Power supply capability judging device, electronic device, and power supply capability judging method

Abstract

The present application provides a power supply capability judging device for judging a power supply capability of a power supply, comprising a connector, a load circuit, a switch circuit, a voltage monitoring circuit and a processing circuit. The connector is used for receiving the power supply to output an input voltage at a power supply output end. The switch circuit is electrically connected between the load circuit and the power supply output end. The voltage monitoring circuit is electrically connected to the power supply output end and used for monitoring the input voltage to generate a monitoring voltage value. The processing circuit is electrically connected to the voltage monitoring circuit and the switch circuit and used for controlling the switch circuit. Under the control of the processing circuit, the monitoring voltage value is received and the power supply capability of the power supply is judged according to the monitoring voltage value.

Description

Technical Field

[0001] This invention application relates to a power capability judgment device, and more particularly to a power capability judgment device and method that can output a power capability index based on the power capability. Background Technology

[0002] Current Universal Serial Bus (USB) interfaces can provide power capacities of 5V 500mA for USB 2.0 and 5V 900mA for USB 3.0 and above. Commercially available USB power adapters can supply power exceeding 5V 500mA (e.g., 5V 1A or 5V 2.4A). However, users may not be aware of the power capacity of the USB interface or adapter they are using. This could lead to users plugging electronic devices requiring higher power into USB power supplies with lower capacity, resulting in insufficient power and the device failing to start. Similar issues can occur with High Definition Multimedia Interface (HDMI). Therefore, a new method and architecture are needed to quickly determine power capacity with minimal or no side effects to address these problems. Summary of the Invention

[0003] One object of the present invention is to provide a power capability determination device and method. This power capability determination device can determine the power capability of the connected power supply, so that an electronic device equipped with the power capability determination device of the present invention can set different processing modes according to the current power capability of the power supply, thereby solving the relevant problems of the prior art.

[0004] According to an embodiment of the present invention, a power supply capability determination device is provided for determining the power supply capability of a power source. The device includes a connector, a load circuit, a switching circuit, a voltage monitoring circuit, and a processing circuit. The connector receives the power source to output an input voltage at a power output terminal. The load circuit includes at least one load. The switching circuit is electrically connected between the load circuit and the power output terminal and includes at least one switch. The voltage monitoring circuit is electrically connected to the power output terminal and monitors the input voltage to generate a monitoring voltage value. The processing circuit is electrically connected to the voltage monitoring circuit and the switching circuit and controls the switching circuit. Under the control of the processing circuit, the processing circuit receives the monitoring voltage value and determines the power supply capability of the power source based on the monitoring voltage value.

[0005] According to another embodiment of the present invention, an electronic device includes a power capability determination device, wherein the electronic device is further configured to process an input signal and set the processing mode of the input signal according to the power capability of the power source.

[0006] According to another embodiment of the present invention, a power supply capability determination method includes: receiving a power supply to output an input voltage at a power supply output terminal; monitoring the input voltage to generate a monitoring voltage value; electrically connecting a switching circuit between the power supply output terminal and a load circuit, wherein the load circuit includes at least one load and the switching circuit includes at least one switch; controlling the switching circuit; and receiving the monitoring voltage value under the control of the switching circuit, and determining a power supply capability of the power supply based on the monitoring voltage value.

[0007] One advantage of this invention is that it can quickly determine the power supply capability of a power source and generate a power supply capability index based on different loads. This allows an electronic device equipped with the power supply capability determination device of this invention to determine whether it can start up based on the power supply capability index, or to perform different operations based on different power supply capability indices. Compared to existing related technologies, the power supply capability determination device of this invention can achieve power supply capability determination with no or minimal side effects. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of a power capability determination device that can be applied to determine power capability in an electronic device according to an embodiment of the present invention.

[0009] Figure 2 This is a block diagram of a power capability determination device according to a first embodiment of the present invention.

[0010] Figure 3 This is a block diagram of a power capability determination device according to a second embodiment of the present invention.

