Temperature management circuit, control method and terminal device

Abstract

The application discloses a temperature management circuit, a control method and a terminal device. The terminal device comprises a control unit and at least one radio frequency front-end chip connected with the control unit. The temperature management circuit is connected with the control unit and comprises at least one temperature detection branch, at least one switching diode and a switching triode. When the temperature of any one of the radio frequency front-end chips is greater than or equal to a preset temperature threshold, the voltage of the switching triode is turned on through the switching diode, and the output end of the switching triode outputs a preset low level. When the output end of the switching triode outputs the preset low level, the control unit is triggered to enter a preset mode to send a control instruction to a corresponding radio frequency front-end chip, so that the corresponding radio frequency front-end chip reduces its transmission power, and temperature management is realized. The above scheme effectively and reliably solves the problem of heating of the terminal device in long-time use.

Description

Technical Field

[0001] This application relates to the field of radio frequency communication technology, and in particular to a temperature management circuit, control method and terminal device. Background Technology

[0002] With the development of communication technology, 5G communication involves much more interactive information than previous generations of communication technology. The power consumption of radio frequency front-end chips or modules (FEMs) is greater than that of previous generations of communication. Therefore, 5G terminals generally experience overheating after prolonged use, which seriously affects the user experience. Summary of the Invention

[0003] According to embodiments of this application, this application provides at least one temperature management circuit, control method, and terminal device to solve the above-mentioned problems.

[0004] This application provides a temperature management circuit for use in a terminal device. The terminal device includes a control unit and at least one radio frequency (RF) front-end chip connected to the control unit. The temperature management circuit, connected to the control unit, includes: at least one temperature detection branch, wherein each temperature detection branch is located close to one of the at least one RF front-end chips and is used to detect the temperature of the at least one RF front-end chip; at least one switching diode, wherein the anode of each switching diode is connected to one of the at least one temperature detection branch; and a switching transistor, with its control terminal connected to the cathode of the at least one switching diode, its output terminal connected to the control unit, and its input terminal grounded. In response to the temperature of any one of the at least one RF front-end chips being greater than or equal to a preset temperature threshold, the switching transistor is turned on by the voltage of the at least one switching diode, thereby outputting a preset low level at the output terminal of the switching transistor. In response to detecting the preset low level output at the output terminal of the switching transistor, the control unit is triggered to enter a preset mode to send control commands to the corresponding RF front-end chip, thereby causing the corresponding RF front-end chip to reduce its transmission power and achieve temperature management.

[0005] In some embodiments, in response to detecting that the output terminal of the switching transistor outputs the preset low level, the control unit further detects the output terminal of the switching transistor after a preset time interval. Specifically, in response to detecting that the output terminal of the switching transistor outputs the preset high level, the control unit is triggered to enter a non-preset mode to send control commands to the corresponding RF front-end chip among the at least one RF front-end chips, thereby enabling the corresponding RF front-end chip to restore its transmit power. In response to detecting that the output terminal of the switching transistor does not output the preset high level, the control unit continues to maintain the preset mode.

[0006] In some embodiments, each of the at least one temperature detection branch includes a protective resistor and a thermistor connected in series, one end of which is connected to a first preset voltage and the other end is grounded. The protective resistor and the thermistor are connected to the positive terminal of the corresponding switching diode in the at least one switching diode.

[0007] In some embodiments, the temperature management circuit further includes a first resistor and a second resistor, wherein the control terminal of the switching transistor is grounded through the second resistor, and the output terminal of the switching transistor is connected to a second preset voltage through the first resistor.

[0008] In some embodiments, the at least one radio frequency front-end chip includes a first radio frequency front-end chip, a second radio frequency front-end chip, and a third radio frequency front-end chip; the at least one temperature detection branch includes a first temperature detection branch, a second temperature detection branch, and a third temperature detection branch; the at least one switching diode includes a first switching diode, a second switching diode, and a third switching diode; wherein, the first temperature detection branch is disposed close to the first radio frequency front-end chip, is used to detect the temperature of the first radio frequency front-end chip, and is connected to the control terminal of the switching transistor through the first switching diode; the second temperature detection branch is disposed close to the second radio frequency front-end chip, is used to detect the temperature of the second radio frequency front-end chip, and is connected to the control terminal of the switching transistor through the second switching diode; the third temperature detection branch is disposed close to the third radio frequency front-end chip, is used to detect the temperature of the third radio frequency front-end chip, and is connected to the control terminal of the switching transistor through the third switching diode.

