Charging device with mouse function

Abstract

The utility model belongs to the technical field of chargers, and particularly relates to a charging device with a mouse function, which comprises a switching power supply circuit; the protocol control circuit comprises a protocol control chip, a second switching tube and an interface circuit, the drain electrode of the second switching tube is connected with the voltage input end of the protocol control chip and the switching power supply circuit, and the source electrode of the second switching tube is connected with the voltage output end of the protocol control chip and the interface circuit; the grid electrode of the second switch tube is connected with the control end of the protocol control chip; the mouse circuit is respectively connected with the protocol control chip and the interface circuit; according to the charging device, full-automatic switching between a charging mode and a mouse mode is achieved by detecting the voltage difference between the voltage input end and the voltage output end through the protocol control chip, user operation is not needed in the switching process, the timeliness and accuracy of function switching are ensured, and the fluency of user experience is remarkably improved.

Description

Charging device with mouse function Technical Field

[0001] This application relates to the field of charger technology, and in particular to a charging device with mouse functionality. Background Technology

[0002] With the widespread adoption of mobile office devices, laptops, tablets, and foldable and tri-foldable smartphones have become standard tools in business travel scenarios. When using these devices, chargers and mice are two indispensable accessories: chargers extend the device's battery life, while mice provide precise operation and interaction. However, in current technology, chargers and mice are usually separate devices that users must carry separately, increasing luggage burden and item management costs, especially in business travel scenarios.

[0003] Although multi-functional charging devices exist on the market, their additional functions are mostly limited to expansion interfaces or energy storage modules, without integrating input devices. Simply combining mouse functions with a charging module could result in a bloated structure, cumbersome function switching, and even affect device stability due to electrical interference.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, this application provides a charging device with mouse function.

[0006] This application provides a charging device with mouse functionality, the device comprising:

[0007] Switching power supply circuit;

[0008] The protocol control circuit includes a protocol control chip, a second switching transistor, and an interface circuit. The drain of the second switching transistor is connected to the voltage input terminal of the protocol control chip and the switching power supply circuit, respectively. The source of the second switching transistor is connected to the voltage output terminal of the protocol control chip and the interface circuit, respectively. The gate of the second switching transistor is connected to the control terminal of the protocol control chip.

[0009] The mouse circuit is connected to the protocol control chip and the interface circuit respectively.

[0010] When the voltage at the input terminal of the protocol control chip is greater than the voltage at the output terminal of the protocol control chip, the charging device is in charging mode, the protocol control chip drives the mouse circuit to shut down, and the protocol control chip drives the switching power supply circuit to adjust the output voltage.

[0011] When the voltage at the input terminal of the protocol control chip is less than the voltage at the output terminal of the protocol control chip, the charging device is in mouse mode, and the protocol control chip drives the mouse circuit to work.

[0012] This charging device uses a protocol control chip to detect the voltage difference between the voltage input and output terminals, enabling fully automatic switching between charging and mouse modes. The switching process requires no user intervention, ensuring the timeliness and accuracy of function switching and significantly improving the smoothness of the user experience.

[0013] In some possible implementations, the second switch is an NMOS transistor.

[0014] In some possible implementations, the protocol control circuit includes a first optocoupler connected to the protocol control chip; the switching power supply circuit includes a second optocoupler communicatively connected to the first optocoupler.

[0015] In some possible implementations, the switching power supply circuit includes a power control chip, a first switching transistor, and a power conversion circuit. The gate of the first switching transistor is connected to the control terminal of the power control chip, the drain of the first switching transistor is connected to the power conversion circuit, the power conversion circuit is connected to the protocol control chip, the drain of the second switching transistor, and the interface circuit, respectively, and the second optocoupler is connected to the power control chip.

[0016] In some possible implementations, the second switch is an NMOS transistor.

[0017] In some possible implementations, the mouse circuitry includes an optical mouse control chip that incorporates a CMOS image sensor.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 is a circuit diagram of a charging device with mouse function provided in an embodiment of this application; Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] As shown in Figure 1, one embodiment provides a charging device with mouse functionality. The device includes a switching power supply circuit, a protocol control circuit, and a mouse circuit.

[0023] The protocol control circuit includes a protocol control chip U2, a second switching transistor Q2, and an interface circuit USB1. The drain of the second switching transistor Q2 is connected to the voltage input terminal Vin of the protocol control chip U2 and the switching power supply circuit, respectively. The source of the second switching transistor Q2 is connected to the voltage output terminal Vout of the protocol control chip U2 and the interface circuit USB1, respectively. The gate of the second switching transistor Q2 is connected to the control terminal Gate of the protocol control chip U2. The mouse circuit is connected to the protocol control chip U2 and the interface circuit USB1.

[0024] When the voltage at the input terminal Vin of the protocol control chip U2 is greater than the voltage at the output terminal Vout of the protocol control chip U2, the charging device is in charging mode, the protocol control chip U2 drives the mouse circuit to shut down, and the protocol control chip U2 drives the switching power supply circuit to adjust the output voltage.

[0025] Specifically, when the protocol control chip U2 detects that the voltage at its input terminal Vin is greater than the voltage at its output terminal Vout, the control terminal Gate of the protocol control chip U2 outputs a high-level signal to drive the second switch Q2 to turn on. The protocol control chip U2 then shuts down the mouse circuit. Thus, the voltage output from the switching power supply circuit is transmitted to the terminal device via the second switch Q2 and the interface circuit USB1, achieving charging.

