Power supply switching device and power supply system

Abstract

The utility model provides a power supply switching device and a power supply system. The power supply switching device comprises a power supply interface, a load equipment interface, a first output unit, a detection unit and a control unit, the power interface is used for being connected with target equipment for providing power; the load equipment interface is used for being connected with to-be-powered equipment; the first output unit is connected between the power supply interface and the load equipment interface and is used for adjusting a power supply signal received from the power supply interface; the detection unit is connected between the power interface and the control unit and used for detecting target parameters of the obtained power signals and sending the target parameters to the control unit; the control unit is connected with the first output unit and used for receiving the target parameter and sending an adjusting signal to the first output unit; and after the first output unit receives the adjustment signal and the power supply signal, the first output unit outputs an output power supply signal to the load equipment interface so as to supply power to equipment to be powered connected with the load equipment interface.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic equipment, and in particular to a power adapter and a power supply system. Background Art

[0002] Currently, electronic devices, including but not limited to head-mounted display devices, require power from power adapters. Power adapters, connected between a power supply device and a device to be powered, can receive a power signal from the power supply device and transmit it to the device to be powered. Due to the poor performance of power adapters in related technologies, there is a need for a power adapter with better performance to meet the power supply needs of electronic devices, including but not limited to head-mounted display devices. Utility Model Content

[0003] According to a first aspect of an embodiment of the present application, a power adapter is provided, comprising: a power interface, a load device interface, a first output unit, a detection unit and a control unit; the power interface is used to connect to a target device that provides power; the load device interface is used to connect to a device to be powered; the first output unit is connected between the power interface and the load device interface, and is used to adjust the power signal received from the power interface; the detection unit is connected between the power interface and the control unit, and is used to detect target parameters of the obtained power signal and send the target parameters to the control unit; the control unit is connected to the first output unit, and is used to receive the target parameters and send an adjustment signal to the first output unit; after receiving the adjustment signal and the power signal, the first output unit outputs an output power signal to the load device interface to power the device to be powered connected to the load device interface.

[0004] According to the second aspect of an embodiment of the present application, a power supply system is provided, comprising: at least one target device, a device to be powered, and a power adapter as described in any one of the first aspects, wherein the target device is connected to the power interface of the power adapter, and the device to be powered is connected to the load device interface of the power adapter. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0006] Figure 1 Schematic diagrams showing some exemplary power transfer devices in this application.

[0007] Figure 2Schematic diagrams showing some other exemplary power adapters in this application.

[0008] Figure 3 Schematic diagrams showing some further exemplary power transfer devices in the present application.

[0009] Figure 4 Shown are schematic diagrams of the circuit structures of some exemplary power adapters in this application.

[0010] Figure 5 Schematic diagrams showing some exemplary power supply systems in this application.

[0011] Description of reference numerals:

[0012] 100, power adapter; 10, control unit; 11, first interface; 12, load device interface; 13, second interface; 21, first output unit; 211, load switch module; 212, adjustable resistance module; 22, second output unit;

[0013] 31. First detection unit; 311. First current detection module; 312. First voltage detection module;

[0014] 32. Second detection unit; 321. Second current detection module; 322. Second voltage detection module;

[0015] 40. Switching unit; 41. First switching device; 42. Second switching device;

[0016] 50. Buck unit; 51. First buck module; 52. Second buck module;

[0017] Vout, electrical connection point; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R8, eighth resistor;

[0018] AMP1, first operational amplifier; AMP2, second operational amplifier; ADC, analog-to-digital conversion module. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art should fall within the scope of protection of the embodiments of the present application. It should be understood that the various steps described in the method implementation mode of the present disclosure can be performed in different orders and / or in parallel. In addition, the method implementation mode may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0020] At present, electronic devices, including but not limited to head-mounted display devices, need to obtain power through power adapters. The power adapter is connected between the power supply device and the device to be powered, and can obtain the power signal from the power supply device and then transmit it to the device to be powered. The performance of the power adapter in the related art is not good. For example, some power adapters transmit the power signal of the power supply device through the power supply device, and the power signal output to the device to be powered is inappropriate (for example, the parameters are too high or too low, etc.), which can easily affect the normal operation of the device to be powered.

[0021] In view of this, the present application provides a power adapter with better performance to meet the power supply needs of electronic devices including but not limited to head-mounted display devices.

[0022] Figure 1 Schematic diagrams of some exemplary power adapters in this application are shown. In some optional embodiments, refer to Figure 1As shown, a power adapter device 100 in the present application may include: a power interface, a load device interface 12, a first output unit 21, a detection unit and a control unit 10. Here, the power interface can be used to connect to a target device that provides power. The load device interface 12 can be used to connect to a device to be powered. The first output unit 21 can be connected between the power interface and the load device interface 12, and is used to adjust the power signal received from the power interface. The detection unit can be connected between the power interface and the control unit 10, and is used to detect the target parameters of the obtained power signal and send the target parameters to the control unit 10. The control unit 10 is connected to the first output unit 21, and can be used to receive the target parameters and send an adjustment signal to the first output unit 21; after receiving the adjustment signal and the power signal, the first output unit 21 outputs an output power signal to the load device interface 12 to power the device to be powered connected to the load device interface 12. Optionally, the adjustment signal can be a control signal issued by the control unit 10. The control unit 10 can generate an adjustment signal based on the target parameter and send the adjustment signal to the first output unit 21, thereby controlling the first output unit 21 to adjust the power signal to output the adjusted output power signal to power the device to be powered connected to the load device interface 12.

[0023] In some optional embodiments, referring to Figure 1 As shown, a power adapter device 100 provided in an embodiment of the present application may include: a power interface, a load device interface 12, a first output unit 21, a detection unit and a control unit 10. Here, the power interface can be used to connect to a target device that provides power. The load device interface 12 can be used to connect to a device to be powered. The first output unit 21 can be connected between the power interface and the load device interface 12, and is used to adjust the power signal received from the power interface. The detection unit can be connected between the power interface and the control unit 10, and is used to detect the target parameters of the obtained power signal and send the target parameters to the control unit 10. The control unit 10, connected to the first output unit 21, can be used to control the first output unit 21 to adjust the power signal based on the target parameters, and output the adjusted power signal to the load device interface 12 to power the device to be powered connected to the load device interface 12.

[0024] In the power adapter device 100 of this embodiment, the power interface can be connected to the target device providing power, the load device interface 12 can be connected to the device to be powered, the first output unit 21 can adjust the power signal received from the power interface, the detection unit can detect the target parameters of the power signal obtained, and send the target parameters to the control unit 10. The control unit 10 can control the first output unit 21 to adjust the power signal based on the target parameters and output the adjusted power signal to the load device interface 12 to power the device to be powered connected to the load device interface 12. Therefore, on the one hand, the power adapter device 100 can effectively realize the power transfer function to realize the power supply from the target device to the device to be powered; on the other hand, the power signal output by the first output unit 21 of the power adapter device 100 to the load device interface 12 can be dynamically adjusted according to the target parameters of the power detected by the detection unit. This can better adapt to the power supply needs of the device to be powered in different scenarios and different power supply devices, and can also avoid the disadvantage that the normal operation of the device to be powered is affected by inappropriate power output (for example, parameters that are too high or too low) from the target device providing power. Therefore, the power adapter 100 of the embodiment of the present application effectively improves performance, which is conducive to better adapting to the power supply requirements of electronic devices (i.e., devices to be powered) including but not limited to head-mounted display devices.

[0025] The power adapter 100 is further described below with reference to the accompanying drawings of the embodiment of the present application.

[0026] In an embodiment of the present application, the power interface may be an interface on the power adapter 100 for connecting to a target device that provides power. The power interface may be any type of interface. For example, in some examples, the power interface may be a USB Type-C interface, or it may be another type of interface. In some optional embodiments, the target device may be any device that can output power, and some optional types may be electronic devices with power output capabilities, for example, including but not limited to mobile phones, tablets, computers, car computers, servers, game consoles, power banks and other electronic devices. Another optional type may be a charger, which can be connected to the mains and output the required power signal. Chargers may include, for example, but not limited to PD chargers (PD stands for Power Delivery, and PD chargers are also chargers that support the PD charging protocol) and QC chargers (QC stands for Quick Charge, and QC chargers are also chargers that support the QC charging protocol). It should be understood that the target device can be selected as needed and there is no specific limitation here. By connecting the target device to the power interface of the power adapter 100, it is convenient for the power adapter 100 to transfer power to the device to be powered that is connected to the load device interface 12.

[0027] In some optional embodiments, the power interface can be a unidirectional input power interface (such as the second interface 13 described below), which is generally used to unidirectionally receive a power signal input from a target device. In other optional embodiments, the power signal can also be a bidirectional input and output power interface (such as the first interface 11 described below), which can receive a power signal input from a target device and can also output a power signal to the target device. The first interface 11 and the second interface 13 are examples of power interfaces, which are not limitations of the power interfaces. They will be described in detail below and will not be repeated here.

[0028] In some optional embodiments, the load device interface 12 can be an interface on the power adapter 100 for connecting to the load device, where the load device is also the device to be powered. The load device interface 12 can be any type of interface. For example, in some examples, the load device interface 12 can be a USB Type-C interface, or it can also be another type of interface. In the embodiment of the present application, the device to be powered can be any electronic device. For example, including but not limited to: mobile phones, tablet computers, computers, car computers, servers and other electronic devices. In some optional embodiments, the device to be powered can be a head-mounted display device. Head-mounted display devices can include but are not limited to AR (Augmented Reality) glasses, VR (Virtual Reality) glasses, etc. By connecting the device to be powered to the load device interface 12, it can be convenient for the device to be powered to obtain power from the target device through the power adapter 100 to maintain the operation of the device to be powered. For the convenience of explaining the embodiments of the present application, the device to be powered may also be referred to as LOAD in the following text.

[0029] In some optional embodiments, the control unit 10 may include any controller with output processing and control capabilities. For example, it may include but is not limited to a CPU (Central Processing Unit), an MCU (Microcontroller Unit), a GPU (Graphic Processing Unit), an FPGA (Field Programmable Gate Array), etc. For ease of explanation, this application may illustrate the control unit 10 as an MCU.

