peripheral device, ensuring that the current can be stably and safely delivered under different charging protocols (such as switching between PD and BC1.2 protocols), thereby improving the charging efficiency of the peripheral device.

[0071] Further, the device interface circuit further comprises a signal conversion chip connected with the peripheral interface, the second power chip and the central control chip respectively, configured to determine the target charging protocol corresponding to the peripheral device.

[0072] The above-mentioned signal conversion chip can be a chip for identifying and converting different signal formats to adapt to the communication needs of the connected peripheral device and the vehicle-mounted system.

[0073] In an optional embodiment, the above-mentioned signal conversion chip can adopt a DP to CSI chip, which is connected with the peripheral interface, the second power chip and the central control chip respectively. When different peripheral devices (such as mobile phones, tablets, laptops, game consoles, etc.) are connected to the device interface, the signal conversion chip can automatically detect the properties of the device and determine the charging protocol it supports. For example, a game console may need high-power PD charging, while a mobile phone may need BC1.2 protocol charging. The above-mentioned signal conversion chip can intelligently adjust the signal interaction between the second power chip according to the identification result of the device, and set the correct charging protocol, so as to ensure that the connected device can be charged in a more adaptive way.

[0074] In the above embodiment, the integration of the signal conversion chip not only ensures the intelligent identification and switching between different charging protocols, but also improves the power transmission efficiency, thereby shortening the charging time of the peripheral device and improving the use time of the peripheral device.

[0075] Further, the signal conversion chip comprises a configuration channel pin, a digital display interface, a video serial interface and an audio serial interface, wherein the configuration channel pin is connected with the third end of the peripheral interface, the digital display interface is connected with the fourth end of the peripheral interface, the video serial interface is connected with the third end of the central control chip, and the audio serial interface is connected with the fourth end of the central control chip.

[0076] The configuration channel pin can be an electronic element for identifying the type of connected device, role (i.e., source device or receiving device), and power supply capability. The digital display interface can be an interface for transmitting video and audio signals. The video serial interface can be an interface for high-speed data transmission between a camera module and an image processor. The audio serial interface can be an interface for transmitting uncompressed audio data between digital audio devices.

[0077] In an optional embodiment, the configuration channel pin is connected to the third end of the peripheral interface, providing a direct and efficient way for the vehicle system to identify the attributes and needs of the connected device. When the user inserts different devices, the CC pin can quickly detect whether the device supports BC1.2 protocol charging, USB2.0 data communication, or requires DP video projection and PD high-power charging. This instant identification capability enables the vehicle system to automatically adjust the charging mode and data transmission protocol. The digital display interface is connected to the fourth end of the peripheral interface, providing a high-speed and high-quality video transmission channel for devices such as game consoles and laptops. When the user performs video projection, the device sends video signals to the signal conversion chip through the digital display interface. After receiving these signals, the signal conversion chip converts them into a CSI format that the cabin SOC chip can handle, ensuring that the video signals can be transmitted to the vehicle display screen with good quality and smoothness. The video serial interface is connected to the third end of the central control chip, and the signal conversion chip transmits the converted video signals to the central control chip through the video serial interface, simplifying the signal transmission path in the vehicle system, reducing signal transmission delay and distortion, and reducing the processing burden of the cabin SOC chip. The audio serial interface is connected to the fourth end of the central control chip and is specifically used for transmitting audio signals. For example, the audio signals of a game console or a laptop enter the signal conversion chip through the digital display interface, are converted into an audio serial interface format, and are then transmitted to the cabin SOC chip for decoding and playback, ensuring high-quality transmission of audio signals.

[0078] In the above embodiment, the signal conversion chip, through the integrated design of the configuration channel pin, digital display interface, video serial interface, and audio serial interface, not only realizes intelligent conversion of charging protocols, but also supports efficient transmission and conversion of video and audio signals, significantly enhancing the compatibility and flexibility of device interfaces.

[0079] Further, the signal conversion chip further comprises a first integrated circuit interconnection interface, and the second power supply chip further comprises a second integrated circuit interconnection interface, wherein the first integrated circuit interconnection interface is connected to the second integrated circuit interconnection interface, and the signal conversion chip is configured to send signals of a target charging protocol to the second power supply chip.

[0080] The first integrated circuit interconnection interface can be an interface for sending peripheral device information detected by the signal conversion chip to the second power supply chip. The second integrated circuit interconnection interface can be an interface for receiving instructions and information from the signal conversion chip.

[0081] In an optional embodiment, the signal conversion chip can quickly identify the charging requirements of the peripheral device through the configuration channel pin, including determining the target charging protocol, such as the version of the PD protocol and the maximum power requirement. Once the identification is completed, the signal conversion chip will send this information to the second power supply chip through the first integrated circuit interconnection interface. After receiving the information, the second power supply chip communicates with the signal conversion chip through the second integrated circuit interconnection interface, adjusts its working mode to match the target protocol, and ensures that the peripheral device can be charged in a more efficient way. This intelligent identification and instant adjustment capability not only improves the charging efficiency, but also enhances the compatibility of the system to the peripheral device.

[0082] In the above embodiment, the connection between the signal conversion chip and the second power supply chip through the first integrated circuit interconnection interface not only improves the user's charging experience in the vehicle environment, improves the intelligent level of power management, but also enhances the compatibility, maintenance convenience and safety of the device interface.