[0009] In some embodiments, the first temperature detection branch includes a first protective resistor and a first thermistor connected in series, one end of which is connected to a third preset voltage and the other end is grounded. The first protective resistor and the first thermistor are connected to the positive terminal of the first switching diode. The second temperature detection branch includes a second protective resistor and a second thermistor connected in series, one end of which is connected to the third preset voltage and the other end is grounded. The second protective resistor and the second thermistor are connected to the positive terminal of the second switching diode. The third temperature detection branch includes a third protective resistor and a third thermistor connected in series, one end of which is connected to the third preset voltage and the other end is grounded. The third protective resistor and the third thermistor are connected to the positive terminal of the third switching diode. The negative temperature coefficients of the first thermistor, the second thermistor, and the third thermistor are different from each other.

[0010] A second aspect of this application provides a control method applied to a terminal device, the terminal device including a control unit, at least one radio frequency front-end chip connected to the control unit, and a temperature management circuit as described in any one of the first aspects above connected to the control unit. The method includes: in response to the temperature of the at least one radio frequency front-end chip being greater than or equal to a preset temperature threshold, the control circuit detecting that the temperature management circuit outputs a preset low level; in response to detecting the preset low level output by the temperature management circuit, the control unit is triggered to enter a preset mode to send a control command to the corresponding radio frequency front-end chip among the at least one radio frequency front-end chip, thereby causing the corresponding radio frequency front-end chip to reduce its transmission power and achieve temperature management.

[0011] In some embodiments, in response to the temperature of all at least one radio frequency front-end chip being less than the preset temperature threshold, the control circuit detects that the temperature management circuit outputs a preset high level; in response to the detection that the temperature management circuit outputs a preset high level, the control unit is triggered to enter a non-preset mode to send control commands to the corresponding radio frequency front-end chip among the at least one radio frequency front-end chip, thereby enabling the corresponding radio frequency front-end chip to restore its transmission power.

[0012] In some embodiments, in response to detecting that the temperature management circuit outputs the preset low level, the control unit further detects the output of the temperature management circuit after a preset time interval and / or alerts the user of the terminal device; in response to detecting that the temperature management circuit outputs the preset high level, the control unit is triggered to enter a non-preset mode to send control commands to the corresponding RF front-end chip in the at least one RF front-end chip, thereby enabling the corresponding RF front-end chip to restore its transmit power; in response to detecting that the temperature management circuit does not output the preset high level, the control unit continues to maintain the preset mode.

[0013] A third aspect of this application provides a terminal device, including a control unit, at least one radio frequency front-end chip connected to the control unit, and a temperature management circuit as described in the first aspect above, connected to the control unit.

[0014] In the above solution, the terminal device includes a control unit and at least one radio frequency (RF) front-end chip connected to the control unit. The temperature management circuit is connected to the control unit and includes: at least one temperature detection branch, wherein each temperature detection branch is located close to one of the at least one RF front-end chips for detecting the temperature of the at least one RF front-end chip; at least one switching diode, wherein the anode of each switching diode is connected to one of the at least one temperature detection branch; and a switching transistor, with its control terminal connected to the cathode of the at least one switching diode, its output terminal connected to the control unit, and its input terminal grounded. In response to the temperature of any one of the at least one RF front-end chips being greater than or equal to a preset temperature threshold, the switching transistor is turned on by the voltage of the at least one switching diode, thereby outputting a preset low level at the output terminal of the switching transistor. In response to detecting the preset low level output by the switching transistor, the control unit is triggered to enter a preset mode to send control commands to the corresponding RF front-end chip, thereby causing the corresponding RF front-end chip to reduce its transmission power, achieving temperature management, and effectively and reliably solving the problem of overheating of the terminal device after prolonged use.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the technical solutions of this application.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the terminal device of this application;

[0018] Figure 2 This is a schematic diagram of the structure of an embodiment of the temperature management circuit of this application;

[0019] Figure 3 This is a partial circuit diagram of the temperature management circuit according to an embodiment of this application;

[0020] Figure 4 This is a partial circuit diagram of the temperature management circuit according to an embodiment of this application;

[0021] Figure 5 This is a partial circuit diagram of the temperature management circuit according to an embodiment of this application;

[0022] Figure 6 This is a circuit diagram of an embodiment of the temperature management circuit of this application;

[0023] Figure 7 This is a flowchart illustrating an embodiment of the control method of this application;

[0024] Figure 8 This is a schematic diagram of another embodiment of the terminal device of this application. Detailed Implementation

[0025] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0026] In the following description, specific details such as particular system architectures, interfaces, and technologies are presented for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of this application.