[0011] Figure 4 This is a flowchart of a power capability determination method according to an embodiment of the present invention.

[0012] Figure 5 This is a block diagram of a power capability determination device according to an embodiment of the present invention applied to a playback system having a connection device.

[0013] Figure 6 For example Figure 5 The diagram shows a schematic of the connecting device product.

[0014] Figure 7 A block diagram showing a power capability determination device according to an embodiment of the present invention applied to a playback system with an adapter cable.

[0015] Figure 8 For example Figure 7 The diagram shows the adapter cable product.

[0016] Symbol explanation:

[0017] 100, 300: Power supply capability assessment device

[0018] 102, 302: Connectors

[0019] 104, 304: Voltage monitoring circuit

[0020] 106, 306: Processing circuit

[0021] 110, 310: Switching circuit

[0022] 111, 311: First switch

[0023] 112, 312: Second switch

[0024] 113: Third Switch

[0025] 120, 320: Load circuit

[0026] 121, 321: First load

[0027] 122, 322: Second load

[0028] 123: Third Load

[0029] 200: Electronic devices

[0030] 202: Input Interface Connector

[0031] 204: Signal Processing Circuit

[0032] 206: Output Interface Connector

[0033] 208: Power Interface Connector

[0034] 210: Power supply

[0035] 400: Flowchart

[0036] S402~S428: Steps

[0037] 500: Connecting device

[0038] 502, 740: USB cable

[0039] 504, 760: media player

[0040] 506, 750: Monitors

[0041] 510: USB connector

[0042] 512, 730: HDMI connectors

[0043] 700: Adapter cable

[0044] PWR_IDX: Power Capacity Index

[0045] N_PWR, N_PWR1: Power output terminals

[0046] V_IN, V_IN1: Monitored voltage values

[0047] V_TH, V_TH1: Thresholds Detailed Implementation

[0048] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a power capability determination device 100 according to an embodiment of the present invention, which can be applied to perform power capability determination in an electronic device 200. Figure 1 As shown, the electronic device 200 may include an input interface connector 202, a signal processing circuit 204, an output interface connector 206, a power interface connector 208, and the power capability determination device 100 of the present invention. The input interface connector 202 receives an input signal and transmits it to the signal processing circuit 204. The signal processing circuit 204 processes the input signal and generates an output signal. The output interface connector 206 outputs the output signal. The power interface connector 208 receives a power supply 210 and transmits it to the signal processing circuit 204 and the power capability determination device 100. Any of the input interface connector 202, output interface connector 206, and power interface connector 208 can be a Universal Serial Bus (USB) connector or a High Definition Multimedia Interface (HDMI) connector. In some embodiments, the input interface connector 202 and the power interface connector 208 are implemented as a single connector. For example, when the input signal comes from a player and the input interface is HDMI, the input interface connector 202 and the power interface connector 208 are combined into a single HDMI connector, simultaneously receiving an input signal and a power supply from the player. In some embodiments, the output interface connector 206 and the power interface connector 208 are implemented as a single connector. For example, when the output signal is output to a display and the output interface is USB, the output interface connector 206 and the power interface connector 208 are combined into a single USB connector, simultaneously outputting an output signal to the display and receiving a power supply from the display.

