Power control circuit

Abstract

The embodiments of the present application relate to a power control circuit, comprising: a temperature acquisition circuit, a signal detection circuit and a power distribution circuit, wherein the temperature acquisition circuit is configured to acquire a temperature signal corresponding to a power supply end, and transmit the temperature signal to the signal detection circuit; the signal detection circuit is configured to determine whether the temperature represented by the temperature signal is greater than or equal to a preset temperature threshold value, so as to obtain a determination result, and transmit the determination result to the power distribution circuit; and the power distribution circuit is configured to determine an output power of the power distribution circuit on the basis of the determination result. Therefore, by means of the separate design of a temperature acquisition circuit and a power distribution circuit, the size of the end connected to an electrical device can be reduced, and the power outputted by the power distribution circuit can also match the temperature corresponding to a power supply end.

Description

Power control circuit

[0001] This application claims priority to Chinese Patent Application No. 202411025706.3, filed on July 29, 2024, entitled "Power Control Circuit", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of charging, and more particularly to a power control circuit. Background Technology

[0003] With the widespread use of multi-port chargers and the significant increase in the power of electrical devices, the power of chargers has risen accordingly. Some current desktop charging devices centralize all functional circuits, making them relatively bulky and resulting in a larger size of the power control circuit connected to the electrical device.

[0004] However, if the functions of a desktop charging device are designed separately, the distance between the multiple parts will prevent the automatic reduction of power to address the temperature rise issue as the temperature of different parts changes, resulting in a mismatch between the power output of the power distribution circuit and the temperature corresponding to the power supply terminal.

[0005] It is evident that a key technical challenge is how to reduce the size of the power control circuit at the end connected to the electrical equipment while simultaneously matching the power output of the power distribution circuit with the corresponding temperature at the power supply end. Summary of the Invention

[0006] In view of this, in order to solve some or all of the above-mentioned technical problems, this application provides a power control circuit.

[0007] In a first aspect, embodiments of this application provide a power control circuit comprising: a temperature acquisition circuit, a signal detection circuit, and a power distribution circuit, wherein the signal detection circuit is signal-connected to the temperature acquisition circuit and the power distribution circuit respectively; wherein:

[0008] The temperature acquisition circuit is used to: acquire a temperature signal corresponding to the power supply terminal; wherein, the temperature signal represents the temperature of the temperature acquisition circuit when the temperature acquisition circuit is set within a first distance threshold range of the power supply terminal; the power supply terminal is used to provide power to the electrical equipment connected to the power distribution circuit; and transmit the temperature signal to the signal detection circuit.

[0009] The signal detection circuit is used to: determine whether the temperature of the temperature acquisition circuit is greater than or equal to a preset temperature threshold, so as to obtain a determination result; and transmit the determination result to the power distribution circuit.

[0010] The power distribution circuit is used to: determine the output power of the power distribution circuit based on the determination result, wherein the distance between the power distribution circuit and the power supply terminal is greater than the first distance threshold.

[0011] In one possible implementation, the temperature acquisition circuit includes a first resistor, a second resistor, a first thermistor, a first capacitor, and a first voltage regulator;

[0012] The first end of the first resistor is connected to the power supply terminal, and the second end is connected to the first end of the second resistor.

[0013] The second end of the second resistor is connected to the ground terminal;

[0014] The first end of the first thermistor is connected to the first end of the second resistor, and the second end is connected to the second end of the second resistor;

[0015] The first terminal of the first capacitor is connected to the first terminal of the second resistor, and the second terminal is connected to the second terminal of the second resistor.

[0016] The first terminal of the first voltage regulator is connected to the first terminal of the second resistor, the second terminal is connected to the second terminal of the second resistor, and the third terminal is connected to the signal detection circuit.

[0017] In one possible implementation, the signal detection circuit includes a signal conversion circuit and an electrical parameter detection circuit;

[0018] The signal conversion circuit is connected to the temperature acquisition circuit and the electrical parameter detection circuit respectively.

[0019] The electrical parameter detection circuit is also signal-connected to the power distribution circuit;

[0020] The signal conversion circuit includes a primary side circuit of an optocoupler and a secondary side circuit of an optocoupler.

[0021] The input terminal of the primary side circuit of the optocoupler is connected to the output terminal of the temperature acquisition circuit, and the output terminal of the primary side circuit of the optocoupler is connected to the input terminal of the secondary side circuit of the optocoupler.

[0022] The output terminal of the optocoupler secondary circuit is connected to the input terminal of the electrical parameter detection circuit.

[0023] In one possible implementation, the primary side circuit of the optocoupler includes an optocoupler control circuit and a positive feedback circuit;

[0024] The positive feedback circuit is connected to the optocoupler control circuit and the temperature acquisition circuit, respectively.

[0025] The optocoupler control circuit is signal-connected to the secondary side circuit of the optocoupler;

[0026] When the first voltage regulator is turned off, the optocoupler control circuit is used to control the temperature acquisition circuit to transmit the output signal of the primary side circuit of the optocoupler to the secondary side circuit of the optocoupler.

[0027] The positive feedback circuit is used to adjust the operating hysteresis of the first voltage regulator.

[0028] In one possible implementation, the optocoupler control circuit includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first transistor, and an optocoupler light-emitting side;

[0029] The first end of the third resistor is connected to the first end of the sixth resistor, and the second end is connected to the first end of the fourth resistor;

[0030] The second end of the fourth resistor is connected to the first end of the fifth resistor;

[0031] The second end of the fifth resistor is connected to the temperature acquisition circuit;

[0032] The second end of the sixth resistor is connected to the first end of the light-emitting side of the optocoupler;

[0033] The second end of the light-emitting side of the optocoupler is connected to the first end of the first transistor;

[0034] The second terminal of the first transistor is connected to the first terminal of the fifth resistor, and the third terminal is connected to the second terminal of the fifth resistor;

[0035] The first end of the seventh resistor is connected to the first end of the light-emitting side of the optocoupler, and the second end is connected to the positive feedback circuit.

[0036] The second end of the light-emitting side of the optocoupler is connected to the positive feedback circuit.

[0037] In one possible implementation, the positive feedback circuit includes a ninth resistor;

[0038] The first end of the ninth resistor is connected to the temperature acquisition circuit, and the second end is connected to the optocoupler control circuit.

[0039] In one possible implementation, the optocoupler secondary side circuit includes a signal receiving circuit, a voltage regulating circuit, and a voltage output circuit;

[0040] The signal receiving circuit is connected to the voltage output circuit.

[0041] The voltage regulator circuit is connected to the signal receiving circuit and the voltage output circuit respectively;

[0042] When the light-emitting side of the optocoupler is turned on, the signal receiving circuit is used to generate a first voltage, wherein the first voltage is greater than or equal to a first voltage threshold.

