Control system and hub

Abstract

A control system and a hub. The control system is applied to the hub in which a power supply module is provided. The control system comprises: a temperature sensing unit for providing sensing data that reflects the temperature of the power supply module; and a control unit for acquiring the sensing data from the temperature sensing unit and outputting a control instruction when the sensing data meets a preset condition, so as to reduce the output power of the hub, wherein the sensing data meeting the preset condition indicates that the temperature of the power supply module is greater than a preset temperature threshold value. The control system improves the safety and reliability of the hub, such that the maximum output power of the power supply module provided in the hub does not need to be equal to the sum of the power consumed by the hub itself and the maximum output powers of all ports of the hub, but is lower than the sum, thus reducing the size and manufacturing costs of the hub.

Description

A control system and a hub

[0001] Priority information and cross-references

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on November 28, 2023, with application number 2023232243139 and invention name “A Control System and Hub”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of hubs, and in particular to a control system and a hub. Background Art

[0004] Hubs offer functions such as interface expansion, multi-device group control, and data transmission, and are widely used in scenarios requiring the connection of multiple electronic devices. Hubs with built-in power modules can power connected devices. In existing hubs with built-in power modules, the output power of the power module is typically equal to the sum of the hub's own power consumption and the maximum output power of all the hub's ports. This requires a higher-power power module, which, due to temperature rise limitations, is often larger. However, in actual applications, a hub typically does not require all ports to operate at full capacity simultaneously, resulting in a larger hub with lower power utilization.

[0005] Public content

[0006] The present application provides a control system, which is applied to a hub with a built-in power module, including: a temperature sensing unit, which is used to provide sensing data reflecting the temperature of the power module; a control unit, which is used to obtain the sensing data from the temperature sensing unit and output a control instruction when the sensing data meets a preset condition to reduce the output power of the hub, wherein the sensing data meeting the preset condition indicates that the temperature of the power module is greater than a preset temperature threshold.

[0007] The present application also provides a hub, which has a built-in power module and includes the above-mentioned control system and multiple interfaces, wherein the interfaces are used to connect external devices, and the control system is used to control the power supply of the power module to the external devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The above and other purposes, features, and advantages of the present application will become more apparent through a more detailed description of the embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are intended to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0009] FIG1 shows a schematic block diagram of a control system according to an embodiment of the present application.

[0010] FIG2 shows a circuit diagram of a control system according to an embodiment of the present application.

[0011] FIG3 shows a schematic block diagram of a hub control system applied to a built-in power module according to an embodiment of the present application. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of the present application more apparent, example embodiments according to the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments of the present application described in this application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this application.

[0013] The present application proposes a control system applied to a hub with a built-in power module. As shown in Figure 1, the control system 100 includes: a temperature sensing unit 101, which is used to provide sensing data reflecting the temperature of the power module; a control unit 102, which is used to obtain sensing data from the temperature sensing unit and output a control instruction when the sensing data meets a preset condition to reduce the output power of the hub, wherein the sensing data meeting the preset condition indicates that the temperature of the power module is greater than a preset temperature threshold.

[0014] The power module built into the hub of the present application is used to supply power to the hub and the electronic devices connected to the hub. The hub of the present application has multiple ports for connecting multiple devices, and the total power of the hub depends on the hub's own power and the hub's output power for supplying power to the multiple devices connected to the hub. The present application involves the temperature rise limit of the power module, and the temperature rise refers to the temperature of each component in the electronic device above the ambient temperature. When current flows through the conductor in the electronic device, a thermal effect of the current is generated. As time goes by, the temperature of the conductor surface continues to rise until it stabilizes. Excessively high temperatures inside the device will affect product performance and may even lead to a decrease in insulation level or increase product instability.

[0015] The control system of the present application is applied to a hub with a built-in power module, which provides sensing data reflecting the temperature of the power module through the temperature sensing unit 101, and obtains the sensing data from the temperature sensing unit 101 through the control unit 102, and outputs a control instruction when the sensing data meets the preset conditions to reduce the output power of the hub (wherein the sensing data meeting the preset conditions indicates that the temperature of the power module is greater than the preset temperature threshold), thereby controlling the temperature of the power module, improving the safety and reliability of the hub, and making the maximum output power of the built-in power module of the hub not need to be equal to the sum of the power consumed by the hub itself and the maximum output power of all ports of the hub, but is lower than the sum, thereby reducing the volume and manufacturing cost of the hub.