[0027] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship. Furthermore, "many" in this document means two or more. Moreover, the term "at least one" in this document means any combination of at least two of any one or more of a plurality of objects. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0028] To facilitate understanding of this application, the terminal device of the embodiments of this application will be described first. Please refer to... Figure 1 , Figure 1 This is a schematic diagram of the structure of a terminal device 10 according to an embodiment of the present application. The terminal device 10 includes a control unit 101 and at least one radio frequency front-end chip 102 connected to the control unit 101.

[0029] The radio frequency (RF) front-end chip 102 includes at least an RF antenna, an RF switch, a power amplifier, a low-noise amplifier, a filter, and a duplexer. This application does not describe its internal circuitry in detail. The RF front-end chip 102 can be an RF front-end chip that transmits and receives 2G / 3G signals, 4G / 5G signals, and / or 5G NR signals; that is, the RF front-end chip 102 can be a 2G / 3G RF front-end chip, a 4G / 5G RF front-end chip, a 5G NR RF front-end chip, etc.

[0030] Please see Figure 2 , Figure 2This is a schematic diagram of one embodiment of the temperature management circuit 20 of this application. The temperature management circuit 20 is applied to a terminal device, such as the terminal device 10 of the above embodiment, and is connected to the control unit 101 of the terminal device 10. The temperature management circuit 20 includes at least one temperature detection branch 201, at least one switching diode 202, and a switching transistor 203.

[0031] At least one temperature detection branch 201, wherein each temperature detection branch 201 is located close to one of the radio frequency front-end chips in at least one radio frequency front-end chip 102, for detecting the temperature of at least one radio frequency front-end chip 102.

[0032] For example, each temperature detection branch 201 is located near the above. Figure 1 One of the radio frequency front-end chips 102 is configured such that at least one temperature detection branch 201 is used to detect the temperature of at least one radio frequency front-end chip 102.

[0033] At least one switching diode 202, wherein the positive terminal of each switching diode 202 is connected to one of the temperature sensing branches in at least one temperature sensing branch 201.

[0034] The control terminal 2033 of the switching transistor 203 is connected to the negative terminal of at least one switching diode 202, the output terminal 2031 is connected to the control unit 101, and the input terminal 2032 is grounded.

[0035] The switching transistor 203 can be an NPN transistor, but is not limited to NPN transistors, and is not restricted here.

[0036] In response to the temperature of any one of the radio frequency front-end chips 102 being detected by the temperature detection branch 201 as being greater than or equal to a preset temperature threshold, the switching transistor 203 is turned on by the voltage of at least one switching diode 202, thereby outputting a preset low level at the output terminal 2031 of the switching transistor 203.

[0037] In response to the detection that the output terminal 2031 of the switching transistor 203 outputs a preset low level, the control unit 101 is triggered to enter a preset mode to send control commands to the corresponding RF front-end chip in at least one RF front-end chip 102, thereby causing the corresponding RF front-end chip to reduce its transmission power and achieve temperature management.

[0038] In this embodiment, the temperature of the RF front-end chip is detected by the temperature detection branch 201. In response to the temperature of any one of the at least one RF front-end chip 102 being detected by the temperature detection branch 201 to be greater than or equal to a preset temperature threshold, the switching transistor 203 is turned on by the voltage of at least one switching diode 202, thereby outputting a preset low level at the output terminal 2031 of the switching transistor 203. In response to the detection of the preset low level output at the output terminal 2031 of the switching transistor 203, the control unit 101 is triggered to enter a preset mode to send control commands to the corresponding RF front-end chip among the at least one RF front-end chip 102, thereby causing the corresponding RF front-end chip to reduce its transmission power, achieving temperature management, and effectively and reliably solving the problem of overheating during prolonged use of the terminal device.