[0043] The voltage regulator circuit is used to stabilize the output voltage of the voltage output circuit.

[0044] When the signal receiving circuit generates the first voltage, the voltage output circuit outputs a second voltage, wherein the second voltage is greater than or equal to a second voltage threshold.

[0045] In one possible implementation, the signal receiving circuit includes a twenty-first resistor, a tenth resistor, a fourth capacitor, a second transistor, an eleventh resistor, a fifth capacitor, and an optocoupler light-receiving side.

[0046] The first end of the 21st resistor is connected to the first end of the 10th resistor, and the second end is connected to the first end of the 2nd transistor;

[0047] The first terminal of the fourth capacitor is connected to the first terminal of the tenth resistor, and the second terminal is connected to the second terminal of the tenth resistor.

[0048] The second terminal of the second transistor is connected to the second and third terminals of the tenth resistor, which are connected to the first terminal of the eleventh resistor.

[0049] The first terminal of the fifth capacitor is connected to the first terminal of the eleventh resistor, and the second terminal is connected to the second terminal of the eleventh resistor.

[0050] The first end of the light-receiving side of the optocoupler is connected to the second end of the second transistor, and the second end is connected to the ground terminal.

[0051] In one possible implementation, the voltage output circuit includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a third transistor;

[0052] The first end of the thirteenth resistor is the output end of the voltage output circuit, and the second end is connected to the first end of the fourteenth resistor.

[0053] The first end of the third transistor is connected to the first end of the fifteenth resistor, the second end is connected to the ground terminal, and the third end is connected to the second end of the fourteenth resistor.

[0054] In one possible implementation, the voltage regulator circuit includes a seventeenth resistor, an eighteenth resistor, an eighth capacitor, a nineteenth resistor, a twentieth resistor, a second voltage regulator, a third voltage regulator, and a twenty-second resistor;

[0055] The first end of the seventeenth resistor is connected to the signal receiving circuit, and the second end is connected to the first end of the eighteenth resistor;

[0056] The second terminal of the eighteenth resistor is connected to the second terminal of the eighth capacitor;

[0057] The first terminal of the eighth capacitor is connected to the second terminal of the twentieth resistor;

[0058] The first end of the twentieth resistor is connected to the second end of the nineteenth resistor;

[0059] The first end of the nineteenth resistor is connected to the signal receiving circuit.

[0060] The first terminal of the second voltage regulator is connected to the first terminal of the twentieth resistor, and the second terminal is connected to the second terminal of the twentieth resistor;

[0061] The first end of the third voltage regulator is connected to the first end of the eighth capacitor, the second end is connected to the ground terminal, and the third end is connected to the first end of the twenty-second resistor.

[0062] The second end of the 22nd resistor is connected to the ground terminal.

[0063] In one possible implementation, the electrical parameter detection circuit includes an eighteenth resistor, a nineteenth resistor, a twentieth resistor, and a sixth capacitor;

[0064] The first end of the eighteenth resistor is connected to the bus voltage input terminal, and the second end is connected to the first end of the nineteenth resistor;

[0065] The second end of the nineteenth resistor is connected to the ground terminal;

[0066] The first end of the twentieth resistor is connected to the first end of the nineteenth resistor, and the second end is connected to the output of the signal conversion circuit.

[0067] The first end of the sixth capacitor is connected to the output end of the signal conversion circuit, and the second end is connected to the ground end.

[0068] The power control circuit provided in this application embodiment includes: a temperature acquisition circuit, a signal detection circuit, and a power distribution circuit. The signal detection circuit is signal-connected to the temperature acquisition circuit and the power distribution circuit, respectively. The temperature acquisition circuit is used to: acquire a temperature signal corresponding to the power supply terminal; wherein the temperature signal represents the temperature of the temperature acquisition circuit when the temperature acquisition circuit is set within a first distance threshold range of the power supply terminal; the power supply terminal is used to provide power to the electrical equipment connected to the power distribution circuit; and transmit the temperature signal to the signal detection circuit. The signal detection circuit is used to: determine whether the temperature of the temperature acquisition circuit is greater than or equal to a preset temperature threshold to obtain a determination result; and transmit the determination result to the power distribution circuit. The power distribution circuit is used to: determine the output power of the power distribution circuit based on the determination result, wherein the distance between the power distribution circuit and the power supply terminal is greater than the first distance threshold. Therefore, by separating the temperature acquisition circuit and the power distribution circuit, the volume of the end of the power control circuit connected to the electrical equipment can be reduced. The temperature acquisition circuit obtains the temperature signal corresponding to the power supply end, and the power distribution circuit uses it to determine the output power of the power distribution circuit based on whether the temperature indicated by the temperature signal is greater than or equal to a preset temperature threshold. Thus, the output power of the power distribution circuit can be matched with the temperature corresponding to the power supply end. Attached Figure Description

[0069] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0070] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0071] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0072] Figure 1 is a schematic diagram of a power control circuit provided in an embodiment of this application;

[0073] Figure 2A is a schematic diagram showing the structure and connection relationship of the primary side circuit of the optocoupler in the temperature acquisition circuit and the signal conversion circuit in a power control circuit provided in an embodiment of this application.

[0074] Figure 2B is a schematic diagram of the structure and connection relationship of the primary side circuit of the optocoupler in the temperature acquisition circuit and the signal conversion circuit in another power control circuit provided in the embodiment of this application;

[0075] Figure 3A is a schematic diagram of the structure of the optocoupler secondary side circuit in a power control circuit provided in an embodiment of this application;

[0076] Figure 3B is a schematic diagram of the structure of the optocoupler secondary side circuit in a power control circuit provided in an embodiment of this application;

[0077] Figure 4A is a schematic diagram showing the structure and connection relationship of a temperature acquisition circuit and a signal conversion circuit in a power control circuit provided in an embodiment of this application;

[0078] Figure 4B is a schematic diagram showing the structure and connection relationship of the temperature acquisition circuit and the signal conversion circuit in a power control circuit provided in an embodiment of this application;

[0079] Figure 5 is a schematic diagram of the electrical parameter detection circuit in a power control circuit provided in an embodiment of this application. Detailed Implementation

[0080] Various exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application.

[0081] Those skilled in the art will understand that the terms "first" and "second" in the embodiments of this application are only used to distinguish different steps, devices or modules, and do not represent any specific technical meaning, nor do they indicate the logical order between them.

[0082] It should also be understood that in this embodiment, "multiple" can refer to two or more, and "at least one" can refer to one, two or more.

