应用于显卡坞的充电控制电路及显卡坞

Abstract

本实用新型公开了一种应用于显卡坞的充电控制电路及显卡坞，该电路包括目标控制子电路和数据通道切换子电路，其中，目标控制子电路用于当接收到目标设备通过USB4接口传输的设备充电信号时，将充电电压通过USB4接口传输至目标设备，以对目标设备进行充电；当接收到目标设备通过USB4接口传输的初始数据信号时，对初始数据信号进行转换，以将第一通讯信号传输至数据通道切换子电路；数据通道切换子电路，用于根据第一通讯信号，执行与USB4接口相匹配的第一通道切换操作，以通过第一通讯信号实现目标设备与显卡之间的通讯，这样，显卡坞可以在实现数据高效传输的同时，灵活地为目标设备进行充电，减少显卡坞的拔插次数，从而有利于提升用户使用体验。

Claims

1. A charging control circuit applied to a graphics card dock, characterized in that, The charging control circuit includes a target control sub-circuit and a data channel switching sub-circuit, wherein: The protocol communication terminal of the target control subcircuit is electrically connected to the protocol communication terminal of the USB4 interface; the voltage transmission terminal of the target control subcircuit is electrically connected to the voltage receiving terminal of the USB4 interface; the signal receiving terminal of the target control subcircuit is electrically connected to the signal transmission terminal of the USB4 interface; the signal transmission terminal of the target control subcircuit is electrically connected to the first receiving terminal of the data channel switching subcircuit; the second receiving terminal of the data channel switching subcircuit is electrically connected to the signal transmission terminal of the Oculink interface; the signal transmission terminal of the data channel switching subcircuit is electrically connected to the signal receiving terminal of the graphics card slot; and the signal transmission terminal of the graphics card slot is electrically connected to the graphics card. The target control sub-circuit is configured to, when the target device is only electrically connected to the USB4 interface and when a device charging signal transmitted by the target device through the USB4 interface is received, generate a charging voltage based on the device charging signal, and transmit the charging voltage to the target device through the USB4 interface to charge the target device; when an initial data signal transmitted by the target device through the USB4 interface is received, convert the initial data signal to obtain a first communication signal, and transmit the first communication signal to the data channel switching sub-circuit. The data channel switching sub-circuit is used to perform a first channel switching operation matching the USB4 interface according to the first communication signal, so as to transmit the first communication signal to the graphics card in the graphics card slot, so that the target device can communicate with the graphics card.

2. The charging control circuit for a graphics card dock according to claim 1, characterized in that, The target control sub-circuit is further configured to generate the charging voltage based on the device charging signal when the target device is electrically connected to the USB4 interface and the Oculink interface, and when the target device receives the device charging signal transmitted through the USB4 interface, and transmit the charging voltage to the target device through the USB4 interface to charge the target device. The data channel switching sub-circuit is further configured to perform a second channel switching operation matching the Oculink interface when the target device receives a second communication signal transmitted through the Oculink interface, so as to transmit the second communication signal to the graphics card in the graphics card slot, so that the target device can communicate with the graphics card.

3. The charging control circuit for a graphics card dock according to claim 2, characterized in that, The target control sub-circuit includes a communication module, a voltage transmission module, and a signal conversion module, wherein: The first communication terminal of the communication module is electrically connected to the protocol communication terminal of the USB4 interface; the voltage transmission control terminal of the communication module is electrically connected to the voltage transmission controlled terminal of the voltage transmission module; the voltage transmission terminal of the voltage transmission module is electrically connected to the voltage receiving terminal of the USB4 interface; the signal receiving terminal of the signal conversion module is electrically connected to the signal transmission terminal of the USB4 interface; the second communication terminal of the communication module is electrically connected to the conversion communication terminal of the signal conversion module; and the signal transmission terminal of the signal conversion module is electrically connected to the first receiving terminal of the data channel switching sub-circuit. The communication module is used to communicate with the target device via the USB4 interface based on the device charging signal; after completing the protocol communication, it controls the voltage transmission module to generate the charging voltage according to the device charging signal, and transmits the charging voltage to the target device via the USB4 interface to charge the target device. The signal conversion module is used to communicate with the communication module to obtain signal conversion parameters when it receives the initial data signal transmitted by the target device through the USB4 interface, and to convert the initial data signal according to the signal conversion parameters to obtain a first communication signal, so as to transmit the first communication signal to the data channel switching sub-circuit.