[0016] Exemplarily, the sensed data includes a temperature value; the temperature sensing unit 101 includes a temperature sensor that directly outputs a temperature value; the control unit 102 includes a microcontroller or a chip; the sensed data meeting a preset condition means that the temperature value is greater than a preset temperature threshold.

[0017] In an example, the control unit 102 obtains the temperature value of the power module from the temperature sensor of the temperature sensing unit 101. When the temperature value is greater than a preset temperature threshold, the control unit 102 outputs a control instruction to reduce the output power of the hub.

[0018] Exemplarily, the preset temperature threshold includes at least one temperature threshold; when the preset temperature threshold includes two or more temperature thresholds, different temperature thresholds correspond to different control instructions to reduce the output power to different degrees.

[0019] In one example, the preset temperature threshold includes two or more temperature thresholds. The control unit 102 obtains sensing data from the temperature sensing unit 101, determines the size relationship between the temperature and multiple temperature thresholds based on the sensing data, and outputs different judgment instructions based on different judgment results.

[0020] For example, when the preset temperature thresholds include two temperature thresholds, with the first temperature threshold being greater than the second temperature threshold, the control unit 102 obtains sensing data from the temperature sensing unit 101 and, based on the sensing data, determines that the temperature value is greater than the first temperature threshold, then issues a first judgment instruction to reduce the hub's output power to a first output power. If the control unit 102 determines, based on the sensing data, that the temperature value is greater than the second temperature threshold but less than or equal to the first temperature threshold, then it issues a second judgment instruction to reduce the hub's output power to a second output power. The first output power is greater than the second output power. This is because a sensed temperature value greater than the first temperature threshold indicates that the current temperature is too high, requiring a significant reduction in output power for temperature control to improve device safety. A sensed temperature value less than the first temperature threshold but greater than the second temperature threshold indicates that the current temperature is not particularly high, requiring a smaller reduction in output power for temperature control to improve device safety. If the control unit 102 determines, based on the sensing data, that the temperature value is less than or equal to the second temperature threshold, then no control instruction is required. In one example, the control unit 102 is a programmed microcontroller. The control unit 102 obtains sensing data from the temperature sensing unit 101, determines the relationship between the temperature value and multiple temperature thresholds based on the sensing data based on the logic pre-written in the control unit 102, and outputs different control instructions based on the judgment results. The control unit 102 reduces the output power of the hub based on these control instructions.

[0021] Exemplarily, the sensed data includes a resistance value; the temperature sensing unit 101 includes a positive temperature coefficient thermistor or a negative temperature coefficient thermistor that outputs a resistance value; the control unit 102 includes a microcontroller or a chip; the sensed data meets the preset conditions, which means that: the resistance value of the positive temperature coefficient thermistor is greater than the first resistance threshold, or the resistance value of the negative temperature coefficient thermistor is less than the second resistance threshold.

[0022] In an example, the control unit 102 obtains the resistance value of the positive temperature coefficient thermistor from the temperature sensing unit 101. When the resistance value of the positive temperature coefficient thermistor is greater than a first resistance threshold, the control unit 102 outputs a control instruction to reduce the output power of the hub.

[0023] In another example, the control unit 102 obtains the resistance value of the negative temperature coefficient thermistor from the temperature sensing unit 101. When the resistance value of the negative temperature coefficient thermistor is less than a second resistance threshold, the control unit 102 outputs a control instruction to reduce the output power of the hub.

[0024] Exemplarily, the sensed data includes a voltage value; the temperature sensing unit 101 includes a thermistor and a voltage divider resistor, and the thermistor includes a positive temperature coefficient thermistor or a negative temperature coefficient thermistor; the control unit 102 includes a comparator, and either a microcontroller or a chip; the sensed data meets the preset conditions if: the voltage value across the positive temperature coefficient thermistor is greater than the voltage value across the voltage divider resistor, or the voltage value across the negative temperature coefficient thermistor is less than the voltage value across the voltage divider resistor.