[0083] It should also be understood that any component, data or structure mentioned in the embodiments of this application can generally be understood as one or more unless explicitly defined or given contrary guidance in the context.

[0084] Furthermore, the term "and / or" in this application 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, or B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship.

[0085] It should also be understood that the description of the various embodiments in this application emphasizes the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, they will not be described in detail.

[0086] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0087] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0088] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0089] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. To facilitate understanding of the embodiments of this application, the application will be described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0090] To address the technical problem in the prior art of how to reduce the size of the power control circuit connected to the electrical device while ensuring that the power output of the power distribution circuit matches the temperature corresponding to the power supply terminal, this application provides a power control circuit that can reduce the size of the power control circuit connected to the electrical device terminal while ensuring that the power output of the power distribution circuit matches the temperature corresponding to the power supply terminal.

[0091] Figure 1 is a schematic diagram of a power control circuit provided in an embodiment of this application. As shown in Figure 1, the power control circuit includes a temperature acquisition circuit 10, a signal detection circuit 20, and a power distribution circuit 30. The signal detection circuit 20 is connected to the temperature acquisition circuit 10 and the power distribution circuit 30 respectively.

[0092] The temperature acquisition circuit 10 is used to acquire a temperature signal corresponding to the power supply terminal. This temperature signal represents the temperature of the temperature acquisition circuit 10 when it is positioned within a first distance threshold range from the power supply terminal. The power supply terminal provides power to the electrical equipment connected to the power distribution circuit 30. The temperature signal is then transmitted to the signal conversion circuit.

[0093] The power supply end can be used to provide power. As an example, the power supply end can be a socket connected to mains power (such as a wall socket) or a power bank.

[0094] The first distance threshold can be a preset distance. The temperature acquisition circuit 10 may or may not be connected to the power supply. For example, the temperature acquisition circuit 10 can be connected to the power supply via an interface. In this case, the temperature acquisition circuit 10 is in contact with the power supply, and the distance between them is 0, which is less than the aforementioned first preset threshold. Alternatively, the temperature acquisition circuit 10 can be positioned within the aforementioned first distance threshold range of the power supply (i.e., less than or equal to the first distance threshold), but not in contact with the power supply.

[0095] Here, since the temperature signal represents the temperature of the temperature acquisition circuit 10 when the temperature acquisition circuit 10 is set within the first distance threshold range of the power supply terminal, the temperature signal can reflect the temperature of the power supply terminal. For example, the temperature represented by the temperature signal can be positively correlated with the temperature of the power supply terminal.

[0096] The signal detection circuit 20 is used to: determine whether the temperature of the temperature acquisition circuit 10 is greater than or equal to a preset temperature threshold, so as to obtain a determination result. The determination result is then transmitted to the power distribution circuit 30.

[0097] Here, the signal detection circuit 20 can first convert the temperature signal into an electrical parameter signal for transmission to the electrical parameter detection circuit. For example, the electrical parameter signal may include, but is not limited to, voltage, current, and power signals. The electrical parameter represented by the electrical parameter signal can have a preset relationship with the temperature represented by the temperature signal, such as a positive or negative correlation. Therefore, the temperature represented by the temperature signal can be reflected by the value of the electrical parameter in the electrical parameter signal through the preset relationship.

[0098] The determination result can indicate whether the temperature represented by the temperature signal is greater than or equal to a preset temperature threshold. For example, the temperature signal can be a high-level signal or a low-level signal.

[0099] The power distribution circuit 30 is used to: determine the output power of the power distribution circuit 30 based on the determination result, wherein the distance between the power distribution circuit 30 and the power supply terminal is greater than the first distance threshold.

[0100] In some cases, the power distribution circuit 30 and the temperature acquisition circuit 10 can be connected wirelessly or via a wired connection.

[0101] When the power distribution circuit 30 and the temperature acquisition circuit 10 are connected by a wire, the distance between the power distribution circuit 30 and the power supply terminal can be understood as the maximum connection distance between the power distribution circuit 30 and the power supply terminal. That is, when the power distribution circuit 30 and the temperature acquisition circuit 10 are connected by a cable, and the power distribution circuit 30, the temperature acquisition circuit 10, and the power supply terminal are located in a straight line, and the cable is in a straight line (not a curve), the distance between the power distribution circuit 30 and the power supply terminal is considered. In this case, since the power distribution circuit 30, the temperature acquisition circuit 10, and the power supply terminal are located in a straight line, the distance between the power distribution circuit 30 and the power supply terminal can be the sum of the following two: the cable length between the power distribution circuit 30 and the temperature acquisition circuit 10, and the distance between the temperature acquisition circuit 10 and the power supply terminal. The sum of these two can be greater than the aforementioned first distance threshold.

[0102] When the power distribution circuit 30 and the temperature acquisition circuit 10 are wirelessly connected, the distance between the power distribution circuit 30 and the power source can be understood as the maximum communication distance between them. That is, the maximum distance between the power distribution circuit 30 and the power source when they can communicate and are aligned in a straight line. This maximum communication distance represents the maximum distance at which communication is possible between the power distribution circuit 30 and the temperature acquisition circuit 10. In other words, when the power distribution circuit 30, the temperature acquisition circuit 10, and the power source are aligned in a straight line, if the distance between the power distribution circuit 30 and the power source exceeds this maximum distance, communication between the power distribution circuit 30 and the temperature acquisition circuit 10 will be impossible. For example, the temperature signal acquired by the temperature acquisition circuit 10 cannot be transmitted to the power distribution circuit 30. In this case, since the power distribution circuit 30, the temperature acquisition circuit 10, and the power supply are located in a straight line, the distance between the power distribution circuit 30 and the power supply can be the sum of the following two: the maximum communication distance between the power distribution circuit 30 and the temperature acquisition circuit 10, and the distance between the temperature acquisition circuit 10 and the power supply. The sum of the above two can be greater than the aforementioned first distance threshold.

[0103] It should be noted that in practice, the power distribution circuit 30, the temperature acquisition circuit 10, and the power supply terminal may not be located in a straight line, and / or the cable may not be in a straight line. The above description is only used as an example to explain the distance between the power distribution circuit 30 and the power supply terminal, and does not constitute a limitation on the positional relationship between the power distribution circuit 30, the temperature acquisition circuit 10, and the power supply terminal.

[0104] Please refer to Figure 2A, which is a schematic diagram of the structure and connection relationship of the primary side circuit of the optocoupler in the temperature acquisition circuit and the signal detection circuit in a power control circuit provided in an embodiment of this application.

[0105] In some optional implementations of this embodiment, as shown in FIG2A, the temperature acquisition circuit 10 includes a first resistor R273, a second resistor R274, a first thermistor NTC2, a first capacitor C14, and a first voltage regulator U8.