[0026] Understandably, in charging mode, the folded prongs of the charging device are inserted into the power strip, and the USB1 interface circuit of the charging device is connected to the terminal device. The voltage at the Vin input terminal of the protocol control chip U2 is output by the switching power supply circuit, and the voltage at the Vout output terminal of the protocol control chip U2 is input by the terminal device.

[0027] When the voltage at the input terminal Vin of the protocol control chip U2 is less than the voltage at the output terminal Vout of the protocol control chip U2, the charging device is in mouse mode, and the protocol control chip U2 drives the mouse circuit to work.

[0028] Specifically, when the protocol control chip U2 detects that the voltage at its input terminal Vin is less than the voltage at its output terminal Vout, the control terminal Gate of the protocol control chip U2 outputs a low-level signal to turn off the second switch Q2. The protocol control chip U2 then drives the mouse circuit to operate.

[0029] Understandably, in mouse mode, the charging device's folded prongs are not inserted into the power strip, the charging device's interface circuit USB1 is connected to the terminal device, and the charging device can be used as a mouse.

[0030] This charging device uses the protocol control chip U2 to detect the voltage difference between the voltage input and voltage output terminals, enabling fully automatic switching between charging mode and mouse mode. The switching process requires no user intervention, ensuring the timeliness and accuracy of function switching and significantly improving the smoothness of the user experience.

[0031] As shown in Figure 1, in some embodiments, the second switch Q2 is an NMOS transistor.

[0032] As shown in Figure 1, in some embodiments, the protocol control circuit includes a first optocoupler U4A connected to the protocol control chip U2; the switching power supply circuit includes a second optocoupler U4B communicatively connected to the first optocoupler U4A.

[0033] Thus, through the cooperation of the first optocoupler U4A and the second optocoupler U4B, the protocol control chip U2 can regulate the voltage of the switching power supply circuit.

[0034] As shown in Figure 1, in some embodiments, the switching power supply circuit includes a power control chip U1, a first switching transistor Q1, and a power conversion circuit T1. The gate of the first switching transistor Q1 is connected to the control terminal Gate of the power control chip U1, and the drain of the first switching transistor Q1 is connected to the power conversion circuit T1. The power conversion circuit T1 is connected to the protocol control chip U2, the drain of the second switching transistor Q2, and the interface circuit USB1, respectively. The second optocoupler U4B is connected to the power control chip U1.

[0035] Understandably, in charging mode, the terminal device communicates with the protocol control chip U2 via the interface circuit USB1, informing the protocol control chip U2 of the required fast charging voltage. Upon receiving the required fast charging voltage, the protocol control chip U2 adjusts the current flowing through the first optocoupler U4A. When the current in the first optocoupler U4A changes, the on-resistance of the second optocoupler U4B changes, causing a change in the current flowing through the second optocoupler U4B. This change in the current at the pin connected to the power control chip U1 and the second optocoupler U4B causes a change in the voltage of its internal pull-up resistor. The power control chip U1 determines the required fast charging voltage based on the magnitude of this voltage change, thereby adjusting the duty cycle and frequency of the drive signal output from its control terminal (Gate) to ultimately achieve the required fast charging voltage from the interface current.

[0036] As shown in Figure 1, in some embodiments, the second switch Q2 is an NMOS transistor.

[0037] As shown in Figure 1, in some embodiments, the mouse circuit includes an optical mouse control chip U3, which has a built-in CMOS image sensor.

[0038] In this way, the CMOS image sensor can determine whether the user is operating the mouse. If the user does not operate the mouse for a long time, the optical mouse control chip will enter a sleep state to reduce standby power consumption.

[0039] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0041] The above are merely preferred embodiments of this application and do not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.

Claims

1. A charging device with mouse functionality, characterized in that, The device includes: a switching power supply circuit; a protocol control circuit, the protocol control circuit including a protocol control chip, a second switching transistor, and an interface circuit, wherein the drain of the second switching transistor is connected to the voltage input terminal of the protocol control chip and the switching power supply circuit, the source of the second switching transistor is connected to the voltage output terminal of the protocol control chip and the interface circuit, and the gate of the second switching transistor is connected to the control terminal of the protocol control chip; and a mouse circuit, the mouse circuit being connected to the protocol control chip and the interface circuit. When the voltage at the voltage input terminal of the protocol control chip is greater than the voltage at the voltage output terminal of the protocol control chip, the charging device is in charging mode, the protocol control chip drives the mouse circuit to shut down, and the protocol control chip drives the switching power supply circuit to adjust the output voltage; when the voltage at the voltage input terminal of the protocol control chip is less than the voltage at the voltage output terminal of the protocol control chip, the charging device is in mouse mode, and the protocol control chip drives the mouse circuit to operate.

2. The charging device with mouse function according to claim 1, characterized in that, The second switch is an NMOS transistor.

3. The charging device with mouse function according to claim 1, characterized in that, The protocol control circuit includes a first optocoupler connected to the protocol control chip; the switching power supply circuit includes a second optocoupler communicatively connected to the first optocoupler.

4. The charging device with mouse function according to claim 3, characterized in that, The switching power supply circuit includes a power control chip, a first switching transistor, and a power conversion circuit. The gate of the first switching transistor is connected to the control terminal of the power control chip, and the drain of the first switching transistor is connected to the power conversion circuit. The power conversion circuit is connected to the protocol control chip, the drain of the second switching transistor, and the interface circuit. The second optocoupler is connected to the power control chip.

5. The charging device with mouse function according to claim 4, characterized in that, The second switch is an NMOS transistor.

6. The charging device with mouse function according to claim 1, characterized in that, The mouse circuit includes an optical mouse control chip, which has a built-in CMOS image sensor.

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