[0030] In some optional embodiments, the detection unit may be configured to detect a target parameter of a power signal obtained from the power interface, so that the control unit 10 may control the first output unit 21 to adjust the power signal based on the target parameter.

[0031] Optionally, the target parameter may include a current value. Correspondingly, the detection unit may include a circuit structure capable of detecting the current value, which is not specifically limited in the implementation of this application. The above-mentioned detection unit can be implemented by a variety of circuit structures. Some optional circuit structures will be given below for illustration, which will not be described here. It is understandable that the target parameter detected by the above-mentioned detection unit can be set according to actual needs. For example, the target parameter may include a voltage value, and accordingly, the detection unit checks the voltage value, etc. There is no unique limitation here.

[0032] It should be understood that the detection unit in this application obtains the current value of the power signal through detection, so that the first output unit 21 can dynamically adjust the power signal input therein according to the current value detected by the detection unit, so as to better adapt to the power supply requirements of the device to be powered in different scenarios, thereby improving the performance of the power adapter 100.

[0033] In some optional embodiments, the first output unit 21 can be controlled by the control unit 10 and can adjust the power signal transmitted from the power interface. The first output unit 21 can be composed of any suitable circuit structure, which is not specifically limited in this application.

[0034] In some example applications, if the target parameter (e.g., current value) detected by the detection unit is too high, the control unit 10 can control the first output unit 21 to adjust the current value of the obtained power signal to a lower value before outputting it to the load device interface 12, thereby achieving output current limiting. This can prevent the current value of the power signal output to the load device interface 12 from being too high, thereby preventing the device to be powered connected to the load device interface 12 from malfunctioning due to the current value being too high. In other example applications, if the target parameter (e.g., current value) detected by the detection unit is too low, the control unit 10 can control the first output unit 21 to adjust the current value of the obtained power signal to a higher value before outputting it to the load device interface 12. This can prevent the current value of the power signal output to the load device interface 12 from being too low, thereby preventing the device to be powered connected to the load device interface 12 from malfunctioning due to the current value being too low. It should be understood that these are only two simple examples, and any appropriate method can be used to control the first output unit 21 to adjust the power signal.

[0035] In some optional embodiments, reference Figure 4In the circuit structure shown, the first output unit 21 may include a load switch module 211 and an adjustable resistor module 212 connected to each other. The load switch module 211 may be connected between the first interface 11 and the load device interface 12, and the adjustable resistor module 212 is connected to the control unit 10. The control unit 10 may control the resistance value of the adjustable resistor module 212 based on the target parameter, so that the load switch module 211 outputs an adjusted power signal to the load device interface 12 based on the resistance value of the adjustable resistor module 212.

[0036] Based on this, through the above-mentioned first output unit 21 including the load switch module 211 and the adjustable resistance module 212, the power signal can be effectively adjusted and output to the load device interface 12, so that the power signal output by the first output unit 21 can be effectively realized. It can be dynamically adjusted in real time (including increasing or decreasing the target parameter) according to the target parameter detected by the detection unit, so as to better adapt to the power supply requirements of the device to be powered in different scenarios and scenario transitions, and can also avoid the disadvantage of affecting the normal operation of the device to be powered due to inappropriate output power of the target device providing power (for example, parameters are too high or too low, etc.).

[0037] For example, the control unit 10 can increase the resistance value of the adjustable resistor module 212 so that the load switch module adjusts the current value of the obtained power signal to a lower value based on the increased resistance value and outputs the signal to the load device interface 12. Furthermore, the control unit 10 can decrease the resistance value of the adjustable resistor module 212 so that the load switch module adjusts the current value of the obtained power signal to a higher value based on the decreased resistance value and outputs the signal to the load device interface 12.

[0038] Optionally, refer to Figure 4As shown, the load switch module 211 can be connected to the GPIO (General-Purpose Input / Output) port of the control unit 10, and the adjustable resistor module 212 can be connected to the control unit 10 via an I2C (Inter-Integrated Circuit) bus. The I2C bus may include an SCL line (Serial Clock Line) and an SDA line (Serial Data Line). Of course, this is only an example connection method and does not limit the embodiments of the present application. In some optional embodiments, the present application provides a power adapter 100, comprising: a power interface, a load device interface 12, a first output unit 21, a detection unit and a control unit 10; wherein the power interface is used to connect to a target device that provides power; the load device interface 12 is used to connect to a device to be powered; the first output unit 21 is connected between the power interface and the load device interface 12, and is used to adjust the power signal received from the power interface; the detection unit is connected to the power interface, and is used to detect target parameters of the power signal received from the power interface, and send the target parameters to the control unit 10; the control unit 10 is connected to the first output unit 21 and the detection unit, and the control unit is used to generate a control signal based on the target parameters received from the detection unit, wherein the control signal is used to control the first output unit 21 to adjust the power signal, so that the first output unit outputs the adjusted power signal to the load device interface 12, thereby powering the device to be powered connected to the load device interface 12.

[0039] Based on this, on the one hand, the power adapter 100 can effectively realize the function of power transfer to realize the power supply of the target device to the device to be powered; on the other hand, the power signal output by the first output unit 21 of the power adapter 100 can be dynamically adjusted in real time according to the target parameters of the power detected by the detection unit, so that it can better adapt to the power supply requirements of the device to be powered under different scenarios and scene changes and different power supply devices, and can also avoid the disadvantage of affecting the normal operation of the device to be powered due to inappropriate power output of the target device providing power (for example, parameters are too high or too low, etc.). Therefore, the power adapter 100 of the embodiment of the present application effectively improves the performance, which is conducive to better adapting to the power supply requirements of electronic devices (i.e., devices to be powered) including but not limited to head-mounted display devices.

[0040] In some optional embodiments, the target device may include a first target device, referring to Figure 2 、 Figure 3 or Figure 4As shown. The power interface may include a first interface 11, which may be used to connect to a first target device. The first output unit 21 may be connected between the first interface 11 and the load device interface 12, so that the first output unit 21 can adjust the electrical signal input to the device to be powered via the load device interface 12. Accordingly, the detection unit may include a first detection unit 31, which may be used to detect a first target parameter of the first power signal input from the first interface 11 and send the first target parameter to the control unit 10.

[0041] In some optional embodiments, the control unit 10 may receive a first target parameter and send a first adjustment signal to the first output unit 21. After receiving the first adjustment signal and the first power signal, the first output unit 21 may output an output power signal to the load device interface 12 to power the device to be powered connected to the load device interface 12. Optionally, the first adjustment signal may be a control signal. Optionally, the control unit 10 may generate a first adjustment signal based on the first target parameter and send the first adjustment signal to the first output unit 21, thereby controlling the first output unit 21 to adjust the first power signal from the first target device to output the adjusted output power signal to power the device to be powered connected to the load device interface 12.

[0042] In some optional embodiments, the control unit 10 can control the first output unit 21 to adjust the first power signal originating from the first target device to obtain an output power signal based on the first target parameter, and output the output power signal to the load device interface 12 to power the device to be powered connected to the load device interface 12.

[0043] It is understandable that the above-mentioned target parameters can be detected during the use of the power adapter 100, and the power signal received by the load device can be adjusted in real time through the first output unit 21 based on the target parameters to meet the needs of dynamic changes in the power supply of the load device. Here, unlike the solution of directly supplying power to the load device on demand after determining the calibrated power of the load device, this solution can achieve dynamic changes in the power supply of the load device in different scenarios or when the scenario changes to meet its needs. In some optional solutions, the power adapter 100 can achieve dynamic power supply by controlling the first output unit 21 and the detection unit, etc., without the need to control the electrical connection of the electronic devices of each interface through switches, etc. to achieve real-time control of the electronic devices of each interface, which is more flexible.

[0044] Based on this, through the above-mentioned optional embodiments, on the one hand, the power adapter device 100 can effectively realize the power adapter function so as to power the device to be powered; on the other hand, the first output unit 21 of the power adapter device 100 can dynamically adjust the output power signal output to the load device interface 12 according to the first target parameter of the first power signal detected by the first detection unit 31, so as to better adapt to the real-time power supply needs of the device to be powered under different scenarios and scenario changes, and can also avoid the disadvantage of affecting the normal operation of the device to be powered due to inappropriate output power of the first target device providing power (for example, parameters are too high or too low, etc.).

[0045] Optionally, the first target device in this application may be an electronic device with power output capability, including, but not limited to, a mobile phone, a tablet computer, a computer, a car computer, a server, a game console, a power bank, and other electronic devices. For the convenience of describing the embodiments of this application, the first target device may also be referred to as the host terminal or HOST in the following text.

[0046] The first power signal may be an electrical signal output by the first target device to the first interface 11. The first power signal may be a power signal with a voltage within a preset range, the specific range of which is not limited here, for example, 5V to 20V.

[0047] In an exemplary application scenario, the device to be powered may be a head-mounted display device, and the first target device may be the host end of the head-mounted display device. For example, the host end may provide multimedia data (including but not limited to at least one of video data, audio data, image data, etc.) for playback to the head-mounted display device, and output a first power signal through a power interface to provide the head-mounted display device with an output power signal adjusted by the first output unit 21, thereby powering the head-mounted display device, thereby enabling the head-mounted display device to work, and meeting the user's needs for entertainment through the head-mounted display device. It is understandable that in the embodiment, the power interface is also multiplexed as a multimedia data interface, so that the first target device can not only provide a power signal to the device to be powered through the multiplexed interface, but also provide a multimedia data signal to the device to be powered.

[0048] Alternatively, the first target parameter may include a current value determined based on the first power signal.

[0049] The first detection unit 31 in this application can be implemented using any suitable circuit structure. Figure 4In the circuit structure shown, the first detection unit 31 may include a first current detection module 311. The first current detection module 311 may include a first resistor R1 and a first operational amplifier AMP1. The first end of the first resistor R1 is connected to the first interface 11, the second end of the first resistor R1 is connected to the load device interface 12, the non-inverting end of the first operational amplifier AMP1 is connected to the first end of the first resistor R1, the inverting end of the first operational amplifier AMP1 is connected to the second end of the first resistor R1, and the output end of the first operational amplifier AMP1 is connected to the control unit 10.