[0106] The first end of the first resistor R273 is connected to the power supply terminal VCC, and the second end is connected to the first end of the second resistor R274.

[0107] The second end of the second resistor R274 is connected to the ground terminal GND.

[0108] The first terminal of the first thermistor NTC2 is connected to the first terminal of the second resistor R274, and the second terminal is connected to the second terminal of the second resistor R274.

[0109] The first terminal of the first capacitor C14 is connected to the first terminal of the second resistor R274, and the second terminal is connected to the second terminal of the second resistor R274.

[0110] The first terminal of the first voltage regulator U8 is connected to the first terminal of the second resistor R274, the second terminal is connected to the second terminal of the second resistor R274, and the third terminal is connected to the signal detection circuit 20.

[0111] It is understood that in the above optional implementation, the temperature acquisition circuit 10 includes a first resistor R273, a first thermistor NTC2, a second resistor R274, a first capacitor C14, and a first voltage regulator U8. Thus, the temperature of the internal components of the temperature acquisition circuit 10 connected to the power supply terminal can be detected by the first thermistor NTC2. When the temperature of the component (that is, the temperature represented by the temperature signal) rises, the resistance of the first thermistor NTC2 will decrease, and the first resistor R273 and the second resistor R274 will divide the voltage, controlling the first voltage regulator U8 to turn off. When the temperature of the component decreases, the resistance of the first thermistor NTC2 will increase, thereby controlling the first voltage regulator U8 to turn on.

[0112] Optionally, the temperature acquisition circuit 10 can also be composed of other components. For example, as shown in Figures 4A and 4B, Figure 4A is a schematic diagram of the structure and connection relationship of the temperature acquisition circuit and signal conversion circuit in a power control circuit provided in an embodiment of this application, and Figure 4B is a schematic diagram of the structure and connection relationship of the temperature acquisition circuit and signal conversion circuit in another power control circuit provided in an embodiment of this application. In Figures 4A and 4B, the temperature acquisition circuit 10 includes a first thermistor NTC2. The first thermistor NTC2 is connected to the signal detection circuit 20. In this case, the structure of the signal detection circuit 20 can be as shown by reference numeral 20 in Figure 4A or Figure 4B.

[0113] In some application scenarios of the above-mentioned optional implementations, the signal detection circuit 20 includes a signal conversion circuit and an electrical parameter detection circuit.

[0114] The aforementioned signal conversion circuit is connected to the temperature acquisition circuit 10 and the electrical parameter detection circuit, respectively.

[0115] The aforementioned electrical parameter detection circuit is also connected to the aforementioned power distribution circuit 30 via signal connection.

[0116] The aforementioned signal conversion circuit includes a primary side circuit and a secondary side circuit of the optocoupler.

[0117] The input terminal of the primary side circuit of the aforementioned optocoupler is connected to the output terminal of the aforementioned temperature acquisition circuit 10, and the output terminal of the primary side circuit of the aforementioned optocoupler is connected to the input terminal of the aforementioned secondary side circuit of the aforementioned optocoupler.

[0118] The output terminal of the aforementioned optocoupler secondary circuit is connected to the input terminal of the aforementioned electrical parameter detection circuit.

[0119] When the first voltage regulator U8 is turned off, the temperature acquisition circuit 10 transmits the temperature signal to the primary side circuit of the optocoupler, the primary side circuit of the optocoupler transmits the output signal of the primary side circuit of the optocoupler to the secondary side circuit of the optocoupler, and the secondary side circuit of the optocoupler transmits the output signal of the secondary side circuit of the optocoupler to the electrical parameter detection circuit.

[0120] It is understandable that in the above application scenario, when the first regulator U8 is turned off, the optocoupler can be turned on, thereby feeding back the signal from the primary side circuit of the optocoupler to the secondary side circuit. Therefore, since signal communication is achieved through the primary and secondary side circuits of the optocoupler, wiring can be reduced, and the two circuits can be isolated to prevent interference signals such as high voltage and high current from being transmitted from one side to the other, ensuring the stability and safety of the circuit.

[0121] In some of the above application scenarios, the primary side circuit of the optocoupler includes an optocoupler control circuit 2001 and a positive feedback circuit 2002.

[0122] The positive feedback circuit 2002 is connected to the optocoupler control circuit 2001 and the temperature acquisition circuit 10, respectively.

[0123] The aforementioned optocoupler control circuit 2001 is signal-connected to the aforementioned optocoupler secondary side circuit.

[0124] When the first voltage regulator U8 in the optocoupler control circuit 2001 is turned off, the optocoupler control circuit 2001 is used to control the temperature acquisition circuit 10 to transmit the output signal of the primary side circuit of the optocoupler to the secondary side circuit of the optocoupler.

[0125] The aforementioned positive feedback circuit 2002 is used to adjust the operating hysteresis of the aforementioned first voltage regulator U8.

[0126] It is understandable that in some voltage regulators, when the input voltage rises to a certain value, the regulator begins to adjust and stabilize the output voltage; however, when the input voltage drops, the regulator may not stop adjusting immediately, but rather stops adjusting or switches to another operating state only when the input voltage drops to a value slightly lower than the initial trigger value. In the above situation, by adjusting the operating hysteresis of the first voltage regulator U8, the frequent switching of the regulator's operating state when the input voltage approaches the threshold can be reduced or even avoided, thereby improving the stability and reliability of the first voltage regulator U8.

[0127] In some examples of the above situations, the optocoupler control circuit 2001 includes a third resistor R277, a fourth resistor R278, a fifth resistor R279, a sixth resistor R280, a seventh resistor R281, a first transistor Q35, and an optocoupler light-emitting side U21A.

[0128] The first end of the third resistor R277 is connected to the first end of the sixth resistor R280, and the second end is connected to the first end of the fourth resistor R278.

[0129] The second terminal of the fourth resistor R278 is connected to the first terminal of the fifth resistor R279.

[0130] The second end of the fifth resistor R279 is connected to the temperature acquisition circuit 10.

[0131] The second end of the sixth resistor R280 is connected to the first end of the light-emitting side U21A of the optocoupler.

[0132] The second end of the aforementioned optocoupler light-emitting side U21A is connected to the first end of the aforementioned first transistor Q35.

[0133] The second terminal of the first transistor Q35 is connected to the first terminal of the fifth resistor R279, and the third terminal is connected to the second terminal of the fifth resistor R279.

[0134] The first end of the seventh resistor R281 is connected to the first end of the light-emitting side U21A of the aforementioned optocoupler, and the second end is connected to the aforementioned positive feedback circuit 2002.

[0135] The second end of the aforementioned optocoupler light-emitting side U21A is connected to the aforementioned positive feedback circuit 2002.