[0039] As described above, the switching transistor 203 is turned on by the voltage of at least one switching diode 202, thereby outputting a preset low level at the output terminal 2031 of the switching transistor 203. In some embodiments, in response to detecting that the output terminal 2031 of the switching transistor 203 outputs a preset low level,

[0040] The control unit 101 also detects the output terminal 2031 of the switching transistor 203 after a preset time interval. Upon detecting that the output terminal 2031 of the switching transistor 203 outputs a preset high level, the control unit 101 is triggered to enter a non-preset mode to send control commands to at least one RF front-end.

[0041] The corresponding RF front-end chip in the terminal chip 102 is activated, thereby restoring the corresponding RF front-end chip to 0 transmit power; in response to the detection that the output terminal 2031 of the switching transistor 203 does not output a preset value.

[0042] When the signal is high, the control unit 101 continues to maintain the preset mode.

[0043] The control unit 101 can set a timer to detect the output terminal 2031 of the switching transistor 203 after a preset time.

[0044] The preset mode can refer to a high-temperature mode, meaning that when the output of the switching transistor 103 is detected to be low (5), the control unit 101 will enter the preset mode and degrade the RF front-end chip.

[0045] Temperature operation, non-preset mode can refer to normal mode, that is, when the output of the switching transistor 103 is detected to be high level, the control unit 101 enters non-preset mode, that is, the RF front-end chip is in normal working state.

[0046] When the output of the switching transistor 203's output terminal 2031 is low, the control unit 1010 is triggered to enter the preset mode. After a preset time, the control unit 101 detects the output terminal 2031 of the switching transistor 203 again. If the output terminal 2031 of the switching transistor 203 is detected to be high, the control unit 101 enters the non-preset mode, that is, sends a command to the corresponding RF front-end chip to restore the RF front-end chip's transmission power. If the output terminal 2031 of the switching transistor 203 is detected to be low, that is, after the preset time, the output terminal 2031 of the switching transistor 203 is still low, the control unit 101 continues to maintain the preset mode.

[0047] As described above, each temperature detection branch 201 is positioned close to at least one of the radio frequency front-end chips 102, and in some embodiments, in combination with Figure 3 , Figure 3 This is a partial circuit diagram of the temperature management circuit according to an embodiment of this application. Each temperature detection branch 201 includes a protective resistor Ra and a thermistor Rb connected in series, one end of which is connected to a first preset voltage and the other end is grounded. The protective resistor Ra and the thermistor Rb are connected to the positive terminal of the corresponding switching diode in at least one switching diode 202.

[0048] The protection resistor Ra has a fixed resistance value and can be selected according to the actual situation, such as depending on the different RF front-end chips. This application does not limit this selection. The thermistor Rb can be a negative temperature coefficient thermistor (NTC).

[0049] As described above, the control terminal 2033 of the switching transistor 203 is connected to the negative terminal of at least one switching diode 202, and the output terminal 2031 is connected to the control unit 101. In some embodiments, combined with... Figure 4 , Figure 4 This is a partial circuit diagram of the temperature management circuit 20 according to an embodiment of this application. The temperature management circuit 20 also includes a first resistor R1 and a second resistor R2, wherein the control terminal 2033 of the switching transistor 203 is grounded through the second resistor R2, and the output terminal 2031 of the switching transistor 203 is connected to a second preset voltage through the first resistor R1.

[0050] The second preset voltage can be the same as the first preset voltage in the above embodiment.

[0051] As mentioned above, Figure 1 In the terminal device 10, at least one radio frequency front-end chip 102 is included, and in some embodiments, it is combined with... Figure 5 , Figure 5This is a partial circuit diagram of the temperature management circuit 20 according to an embodiment of this application. At least one radio frequency front-end chip 102 includes a first radio frequency front-end chip 1021, a second radio frequency front-end chip 1022, and a third radio frequency front-end chip 1023.

[0052] At least one temperature detection branch 201 includes a first temperature detection branch 2011, a second temperature detection branch 2012 and a third temperature detection branch 2013; at least one switching diode 202 includes a first switching diode D1, a second switching diode D2 and a third switching diode D3.

[0053] The first temperature detection branch 2011 is located near the first RF front-end chip 1021 and is used to detect the temperature of the first RF front-end chip 1021. It is connected to the control terminal 2033 of the switching transistor 203 via the first switching diode D1.