[0050] It is understandable that the current detection circuit composed of the first resistor R1 and the first operational amplifier AMP1 can enable the first current detection module 311 to effectively detect the current value flowing through the first resistor R1, that is, to obtain the first target parameter.

[0051] Optionally, refer to Figure 4 In the circuit structure shown, the control unit 10 may include an analog-to-digital conversion module ADC. The output end of the first operational amplifier AMP1 may be connected to the analog-to-digital conversion module ADC, and the detected first analog data may be output to the analog-to-digital conversion module ADC. The analog-to-digital conversion module ADC performs analog-to-digital conversion on the first analog data and processes it into first digital data that can indicate the current value. The control unit 10 may process the first digital data as a current value (i.e., a first target parameter) so as to control the first output unit 21 to adjust the first power signal based on the first target parameter to obtain an output power signal.

[0052] Optionally, the first detection unit 31 can also detect a voltage value. Figure 4 In the circuit structure shown, the first detection unit 31 can also include a first voltage detection module 312, the first voltage detection module 312 includes a second resistor R2 and a third resistor R3, the first end of the second resistor R2 is connected to the second end of the first resistor R1, the first end of the third resistor R3 is connected to the second end of the second resistor R2, the second end of the third resistor R3 is grounded, and the control unit 10 is connected to the electrical connection line between the second end of the second resistor R2 and the first end of the third resistor R3.

[0053] It is understandable that the resistor divider circuit composed of the second resistor R2 and the third resistor R3 can be effectively used to detect voltage, and can enable the first voltage detection module 312 to effectively detect the voltage value at the second end of the first resistor R1.

[0054] Optionally, refer to Figure 4In the circuit structure shown, the control unit 10 can be connected to the electrical connection line between the second end of the second resistor R2 and the first end of the third resistor R3 through its analog-to-digital conversion module ADC, so as to obtain second analog data that can reflect the voltage value. The analog-to-digital conversion module ADC then performs analog-to-digital conversion on the second analog data and processes it into second digital data that can indicate the voltage value. The control unit 10 can process the second digital data as a voltage value.

[0055] Optionally, the first voltage detection module 312 can be used to detect whether the first target device is connected to the first interface 11. For example, when the first target device is connected to the first interface 11, the first power signal output by the first voltage detection module 312 will cause the second analog data provided to the control unit 10 by the first voltage detection module 312 to change, and thus the second digital data will also change. Therefore, the control unit 10 can determine in real time that the first target device is connected to the first interface 11 based on this change; conversely, if the first target device is not connected to the first interface 11, the above-mentioned change will not occur. Therefore, the control unit 10 can determine in real time that the first target device is not connected to the first interface 11.

[0056] In some optional embodiments, when the power interface is the first interface 11 for connecting to the first target device, the power adapter 100 is not limited to having only the first interface 11 and the load device interface 12. The power conversion device may also include other interfaces (such as the second interface 13 described below), but when the other interfaces are not connected to external devices, the first target device can power the device to be powered connected to the load device interface 12, and the internal circuit structure of the power adapter 100 can dynamically adjust the output power signal output from the load device interface 12 with reference to the usage scenario of the device to be powered.

[0057] In some optional embodiments, the target device may include a first target device and a second target device. Figure 2 、 Figure 3 、 Figure 4 As shown. The power interface may include a first interface 11 and a second interface 13. The first interface 11 may be used to connect to a first target device, the second interface 13 may be used to connect to a second target device, and the second interface 13 may be used to receive a second power signal. The first output unit 21 may be connected between the second interface 13 and the load device interface 12. The detection unit may include a second detection unit 32, which is used to detect a second target parameter of the second power signal transmitted by the second interface 13 and send the second target parameter to the control unit 10.

[0058] In some optional embodiments, the control unit 10 may receive a second target parameter and send a second adjustment signal to the first output unit 21. After receiving the second adjustment signal and the second power signal, the first output unit 21 outputs an output power signal to the load device interface 12 to power the device to be powered connected to the load device interface 12. Optionally, the second adjustment signal may be a control signal. Optionally, the control unit 10 may generate a second adjustment signal based on the second target parameter and send the second adjustment signal to the first output unit 21, thereby controlling the first output unit 21 to adjust the second power signal from the second target device to output the adjusted output power signal to power the device to be powered connected to the load device interface 12.

[0059] In some optional embodiments, the control unit 10 can control the first output unit 21 to adjust the second power signal to obtain an output power signal based on the second target parameter, and output the output power signal to the load device interface 12 to power the device to be powered connected to the load device interface 12.

[0060] Based on this, through the above-mentioned optional embodiments, on the one hand, the power adapter device 100 of the embodiment of the present application can effectively realize the function of power transfer to realize power supply to the device to be powered; on the other hand, the output power signal output by the first output unit 21 of the power adapter device 100 to the load device interface 12 can be dynamically adjusted in real time according to the second target parameter of the second power signal detected by the second detection unit 32, so that it can better adapt to the power supply needs of the device to be powered in different scenarios or scenario changes, and can also avoid the disadvantage of affecting the normal operation of the device to be powered due to inappropriate output power of the second target device providing power (for example, parameters are too high or too low, etc.).

[0061] The above-mentioned second interface 13 can be any type of interface. For example, in some examples, the second interface 13 can be a USB Type-C interface, or it can also be another type of interface. Optionally, the second target device in this application can be a charger, or it can also be other electronic devices with power output capabilities (for example, it can include but is not limited to mobile phones, tablet computers, computers, car machines, servers, game consoles, power banks and other electronic devices). For the convenience of explaining the embodiments of the present application, the second target device may also be referred to as Charger in the following text.

[0062] It can be understood that this solution can detect the target parameters during the use of the power adapter 100, and adjust the power signal received by the load device in real time through the first output unit 21 based on the target parameters to meet the needs of dynamic changes in the power supply of the load device. Optionally, this solution is different from the solution of directly supplying power to the load device on demand (for example, according to the rated current or voltage of the HOST and LOAD) after determining the power demand of the load device, and is also different from the solution of supplying power after the HOST and LOAD agree on the electrical signal. This solution can adjust the electrical signal in real time to achieve dynamic changes in the power supply of the load device in different scenarios or when the scenario changes to meet its needs. Optionally, the power adapter 100 can be provided with a second output unit 22, which can be responsible for the management of the output electrical signals of the entire device (including the power adapter 100 and the electronic devices connected to the various interfaces of the power adapter 100), such as power, so that the second output unit 22 can adjust the electrical signal parameters of each interface as needed. Optionally, the second output unit 22 can be connected simultaneously between the first interface 11 and the second interface 13, as well as between the load device interface 12 and the second interface 13. The electrical signal output by the second interface 12 is processed by the second output unit 22 and then transmitted to the first interface 11 and the load device interface 12 respectively, thereby achieving real-time synchronous adjustment of the electrical signals of the connected power supply device, load device, and host device, thereby achieving management of the electrical signal output of the entire device. Optionally, the electrical signal output by the second output unit 22 can be further processed before entering the first interface 11 and / or the load device interface 12.

[0063] The second power signal may be an electrical signal output by the second target device to the second interface 13. The second power signal may have a voltage within a certain range, which is not limited herein, and may be 5V to 20V in one example.

[0064] Optionally, when the first target device is connected to the first interface 11, and the second target device is also connected to the second interface 13, the first interface 11 will not supply power to the device to be powered, and the second target device outputs a second power signal to supply power to the device to be powered through the second interface 13. When the second target device is disconnected from the second interface 13, or is connected to the second interface 13 but does not output the second power signal, the first target device can output the first power signal to supply power to the device to be powered through the first interface 11. It can be seen that the application scenarios and timings for the first interface 11 and the second interface 13 to output power signals are different, which is why the first target device and the second target device are both counted as target devices, and the first interface 11 and the second interface 13 are both power interfaces.

[0065] In other words, the power supply possibility or power supply capacity of the first interface 11 and the second interface 13 can be used to determine that both can be power supply interfaces. That is, the above-mentioned first interface 11 and the second interface 13 both have the ability to supply power to the device to be powered, or the above-mentioned first interface 11 and the second interface 13 both have the possibility of becoming interfaces for supplying power to the device to be powered. For example, when the first interface 11 is connected to the first target device and the second interface 13 is not connected to an external device, the first interface 11 can be the power supply interface of the device to be powered. However, when the first interface 11 is connected to the first target device and the second interface 13 is connected to the second target device, the second target device can be a power supply device, and the power signal is transmitted to each device through the second interface 13. Therefore, it can be considered that the above-mentioned power interface includes the first interface 11 and the second interface 13.

[0066] In an exemplary application scenario, the device to be powered may be a head-mounted display device, the first target device may be the host end of the head-mounted display device, and the second target device may be the charging end. For example, the charging end may be a charger. The host end is connected to the first interface 11, the charging end is connected to the second interface 13, and the head-mounted display device is connected to the load device interface 12. For example, the host end may provide multimedia data (including at least one of video data, audio data, image data, etc.) for playback and display to the head-mounted display device, and the charging end outputs the second power signal through the power adapter 100 to provide the head-mounted display device with the output power signal adjusted by the first output unit 21, thereby powering the head-mounted display device, thereby enabling the head-mounted display device to work and meet the user's needs for entertainment through the head-mounted display device.

[0067] Alternatively, the second target parameter may include a current value determined based on the second power signal.

[0068] The second detection unit 32 in this application can be implemented using any suitable circuit structure. Figure 4 In the circuit structure shown, the second detection unit 32 may include a second current detection module 321. The second current detection module 321 may include a fourth resistor R4 and a second operational amplifier AMP2. The first end of the fourth resistor R4 is connected to the second interface 13, the second end of the fourth resistor R4 is connected to the load device interface 12, the non-inverting end of the second operational amplifier AMP2 is connected to the first end of the fourth resistor R4, the inverting end of the second operational amplifier AMP2 is connected to the second end of the fourth resistor R4, and the output end of the second operational amplifier AMP2 is connected to the control unit 10.