[0025] In one example, in the temperature sensing unit 101, a positive temperature coefficient thermistor and a voltage divider resistor are connected to a power supply to form a voltage divider branch. The voltage value across the positive temperature coefficient thermistor is used as the sensing data input to the positive input terminal of the comparator, and the voltage across the voltage divider resistor is used as the reference voltage input to the negative input terminal of the comparator. When the voltage value across the positive temperature coefficient thermistor is not greater than the voltage value across the voltage divider resistor, the comparator determines that the sensing data does not meet the preset conditions and outputs a first specific instruction (e.g., a high level). At this time, the microcontroller does not output a control instruction to reduce the output power of the hub. When the voltage value across the positive temperature coefficient thermistor is greater than the voltage value across the voltage divider resistor, the comparator determines that the sensing data meets the preset conditions and outputs a second specific instruction (e.g., a low level), causing the microcontroller to output a control instruction to reduce the output power of the hub.

[0026] In one example, in the temperature sensing unit 101, a negative temperature coefficient thermistor and a voltage divider resistor are connected to a power supply to form a voltage divider branch. The voltage value across the negative temperature coefficient thermistor is used as the sensing data input to the positive input terminal of the comparator, and the voltage across the voltage divider resistor is used as the reference voltage input to the negative input terminal of the comparator. When the voltage value across the negative temperature coefficient thermistor is not less than the voltage value across the voltage divider resistor, the comparator determines that the sensing data does not meet the preset conditions and outputs a first specific instruction (e.g., a high level). At this time, the microcontroller does not output a control instruction to reduce the output power of the hub. When the voltage value across the negative temperature coefficient thermistor is less than the voltage value across the voltage divider resistor, the comparator determines that the sensing data meets the preset conditions and outputs a second specific instruction (e.g., a low level), causing the microcontroller to output a control instruction to reduce the output power of the hub.

[0027] The following describes an embodiment of the present application of a hub control system with a built-in power module in conjunction with FIG2 , which is an exemplary specific implementation of the control system shown in FIG1 .

[0028] As shown in FIG2 , the control system includes a temperature sensing unit and a control unit. The control unit includes a comparator 201 and a chip 202. The temperature sensing unit includes a voltage divider resistor, including a first resistor R1, a second resistor R2, and a third resistor R3, and a negative temperature coefficient thermistor RT1. The first end of the first resistor R1 is connected to a power supply, the second end of the first resistor R1 is connected to the first end of the thermistor RT1, and the second end of the thermistor RT1 is grounded; the first end of the second resistor R2 is connected to the first end of the first resistor R1, the second end of the second resistor R2 is connected to the first end of the third resistor R3, and the second end of the third resistor R3 is grounded; the first input end of the comparator 201 is connected to the first end of the thermistor RT1, the second input end of the comparator 201 is connected to the first end of the thermistor R3, and the output end of the comparator 201 is connected to the input end of the chip 202.

[0029] The following describes the working process of a hub control system with a built-in power module according to an embodiment of the present application in conjunction with Figure 2. The thermistor RT1 is used to provide sensing data reflecting the temperature of the power module. When the temperature of the power module rises, the resistance of the thermistor RT1 decreases as the temperature rises. In an example, the power supply VCC voltage in Figure 2 is 5V, the first resistor R1 and the second resistor R2 are both 100KΩ, the resistance of the third resistor R3 is 12KΩ, the preset temperature threshold is 80°C, the thermistor RT1 is 100KΩ / 25°C, that is, the zero-power resistance value of RT1 measured at an ambient temperature of 25°C is 100KΩ, and the value of point A is the voltage across RT1. The value of point B is the voltage across R3.