[0136] Optionally, as shown in Figure 2B, the optocoupler control circuit 2001 further includes a second capacitor C52, the first end of which is connected to the second end of the first transistor Q35, and the second end is connected to the third end of the first transistor Q35.

[0137] As can be understood, in the above example, the optocoupler control circuit 2001 includes a third resistor R277, a fourth resistor R278, a fifth resistor R279, a sixth resistor R280, a seventh resistor R281, a first transistor Q35, and an optocoupler light-emitting side U21A. Thus, when the first voltage regulator U8 is turned off, the voltage division of the third resistor R277, the fourth resistor R278, and the fifth resistor R279 causes the first transistor Q35 to conduct, which in turn causes the optocoupler light-emitting side U21A to conduct, thereby feeding back the signal from the primary side to the secondary side.

[0138] In some of the examples described above, the positive feedback circuit 2002 includes a ninth resistor R276. The first terminal of the ninth resistor is connected to the temperature acquisition circuit 10, and the second terminal is connected to the optocoupler control circuit 2001.

[0139] Optionally, as shown in Figure 2B, the positive feedback circuit 2002 may also include an eighth resistor R275 and a third capacitor C23.

[0140] The first end of the eighth resistor R275 is connected to the temperature acquisition circuit 10, and the second end is connected to the first end of the third capacitor C23.

[0141] The second terminal of the third capacitor C23 is connected to the optocoupler control circuit 2001.

[0142] The first end of the ninth resistor R276 and the first and second ends of the eighth resistor R275 are connected to the optocoupler control circuit 2001.

[0143] It is understandable that, in the example above, the operating hysteresis of the first regulator U8 can be adjusted through the positive feedback circuit 2002.

[0144] Please refer to Figure 3A below. Figure 3A is a schematic diagram of the structure of the optocoupler secondary side circuit in a power control circuit provided in an embodiment of this application.

[0145] In some of the above application scenarios, the secondary side circuit of the optocoupler includes a signal receiving circuit 2011, a voltage regulating circuit 2012, and a voltage output circuit 2013.

[0146] The signal receiving circuit 2011 is connected to the voltage output circuit 2013.

[0147] The voltage regulator circuit 2012 is connected to the signal receiving circuit 2011 and the voltage output circuit 2013, respectively.

[0148] When the optocoupler's light-emitting side U21A is turned on, the signal receiving circuit 2011 is used to generate a first voltage.

[0149] Wherein, the aforementioned first voltage is greater than or equal to a first voltage threshold. As an example, when the first transistor Q35 is turned on, the optocoupler's light-emitting side U21A can be turned on.

[0150] The voltage regulator circuit 2012 is used to stabilize the output voltage of the voltage output circuit 2013.

[0151] When the signal receiving circuit 2011 generates the first voltage, the voltage output circuit 2013 outputs the second voltage.

[0152] Wherein, the second voltage is greater than or equal to the second voltage threshold.

[0153] It is understood that the main function of the aforementioned voltage regulator circuit 2012 is to stabilize the output voltage. When the output load changes, it can adjust the operating mode of the primary side circuit of the optocoupler (e.g., determine the waveform matching the load, adjust the operating frequency of PWM (Pulse Width Modulation), the frequency of the switching waveform, etc.). Furthermore, when the optocoupler's light-emitting side U1A is turned on, the aforementioned signal receiving circuit 2011 generates a first voltage, and the voltage output circuit 2013 outputs a second voltage. Therefore, by determining whether the voltage output circuit 2013 outputs a second voltage greater than or equal to a second voltage threshold, it can be determined whether the optocoupler's light-emitting side U1A is turned on, and thus, the temperature condition of the temperature acquisition circuit 10 can be determined accordingly.

[0154] In some of the above-described embodiments, the signal receiving circuit 2011 includes a 21st resistor R282, a 10th resistor R283, a 4th capacitor C54, a 2nd transistor Q34, an 11th resistor R285, a 5th capacitor C53, and an optocoupler light-receiving side U21B.

[0155] The first end of the twenty-first resistor R282 is connected to the first end of the tenth resistor R283, and the second end is connected to the first end of the second transistor Q34.

[0156] The first terminal of the fourth capacitor C54 is connected to the first terminal of the tenth resistor R283, and the second terminal is connected to the second terminal of the tenth resistor R283.

[0157] The second terminal of the aforementioned second transistor Q34, the second terminal and the third terminal of the aforementioned tenth resistor R283 are connected to the first terminal of the aforementioned eleventh resistor R285.

[0158] The first terminal of the fifth capacitor C53 is connected to the first terminal of the eleventh resistor R285, and the second terminal is connected to the second terminal of the eleventh resistor R285.

[0159] The first end of the light-receiving side U21B of the aforementioned optocoupler is connected to the second end of the aforementioned second transistor Q34, and the second end is connected to the ground terminal.

[0160] Optionally, as shown in FIG3B, the signal receiving circuit 2011 may further include a twelfth resistor R284. The first end of the twelfth resistor R284 is connected to the second end of the light-receiving side U21B of the optocoupler. The second end of the twelfth resistor R284 is connected to the second end of the fifth capacitor C53.

[0161] It is understandable that, in the above scenario, the signal receiving circuit 2011 includes the twenty-first resistor R282, the tenth resistor R283, the fourth capacitor C54, the second transistor Q34, the eleventh resistor R285, the fifth capacitor C53, and the optocoupler light-receiving side U21B. When the optocoupler light-receiving side U21B is turned on, the first transistor Q35 is turned on, and the first transistor Q35 and the eleventh resistor R285 form a voltage divider. Compared to the off state of the first transistor Q35, AC_NTC generates a higher voltage.

[0162] Optionally, the voltage output circuit 2013 described above includes a thirteenth resistor R44, a fourteenth resistor R48, a fifteenth resistor R286, and a third transistor Q36.

[0163] The first end of the thirteenth resistor R44 is the output end of the voltage output circuit 2013, and the second end is connected to the first end of the fourteenth resistor R48.

[0164] The first terminal of the aforementioned third transistor Q36 is connected to the first terminal of the aforementioned fifteenth resistor R286, the second terminal is connected to the ground terminal SGND, and the third terminal is connected to the second terminal of the aforementioned fourteenth resistor R48.

[0165] It's understandable that when AC_NTC is high, the third transistor Q36 conducts and is connected in parallel with the fifteenth resistor R286 and resistor R55, thus increasing the output voltage. For example, the rated voltage is adjusted from 30V to approximately 32.5V. The AC-DC and DC-DC converters are connected by wires; because the AC-DC output voltage is increased, the DC-DC input voltage also increases.