[0049] The power capability determination device 100 outputs a power capability index PWR_IDX to the signal processing circuit 204. However, the power capability index PWR_IDX may vary depending on the power interface. This invention provides two embodiments. Please refer to... Figure 2 , Figure 2 This is a block diagram of a power capability determination device 100 according to a first embodiment of the present invention. Figure 2 As shown, the power capability determination device 100 of the first embodiment of the present invention includes a connector 102, a voltage monitoring circuit 104, a switching circuit 110, a load circuit 120, and a processing circuit 106. The connector 102 is used to receive a power source (e.g., Figure 1 The power supply 210 connected to the power interface connector 208 (shown) outputs an input voltage at a power output terminal N_PWR. In this embodiment, connector 102 is a USB power connector. If the power interface connector 208 of the electronic device 200 is a USB interface, then connector 102 and power interface connector 208 can be combined into a single USB power connector. Load circuit 120 includes multiple different loads (e.g., a first load 121, a second load 122, and a third load 123). Switch circuit 110 is electrically connected between load circuit 120 and the power output terminal N_PWR of connector 102. Switch circuit 110 includes multiple switches, each electrically connected to a different load in load circuit 120. For example, switch circuit 110 includes a first switch 111, a second switch 112, and a third switch 113, and the first switch 111, second switch 112, and third switch 113 are electrically connected to the first load 121, second load 122, and third load 123, respectively. Voltage monitoring circuit 104 is electrically connected to the power output terminal N_PWR of connector 102 and is used to monitor the input voltage to generate a monitoring voltage value V_IN. Processing circuit 106 is electrically connected to voltage monitoring circuit 104 and switching circuit 110, and is used to control first switch 111, second switch 112 and third switch 113. Under the control of switching circuit 110 by processing circuit 106, it receives the monitoring voltage value V_IN and determines the power supply (e.g., based on monitoring voltage value V_IN). Figure 1 The power supply capability of the power supply shown in Figure 210.

[0050] For example, when connector 102 receives a USB power supply and outputs an input voltage, voltage monitoring circuit 104 monitors and detects the input voltage and generates a monitoring voltage value V_IN. Processing circuit 106 determines whether the monitoring voltage value V_IN is greater than a threshold V_TH. Initially, the first switch 111, the second switch 112, and the third switch 113 are all switched off. Since the minimum voltage of a USB power supply at its available current is 4.75 volts (V) according to USB specifications, the threshold V_TH can be set to 4.75 volts. If the monitoring voltage value V_IN (i.e., the input voltage) is not greater than the threshold V_TH (e.g., 4.75 volts), processing circuit 106 generates a power failure index Index_0 (i.e., PWR_IDX = Index_0) to indicate the power supply's capability (i.e., power failure). If the monitored voltage value V_IN (i.e., the input voltage) is greater than the threshold V_TH (e.g., 4.75 volts), the processing circuit 106 switches on the first switch 111 to electrically connect the power output terminal N_PWR to the first load 121 (the remaining second switches 112 and third switches 113 remain off). The processing circuit 106 then determines the monitored voltage value V_IN. If the monitored voltage value V_IN is not greater than the threshold V_TH (e.g., 4.75 volts), the processing circuit 106 generates a first power capability index Index_1 (i.e., PWR_IDX = Index_1). If the monitored voltage value V_IN is still greater than the threshold V_TH, the processing circuit 106 closes the first switch 111 and opens the second switch 112, while the third switch 113 remains off. In this embodiment, the first load 121 is set as a load to detect whether the power supply can provide 0.5 amp current. That is, when the monitoring voltage value V_IN when the power supply output terminal N_PWR is electrically connected to the first load 121 is greater than the threshold V_TH (e.g., 4.75 volts), it means that the power supply can output 0.5 amp current. However, the present invention is not limited to this, and the load value in the load circuit can be changed as needed. Processing circuit 106 opens the second switch 112 to electrically connect the power output terminal N_PWR to the second load 122 (the remaining first switch 111 and third switch 113 remain closed), and determines the monitoring voltage value V_IN at this time. If the monitoring voltage value V_IN is not greater than the threshold V_TH (e.g., 4.75 volts), processing circuit 106 generates a second power capability index Index_2 (i.e., PWR_IDX = Index_2); if the monitoring voltage value V_IN is greater than the threshold V_TH, processing circuit 106 closes the second switch 112 and opens the third switch 113, while the first switch 111 remains closed.Processing circuit 106 opens the third switch 113 to electrically connect the power output terminal to the third load 123 (the remaining first switches 111 and second switches 112 remain closed), and determines the current monitoring voltage value V_IN. If the current monitoring voltage value V_IN is not greater than the threshold V_TH (e.g., 4.75 volts), processing circuit 106 generates a third power capability index Index_3 (i.e., PWR_IDX = Index_2); if the current monitoring voltage value V_IN is still greater than the threshold V_TH, processing circuit 106 generates a fourth power capability index Index_4 (i.e., PWR_IDX = Index_4).