[0054] The second temperature detection branch 2012 is located near the second RF front-end chip 1022 and is used to detect the temperature of the second RF front-end chip 1022. It is connected to the control terminal 2033 of the switching transistor 203 via the second switching diode D2.

[0055] The third temperature detection branch 2013 is located near the third RF front-end chip 1023 and is used to detect the temperature of the third RF front-end chip 1023. It is connected to the control terminal 2033 of the switching transistor 203 via the third switching diode D3.

[0056] For example, the first RF front-end chip 1021 is a 2G / 3G RF front-end chip, the second RF front-end chip 1022 is a 4G / 5G RF front-end chip, and the third RF front-end chip 1023 is a 5G NR RF front-end chip. The first temperature detection branch 2011 is located near the 2G / 3G RF front-end chip and is used to detect the temperature of the 2G / 3G RF front-end chip; the second temperature detection branch 2012 is located near the 4G / 5G RF front-end chip and is used to detect the temperature of the 4G / 5G RF front-end chip; and the third temperature detection branch 2013 is located near the 5G NR RF front-end chip and is used to detect the temperature of the third RF front-end chip 1023.

[0057] In some embodiments, combined with Figure 6 , Figure 6 This is a circuit diagram of an embodiment of the temperature management circuit 20 of this application. The first temperature detection branch 2011 includes a first protection resistor Ra1 and a first thermistor Rb1 connected in series. One end is connected to a third preset voltage, and the other end is grounded. The first protection resistor Ra1 and the first thermistor Rb1 are connected to the positive terminal of the first switching diode D1.

[0058] The second temperature detection branch 2012 includes a second protection resistor Ra2 and a second thermistor Rb2 connected in series. One end is connected to a third preset voltage, and the other end is grounded. The second protection resistor Ra2 and the second thermistor Rb2 are connected to the positive terminal of the second switching diode D2.

[0059] The third temperature detection branch 2013 includes a third protection resistor Ra3 and a third thermistor Rb3 connected in series. One end is connected to a third preset voltage, and the other end is grounded. The third protection resistor Ra3 and the third thermistor Rb3 are connected to the positive terminal of the third switching diode D3.

[0060] Among them, the negative temperature coefficients of the first thermistor Rb1, the second thermistor Rb2, and the third thermistor Rb3 are different from each other.

[0061] Please see Figure 7 , Figure 7 This is a flowchart illustrating an embodiment of the control method of this application. The method is applied to a terminal device, such as the one described above. Figure 1 The terminal device 10 of the embodiment includes a control unit 101, at least one radio frequency front-end chip 102 connected to the control unit 101, and a temperature management circuit as described in any of the above embodiments connected to the control unit 101.

[0062] Specifically, this may include the following steps:

[0063] S71: In response to the temperature of at least one RF front-end chip 102 being greater than or equal to a preset temperature threshold, the control circuit detects that the temperature management circuit outputs a preset low level.

[0064] When the temperature detection branch 201 detects that the temperature of the RF front-end chip 102 is greater than or equal to the set temperature value, the temperature management circuit will output a low level, and the control circuit of the terminal device 10 will detect the low level.

[0065] S72: In response to the detection of a preset low level output by the temperature management circuit, the control unit 101 is triggered to enter a preset mode to send control commands to the corresponding RF front-end chip in at least one RF front-end chip 102, thereby causing the corresponding RF front-end chip to reduce its transmission power and achieve temperature management.

[0066] When the output of the temperature management circuit is detected to be low, the control unit 101 of the terminal device 10 is triggered to enter the preset state, namely the high temperature state, and sends a control command to the radio frequency front-end chip corresponding to the detected temperature, so that the radio frequency front-end chip reduces its transmission power, thereby realizing temperature management.

[0067] In this embodiment, in response to the temperature of at least one radio frequency front-end chip 102 being greater than or equal to a preset temperature threshold, the control circuit of the terminal device 10 detects that the temperature management circuit outputs a preset low level; in response to the detection of the temperature management circuit outputting a preset low level, the control unit 101 is triggered to enter a preset mode to send control commands to the corresponding radio frequency front-end chip in at least one radio frequency front-end chip 102, thereby causing the corresponding radio frequency front-end chip to reduce its transmission power, realize temperature management, and solve the problem of overheating when the terminal device 10 is used for a long time.