[0166] In some of the above-described embodiments, the voltage regulator circuit 2012 includes a seventeenth resistor R54, an eighteenth resistor R52, an eighth capacitor C45, a nineteenth resistor R50, a twentieth resistor R51, a second voltage regulator U6A, a third voltage regulator U4, and a twenty-second resistor R55.

[0167] The first end of the seventeenth resistor R54 is connected to the signal receiving circuit, and the second end is connected to the first end of the eighteenth resistor R52.

[0168] The second terminal of the eighteenth resistor R52 is connected to the second terminal of the eighth capacitor C45.

[0169] The first terminal of the eighth capacitor C45 is connected to the second terminal of the twentieth resistor R51.

[0170] The first end of the twentieth resistor R51 is connected to the second end of the nineteenth resistor R50.

[0171] The first end of the nineteenth resistor R50 is connected to the signal receiving circuit 2011;

[0172] The first terminal of the second voltage regulator U6A is connected to the first terminal of the second twentieth resistor R51, and the second terminal is connected to the second terminal of the second twentieth resistor R51.

[0173] The first terminal of the third voltage regulator U4 is connected to the first terminal of the eighth capacitor C45, the second terminal is connected to the ground terminal SGND, and the third terminal is connected to the first terminal of the twenty-second resistor R55.

[0174] The second end of the twentieth resistor R55 is connected to the ground terminal SGND.

[0175] Optionally, as shown in Figure 3B, the voltage regulator circuit 2012 may further include a twenty-third resistor R56, a sixteenth resistor R53, and a seventh capacitor C43.

[0176] The first end of the sixteenth resistor R53 is connected to the first end of the seventh capacitor C43, and the second end is connected to the second end of the seventh capacitor C43.

[0177] The first end of the 23rd resistor R56 is connected to the first end of the 22nd resistor R55, and the second end is connected to the ground terminal SGND.

[0178] It is understood that the voltage regulator circuit 2012, including the seventeenth resistor R54, the eighteenth resistor R52, the eighth capacitor C45, the nineteenth resistor R50, the twentieth resistor R51, the second regulator U6A, the third regulator U4, and the twenty-second resistor R55, can stabilize the output voltage and adjust the working mode of the primary side when the output load changes.

[0179] Please refer to Figure 5 below. Figure 5 is a schematic diagram of the structure of an electrical parameter detection circuit in a power control circuit provided in an embodiment of this application.

[0180] In some optional implementations of this embodiment, the above-mentioned electrical parameter detection circuit includes an eighteenth resistor R167, a nineteenth resistor R168, a twentieth resistor R169, and a sixth capacitor C144.

[0181] The first terminal of the eighteenth resistor R167 is connected to the bus voltage input terminal, and the second terminal is connected to the first terminal of the nineteenth resistor R168.

[0182] The second terminal of the nineteenth resistor R168 mentioned above is connected to the ground terminal.

[0183] The first end of the twentieth resistor R169 is connected to the first end of the nineteenth resistor R168, and the second end is connected to the output of the signal conversion circuit.

[0184] The first end of the sixth capacitor C144 is connected to the output terminal of the signal conversion circuit, and the second end is connected to the ground terminal.

[0185] It is understandable that the electrical parameter detection circuit includes the eighteenth resistor R167, the nineteenth resistor R168, the twentieth resistor R169, and the sixth capacitor C144. Its signal 30V_check can be fed back to the power distribution circuit. When the output voltage is 30V, the MCU internally detects that the voltage is approximately 2.7V; when the output voltage rises to 32.5V, the MCU internally detects that the voltage is approximately 2.95V. By comparing the difference before and after, the temperature state of the temperature acquisition circuit can be determined, and the power distribution circuit can be adjusted to reduce power consumption, thereby meeting safety requirements.

[0186] The power control circuit provided in this application embodiment includes: a temperature acquisition circuit, a signal conversion circuit, an electrical parameter detection circuit, and a power distribution circuit. The signal conversion circuit is signal-connected to the temperature acquisition circuit and the electrical parameter detection circuit, respectively. The electrical parameter detection circuit is signal-connected to the power distribution circuit. The temperature acquisition circuit is used to: acquire a temperature signal corresponding to the power supply terminal; wherein the temperature signal represents the temperature of the temperature acquisition circuit when the temperature acquisition circuit is set within a first distance threshold range of the power supply terminal; the power supply terminal is used to provide power to the electrical equipment connected to the power distribution circuit; and transmit the temperature signal to the signal conversion circuit. The signal conversion circuit is used to: convert the temperature signal into an electrical parameter signal; and transmit the electrical parameter signal to the electrical parameter detection circuit. The electrical parameter detection circuit is used to: determine, based on the electrical parameter signal, whether the temperature of the temperature acquisition circuit is greater than or equal to a preset temperature threshold to obtain a determination result; and transmit the determination result to the power distribution circuit. The power distribution circuit is used to: determine the output power of the power distribution circuit based on the determination result, wherein the distance between the power distribution circuit and the power supply terminal is greater than the first distance threshold. Therefore, by separating the temperature acquisition circuit and the power distribution circuit, the volume of the end of the power control circuit connected to the electrical equipment can be reduced. The temperature acquisition circuit obtains the temperature signal corresponding to the power supply end, and the power distribution circuit uses it to determine the output power of the power distribution circuit based on whether the temperature indicated by the temperature signal is greater than or equal to a preset temperature threshold. Thus, the output power of the power distribution circuit can be matched with the temperature corresponding to the power supply end.

[0187] The embodiments of this application are described below by way of example. However, it should be noted that the embodiments of this application may have the features described below, but the following description does not constitute a limitation on the protection scope of the embodiments of this application.

[0188] For example, the device models, specifications, and electrical parameter values ​​shown in the attached diagram are merely illustrative. In practice, other models, specifications, and electrical parameter values ​​can also be used to design power control circuits.

[0189] Before introducing this plan, the concepts involved in the plan will be explained as follows:

[0190] NTC (Negative Temperature Coefficient) is a type of thermistor that works on the principle that its resistance decreases as the temperature rises.

[0191] LRL431AKLT1G: Adjustable precision parallel voltage regulator.

[0192] Optocoupler: Opto-isolator.

[0193] In related technologies, with the widespread use of multi-port chargers and the significant increase in the power of charging devices, the power of chargers has increased accordingly, and their size has also increased considerably, especially for desktop chargers, which look rather bulky.