[0051] In the first embodiment of the present invention, connector 102 is a USB power connector. Therefore, the first load 121 can be set as a load to detect whether the power supply can provide 0.5 amps of current, the second load 122 can be set as a load to detect whether the power supply can provide 1 amp of current, and the third load 123 can be set as a load to detect whether the power supply can provide 1.5 amps of current. However, the present invention is not limited to this, and the load value in the load circuit can be changed as needed. In other words, when the power supply capability assessment device 100 generates a damaged power supply capability index Index_0, it means that the power supply may be damaged; when the power supply capability assessment device 100 generates a first power supply capability index Index_1, it means that the current that the power supply can provide is less than 0.5 amps; when the power supply capability assessment device 100 generates a second power supply capability index Index_2, it means that the current that the power supply can provide is more than 0.5 amps but less than 1 amp; when the power supply capability assessment device 100 generates a third power supply capability index Index_3, it means that the current that the power supply can provide is more than 1 amp but less than 1.5 amps; and when the power supply capability assessment device 100 generates a fourth power supply capability index Index_4, it means that the current that the power supply can provide is more than 1.5 amps.

[0052] Based on the above configuration, the power capability determination device 100 of the first embodiment of the present invention can be used to determine the power capability of a USB power supply, and to inform the electronic device 200 of the power capability of the power supply 210 used by the electronic device 200 by outputting different power capability indices PWR_IDX. The electronic device 200 then activates different functions based on the power capability indices PWR_IDX. For example, different functions will have different power consumption. Figure 1The electronic device 200 is a signal processing device used to process a video / audio signal. When the power capability index PWR_IDX received by the signal processing circuit 204 of the electronic device 200 is a damaged power capability index Index_0 or a first power capability index Index_1, the electronic device 200 does not perform image processing; when the power capability index PWR_IDX received by the signal processing circuit 204 is a second power capability index Index_2, the electronic device 200 only performs screen scaling on the input signal; when the power capability index PWR_IDX received by the signal processing circuit 204 is a second power capability index Index_2, the electronic device 200 only performs screen scaling on the input signal; when the power capability index PWR_IDX received by the signal processing circuit 204 is a third power capability index Index_1, the electronic device 200 performs image scaling on the input signal. When the power capability index PWR_IDX is the third power capability index, Index_3, the electronic device 200 performs image scaling and preset image processing (such as adjusting image sharpness and increasing resolution) on the input signal. When the power capability index PWR_IDX received by the signal processing circuit 204 is the fourth power capability index, Index_4, the electronic device 200 performs image scaling, scene detection, and calls the corresponding image processing settings on the input signal, and performs image processing. Generally speaking, the power capability index PWR_IDX indicates that the higher the current that the power supply can provide, the more or more complex image processing the electronic device 200 can perform on the input signal. It should be noted that the operation examples corresponding to the different values ​​of the power capability index PWR_IDX are for illustrative purposes only and are not intended to limit the invention.