[0068] In some embodiments, in response to the temperature of at least one RF front-end chip 102 being less than a preset temperature threshold, the control circuit detects that the temperature management circuit outputs a preset high level; in response to the detection that the temperature management circuit outputs a preset high level, the control unit 101 is triggered to enter a non-preset mode to send control commands to the corresponding RF front-end chip in at least one RF front-end chip 102, thereby causing the corresponding RF front-end chip to restore its transmission power.

[0069] When the detected temperatures of the RF front-end chips are all below the preset temperature threshold, the temperature management circuit outputs a high level, thereby triggering the control unit 101 of the terminal device 10 to enter the non-preset module. At the same time, it sends a control command to the RF front-end chip with the detected temperature, thereby enabling the corresponding RF front-end chip to restore its transmission power.

[0070] In some embodiments, in response to detecting that the temperature management circuit outputs a preset low level, the control unit 101 also detects the output of the temperature management circuit after a preset time interval and / or alerts the user of the terminal device 10; in response to detecting that the temperature management circuit outputs a preset high level, the control unit 101 is triggered to enter a non-preset mode to send control commands to the corresponding RF front-end chip in at least one RF front-end chip 102, thereby causing the corresponding RF front-end chip to restore its transmission power; in response to detecting that the temperature management circuit does not output a preset high level, the control unit 101 continues to maintain the preset mode.

[0071] Users of the terminal device 10 can receive reminders by sending messages, using indicator lights, or other means.

[0072] If the temperature management circuit output is detected to be low, that is, if the output of the temperature management circuit detected by the control unit 101 of the terminal device 10 is still low after a preset time, the user of the terminal device 10 will be reminded. If the output of the temperature management circuit is detected to be high again, the control unit 101 of the device will enter the non-preset mode, that is, send a command to the corresponding radio frequency front-end chip to restore the transmission power of the radio frequency front-end chip. If the output of the temperature management circuit is still detected to be low, the control unit 101 of the device will continue to maintain the preset mode.

[0073] Please see Figure 8 , Figure 8 This is a schematic diagram of another embodiment of the terminal device 80 of this application. The terminal device 80 includes a control unit 802 and at least one radio frequency front-end chip 801 connected to the control unit 802, and a temperature management circuit 803 connected to the control unit 802. The temperature management circuit 803 can be the temperature management circuit 20 as described in the above embodiment. The description of the temperature management circuit 20 is detailed in the description of the embodiment and will not be described again here.

[0074] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0075] In some embodiments, the functions or modules of the apparatus provided in this disclosure can be used to perform the methods described in the above method embodiments. The specific implementation can be referred to the description of the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0076] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0077] In the several embodiments provided in this application, it should be understood that the disclosed methods and apparatus can be implemented in other ways. For example, the apparatus implementations described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0078] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0079] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods of various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A temperature management circuit, characterized in that, Applied to a terminal device, the terminal device includes a control unit and at least one radio frequency front-end chip connected to the control unit, the temperature management circuit being connected to the control unit and including: At least one temperature detection branch, wherein each of the temperature detection branches is disposed close to one of the at least one radio frequency front-end chips and is used to detect the temperature of the at least one radio frequency front-end chip; At least one switching diode, wherein the anode of each switching diode is connected to one of the at least one temperature sensing branches; A switching transistor, with its control terminal connected to the negative terminal of at least one switching diode, its output terminal connected to the control unit, and its input terminal grounded; In response to the temperature of any one of the at least one RF front-end chips being greater than or equal to a preset temperature threshold, the switching transistor is turned on by the voltage of the at least one switching diode, thereby outputting a preset low level at the output terminal of the switching transistor. In response to the detection that the output terminal of the switching transistor outputs the preset low level, the control unit is triggered to enter the preset mode to send control commands to the corresponding RF front-end chip in the at least one RF front-end chip, thereby causing the corresponding RF front-end chip to reduce its transmission power and achieve temperature management.

2. The circuit according to claim 1, characterized in that, In response to detecting that the output terminal of the switching transistor outputs the preset low level, the control unit further detects the output terminal of the switching transistor after a preset time interval. Specifically, in response to detecting that the output terminal of the switching transistor outputs the preset high level, the control unit is triggered to enter a non-preset mode to send control commands to the corresponding RF front-end chip among the at least one RF front-end chips, thereby enabling the corresponding RF front-end chip to restore its transmit power. In response to detecting that the output terminal of the switching transistor does not output the preset high level, the control unit continues to maintain the preset mode.