[0194] In view of this, this solution provides a separate charging device to solve the above problems. The main method is that the AC (alternating current) to DC (direct current) converter is used as the connection part of the power supply (e.g., including the temperature acquisition circuit 10 and signal conversion circuit mentioned above). It is connected to the DC-DC part (e.g., including the electrical parameter detection circuit mentioned above) through a connecting cable and placed at a preset distance from the power supply (e.g., on a desktop). This effectively reduces the size of the desktop and makes the desktop look neater. Furthermore, the temperature acquisition circuit 10 can convert the temperature signal of the temperature acquisition circuit 10 into an electrical parameter signal, so that the DC-DC part can detect the temperature of the AC-DC part, and the temperature rise problem can be solved by reducing the power.

[0195] Referring to Figures 2B and 3B, the temperature sensing circuit 10 includes a first resistor R273, a second resistor R274, a first thermistor NTC2, a first capacitor C14, and a first voltage regulator U8. The first thermistor NTC2 detects the temperature of the internal components of the AC-DC converter (e.g., temperature sensing circuit 10). When the temperature of the components rises, the resistance of the first thermistor NTC2 decreases, causing a voltage divider between the first resistor R273 and the second resistor R274, which controls the first voltage regulator U8 (LRL431AKLT1G, adjustable precision parallel voltage regulator) to turn off, and vice versa. The third resistor R277, the fourth resistor R278, the fifth resistor R279, the sixth resistor R280, the seventh resistor R281, the second capacitor C52, the first transistor Q35, and the optocoupler's light-emitting side U21A form the control optocoupler U21 (corresponding to the optocoupler control circuit 2001 mentioned above). When the first regulator U8 is off, the voltage division of the third resistor R277, the fourth resistor R278, and the fifth resistor R279 causes the first transistor Q35 to conduct, which in turn causes the optocoupler's light-emitting side U21A to conduct, feeding the primary side signal back to the secondary side. The eighth resistor R275, the ninth resistor R276, and the third capacitor C23 form the positive feedback circuit 2002, which adjusts the operating hysteresis of the first regulator U8.

[0196] The 21st resistor R282, the 10th resistor R283, the 4th capacitor C54, the 2nd transistor Q34, the 11th resistor R285, the 5th capacitor C53, the optocoupler's light-receiving side U21B, and the 12th resistor R284 form the secondary side signal receiving circuit (corresponding to the above signal receiving circuit 2011). When the optocoupler's light-receiving side U21B is turned on, the 1st transistor Q35 will be turned on. The 12th resistor R284, the 1st transistor Q35, and the 11th resistor R285 will divide the voltage, causing AC_NTC to generate a high voltage, approximately 21V.

[0197] The sixteenth resistor R53, the seventeenth resistor R54, the seventh capacitor C43, the eighteenth resistor R52, the eighth capacitor C45, the nineteenth resistor R50, the twentieth resistor R51, the second voltage regulator U6A, the third voltage regulator U4, the twenty-second resistor R55, and the twenty-third resistor R56 constitute the secondary-side voltage regulator circuit (i.e., the voltage regulator circuit 2012 mentioned above). Its main function is to stabilize the output voltage. When the output load changes, it adjusts the working mode of the primary-side circuit of the optocoupler, for example, determining the output waveform and frequency of the primary-side circuit of the optocoupler according to the load size. The thirteenth resistor R44, the fourteenth resistor R48, the fifteenth resistor R286, and the third transistor Q36 form a fine-tuning output voltage circuit (i.e., the voltage output circuit 2013 mentioned above). When AC_NTC is high, the third transistor Q36 is turned on, and the fifteenth resistor R286 is connected in parallel with the resistor R55, thereby increasing the output voltage from the previous rated voltage of 30V to about 32.5V. The AC-DC and DC-DC are connected by a line. Since the output voltage of the AC-DC is increased, the input voltage of the DC-DC also becomes higher.

[0198] In addition to the temperature acquisition circuit and signal conversion circuit structures and connections shown in Figures 2A, 2B, 3A, and 3B, other methods can be used to implement the temperature acquisition circuit and signal conversion circuit. For example, the structure and connections shown in Figure 4A or 4B can also be used to implement the temperature acquisition circuit and signal conversion circuit.

[0199] Referring to Figure 5, the eighteenth resistor R167, the nineteenth resistor R168, the twentieth resistor R169, and the sixth capacitor C144 constitute the DC-DC input voltage detection circuit (i.e., the aforementioned electrical parameter detection circuit). Its signal 30V_check is fed back to the MCU (Microcontroller Unit) (e.g., the aforementioned power distribution circuit). When the output voltage is 30V, the MCU detects that its voltage is approximately 2.7V. When the output voltage rises to 32.5V, the MCU detects that its voltage is approximately 2.95V. By comparing the difference before and after, a temperature state of the AC-DC section can be determined, and the DC-DC power distribution can be adjusted to achieve a power reduction purpose, thereby meeting safety requirements.

[0200] It should be noted that, in addition to the contents described above, this embodiment may also include the technical features described in the above embodiments, thereby achieving the technical effects of the power control circuit shown above. Please refer to the above description for details. For the sake of brevity, it will not be elaborated here.

[0201] The power control circuit provided in this application embodiment is adaptable to separate desktop chargers, bulky and ultra-thin products, such as power strips. It eliminates the need for additional signal lines, reduces the diameter of the output lines, lowers design complexity, reduces costs, and improves user experience. The circuit is simple, reliable, easy to debug, and economical. Furthermore, it solves the delivery problem between separate chargers. The temperature status of the AC-DC section is determined by adjusting the VBUS voltage and detecting the difference.

[0202] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0203] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A power control circuit, wherein, The power control circuit comprises a temperature acquisition circuit, a signal detection circuit and a power distribution circuit, the signal detection circuit is respectively connected with the temperature acquisition circuit and the power distribution circuit in signal, wherein: The temperature acquisition circuit is used for acquiring a temperature signal corresponding to a power supply end, the temperature signal representing a temperature of the temperature acquisition circuit in a case that the temperature acquisition circuit is arranged within a first distance threshold range of the power supply end, the power supply end being used for providing power supply for an electric device connected with the power distribution circuit; and the temperature signal is transmitted to the signal detection circuit; The signal detection circuit is used for determining whether the temperature of the temperature acquisition circuit is greater than or equal to a preset temperature threshold to obtain a determination result; and the determination result is transmitted to the power distribution circuit; The power distribution circuit is used for determining an output power of the power distribution circuit based on the determination result, wherein a distance between the power distribution circuit and the power supply end is greater than the first distance threshold.