[0069] It can be understood that the current detection circuit composed of the fourth resistor R4 and the second operational amplifier AMP2 can enable the second current detection module 321 to effectively detect the current value flowing through the fourth resistor R2, that is, to obtain the second target parameter.

[0070] Optionally, refer to Figure 4 In the circuit structure shown, the control unit 10 may include an analog-to-digital conversion module ADC. The output end of the second operational amplifier AMP2 may be connected to the analog-to-digital conversion module ADC, and the detected third analog data may be output to the analog-to-digital conversion module ADC. The analog-to-digital conversion module ADC performs analog-to-digital conversion on the third analog data and processes it into third digital data that can indicate the current value. The control unit 10 may process the third digital data as the current value (i.e., the second target parameter) so as to control the first output unit 21 to adjust the second power supply signal based on the second target parameter to obtain an output power supply signal.

[0071] Optionally, the second detection unit 32 in the present application can also detect a voltage value. Figure 4 In the circuit structure shown, the second detection unit 32 may further include a second voltage detection module 322. The second voltage detection module 322 includes a fifth resistor R5 and a sixth resistor R6. The first end of the fifth resistor R5 is connected to the second interface 13. The first end of the sixth resistor R6 is connected to the second end of the fifth resistor R5. The second end of the sixth resistor R6 is grounded. The control unit 10 is connected to the electrical connection line between the second end of the fifth resistor R5 and the first end of the sixth resistor R6.

[0072] It is understandable that the resistor voltage divider circuit composed of the fifth resistor R5 and the sixth resistor R6 can be effectively used to detect voltage, and can enable the second voltage detection module 322 to effectively detect the voltage value at the second interface 13.

[0073] Optionally, refer to Figure 4 In the circuit structure shown, the control unit 10 can be connected to the electrical connection line between the second end of the fifth resistor R5 and the first end of the sixth resistor R6 via its analog-to-digital conversion module ADC, thereby obtaining fourth analog data that can reflect a voltage value. The analog-to-digital conversion module ADC then performs analog-to-digital conversion on the fourth analog data to process it into fourth digital data that can indicate a voltage value. The control unit 10 can process the fourth digital data as a voltage value.

[0074] Optionally, the second voltage detection module 322 can be used to detect whether the second target device is connected to the second interface 13. For example, when the second target device is connected to the second interface 13, the second power signal output by the second voltage detection module 322 will cause the fourth analog data provided to the control unit 10 by the second voltage detection module 322 to change, and thus the fourth digital data will also change. Therefore, the control unit 10 can determine in real time that the second target device is connected to the second interface 13 based on this change; conversely, if the second target device is not connected to the second interface 13, the above change will not occur, so the control unit 10 can determine in real time that the second target device is not connected to the second interface 13.

[0075] In some optional embodiments, when the second target device is connected to the second interface 13 , the first target device may switch from a mode of outputting the first power signal to a mode of receiving power.

[0076] In some optional embodiments, when the second target device is connected to the second interface 13, the control unit 10 can be used to send a switching signal to the first target device through the first interface 11, so that the first target device switches from a mode of outputting a first power signal to a mode of receiving power based on the switching signal.

[0077] Based on this, the power adapter 100 can be used to utilize the second target device connected to the second interface 13 to power the device to be powered connected to the load device interface 12, while also powering the first target device connected to the first interface 11, thereby ensuring that both the device to be powered and the first target device can work through the power provided by the second target device, thereby improving the battery life of at least one of the first target device and the device to be powered, and ensuring the use effect of, for example, a head-mounted display device waiting for the power supply device.

[0078] Optionally, when the first target device and the device to be powered are powered by the second target device, they can be charged according to their own charging characteristics to facilitate subsequent use.

[0079] In some optional embodiments, referring to Figure 2 、 Figure 3 or Figure 4 As shown, the second interface 13, the first interface 11, and the load device interface 12 can be electrically connected through the electrical connection point Vout. When the second target device is connected to the second interface 13, the second interface 13 can transmit the electrical signal derived from the second power supply signal to the first output unit 21 and the first interface 11 through the electrical connection point Vout.

[0080] It should be understood that through the above circuit structure, the second target device can simultaneously power the device to be powered connected to the load device interface 12 and the first target device connected to the first interface 11 through the power adapter 100, so that the power adapter 100 can improve the battery life of at least one of the first target device and the device to be powered, and improve the use effect of the head-mounted display device waiting for power supply, for example.

[0081] For example, Figure 4 As shown, the second end of the first resistor R1 is connected to the electrical connection point Vout, and is connected to the load device interface 12 through the electrical connection point Vout.

[0082] In some optional embodiments, reference Figure 4 As shown, the detection unit further includes a first detection unit 31, which is electrically connected between the electrical connection point Vout and the first interface 11. The first detection unit 31 is configured to detect an electrical signal transmitted from the electrical connection point Vout to the first interface 11, obtain a third target parameter, and send the third target parameter to the control unit 10. Optionally, the control unit 10 is further configured to determine an electrical signal to be output to a first target device connected to the first interface 11 based on the third target parameter.

[0083] It is understandable that the first detection unit 31 can be used in two power supply states, one of which is the state in which the first target device outputs the first power signal through the first interface 11 to supply power to the load device interface 12, and at this time the first detection unit 31 detects the first target parameter; the other power supply state is the state in which the first target device receives power from the second target device connected to the second interface 13 through the first interface 11, and at this time the first detection unit 31 detects the third target parameter. In this embodiment, the first detection unit 31 can perform multiple functions, so that the first target device connected to the first interface 11 can both supply power to the device to be powered LOAD and accept charging from the second target device. The setting of the power adapter 100 improves the use effect of, for example, a head-mounted display device waiting for power supply.

[0084] Optionally, the third target parameter may include a current value of the electrical signal transmitted from the electrical connection point Vout to the first interface 11 .

[0085] The optional structure of the first detection unit 31 has been described above, so it will not be repeated here. Here, a brief description of the detection of the third target parameter by the first detection unit 31 can be given. For example, for the first current detection module 311 included in the first detection unit 31, when the electrical connection point Vout transmits an electrical signal to the first interface 11, the output end of the first operational amplifier AMP1 outputs the detected fifth analog data to the analog-to-digital conversion module ADC, and the analog-to-digital conversion module ADC performs analog-to-digital conversion on the fifth analog data and processes it into fifth digital data that can indicate the current value. The control unit 10 can process the fifth digital data as a current value (i.e., the third target parameter) so as to determine the electrical signal output to the first target device connected to the first interface 11 based on the third target parameter.

[0086] It should be understood that in the above optional embodiment, the third target parameter is obtained by detecting the electrical signal transmitted from the electrical connection point Vout to the first interface 11 by the first detection unit 31, and the control unit 10 determines the electrical signal output to the first target device connected to the first interface 11 based on the third target parameter. On the one hand, the power adapter 100 effectively realizes the power transfer function, so that the second target device supplies power to the first target device while the second target device supplies power to the device to be powered. On the other hand, the electrical signal output by the power adapter 100 to the first target device is also dynamically adjustable. In this way, on the basis of being able to better adapt to the power supply requirements of the device to be powered in different scenarios, it can also better adapt to the power supply requirements of the first target device in different scenarios. Therefore, on the basis of being able to avoid the disadvantages of affecting the normal operation of the device to be powered due to inappropriate power output of the second target device (for example, parameters are too high or too low, etc.), it can also avoid the disadvantages of affecting the normal operation of the first target device due to inappropriate power output of the second target device (for example, parameters are too high or too low, etc.).

[0087] In some optional embodiments, the second target device can simultaneously power the device to be powered and the first target device, and the control unit dynamically adjusts the power supply to the first target device based on the third target parameter detected by the first detection unit 31, which is conducive to better adapting to the power supply requirements of electronic devices (i.e., the device to be powered) including but not limited to head-mounted display devices, thereby making the performance of the power adapter 100 higher.

[0088] In some optional embodiments, referring to Figure 2 、 Figure 3 or Figure 4 As shown, the power adapter 100 of the present application may further include a second output unit 22 connected between the second interface 13 and the electrical connection point Vout. The second output unit 22 is used to adjust the second power signal received from the second interface 13.

[0089] In some optional embodiments, the control unit 10 may also be configured to receive a third target parameter and / or a second target parameter, and send a third adjustment signal to the second output unit 22. After receiving the third adjustment signal and the second power signal, the second output unit 22 outputs an adjusted electrical signal to the electrical connection point Vout. Optionally, the third adjustment signal may be a control signal. Optionally, the control unit 10 may generate a third adjustment signal based on the third target parameter and / or the second target parameter, and send the third adjustment signal to the second output unit 22, thereby controlling the second output unit 22 to adjust the second power signal originating from the second target device to output an adjusted electrical signal (i.e., an adjusted electrical signal), so as to output the adjusted electrical signal to the electrical connection point Vout.

[0090] In some optional embodiments, the control unit 10 can be electrically connected to the second output unit 22, and can control the second output unit 22 to adjust the second power supply signal received from the second interface 13 based on the third target parameter and / or the second target parameter, so as to output the adjusted electrical signal to the electrical connection point Vout.

[0091] Based on this, in an embodiment of the present application, the control unit 10 controls the second output unit 22 based on the third target parameter and / or the second target parameter to adjust the second power signal received from the second interface 13, and outputs the adjusted electrical signal to the electrical connection point Vout through the second output unit 22. On the one hand, the electrical signal output to the electrical connection point Vout can be used to power the device to be powered and the first target device respectively to meet the dynamic needs of power supply or charging; on the other hand, the electrical signal output by the second output unit 22 is dynamically adjustable, which can avoid the normal operation of the device to be powered and / or the first target device due to inappropriate second power signal output by the second target device (for example, parameters are too high or too low, etc.) and / or inappropriate electrical signal output from the electrical connection point Vout to the first interface 11 (for example, parameters are too high or too low, etc.), thereby improving the power conversion performance.