[0030] At a normal temperature of 25°C, the voltage across RT1 is 2.5V. When the temperature rises to 80°C, according to the data sheet of the negative temperature coefficient thermistor, the resistance value of RT1 decreases to approximately 12kΩ. The voltage at point A in FIG2 changes from 2.5V to 0.53V. Since the resistance value of R2 is 100kΩ and the resistance value of R3 is 20kΩ, the voltage value at point B, i.e., the voltage value across R3, is 0.53V. Therefore, when the temperature continues to rise to exceed 80°C, the resistance value of RT1 decreases, and the voltage at point A is less than 0.53V. The positive terminal voltage of comparator 201 is less than the negative terminal voltage, and comparator 201 outputs a low level. The input terminal C of chip 202 is also a low level, causing chip 202 to output a control instruction for reducing the output power of the hub (for example, chip 202 can be electrically connected to a control structure capable of controlling the output power of the hub, so that the control structure controls the hub to reduce the output power based on the control instruction). This reduces the power of the power module and lowers the temperature of the power module.

[0031] When the temperature is lower than 80°C, the resistance value of RT1 is greater than 12kΩ, the voltage across RT1 is greater than the voltage across R3, the voltage value at point A is greater than the voltage value at point B, the positive terminal voltage of comparator 201 is greater than the negative terminal voltage, comparator 201 outputs a high level, and the input terminal C of the chip is a high level, so that the chip does not output a control instruction for reducing the output power of the hub.

[0032] In one example, the resistance values ​​of the first resistor, the second resistor, and the third resistor can be set differently based on the preset temperature threshold and the parameters of the selected negative temperature coefficient thermistor. In the embodiment shown in FIG2 , when the preset temperature threshold needs to be adjusted, the reference resistance value corresponding to the new preset temperature threshold is queried from the data sheet of RT1, and then the resistance value of the third resistor R3 is set equal to the reference resistance value, so that when the temperature rises to the new preset temperature threshold, the resistance value of RT1 is equal to the reference resistance value, and the voltage across RT1 is equal to the voltage across R3. When the temperature continues to rise to a value greater than the new preset temperature threshold, the resistance value of RT1 is less than the reference resistance value, and the voltage across RT1 is less than the voltage across R3, so that the positive terminal voltage of comparator 201 is less than the negative terminal voltage, and comparator 201 outputs a low level. The input terminal C of the chip is low, causing the chip to reduce the output power of the hub, thereby reducing the power of the power module and lowering the temperature of the power module.

[0033] The following describes an embodiment of the present application in conjunction with Figure 3, which is an exemplary specific implementation of the control system shown in Figure 1. As shown in Figure 3, the control system includes a temperature sensing unit and a control unit. Among them, the temperature sensing unit includes a temperature sensor 301, and the control unit includes a microcontroller 302. The output end of the temperature sensor 301 is connected to the input end of the microcontroller 302. The microcontroller 302 obtains the temperature value of the power module from the temperature sensor 301. The microcontroller 302 is pre-set with judgment logic. When the temperature value is greater than the preset temperature threshold, the microcontroller 302 outputs a control instruction to reduce the output power of the hub, thereby reducing the power of the power module, so that the temperature of the power module is reduced.

[0034] In one example, the microcontroller 301 includes an analog-to-digital converter (ADC) circuit, and the output end of the temperature sensor 301 is connected to the input end of the ADC in the microcontroller 301. The microcontroller 301 obtains the temperature value after analog-to-digital conversion and compares the temperature value with a preset temperature threshold. When the temperature value is greater than the preset temperature threshold, the microcontroller 302 outputs a control instruction to reduce the output power of the hub, thereby reducing the power of the power module, so that the temperature of the power module is reduced.

[0035] Exemplarily, the control unit is a chip that supports the fast charging protocol.

[0036] In one example, the chip may be a chip that supports PD fast charging and / or a microprocessor with programming capabilities.

[0037] Exemplarily, the control unit outputs the control instruction to a module in the hub for performing power control.

[0038] Exemplarily, the module sends a message to at least one device in the device plugged into the hub through the configuration channel to negotiate with the device the power value to be reduced; or, the module directly reduces the power value output to the at least one device.