3. The circuit according to claim 1, characterized in that, Each of the at least one temperature detection branch includes a protective resistor and a thermistor connected in series, one end of which is connected to a first preset voltage and the other end is grounded. The protective resistor and the thermistor are connected to the positive terminal of the corresponding switching diode in the at least one switching diode.

4. The circuit according to claim 1, characterized in that, The temperature management circuit also includes a first resistor and a second resistor, wherein the control terminal of the switching transistor is grounded through the second resistor, and the output terminal of the switching transistor is connected to a second preset voltage through the first resistor.

5. The circuit according to any one of claims 1-4, characterized in that, The at least one radio frequency front-end chip includes a first radio frequency front-end chip, a second radio frequency front-end chip, and a third radio frequency front-end chip; The at least one temperature detection branch includes a first temperature detection branch, a second temperature detection branch, and a third temperature detection branch; The at least one switching diode includes a first switching diode, a second switching diode, and a third switching diode; The first temperature detection branch is located close to the first RF front-end chip and is used to detect the temperature of the first RF front-end chip. It is connected to the control terminal of the switching transistor via the first switching diode. The second temperature detection branch is located close to the second RF front-end chip and is used to detect the temperature of the second RF front-end chip. It is connected to the control terminal of the switching transistor via the second switching diode. The third temperature detection branch is located close to the third RF front-end chip and is used to detect the temperature of the third RF front-end chip. It is connected to the control terminal of the switching transistor via the third switching diode.

6. The circuit according to claim 5, characterized in that, The first temperature detection branch includes a first protective resistor and a first thermistor connected in series, one end of which is connected to a third preset voltage and the other end is grounded. The first protective resistor and the first thermistor are connected to the positive terminal of the first switching diode. The second temperature detection branch includes a second protective resistor and a second thermistor connected in series, one end of which is connected to the third preset voltage and the other end is grounded. The second protective resistor and the second thermistor are connected to the positive terminal of the second switching diode. The third temperature detection branch includes a third protection resistor and a third thermistor connected in series. One end is connected to the third preset voltage, and the other end is grounded. The third protection resistor and the third thermistor are connected to the positive terminal of the third switching diode. The negative temperature coefficients of the first thermistor, the second thermistor, and the third thermistor are different from each other.

7. A control method, characterized in that, Applied to a terminal device, the terminal device including a control unit, at least one radio frequency front-end chip connected to the control unit, and a temperature management circuit as described in any one of claims 1-6 connected to the control unit, the method comprising: In response to the temperature of the at least one radio frequency front-end chip being greater than or equal to a preset temperature threshold, the control circuit detects that the temperature management circuit outputs a preset low level. In response to the detection of a preset low level output by the temperature management circuit, the control unit is triggered to enter a preset mode to send control commands to the corresponding RF front-end chip in the at least one RF front-end chip, thereby causing the corresponding RF front-end chip to reduce its transmission power and achieve temperature management.

8. The method according to claim 7, characterized in that, The method further includes: In response to the fact that the temperature of at least one radio frequency front-end chip is lower than the preset temperature threshold, the control circuit detects that the temperature management circuit outputs a preset high level. In response to the detection of a preset high level output from the temperature management circuit, the control unit is triggered to enter a non-preset mode to send control commands to the corresponding RF front-end chip in the at least one RF front-end chip, thereby enabling the corresponding RF front-end chip to restore its transmission power.

9. The method according to any one of claims 7 or 8, characterized in that, The method further includes: In response to detecting that the temperature management circuit outputs the preset low level, the control unit also detects the output of the temperature management circuit after a preset time interval, and / or alerts the user of the terminal device; In response to the detection of a preset high level output by the temperature management circuit, the control unit is triggered to enter a non-preset mode to send control commands to the corresponding RF front-end chip in the at least one RF front-end chip, thereby enabling the corresponding RF front-end chip to restore its transmission power. In response to the detection that the temperature management circuit does not output the preset high level, the control unit continues to maintain the preset mode.

10. A terminal device, characterized in that, It includes a control unit, at least one radio frequency front-end chip connected to the control unit, and a temperature management circuit as described in any one of claims 1-6 connected to the control unit.

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