[0092] For example, refer to Figure 4 As shown, in the second detection unit 32, the first end of the fourth resistor R4 of the second current detection module 321 is connected to the second interface 13 through the second output unit 22, and the second end of the fourth resistor R4 is connected to the electrical connection point Vout, and is also connected to the load device interface 12 through the electrical connection point Vout. This enables the second detection unit 32 to effectively detect the electrical signal output by the second output unit 22.

[0093] In this application, there is no specific restriction on the circuit structure of the second output unit 22, as long as it can meet the needs. In some optional embodiments, the second output unit 22 may include a DC-DC boost chopper circuit, that is, a DC-DC Buck-Boost circuit. This is a DC conversion circuit that can simultaneously achieve boost and buck functions, which has the advantages of lower input-output voltage difference, smaller internal loss, smaller temperature drift, higher output voltage stability, better load and linear regulation rate, wider operating temperature range, wider input voltage range, etc., and the peripheral circuit is relatively simple and easy to use. Through such a circuit structure, the current and / or voltage of the second power supply signal output from the second interface 13 can be effectively adjusted.

[0094] For example, refer to Figure 4 As shown, the second output unit 22 can be connected to the control unit 10 via an I2C bus, which may include an SCL line and an SDA line, so that the control unit 10 can adjust parameters such as the current and voltage output by the second output unit 22. Of course, this is only an example connection method and does not constitute any limitation to the embodiments of the present application.

[0095] In some optional embodiments, the control unit 10 may receive the third target parameter and the second target parameter and send a fourth adjustment signal to the first output unit 21. After receiving the fourth adjustment signal and the electrical signal input to the first output unit 21, the first output unit 21 outputs the output power signal to the load device interface 12. Optionally, the fourth adjustment signal may be a control signal. Optionally, the control unit 10 may generate a fourth adjustment signal based on the third target parameter and the second target parameter and send the fourth adjustment signal to the first output unit 21, thereby controlling the first output unit 21 to adjust the electrical signal input to the first output unit 21 so as to output the adjusted output power signal to the load device interface 12.

[0096] In some optional embodiments, the control unit can control the first output unit 21 to adjust the input electrical signal based on the third target parameter and the second target parameter to obtain an output power signal. The output power signal can support the operation of the device to be powered through the load device interface 12.

[0097] Based on this, the above-mentioned control unit 10 can control the first output unit 21 to adjust the input electrical signal to obtain an output power signal by integrating the third target parameter and the second target parameter, and then output the output power signal to the load device interface 12, which is conducive to better powering the device to be powered connected to the load device interface 12 to ensure the normal operation of the device to be powered.

[0098] For example, refer to Figure 4As shown, the current input to the electrical connection point Vout can be diverted from the electrical connection point Vout to each branch. For example, in theory, the current output from the electrical connection point Vout can be equal to the sum of the currents of each branch output from the electrical connection point Vout. Thus, the control unit 10 can control the first output unit 21 to dynamically adjust the input electrical signal based on at least the difference between the current values ​​of the second target parameter and the third target parameter, thereby obtaining an output power signal, thereby better avoiding the current value of the output power signal being too high or too low, thereby ensuring the normal operation of the device to be powered and improving the effect of power transfer.

[0099] In the embodiment of the present application, the power supply mode of the control unit 10 may not be limited. In some optional embodiments, the control unit 10 may be powered by the electrical signal at the electrical connection point Vout. For example, referring to Figure 4 As shown, the control unit 10 is connected between the electrical connection point Vout and the first output unit 21. For example, the working power interface of the control unit 10 is connected between the electrical connection point Vout and the first output unit 21. Therefore, the control unit 10 can receive the electrical signal input from the electrical connection point Vout. As a result, the control unit 10 can be effectively powered, thereby achieving normal operation and ensuring the normal operation of the power adapter 100.

[0100] In an exemplary application, referring to Figure 4 As shown, if the second target device is not connected to the second interface 13, the first target device can output the first power signal through the connected first interface 11, then the electrical connection point Vout obtains the electrical signal from the first interface 11, and the control unit 10 receives the electrical signal from the first interface 11, thereby obtaining power.

[0101] In another example application, referring to Figure 4 As shown, if the second target device is connected to the second interface 13, the second target device can output a second power signal through the connected second interface 13, the electrical signal from the second interface 13 can be transmitted to the electrical connection point Vout, and the control unit 10 receives the electrical signal from the second interface 13, thereby obtaining power.

[0102] The circuit structure between the control unit 10 and the electrical connection point Vout is not specifically limited in the embodiments of the present application. Figure 4As shown, the power adapter 100 may further include a step-down unit 50. The step-down unit 50 may be connected between the electrical connection point Vout and the first output unit 21, and the control unit 10 is connected between the electrical connection point Vout and the first output unit 21 through the step-down unit 50. For example, the working power interface of the control unit 10 may be connected to the step-down unit 50 so that the first interface 11 or the second interface 13 can provide an electrical signal that meets the operating voltage of the control unit 10. The control unit 10 receives the electrical signal at the electrical connection point Vout after the step-down unit 50 steps down the voltage; the first output unit 21 receives the electrical signal at the electrical connection point Vout after the step-down unit 50 steps down the voltage.

[0103] Based on this, in the embodiment of the present application, by providing the step-down unit 50, it is possible to prevent the adverse effects of excessively high voltage input to the control unit 10 on the control unit 10, thereby ensuring that the control unit 10 can receive appropriate power for normal operation. In addition, the step-down unit 50 is connected between the electrical connection point Vout and the first output unit 21, which can also ensure that the first output unit 21 can receive a suitable electrical signal from the electrical connection point Vout through the step-down unit 50, thereby better facilitating the output power signal to the load device interface 12, thereby powering the device to be powered connected to the load device interface 12.

[0104] The circuit structure of the step-down unit 50 is not specifically limited in the embodiments of the present application. For example, in some optional embodiments, the step-down unit 50 may include a first step-down module 51 and a second step-down module 52. The first step-down module 51 is connected between the electrical connection point Vout and the first output unit 21, and the second step-down module 52 is connected between the first step-down module 51 and the control unit 10. The control unit 10 receives the electrical signal that has been stepped down by the first step-down module 51 and the second step-down module 52. The first output unit 21 receives the electrical signal that has been stepped down by the first step-down module 51.

[0105] It should be understood that in the above-described optional embodiment of the present application, the step-down unit 50 includes two step-down modules, which can meet the different operating voltage requirements of the control unit 10 and the device to be powered. For example, the operating voltage required by the control unit 10 can generally be lower than the operating voltage required by the device to be powered. Therefore, the above-described circuit structure can simultaneously meet the supply voltage requirements of both the control unit 10 and the device to be powered, thereby improving the power transfer effect.

[0106] For example, the operating voltage required by the device to be powered may be around 5V, while the operating voltage required by the control unit 10 may be around 3.3V. Of course, this example is only one example with a wide range of current applications, and the specific operating voltage can be set as needed. The voltage reduction process will be further explained below with reference to this example.

[0107] For example, as described in the optional embodiment above, the voltage value of the first power signal output by the first target device can be between 5V and 20V. When the first target device is used to power the control unit 10 and the device to be powered, the voltage value of the electrical signal transmitted to the electrical connection point Vout can also be between 5V and 20V. The first step-down module 51 can perform a first step-down on the 5V to 20V electrical signal at the electrical connection point Vout, thereby stabilizing it at approximately 5V. The second step-down module 52 then performs a second step-down on the 5V obtained after the first step-down, thereby stabilizing it at approximately 3.3V. The control unit 10 receives 3.3V power and can enter a normal working state. In addition, the first output unit 21 can obtain the approximately 5V electrical signal obtained after the first step-down, and accept the control of the control unit 10 for adaptive adjustment, outputting an output power signal for powering the device to be powered, thereby realizing power supply to the device to be powered, so that the device to be powered can enter a working state.

[0108] For another example, as described above in the optional embodiment, the voltage value of the second power signal output by the second target device can be between 5V and 20V. When the second target device is used to power the control unit 10 and the device to be powered, the voltage value of the electrical signal output by the second output unit 22 to the electrical connection point Vout can also be between 5V and 20V. The first step-down module 51 can perform a first step-down on the 5V to 20V electrical signal at the electrical connection point Vout, thereby stabilizing it to approximately 5V. The second step-down module 52 then performs a second step-down on the 5V obtained after the first step-down, thereby stabilizing it to approximately 3.3V. The control unit 10 receives the 3.3V power supply and can enter a normal operating state. In addition, the first output unit 21 can obtain the approximately 5V electrical signal obtained after the first step-down, and accept the control of the control unit 10 for adaptive adjustment, outputting an output power signal for powering the device to be powered, thereby achieving power supply to the device to be powered, allowing the device to enter an operating state.

[0109] The specific circuit structures of the first step-down module 51 and the second step-down module 52 are not limited in this application. Optionally, the first step-down module 51 may include a DC-DC step-down conversion circuit (i.e., a DC-DC Buck circuit). For example, in one example, a DC-DC Buck circuit with an output of 5V may be used. Optionally, the second step-down module 52 may also include a DC-DC step-down conversion circuit (i.e., a DC-DC Buck circuit). In one example, a DC-DC Buck circuit with an output of 3.3V may be used. Stepping down the voltage using a DC-DC Buck circuit has the advantages of high efficiency, stable output, simple control, and low cost.

[0110] In some optional embodiments, referring to Figure 4As shown, the power adapter 100 may further include a switch unit 40, which may be connected between the first interface 11 and the electrical connection point Vout, and the switch unit 40 may also be connected to the control unit 10. The control unit 10 may control the switch unit 40 to be turned on or off. When the second target device is connected to the second interface 13, the control unit 10 is used to control the switch unit 40 to be turned off until the first interface 11 stops receiving the first power signal from the first target device. It should be noted that the turning on of the switch unit 40 here can be understood as the first interface 11 can transmit the power signal to the load device interface 12, and the turning off of the switch unit 40 can be understood as the first interface 11 no longer transmitting the power signal to the load device interface 12, but at this time the circuit between the first interface 11 and the load device interface 12 is not broken. In some optional embodiments, the turning off of the switch unit 40 can be understood as the second interface 12 no longer transmitting the electrical signal to the first interface 11. At this time, the switch unit 40 also has the function of preventing the circuit connected to the first interface 11 from instantaneously conducting in the reverse direction.