[0053] The power capability determination device 300 of the second embodiment of the present invention is used to determine the power capability of the HDMI interface power supply. Please refer to... Figure 3 , Figure 3 This is a block diagram of a power capability determination device 300 according to a second embodiment of the present invention. Figure 1 The power capability determination device 100 shown can be implemented by replacing it with a power capability determination device 300. For example... Figure 3As shown, the power capability determination device 300 of the second embodiment of the present invention includes a connector 302, a voltage monitoring circuit 304, a switching circuit 310, a load circuit 320, and a processing circuit 306. The load circuit 320 includes multiple different loads (e.g., a first load 321 and a second load 322), and the switching circuit 310 includes multiple switches electrically connected to the multiple different loads in the load circuit 320. For example, the switching circuit 310 includes a first switch 311 and a second switch 312, which are electrically connected to the first load 321 and the second load 322, respectively. The difference between the power capability determination device 300 of the second embodiment and the power capability determination device 100 of the first embodiment is that the connector 302 is an HDMI power connector, and the switching circuit 310 and the load circuit 320 each include two switches and two loads. Similarly, if the power interface connector 208 of the electronic device 200 is an HDMI interface, then the connector 302 and the power interface connector 208 can be combined into a single HDMI power connector. Similarly, when connector 302 receives an HDMI power supply and outputs an input voltage, voltage monitoring circuit 304 monitors and detects the input voltage and generates a monitoring voltage value V_IN1. Processing circuit 306 determines whether the monitoring voltage value V_IN1 is greater than a threshold V_TH1. Initially, both the first switch 321 and the second switch 322 remain switched off. If the monitoring voltage value V_IN1 (i.e., the input voltage) is not greater than the threshold V_TH1, processing circuit 306 generates a faulty power supply capability index Index_0 (i.e., PWR_IDX = Index_0) to indicate the power supply capability (i.e., power failure) of the HDMI power supply.If the monitored voltage value V_IN1 (i.e., the input voltage) is greater than the threshold V_TH1, the processing circuit 306 opens the first switch 311 to electrically connect the power output terminal N_PWR1 of the connector 302 to the first load 321 (at this time, the second switch 322 remains closed), and determines the monitored voltage value V_IN1. If the monitored voltage value V_IN1 is not greater than the threshold V_TH1, the processing circuit 306 generates a first power capability index Index_1 (i.e., PWR_IDX = Index_1); if the monitored voltage value V_IN1 is greater than the threshold V_TH1, the processing circuit 306 processes... The processing circuit 306 closes the first switch 311 and opens the second switch 312 to electrically connect the power output terminal N_PWR1 to the second load 322, and determines the current monitoring voltage value V_IN1. If the current monitoring voltage value V_IN1 is not greater than the threshold V_TH1, the processing circuit 306 generates a second power capability index Index_2 (i.e., PWR_IDX = Index_2); if the current monitoring voltage value V_IN1 is greater than the threshold V_TH1, the processing circuit 306 generates a third power capability index Index_3 (i.e., PWR_IDX = Index_3). It is worth noting that the first load 321 and the second load 322 can be set with their load values ​​as needed. For example, the first load 321 can be set as a load to detect whether the power supply can provide 0.05 amps of current, and the second load 322 can be set as a load to detect whether the power supply can provide 0.3 amps of current, but the present invention is not limited thereto.

[0054] Please refer to Figure 4 , Figure 4 This is a flowchart 400 of a power capability determination method according to an embodiment of the present invention. Where the final results are substantially the same, it is not necessary to completely follow... Figure 4 These steps are performed in the order shown. The method of the present invention includes the following steps:

[0055] Step S402: Receive a power source to output an input voltage;

[0056] Step S404: Monitor the input voltage to generate a monitoring voltage value;

[0057] Step S406: Is the monitored voltage value greater than a threshold? If not, proceed to step S408; if yes, proceed to step S410.

[0058] Step S408: Generate a damaged power supply capability index;

[0059] Step S410: Open a first switch to connect the input voltage to a first load;

[0060] Step S412: Is the monitored voltage value greater than the threshold? If not, proceed to step S414; if yes, proceed to step S416.

[0061] Step S414: Generate a first power capability index;

[0062] Step S416: Close the first switch and open a second switch to connect the input voltage to a second load;

[0063] Step S418: Is the monitored voltage value greater than the threshold? If not, proceed to step S420; if yes, proceed to step S422.