[0039] In one example, after receiving a control instruction, the power control module in the hub sends a message to the device to negotiate the power value to be reduced, and then reduces the hub's output power to these devices according to the negotiation results. For devices in the hub that cannot negotiate power, the power control module in the hub directly reduces the power output of the hub to at least one device. In one example, the power control module in the hub is a chip that supports the PD protocol. For devices in the hub that support the PD protocol, after receiving the control instruction, the chip sends a process data object (PDO) message to the power receiving end controller (Sink) through the PD protocol configuration channel to the device, and then reduces the hub's output power to these devices according to the negotiation results. For devices in the hub that cannot negotiate power, the chip directly shuts off the hub's output power to these devices. In one example, the module for power control in the hub is also provided with preset rules and / or a preset device list. For devices connected to the hub that comply with the preset rules and / or are included in the preset device list, when the output power of the hub is reduced, priority is given to ensuring that the output power of the hub to these devices is not affected.

[0040] According to another aspect of the present application, a hub is also provided, which has a built-in power module and includes the control system described above, and also includes multiple interfaces, the interfaces are used to connect external devices, and the control system is used to control the power supply of the external devices by the power module. In one example, the hub is provided with multiple interfaces, for example, a USB-A interface, a USB-C interface, an HDMI interface, a DP interface and / or an SD card interface, etc. In one example, the power module of the hub supplies power to the device inserted into the hub through the interface. The structure and specific operation of the control system have been described in detail above, and for the sake of brevity, they will not be repeated here.

[0041] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely illustrative and are not intended to limit the scope of the present application. Various changes and modifications may be made therein by those skilled in the art without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0042] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0043] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units described is merely a logical function division. In actual implementation, other division methods may be used, such as combining or integrating multiple units or components into another device, or ignoring or not performing some features.

[0044] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0045] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be interpreted as reflecting the following intention: that the application claimed for protection requires more features than the features explicitly recited in each claim. More precisely, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with features that are less than all the features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present application.

[0046] It will be understood by those skilled in the art that, except where mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or apparatus disclosed herein may be combined in any combination. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature providing the same, equivalent, or similar purpose.

[0047] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0048] It should be noted that the above embodiments illustrate rather than limit the present application, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim listing several on-board systems, several of these on-board systems may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0049] The above is merely a description of specific embodiments of the present application, and the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. The scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A control system, applied to a hub with a built-in power module, characterized in that: include: A temperature sensing unit, used to provide sensing data reflecting the temperature of the power module; A control unit is used to obtain the sensing data from the temperature sensing unit and output a control instruction to reduce the output power of the hub when the sensing data meets a preset condition, wherein the sensing data meeting the preset condition indicates that the temperature of the power module is greater than a preset temperature threshold.

2. The control system according to claim 1, characterized in that: The sensed data includes a temperature value; The temperature sensing unit includes a temperature sensor that directly outputs the temperature value; The control unit includes a microcontroller or a chip; The sensed data meeting the preset condition means that: the temperature value is greater than the preset temperature threshold.

3. The control system according to claim 1, characterized in that: The sensed data includes a resistance value; The temperature sensing unit includes a positive temperature coefficient thermistor or a negative temperature coefficient thermistor that outputs the resistance value; The control unit includes a microcontroller or a chip; The sensed data satisfies the preset condition when: the resistance value of the positive temperature coefficient thermistor is greater than a first resistance threshold, or the resistance value of the negative temperature coefficient thermistor is less than a second resistance threshold.

4. The control system according to claim 1, characterized in that: The sensed data includes a voltage value; The temperature sensing unit includes a thermistor and a voltage divider resistor, and the thermistor includes a positive temperature coefficient thermistor or a negative temperature coefficient thermistor; The control unit includes a comparator and any one of a microcontroller and a chip; The sensed data satisfies the preset condition when: the voltage value across the positive temperature coefficient thermistor is greater than the voltage value across the voltage divider resistor, or the negative temperature coefficient The voltage value across the thermistor is smaller than the voltage value across the voltage divider resistor.

5. The control system according to claim 4, characterized in that: The positive temperature coefficient thermistor and the voltage divider resistor are connected to the power module to form a voltage divider branch, the voltage value across the positive temperature coefficient thermistor is input as the sensing data to the positive input end of the comparator, and the voltage across the voltage divider resistor is input as a reference voltage to the negative input end of the comparator.