[0111] Based on this, by setting a switch unit 40 between the above-mentioned first interface 11 and the electrical connection point Vout, and controlling the switch unit 40 to be turned off when the second target device is connected to the second interface 13, until the first interface 11 stops receiving the first power signal from the first target device, it is possible to avoid the electrical connection point Vout receiving the electrical signal from the second target device and the electrical signal from the first target device at the same time when the second target device sends the second power signal through the second interface 13, thereby avoiding electrical signal conflicts, which is conducive to the second target device better supplying power to the first target device through the power adapter 100. Here, the switch unit 40 turns off the electrical signal, which will not affect the multimedia data transmission path between the first target device and the device to be powered.

[0112] Optionally, the above-mentioned first interface 11 can be a power interface with bidirectional input and output, which can accept electrical signals input by the first target device and can also output electrical signals to the first target device. As mentioned above, when the second target device is connected to the second interface 13, the control unit 10 can send a switching signal to the first target device through the first interface 11, so that the first target device switches from a mode of outputting a first power signal to a mode of receiving power based on the switching signal. On this basis, the control unit 10 can control the switch unit 40 to turn off until the first target device stops outputting the first power signal to the first interface 11. At this time, the first target device enters a mode of receiving power, and the first interface 11 can output an electrical signal to the first target device. Afterwards, the control unit 10 can control the switch unit 40 to turn on, so that the first interface 11 can obtain an electrical signal adjusted by the second power signal output by the second output unit 22 to the second target device from the electrical connection point Vout through the switch unit 40, thereby realizing power supply to the first target device.

[0113] The specific circuit structure of the switch unit 40 is not specifically limited in the embodiment of the present application. Figure 4 As shown, the switch unit 40 may include a first switch device 41 and a second switch device 42. The first switch device 41 includes a body diode. The first switch device 41 is connected between the first interface 11 and the electrical connection point Vout, with the anode and cathode of the body diode of the first switch device 41 connected to the first interface 11 and the electrical connection point Vout, respectively. The second switch device 42 is connected between the first switch device 41 and the control unit 10. The control unit 10 can control the first switch device 41 to be turned on or off through the second switch device 42.

[0114] In the above-described embodiment of the present application, by providing the above-described first switch device 41, when the first target device is connected to the first interface 11 and the second target device is not connected to the second interface 13, the first target device can supply power to the control unit 10 via the first switch device 41, allowing the control unit 10 to enter the operating state first. Thereafter, the control unit 10 that first enters the operating state can control the second switch device 42 to turn on the first switch device 41, and the first target device can then supply power to the control unit 10 via the turned-on switch device 40, thereby facilitating the continued operation of the control unit 10 and realizing the function of the power adapter 100. In addition, since the anode and cathode of the body diode of the first switching device 41 are respectively connected to the first interface 11 and the electrical connection point Vout, when the first switching device 41 is turned off, the electrical signal output by the second target device connected to the second interface 13 to the first interface 11 through the electrical connection point Vout cannot be reversely conducted instantaneously through the body diode, thereby ensuring that the first target device can properly switch from outputting the first power signal to receiving power based on the switching signal, so as to ensure that the second target device can conveniently supply power to the first target device after the first switching device 41 is turned on.

[0115] In some optional embodiments, referring to Figure 4 As shown, the first switching device 41 is a PMOS transistor with a body diode, and the second switching device 42 is an NMOS transistor. The gate of the second switching device 42 is electrically connected to the control unit 10, the source of the second switching device 42 is grounded, the drain of the second switching device 42 is connected to the gate of the first switching device 41, the drain of the first switching device 41 is connected to the first interface 11, and the source of the first switching device 41 is connected to the electrical connection point Vout. The anode and cathode of the body diode of the first switching device 41 are connected to the drain and source of the first switching device 41, respectively.

[0116] For example, refer to Figure 4As shown, after the first target device is connected to the first interface 11, the control unit 10 can send a high-level signal to the gate of the second switch device 42 (NMOS transistor) to turn on the second switch device 42. After the second switch device 42 is turned on, the gate of the first switch device 41 (PMOS transistor) is grounded and turned on. Conversely, the control unit 10 can send a low-level signal to the gate of the second switch device 42 (NMOS transistor) to turn off the second switch device 42. After the second switch device 42 is turned off, the first switch device 41 (PMOS transistor) is turned off.

[0117] For example, refer to Figure 4 As shown, the drain of the first switching device 41 is connected to the first interface 11 through the first resistor R1, and the drain of the first switching device 41 is connected to the electrical connection point Vout. Figure 4 As shown, the gate of the second switching device 42 can be connected to the GPIO port of the control unit 10. Of course, the above connection method is only an example.

[0118] Through the above-mentioned optional circuit structure, the second switch device 42 (NMOS tube) can effectively control the conduction and shutdown of the first switch device 41 (PMOS tube); and when the first target device is connected to the first interface 11 and the second target device is not connected to the second interface 13, the first target device can power the control unit 10 through the body diode of the first switch device 41 (PMOS tube), so that the control unit 10 can first enter the working state. Afterwards, the control unit 10 that first enters the working state can control the second switch device 42 to turn on the first switch device 41, and then the first target device can power the control unit 10 through the turned-on first switch device 41, thereby facilitating the continued operation of the control unit 10 and realizing the function of the power adapter 100. In addition, since the anode and cathode of the body diode of the first switching device 41 are respectively connected to the drain and source of the first switching device 41, and thus respectively connected to the first interface 11 and the electrical connection point Vout, when the first switching device 41 is turned off, the electrical signal output by the second target device connected to the second interface 13 to the first interface 11 through the electrical connection point Vout cannot be reversely instantaneously conducted through the body diode, thereby ensuring that the first target device can safely switch from outputting the first power signal to receiving power based on the switching signal, to ensure that the second target device can conveniently supply power to the first target device after the first switching device 41 is subsequently turned on. Finally, the power adapter 100 provided in this embodiment may not have specific restrictions on the order in which the first interface 11 and the second interface 13 are connected to the corresponding devices. When the first interface 11, the second interface 13 and the load device interface 12 are all connected to the corresponding devices, the system composed of each device and the power adapter 100 can all operate normally. Optionally, as Figure 4As shown, in addition to the first switching device 41 being a PMOS transistor and including a body diode, the second switching device 42 being an NMOS transistor may also include a body diode. It should be noted that the body diode may be a parasitic element inherent to the MOS transistor. When a large instantaneous reverse current is generated in the circuit, it can be conducted away through the body diode to prevent the MOS transistor from breaking down.

[0119] In some optional embodiments, referring to Figure 4 As shown, the power adapter 100 of the present application may further include a seventh resistor R7 and an eighth resistor R8. The first end of the seventh resistor R7 is connected to the load device interface 12, the second end of the seventh resistor R7 is connected to the first end of the eighth resistor R8, and the second end of the eighth resistor R8 is grounded. The control unit 10 may be connected to the electrical connection line between the second end of the seventh resistor R7 and the first end of the eighth resistor R8.

[0120] The seventh resistor R7 and the eighth resistor R8 form a resistor voltage divider circuit, which can effectively detect the voltage value at the load device interface 12. The above circuit structure can be used to detect the voltage value at the load device interface 12.

[0121] For example, refer to Figure 4 As shown, the analog-to-digital conversion module ADC of the control unit 10 can be connected to the electrical connection line between the second end of the seventh resistor R7 and the first end of the eighth resistor R8, so as to obtain sixth analog data that can reflect the voltage value. The analog-to-digital conversion module ADC then performs analog-to-digital conversion on the sixth analog data and processes it into sixth digital data that can indicate the voltage value. The control unit 10 can use the sixth digital data as the voltage value at the load device interface 12.

[0122] Optionally, the control unit 10 may also control the first output unit 21 to adjust the electrical signal obtained from the electrical connection point Vout based on the voltage value at the load device interface 12 to obtain an output power signal. The output power signal can be output to the device to be powered through the load device interface 12 to power the device to be powered.

[0123] Optionally, refer to Figure 4 As shown, when the power adapter 100 supplies power to the device to be powered connected to the load device interface 12 and the first target device connected to the first interface 11 through the second target device connected to the second interface 13, the control unit 10 can manage the power output of the entire power adapter 100 (including the power output to the first interface 11 and the power output to the load device interface 12) through the second output unit 22, and can manage the power output of the device to be powered through the first output unit 21.

[0124] Optionally, assuming that the second target device Charger is connected to the second interface 13, the first target device HOST is connected to the first interface 11, and the device to be powered LOAD is connected to the load device interface 12, when the second target device Charger supplies power to the device to be powered and the first target device through the power adapter 100, the power management state of the power adapter 100 can be explained in combination with the following expression:

[0125] P total =P host +P load +P mcu +P loss

[0126] Among them, P total P represents the power output by the second output unit 22, that is, the power of the second power signal actually output by the second target device Charger; host represents the power output from the first interface 11 to the first target device HOST; P load Indicates the power output from the load device interface 12 to the device to be powered LOAD; P mcu represents the power output from the electrical connection point Vout to the control unit 10; P loss Indicates power loss, which may include DC-DC conversion and line power loss, and generally varies within a certain range depending on the power consumption of the entire machine.

[0127] Correspondingly, the adjusted power signal output by the first output unit 21 is consistent with the above-mentioned P load Correspondingly, the third target parameter detected by the first detection unit 31 is consistent with the above P host Correspondingly, the second target parameter detected by the second detection unit 32 is consistent with the above P total correspond.

[0128] In some optional embodiments, combined with Figure 4 As shown, an optional circuit structure of the power adapter 100 according to an embodiment of the present application is generally described.