4. The charging control circuit for a graphics card dock according to claim 3, characterized in that, The voltage transmission module includes a voltage conversion component and a switching component, wherein: The voltage conversion communication terminal of the voltage conversion component is electrically connected to the third communication terminal of the communication module, the voltage transmission terminal of the voltage conversion component is electrically connected to the voltage receiving terminal of the switch component, the controlled terminal of the switch component is electrically connected to the control terminal of the communication module, and the voltage transmission terminal of the switch component is used to electrically connect to the voltage receiving terminal of the USB4 interface. The communication module is specifically used to, after completing the protocol communication, communicate with the voltage conversion component based on the device charging signal to obtain voltage conversion parameters that match the device charging signal, so that the voltage conversion component converts the received initial voltage according to the voltage conversion parameters to obtain the converted voltage; at the same time, it controls the switch component to be in the conducting state so that the converted voltage is transmitted to the target device through the switch component and the USB4 interface to charge the target device.

5. The charging control circuit applied to the graphic card dock according to claim 3 or 4, characterized in that, The charging control circuit further includes a signal amplification sub-circuit, wherein: The signal receiving end of the signal amplification sub-circuit is electrically connected to the signal transmission end of the data channel switching sub-circuit, and the signal transmission end of the signal amplification sub-circuit is used to electrically connect to the signal receiving end of the graphics card slot. After the data channel switching subcircuit completes the first channel switching operation, the signal amplification subcircuit is specifically used to: receive the first communication signal and amplify the first communication signal to obtain a first amplified signal; transmit the first amplified signal to the graphics card in the graphics card slot so that the target device can communicate with the graphics card; After the data channel switching subcircuit completes the second channel switching operation, the signal amplification subcircuit is specifically used to: receive the second communication signal and amplify the second communication signal to obtain a second amplified signal; and transmit the second amplified signal to the graphics card in the graphics card slot so that the target device can communicate with the graphics card.

6. The charging control circuit for a graphics card dock according to claim 5, characterized in that, The data channel switching sub-circuit includes a data channel switching module and a signal processing module, wherein: The first sub-receiving end of the data channel switching module and the first sub-receiving end of the signal processing module are both electrically connected to the signal transmission end of the signal conversion module. The second sub-receiving end of the data channel switching module and the second sub-receiving end of the signal processing module are both electrically connected to the signal transmission end of the Oculink interface. The routing control end of the signal processing module is electrically connected to the routing controlled end of the data channel switching module. The signal transmission end of the data channel switching module is electrically connected to the signal receiving end of the signal amplification sub-circuit.

7. The charging control circuit for a graphics card dock according to claim 6, characterized in that, The data channel switching sub-circuit also includes a filtering module, wherein: The signal receiving end of the filtering module is electrically connected to the signal transmitting end of the data channel switching module, and the signal transmitting end of the filtering module is electrically connected to the signal receiving end of the signal amplification sub-circuit. The filtering module may include a single filtering capacitor or multiple filtering capacitors connected in parallel.

8. The charging control circuit for a graphics card dock according to claim 4, characterized in that, The communication module includes a communication component and a rate limiting component, wherein: The first communication terminal of the communication component is used to electrically connect to the protocol communication terminal of the USB4 interface, the third communication terminal of the communication component is electrically connected to the voltage conversion communication terminal of the voltage conversion component, the control terminal of the communication component is electrically connected to the controlled terminal of the switch component, the second communication terminal of the communication component is electrically connected to the first terminal of the current limiting component, and the second terminal of the current limiting component is electrically connected to the conversion communication terminal of the signal conversion module. The current limiting component may include a single current limiting resistor, or multiple current limiting resistors connected in series, or multiple current limiting resistors connected in parallel.

9. The charging control circuit for a graphics card dock according to claim 8, characterized in that, The communication module also includes a filtering component, wherein: The first end of the filter component is electrically connected to the first communication end of the communication component, and the second end of the filter component is used for grounding; The filtering component includes a single filtering capacitor or multiple filtering capacitors connected in parallel.

10. A video card dock, comprising: The graphics card dock includes a charging control circuit as described in any one of claims 1-9.

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