[0064] Step S420: Generate a second power capability index;

[0065] Step S422: Close the second switch and open a third switch to make the input voltage conduct to a third load;

[0066] Step S424: Is the monitored voltage value greater than the threshold? If not, proceed to step S426; if yes, proceed to step S428.

[0067] Step S426: Generate a third power capability index; and

[0068] Step S428: Generate a fourth power capability index.

[0069] It should be noted that the flowchart 400 of the power capability judgment method is based on the example of three loads in the power capability judgment device 100 of the first embodiment of the present invention. However, the present invention is not limited to this. Specifically, the number of loads in the load circuit can be changed according to needs. For example, if there is only one first load and one second load in the load circuit, step S418 should be modified to: whether the monitored voltage value is greater than the threshold; if not, the process proceeds to step S420; if yes, the process proceeds to step S426, and the processing ends after the second / third power capability index is generated.

[0070] The power capability determination device 100 / 300 of this invention can be applied to audio-visual devices, such as a connection device (dongle) or an adapter cable that transmits audio-visual signals from a player to a display. For example, please refer to... Figure 5 and Figure 6 , Figure 5 This is a block diagram of a power capability determination device 100 according to an embodiment of the present invention applied to a playback system having a connection device 500. Figure 6 For example Figure 5 A schematic diagram of the connecting device product is shown. (See attached diagram.) Figure 5As shown, the power capability determination device 100 is implemented in the connection device 500. One end of the connection device 500 (e.g., an HDMI connector 512) is coupled to the display 506, for example, by connecting to or inserting an HDMI plug into a port of the display 506 using an HDMI connector. The other end of the connection device 500 (e.g., a USB connector 510) is coupled to a USB cable 502, and then coupled to the player 504 via the USB cable 502. In this embodiment, the input signal is transmitted to the signal processing circuit 204 via the USB connector 510, and power is transmitted to the signal processing circuit 204 and the power capability determination device 100 via the USB connector 510. After receiving the USB power, the power capability determination device 100 generates and transmits a power capability index to the signal processing circuit 204 based on the USB power. The signal processing circuit 204 then performs corresponding operations based on the power capability index. Figure 6 As shown, the connecting device 500 can be implemented according to this product structure. It should be noted that... Figure 5 and Figure 6 Only one of the many embodiments of the present invention is shown. Therefore, a playback system having the connection device 500 is not limited to... Figure 5 and Figure 6 The embodiment shown. For example, the connection device 500 may also be designed as a device that is inserted into or coupled to the player, that is, one end of the connection device 500 is coupled to the player 504, and the other end is coupled to the display 506 via a cable or transmission line.

[0071] For example, please refer to the following: Figure 7 and Figure 8 , Figure 7 This is a block diagram of a power capability determination device 100 according to an embodiment of the present invention applied to a playback system having an adapter cable 700. Figure 8 For example Figure 7 A schematic diagram of the adapter cable product is shown. Figure 7As shown, the power capability determination device 100 is implemented in the adapter cable 700. One end of the adapter cable 700 (e.g., HDMI connector 730) is coupled to the display 750, for example, by connecting to or plugging into a port of the display 750 using a connector. The other end of the adapter cable 700 is coupled to the player 760, for example, by connecting to or plugging into a port of the player 760 using a connector. In this implementation, the signal transmission device including the signal processing device is a signal transmission component configured on a signal transmission path between the player and the display. The input signal is transmitted to the signal processing circuit 204 via the USB cable 740, and power is transmitted to the signal processing circuit 204 and the power capability determination device 100 via the USB connector 740. After receiving the USB power, the power capability determination device 100 generates and transmits a power capability index to the signal processing circuit 204 based on the USB power, and the signal processing circuit 204 performs corresponding operations based on the power capability index. Figure 8 As shown, the adapter cable 700 can be implemented according to this product structure, and the power capability determination device 100 can be installed in the larger connector at either end of the adapter cable 700. It should be noted that... Figure 7 and Figure 8 Only one of the many embodiments of the present invention is shown. Therefore, a playback system having the adapter cable 700 is not limited to... Figure 7 and Figure 8 The implementation method shown.