[0129] Reference Figure 4As shown, the power adapter 100 may include a first interface 11, a load device interface 12, and a second interface 13. Both the first interface 11 and the second interface 13 may serve as power interfaces. The first interface 11 is used to connect to the first target device HOST, the load device interface 12 is used to connect to the device to be powered LOAD, and the second interface 13 is used to connect to the second target device Charger. The second interface 13, the first interface 11, and the load device interface 12 are electrically connected via an electrical connection point Vout. The power adapter 100 may also include a first output unit 21, a second output unit 22, a first detection unit 31, a second detection unit 32, a switch unit 40, and a step-down unit 50. The switch unit 40 may include a first switch device 41 and a second switch device 42. The step-down unit 50 may include a first step-down module 51 and a second step-down module 52.

[0130] like Figure 4 As shown, the first detection unit 31 may include a first current detection module 311, which may include a first resistor R1 and a first operational amplifier AMP1. The first end of the first resistor R1 is connected to the first interface 11, and the second end of the first resistor R1 is connected to the electrical connection point Vout. The non-inverting terminal of the first operational amplifier AMP1 is connected to the first end of the first resistor R1, the inverting terminal of the first operational amplifier AMP1 is connected to the second end of the first resistor R1, and the output end of the first operational amplifier AMP1 is connected to the analog-to-digital conversion module ADC of the control unit 10.

[0131] like Figure 4 As shown, the first detection unit 31 may further include a first voltage detection module 312, which may include a second resistor R2 and a third resistor R3. The first end of the second resistor R2 is connected to the second end of the first resistor R1, the first end of the third resistor R3 is connected to the second end of the second resistor R2, and the second end of the third resistor R3 is grounded. The analog-to-digital conversion module ADC of the control unit 10 is connected to the electrical connection line between the second end of the second resistor R2 and the first end of the third resistor R3.

[0132] like Figure 4 As shown, the first switching device 41 can be a PMOS transistor with a body diode. The second switching device 42 is an NMOS transistor. The gate of the second switching device 42 is electrically connected to the control unit 10, and the source of the second switching device 42 is grounded. The drain of the second switching device 42 is connected to the gate of the first switching device 41. The drain of the first switching device 41 is connected to the first interface 11 via a first resistor R1, and the source of the first switching device 41 is connected to the electrical connection point Vout. The anode and cathode of the body diode of the first switching device 41 are connected to the drain and source of the first switching device 41, respectively.

[0133] like Figure 4 As shown, the first buck module 51 and the second buck module 52 may both include a DC-DC Buck circuit. The first buck module 51 is connected between the electrical connection point Vout and the load switch module 211 of the first output unit 21, and the second buck module 52 is connected between the first buck module 51 and the control unit 10.

[0134] like Figure 4 As shown, the first output unit 21 may include a load switch module 211 and an adjustable resistor module 212 connected to each other. The load switch module 211 is connected between the first output unit 21 and the load device interface 12. The load switch module 211 and the adjustable resistor module 212 are also connected to the control unit 10. Optionally, the load switch module 211 can be connected to a GPIO (General-Purpose Input / Output) port of the control unit 10, and the adjustable resistor module 212 can be connected to the control unit 10 via an I2C bus, which may include an SCL line and an SDA line.

[0135] like Figure 4 As shown, the second interface 13 is connected to the electrical connection point Vout through the second output unit 22. The second output unit 22 may include a DC-DC Buck Boost circuit, and the second output unit 22 may be connected to the control unit 10 through another I2C bus. The I2C bus may include an SCL line and an SDA line.

[0136] like Figure 4 As shown, the second detection unit 32 may include a second current detection module 321. The second current detection module 321 includes a fourth resistor R4 and a second operational amplifier AMP2. The first end of the fourth resistor R4 is connected to the second interface 13 via the second output unit 22, and the second end of the fourth resistor R4 is connected to the electrical connection point Vout. The non-inverting terminal of the second operational amplifier AMP2 is connected to the first end of the fourth resistor R4, the inverting terminal of the second operational amplifier AMP2 is connected to the second end of the fourth resistor R4, and the output end of the second operational amplifier AMP2 is connected to the analog-to-digital conversion module ADC of the control unit 10.

[0137] like Figure 4 As shown, the second detection unit 32 may include a second voltage detection module 322, which may include a fifth resistor R5 and a sixth resistor R6. The first end of the fifth resistor R5 is connected to the second interface 13, the first end of the sixth resistor R6 is connected to the second end of the fifth resistor R5, and the second end of the sixth resistor R6 is grounded. The analog-to-digital conversion module ADC of the control unit 10 is connected to the electrical connection line between the second end of the fifth resistor R5 and the first end of the sixth resistor R6.

[0138] like Figure 4 As shown, the power adapter 100 may further include a seventh resistor R7 and an eighth resistor R8. A first end of the seventh resistor R7 is connected to the load device interface 12, a second end of the seventh resistor R7 is connected to a first end of the eighth resistor R8, and a second end of the eighth resistor R8 is grounded. The analog-to-digital conversion module ADC of the control unit 10 is connected to the electrical connection line between the second end of the seventh resistor R7 and the first end of the eighth resistor R8.

[0139] Both the first target device and the second target device can output power signals. The second interface 13 can be a unidirectional input power interface that receives a power signal input from the second target device. The first interface 11 can be a bidirectional input and output power interface that can receive a power signal input from the first target device and can also output a power signal to the first target device. The load device interface 12 can be a unidirectional output interface that supplies power to the connected device to be powered.

[0140] It is understandable that in the working mode exemplified below, the voltage of the first power signal that can be output by the first target device HOST is between 5V and 20V, the voltage of the second power signal that can be output by the second target device Charger is between 5V and 20V, the power supply voltage required by the device to be powered LOAD is 5V, and the control unit 10 is an MCU and the required power supply voltage is 3.3V. Here, the explanation can be made by assuming that the device to be powered LOAD is a head-mounted display device (taking AR glasses as an example), the first target device HOST is the host end of the head-mounted display device, and the second target device Charger is the charger of the head-mounted display device.

[0141] The following is the above Figure 4 Some exemplary operating modes of the power adapter 100 are described below:

[0142] Working mode 1 (the host HOST can supply power to the LOAD through the power adapter 100):

[0143] When the second target device Charger is not connected to the second interface 13, when the first target device HOST is connected to the first interface 11, the first target device HOST can output the first power signal through the first interface 11, and supply power to the control unit 10 through the body diode of the first switching device 41 (PMOS tube), the electrical connection point Vout, the first step-down module 51 and the second step-down module 52, so that the control unit 10 first enters the working state.

[0144] The control unit 10 can control the second switching device 42 (NMOS transistor) to conduct, thereby grounding the gate of the first switching device 41 (PMOS transistor) and conducting. The first target device HOST inputs a first power signal to the first interface 11, and power is supplied to the control unit 10 via the first switching device 41, the electrical connection point Vout, the first step-down module 51, and the second step-down module 52. The first target device HOST outputs the first power signal. The first current detection module 311 (including a first operational amplifier AMP1 and a first resistor R1) in the first detection unit 31 detects the current value of the first power signal as the first target parameter. If the output current of the first target device HOST is too high, the control unit 10 controls the resistance value of the adjustable resistor module 212 of the first output unit 21 to change. The load switch module 211 of the first output unit 21 can adjust the electrical signal after the voltage is stepped down from the first step-down module 51 based on the resistance value of the adjustable resistor module 212, adjust the output current limit, and output the adjusted output power signal to the load device interface 12 to power the device to be powered.

[0145] The device to be powered (LOAD) can be connected to the load device interface 12 before or after the first target device (HOST) is connected to the first interface 11. If the device to be powered (LOAD) is connected to the load device interface 12 after the first target device (HOST) is connected to the first interface 11, the control unit 10 can detect whether the device to be powered (LOAD) is connected to the load device interface 12 using a resistor divider circuit for voltage detection composed of the seventh resistor R7 and the eighth resistor R8. If so, the control unit 10 can then control the first output unit 21 to adjust the obtained electrical signal, adjust the output current limit, and output an output power signal to the load device interface 12 to power the device to be powered (LOAD).

[0146] During operation of the control unit 10, if the second target device, Charger, is not connected to the second interface 13, the second output unit 22 is turned off. The control unit 10 uses the second voltage detection module 322 (including the fifth resistor R5 and the sixth resistor R6) in the second detection unit 32 to detect voltage changes at the second interface 13 in real time to determine whether the second target device 13 is connected to the second interface 13. In operating mode 1, the host HOST (the first target device) can also send multimedia data to the powered device LOAD connected to the load device interface via the first interface.

[0147] Working mode 2 (Charger can supply power to LOAD through the power adapter 100):

[0148] When the first target device HOST is not connected to the first interface 11, if the second target device Charger is connected to the second interface 13, the control unit 10 can turn on the second output unit 22 through the second voltage detection module 322 (including the fifth resistor R5 and the sixth resistor R6), and the second target device Charger can input the second power signal to the second interface 13, and power the control unit 10 through the second output unit 22, the fourth resistor R4, the electrical connection point Vout, the first step-down module 51 and the second step-down module 52.

[0149] The second target device Charger outputs a second power signal, and the control unit 10 controls the second output unit 22 to adjust the second power signal to the electrical connection point Vout. The control unit 10 also controls the resistance value of the adjustable resistance module 212 of the first output unit 21 based on the third target parameter detected by the first detection unit 31 and the second target parameter detected by the second detection unit 32, so that the load switch module 211 adjusts the electrical signal obtained from the electrical connection point Vout based on the resistance value to obtain an output power signal, and outputs the output power signal to the load device interface 12 to power the device to be powered LOAD.

[0150] Working mode 3 (Charger can supply power to LOAD and HOST through the power adapter 100):

[0151] The second target device, Charger, is connected to the second interface 13 and inputs a second power signal to the second interface 13. The second voltage detection module 322 (including the fifth resistor R5 and the sixth resistor R6) detects the connection of the second target device, Charger. The second output unit 22 is turned on and supplies power to the control unit 10 via the fourth resistor R4, the electrical connection point Vout, the first step-down module 51, and the second step-down module 52.