[0083] In order to facilitate understanding, Figure 2 is a system architecture diagram of an optional device interface provided by an embodiment of the present application, as shown in Figure 2As shown, A1 represents a U disk / mobile phone / game console / computer and other external devices, A2 represents a USB Type-C interface, D1 represents diode 1, D2 represents diode 2, C1 represents a BC1.2 charging protocol chip, C2 represents a Buck-boost power supply chip, C3 represents a DP to CSI chip, and A3 represents a cockpit SOC chip. Among them, the cockpit SOC chip serves as the control center of the entire system, is responsible for processing all data signals from external devices, and controls the power distribution and function switching of the entire system. It controls the working state of the BC1.2 charging protocol chip and the Buck-BOOST power supply chip through the EN1 and EN2 signal lines respectively, realizes intelligent identification of different external devices and automatic selection of charging mode. The USB Type-C interface is located at the front end of the system and is the physical connection point of the external device and the vehicle-mounted system, supports positive and negative insertion functions, and improves the convenience of user use. It is connected with each circuit module inside the system through Vbus, DP, CC and other pins to realize power supply and signal transmission. The BC1.2 charging protocol chip is connected with the EN1 signal line of the cockpit SOC chip, and provides charging power for the external device through the Vbus pin of the USB Type C interface connector. It is responsible for the negotiation of the charging protocol to ensure that the device charges according to the BC1.2 standard. The Buck-boost power supply chip is connected with the EN2 signal line of the cockpit SOC chip, and is used to provide high-power charging service for the external device in the case of needing PD charging protocol. It adjusts its output voltage and current through the Vbus pin of the USB Type C interface connector according to the instruction of the central control chip to meet the charging needs of different devices. The DP to CSI module circuit is mainly responsible for video signal format conversion, converts the video signal sent by the external device through the DP interface into a CSI format signal that can be processed by the vehicle-mounted system, and converts the audio signal into an I2S format, ensuring that the video and audio signals of the game console and other devices can be played smoothly in the vehicle-mounted entertainment system. It is connected with the DP pin of the USB Type C interface connector and the cockpit SOC chip to realize signal input, conversion and output. Diode 1 is connected to the power output end of the BC1.2 charging protocol chip, diode 2 is connected to the power output end of the Buck-BOOST power supply chip, and the main function of diode 1 and diode 2 is to prevent reverse flow of power supply, protect the system and external devices from voltage inconsistency, reduce current crosstalk, and ensure that the BC1.2 charging protocol chip and the Buck-BOOST power supply chip can work independently without affecting each other.

[0084] The embodiment of the present application provides a vehicle-mounted device, which comprises the device interface circuit in the embodiments of the present application.

[0085] The embodiment of the present application provides a vehicle, which comprises the vehicle-mounted device in the embodiments of the present application.

[0086] In the present application, plural means two or more than two.

[0087] In the present application, unless otherwise explicitly defined, the terms "mounting", "connected", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be a physical structure connection, can also be an electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0088] The terms "first", "second", "third", "fourth" and the like (if any) in the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0089] The term "and / or" in the present application is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0090] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device interface circuit, characterized by The device interface circuit comprises: an external device interface connected with an external device; a first power supply chip connected with the external device interface through a first charging protection device; a second power supply chip connected with the external device interface through a second charging protection device, wherein the second power supply chip supports a charging protocol different from that supported by the first power supply chip; a central control chip connected with the first power supply chip and the second power supply chip respectively and configured to control the running state of the first power supply chip and the second power supply chip.

2. The device interface circuit of claim 1, wherein, The first power supply chip comprises a first power supply output end, a first chip enable interface, a first signal transmission end and a second signal transmission end, wherein the first power supply output end is connected with a first end of the external device interface through the first charging protection device, the first chip enable interface is connected with a first end of the central control chip, the first signal transmission end is connected with a second end of the external device interface, and the second signal transmission end is connected with a second end of the central control chip.

3. The device interface circuit of claim 2, wherein, The first charging protection device comprises a first diode, wherein a cathode of the first diode is connected with the first end of the external device interface, and an anode of the first diode is connected with the first power supply output end.

4. The device interface circuit of claim 1, wherein, The second power supply chip comprises a second power supply output end and a second chip enable end, wherein the second power supply output end is connected with the first end of the external device interface through the second charging protection device, and the second chip enable end is connected with a third end of the central control chip.

5. The device interface circuit of claim 4, wherein, The second charging protection device further comprises a second diode, wherein a cathode of the second diode is connected with the first end of the external device interface, and an anode of the second diode is connected with the second power supply output end.

6. The device interface circuit of claim 1, wherein, The device interface circuit further comprises: a signal conversion chip connected with the external device interface, the second power supply chip and the central control chip respectively and configured to determine a target charging protocol corresponding to the external device.

7. The device interface circuit of claim 6, wherein, The signal conversion chip comprises a configuration channel pin, a digital display interface, a video serial interface and an audio serial interface, wherein the configuration channel pin is connected with a third end of the external device interface, the digital display interface is connected with a fourth end of the external device interface, the video serial interface is connected with a third end of the central control chip, and the audio serial interface is connected with a fourth end of the central control chip.

8. The device interface circuit of claim 6, wherein, The signal conversion chip further comprises a first integrated circuit interconnection interface, and the second power supply chip further comprises a second integrated circuit interconnection interface, wherein the first integrated circuit interconnection interface is connected with the second integrated circuit interconnection interface, and the signal conversion chip is configured to send a signal of the target charging protocol to the second power supply chip.

9. An in-vehicle device characterized by comprising: The device interface circuit according to any one of claims 1-8.

10. A vehicle characterized by comprising: The vehicle-mounted device according to claim 9.

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