[0072] One advantage of this invention is that it can quickly determine the power supply capability of a power source and generate a power supply capability index based on different loads. This allows an electronic device equipped with the power supply capability determination device of this invention to determine whether it can start based on the power supply capability index, or further perform different operations based on different power supply capability indices. Compared with related technologies, the power supply capability determination device of this invention can achieve power supply capability determination and device operation with no or low side effects.

[0073] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made in accordance with the claims of the present invention should fall within the scope of the present invention.

Claims

1. A power supply capability determination device for determining the power supply capability of a power source, characterized in that, The power capability determination device includes: A connector for receiving the power supply to output an input voltage at a power output terminal; A load circuit includes at least a first load and a second load different from the first load; A switching circuit is electrically connected between the load circuit and the power output terminal, wherein the switching circuit includes a first switch and a second switch, the first switch being electrically connected between the first load and the power output terminal, and the second switch being electrically connected between the second load and the power output terminal. A voltage monitoring circuit is electrically connected to the power supply output terminal and is used to monitor the input voltage to generate a monitoring voltage value. as well as A processing circuit, electrically connected to the voltage monitoring circuit and the switching circuit, is used to control the switching circuit, and under the control of the processing circuit, to receive the monitored voltage value and determine the power supply capability of the power source based on the monitored voltage value. as well as In response to the processing circuit opening the first switch, electrically connecting the power output terminal to the first load, and when determining that the monitored voltage value is not greater than a threshold, the processing circuit generates a power capability index to indicate the power capability of the power supply. as well as In response to the processing circuit opening the second switch to electrically connect the power output terminal to the second load, and determining that the monitored voltage value is greater than the threshold, the processing circuit closes the second switch and opens the first switch.

2. The power supply capability determination device as described in claim 1, characterized in that, The connector is either a Universal Serial Bus (USB) connector or a High Definition Multimedia Interface (HDMI) connector.

3. The power supply capability determination device as described in claim 1, characterized in that, In response to the processing circuit closing the switching circuit, so that the power output terminal is not electrically connected to the load circuit, and determining that the monitored voltage value is greater than the threshold, the processing circuit opens the first switch.

4. The power supply capability determination device as described in claim 1, characterized in that, In response to the processing circuit shutting down the switching circuit, causing the power output terminal to be disconnected from the load circuit, and determining that the monitored voltage value is not greater than the threshold, the processing circuit generates a damaged power capability index to indicate the power capability of the power supply.

5. The power supply capability determination device as described in claim 1, characterized in that, The threshold is 4.75 volts.

6. An electronic device comprising a power capability determination device according to any one of claims 1-5, wherein the electronic device is further configured to process an input signal and set a processing mode for the input signal based on the power capability of the power source.

7. A method for determining power supply capability, used to determine the power supply capability of a power source, characterized in that, The power supply capability determination method includes: Receive the power supply to output an input voltage at a power output terminal; Monitor the input voltage to generate a monitoring voltage value; A switching circuit is electrically connected between the power output terminal and a load circuit, wherein the load circuit includes at least one first load and a second load different from the first load, and the switching circuit includes a first switch and a second switch, wherein the first switch is electrically connected between the first load and the power output terminal, and the second switch is electrically connected between the second load and the power output terminal. Control the switching circuit; as well as Under the control of the switching circuit, the monitored voltage value is received, and the power supply capability of the power source is determined based on the monitored voltage value. The method further includes: in response to opening the first switch, electrically connecting the power output terminal to the first load, and when determining that the monitored voltage value is not greater than a threshold, generating a power capability index to indicate the power capability of the power supply; and In response to turning on the second switch to electrically connect the power output terminal to the second load, and determining that the monitored voltage value is greater than the threshold, the second switch is turned off and the first switch is turned on.

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