6. The control system according to claim 5, characterized in that: When the voltage value across the positive temperature coefficient thermistor is not greater than the voltage value across the voltage divider resistor, the comparator determines that the sensed data does not meet the preset condition and outputs a first specific instruction. Under the first specific instruction, the microcontroller does not output a control instruction to reduce the output power of the hub.

7. The control system according to claim 5, characterized in that: When the voltage across the positive temperature coefficient thermistor is greater than the voltage across the voltage divider resistor, the comparator determines that the sensed data meets the preset condition, and outputs a second specific instruction to cause the microcontroller to output a control instruction to reduce the output power of the hub.

8. The control system according to claim 4, characterized in that: The negative temperature coefficient thermistor and the voltage divider resistor are connected to the power module to form a voltage divider branch, the voltage value across the negative temperature coefficient thermistor is input as the sensing data to the positive input end of the comparator, and the voltage across the voltage divider resistor is input as a reference voltage to the negative input end of the comparator.

9. The control system according to claim 8, characterized in that: When the voltage value across the negative temperature coefficient thermistor is not less than the voltage value across the voltage divider resistor, the comparator determines that the sensed data does not meet the preset condition and outputs a first specific instruction. Under the first specific instruction, the microcontroller does not output a control instruction to reduce the output power of the hub.

10. The control system according to claim 8, characterized in that: When the voltage across the negative temperature coefficient thermistor is less than the voltage across the voltage divider resistor, the comparator determines that the sensed data meets the preset condition, and outputs a second specific instruction to enable the microcontroller to output a control instruction to reduce the output power of the hub.

11. The control system according to claim 4, characterized in that: The voltage-dividing resistors include a first resistor, a second resistor and a third resistor having the same resistance value, wherein: A first end of the first resistor is connected to a power supply, a second end of the first resistor is connected to a first end of the thermistor, and a second end of the thermistor is grounded; The first end of the second resistor is connected to the first end of the first resistor, the second end of the second resistor is connected to the first end of the third resistor, and the second end of the third resistor is grounded; The first input end of the comparator is connected to the first end of the thermistor, the second input end of the comparator is connected to the first end of the third resistor, and the output end of the comparator is connected to the input end of the control unit.

12. The control system according to claim 11, characterized in that: The resistance values ​​of the first resistor, the second resistor and the third resistor are set according to the preset temperature threshold and the parameters of the thermistor.

13. The control system according to any one of claims 1 to 12, characterized in that: The control unit is a chip that supports the fast charging protocol.

14. The control system according to any one of claims 1 to 12, characterized in that: The preset temperature threshold includes at least one temperature threshold; When the preset temperature threshold includes two or more temperature thresholds, different temperature thresholds correspond to different control instructions to reduce the output power to different degrees.

15. The control system according to claim 14, characterized in that: The preset temperature threshold includes a first temperature threshold and a second temperature threshold, the first temperature threshold is greater than the second temperature threshold, wherein: When the control unit determines based on the sensed data that the temperature value is greater than the first temperature threshold, the control unit outputs a first judgment instruction to reduce the output power of the hub to a first output power; When the control unit determines based on the perception data that the temperature value is greater than the second temperature threshold and less than or equal to the first temperature threshold, it outputs a second judgment instruction to reduce the output power of the hub to a second output power, wherein the first output power is greater than the second output power.

16. The control system according to claim 15, characterized in that: When the control unit determines based on the sensing data that the temperature value is less than or equal to the first When the temperature threshold is lower than the second temperature threshold, no control instruction for reducing the output power of the hub is output.

17. The control system according to any one of claims 1 to 12, characterized in that: The control unit outputs the control instruction to a module in the hub for performing power control.

18. The control system according to claim 17, characterized in that: The module sends a message to at least one device inserted into the hub through a configuration channel to negotiate with the device a power value to be reduced; or, the module directly reduces the power value output to the at least one device.

19. A hub, characterized in that: The hub has a built-in power module and includes the control system described in any one of claims 1-18, and also includes multiple interfaces, wherein the interfaces are used to connect external devices, and the control system is used to control the power supply of the power module to the external devices.

20. The hub according to claim 19, characterized in that The multiple interfaces include at least two interfaces among a USB-A interface, a USB-C interface, an HDMI interface, a DP interface, and an SD card interface.

Images