[0152] Charger supplies power to LOAD: the second target device Charger outputs a second power signal, the control unit 10 controls the second output unit 22 to adjust the second power signal to the electrical connection point Vout, and the control unit 10 also controls the resistance value of the adjustable resistance module 212 of the first output unit 21 based on the third target parameter detected by the first detection unit 31 and the second target parameter detected by the second detection unit 32, so that the load switch module 211 adjusts the electrical signal obtained from the electrical connection point Vout based on the resistance value to obtain an output power signal, and outputs the output power signal to the load device interface 12 to power the device to be powered LOAD.

[0153] Furthermore, the working mode 3 may include the following two situations:

[0154] ① When the Charger is first connected to the second interface 13 and the Host is later connected to the first interface 11, the Charger charges the Host: When the first voltage detection module 312 (including the second resistor R2 and the third resistor R3) detects that the first target device HOST is connected to the first interface 11, the control unit 10 controls the second switch device 42 (NMOS transistor) to conduct through the GPIO port and the first switch device 41 (PMOS transistor) to be grounded and turned on. The control unit 10 can then control the second output unit 22 in real time to adjust the second power signal to the electrical connection point Vout based on the third target parameter of the electrical signal transmitted from the electrical connection point Vout to the first interface 11 as detected by the first detection unit 31. Subsequently, a portion of the electrical signal at the electrical connection point Vout is transmitted to the first target device HOST through the first switch device 41, and the other portion is transmitted to the load device LOAD through the first step-down module 51, the first output unit 21, and the load device interface 12 to supply power to the device to be powered LOAD (refer to the "Charger supplies power to LOAD" section in Operating Mode 3 for understanding).

[0155] ② In the case where the HOST is first connected to the first interface 11 and the Charger is later connected to the second interface 13, the Charger supplies power to the HOST: If the first target device HOST is already connected to the first interface 11 before the second target device Charger is connected to the second interface 13, then when the second target device Charger is connected to the second interface 13, the control unit 10 can send a switching signal to the first target device HOST through the first interface 11, so that the first target device switches from the mode of outputting the first power signal to the mode of receiving power based on the switching signal HOST. The control unit 10 can also control the second switching device 42 to turn off, thereby controlling the first switching device 41 to turn off. After the first target device switches to the mode of receiving power, the control unit 10 can control the second switching device 42 to turn on, thereby controlling the first switching device 41 to turn on. The control unit 10 can control the second output unit 22 to adjust the second power signal in real time based on the third target parameter of the electrical signal transmitted from the electrical connection point Vout to the first interface 11 detected by the first detection unit 31, so as to provide it to the electrical connection point Vout. Subsequently, a portion of the electrical signal at the electrical connection point Vout is transmitted through the first switch device 41 and the first resistor R1 to power the first target device HOST, while the remaining portion is transmitted through the first step-down module 51, the first output unit 21, and the load device interface 12 to power the device to be powered LOAD (see the "Charger Powering LOAD" section in Operating Mode 3 for further explanation). It will be appreciated that the aforementioned switch unit 40 not only disconnects and connects the circuit between the first interface and the electrical connection point Vout, but the body diode of the first switch device 41 also prevents instantaneous reverse conduction of this portion of the circuit when a second target device is inserted, thereby protecting the safety of the HOST device.

[0156] It should be understood that the above Figure 4 The circuit structure and working mode are described as examples only and are not intended to limit the embodiments of the present application.

[0157] According to the second aspect of the embodiment of the present application, referring to Figure 5 As shown, a power supply system is also provided, which includes: at least one target device, a device to be powered, and a power adapter 100 as any one of the first aspects, wherein the target device is connected to the power interface of the power adapter 100, and the device to be powered is connected to the load device interface 12 of the power adapter 100.

[0158] It should be understood that since the power adapter 100 in the power supply system adopts the power adapter 100 in the first aspect, the performance of the power adapter 100 is better and can better adapt to the power supply requirements of electronic devices including but not limited to head-mounted display devices (i.e., devices to be powered), so the power supply system can also have better performance and can better adapt to power supply requirements.

[0159] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". It should be noted that the concepts of "first", "second", etc. mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units. It should be noted that the modifications of "one" and "a plurality of" mentioned in this application are illustrative rather than restrictive. Those skilled in the art should understand that unless the context clearly indicates otherwise, it should be understood as "one or more".

[0160] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and not to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A power adapter, characterized in that: include: A power interface, used to connect to a target device that provides power; Load device interface, used to connect to the device to be powered; a first output unit, connected between the power interface and the load device interface, and configured to adjust a power signal received from the power interface; a detection unit, connected between the power interface and the control unit, configured to detect target parameters of the obtained power signal and send the target parameters to the control unit; The control unit is connected to the first output unit and is configured to receive the target parameter and send an adjustment signal to the first output unit; After receiving the adjustment signal and the power signal, the first output unit outputs the output power signal to the load device interface to supply power to the device to be powered connected to the load device interface.

2. The power adapter according to claim 1, wherein: The power interface includes a first interface, and the first interface is used to connect to a first target device; The first output unit is connected between the first interface and the load device interface; The detection unit includes a first detection unit, the first detection unit is used to detect a first target parameter of a first power signal input from the first interface, and send the first target parameter to the control unit; The control unit receives the first target parameter and sends a first adjustment signal to the first output unit; After receiving the first adjustment signal and the first power signal, the first output unit outputs the output power signal to the load device interface to supply power to the device to be powered connected to the load device interface.

3. The power adapter according to claim 1, wherein: The power interface includes a first interface and a second interface, the first interface is used to connect to a first target device, and the second interface is used to connect to a second target device, wherein the second interface is used to receive a second power signal; The first output unit is connected between the second interface and the load device interface; The detection unit includes a second detection unit, the second detection unit is used to detect a second target parameter of the second power signal transmitted by the second interface, and send the second target parameter to the control unit; The control unit receives the second target parameter and sends a second adjustment signal to the first output unit; After receiving the second adjustment signal and the second power signal, the first output unit outputs the output power signal to the load device interface to supply power to the device to be powered connected to the load device interface.

4. The power adapter according to claim 3, wherein: When the second target device is connected to the second interface, the first target device switches from a mode of outputting the first power signal to a mode of receiving power.

5. The power adapter according to claim 3, wherein: The second interface, the first interface and the load device interface are electrically connected via an electrical connection point; When the second target device is connected to the second interface, the second interface is configured to transmit an electrical signal derived from a second power supply signal to the first output unit and the first interface through the electrical connection point.

6. The power adapter according to claim 5, wherein: The detection unit also includes a first detection unit, which is electrically connected between the electrical connection point and the first interface. The first detection unit is used to detect the electrical signal transmitted from the electrical connection point to the first interface, obtain a third target parameter, and send the third target parameter to the control unit.

7. The power adapter according to claim 6, wherein: The power adapter further includes a second output unit connected between the second interface and the electrical connection point; The second output unit is configured to adjust a second power signal received from the second interface; The control unit is further configured to receive the third target parameter and / or the second target parameter, and send a third adjustment signal to the second output unit; After receiving the third adjustment signal and the second power signal, the second output unit outputs an adjustment electrical signal to the electrical connection point.

8. The power adapter according to claim 7, wherein: the control unit is configured to receive the third target parameter and the second target parameter, and send a fourth adjustment signal to the first output unit; After receiving the fourth adjustment signal and the electrical signal input to the first output unit, the first output unit outputs the output power signal to the load device interface.

9. The power adapter according to any one of claims 5 to 8, wherein: The control unit is connected between the electrical connection point and the first output unit; The control unit is used to receive the electrical signal input from the electrical connection point.

10. The power adapter according to claim 9, wherein: The power adapter further includes a voltage reduction unit; The step-down unit is connected between the electrical connection point and the first output unit, and the control unit is connected between the electrical connection point and the first output unit through the step-down unit; The control unit receives the electrical signal after the voltage reduction by the voltage reduction unit from the electrical connection point; The first output unit receives the electrical signal whose voltage is stepped down by the step-down unit from the electrical connection point.

11. The power adapter according to claim 10, wherein: The step-down unit includes a first step-down module and a second step-down module; The first step-down module is connected between the electrical connection point and the first output unit, and the second step-down module is connected between the first step-down module and the control unit; The control unit receives the electrical signal that has been stepped down in sequence by the first step-down module and the second step-down module; The first output unit receives the electrical signal whose voltage is stepped down by the first step-down module.

12. The power adapter according to claim 10 or 11, wherein: The power adapter further includes: a switch unit connected between the first interface and the electrical connection point, and the switch unit is also connected to the control unit; The control unit is used to control the switch unit to be turned on or off; Wherein, when the second target device is connected to the second interface, the control unit is used to control the switch unit to be turned off until the first interface stops receiving the first power signal from the first target device.

13. The power adapter according to claim 12, wherein: The switching unit includes a first switching device and a second switching device, wherein the first switching device has a body diode; The first switching device is connected between the first interface and the electrical connection point, and the anode and cathode of the body diode of the first switching device are connected to the first interface and the electrical connection point respectively, and the second switching device is connected between the first switching device and the control unit; The control unit controls the first switching device to be turned on or off through the second switching device.

14. The power adapter according to claim 13, wherein: The first switching device is a PMOS transistor with a body diode, and the second switching device is an NMOS transistor; The gate of the second switching device is electrically connected to the control unit, the source of the second switching device is grounded, the drain of the second switching device is connected to the gate of the first switching device, the drain of the first switching device is connected to the first interface, and the source of the first switching device is connected to the electrical connection point; The anode and cathode of the body diode of the first switching device are connected to the drain and source of the first switching device respectively.

15. The power adapter according to any one of claims 1 to 8, wherein: The target parameter includes a current value.

16. A power supply system, characterized in that: include: At least one target device, a device to be powered, and a power adapter as described in any one of claims 1-15, wherein the target device is connected to the power interface of the power adapter, and the device to be powered is connected to the load device interface of the power adapter.

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