2. The power control circuit of claim 1, wherein, The temperature acquisition circuit comprises a first resistor, a second resistor, a first thermistor, a first capacitor and a first voltage stabilizer; A first end of the first resistor is connected with the power supply end, and a second end of the first resistor is connected with a first end of the second resistor; A second end of the second resistor is connected with a ground end; A first end of the first thermistor is connected with the first end of the second resistor, and a second end of the first thermistor is connected with a second end of the second resistor; A first end of the first capacitor is connected with the first end of the second resistor, and a second end of the first capacitor is connected with the second end of the second resistor; A first end of the first voltage stabilizer is connected with the first end of the second resistor, a second end of the first voltage stabilizer is connected with the second end of the second resistor, and a third end of the first voltage stabilizer is connected with the signal detection circuit.

3. The power control circuit of claim 2, wherein, The signal detection circuit comprises a signal conversion circuit; The signal conversion circuit is connected with the temperature acquisition circuit in signal.

4. The power control circuit of claim 3, wherein, The signal detection circuit further comprises an electric parameter detection circuit; The electric parameter detection circuit is connected with the signal conversion circuit and the power distribution circuit in signal.

5. The power control circuit of claim 4, wherein, The signal conversion circuit comprises a light coupling primary side circuit and a light coupling secondary side circuit; An input end of the light coupling primary side circuit is connected with an output end of the temperature acquisition circuit, and an output end of the light coupling primary side circuit is connected with an input end of the light coupling secondary side circuit; An output end of the light coupling secondary side circuit is connected with an input end of the electric parameter detection circuit.

6. The power control circuit of claim 5, wherein, The light coupling primary side circuit comprises a light coupling control circuit; The light coupling control circuit is connected with the light coupling secondary side circuit in signal.

7. The power control circuit of claim 6, wherein, The light coupling primary side circuit further comprises a positive feedback circuit; The positive feedback circuit is connected with the light coupling control circuit and the temperature acquisition circuit.

8. [Amended according to Rule 26 24.07.2025] The power control circuit according to claim 7, wherein: In a case that the first voltage stabilizer is turned off, the light coupling control circuit is used for controlling the temperature acquisition circuit to transmit an output signal of the light coupling primary side circuit to the light coupling secondary side circuit.

9. The power control circuit according to claim 7, wherein: The positive feedback circuit is used for adjusting a working return difference of the first voltage stabilizer.

10. The power control circuit of claim 7, wherein, The light coupling control circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first triode and a light coupling light-emitting side; The first end of the third resistor is connected to the first end of the sixth resistor, and the second end is connected to the first end of the fourth resistor; The second end of the fourth resistor is connected to the first end of the fifth resistor; The second end of the fifth resistor is connected to the temperature acquisition circuit; The second end of the sixth resistor is connected to the first end of the light coupling light-emitting side; The second end of the light coupling light-emitting side is connected to the first end of the first triode; The second end of the first triode is connected to the first end of the fifth resistor, and the third end is connected to the second end of the fifth resistor; The first end of the seventh resistor is connected to the first end of the light coupling light-emitting side, and the second end is connected to the positive feedback circuit; The second end of the light coupling light-emitting side is connected to the positive feedback circuit.

11. The power control circuit of claim 7, wherein, The positive feedback circuit comprises a ninth resistor; The first end of the ninth resistor is connected to the temperature acquisition circuit, and the second end is connected to the light coupling control circuit.

12. The power control circuit of claim 10, wherein, The light coupling secondary side circuit comprises a signal receiving circuit and a voltage output circuit; The signal receiving circuit is connected to the voltage output circuit.

13. The power control circuit of claim 12, wherein, The light coupling secondary side circuit further comprises a voltage stabilizing circuit; The voltage stabilizing circuit is connected to the signal receiving circuit and the voltage output circuit respectively.

14. The power control circuit of claim 13, wherein: In the case that the light coupling light-emitting side is turned on, the signal receiving circuit is configured to generate a first voltage, wherein the first voltage is greater than or equal to a first voltage threshold.

15. The power control circuit of claim 14, wherein: The voltage stabilizing circuit is configured to stabilize the output voltage of the voltage output circuit.

16. The power control circuit of claim 14, wherein: In the case that the signal receiving circuit generates the first voltage, the voltage output circuit outputs a second voltage, wherein the second voltage is greater than or equal to a second voltage threshold.

17. The power control circuit of claim 12, wherein, The signal receiving circuit comprises a twenty-first resistor, a tenth resistor, a fourth capacitor, a second triode, an eleventh resistor, a fifth capacitor and a light coupling light-receiving side; The first end of the twenty-first resistor is connected to the first end of the tenth resistor, and the second end is connected to the first end of the second triode; The first end of the fourth capacitor is connected to the first end of the tenth resistor, and the second end is connected to the second end of the tenth resistor; The second end of the second triode is connected to the second end of the tenth resistor, and the third end is connected to the first end of the eleventh resistor; The first end of the fifth capacitor is connected to the first end of the eleventh resistor, and the second end is connected to the second end of the eleventh resistor; The first end of the light coupling light-receiving side is connected to the second end of the second triode, and the second end is connected to a ground end.

18. The power control circuit of claim 12, wherein, The voltage output circuit comprises a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and a third triode; The first end of the thirteenth resistor is an output end of the voltage output circuit, and the second end is connected to the first end of the fourteenth resistor; The first end of the third triode is connected to the first end of the fifteenth resistor, the second end is connected to a ground end, and the third end is connected to the second end of the fourteenth resistor.

19. The power control circuit of claim 13, wherein, The voltage stabilizing circuit comprises a seventeenth resistor, an eighteenth resistor, an eighth capacitor, a nineteenth resistor, a twentieth resistor, a second voltage stabilizer, a third voltage stabilizer and a twenty-second resistor; The first end of the seventeenth resistor is connected with the signal receiving circuit, and the second end is connected with the first end of the eighteenth resistor; The second end of the eighteenth resistor is connected with the second end of the eighth capacitor; The first end of the eighth capacitor is connected with the second end of the twentieth resistor; The first end of the twentieth resistor is connected with the second end of the nineteenth resistor; The first end of the nineteenth resistor is connected with the signal receiving circuit; The first end of the second voltage stabilizer is connected with the first end of the twentieth resistor, and the second end is connected with the second end of the twentieth resistor; The first end of the third voltage stabilizer is connected with the first end of the eighth capacitor, the second end is connected with the ground, and the third end is connected with the first end of the twenty-second resistor; The second end of the twenty-second resistor is connected with the ground.

20. The power control circuit of one of claims 1-19, wherein, The electric parameter detecting circuit comprises an eighteenth resistor, a nineteenth resistor, a twentieth resistor and a sixth capacitor; The first end of the eighteenth resistor is connected with the bus voltage input end, and the second end is connected with the first end of the nineteenth resistor; The second end of the nineteenth resistor is connected with the ground; The first end of the twentieth resistor is connected with the first end of the nineteenth resistor, and the second end is connected with the output end of the signal converting circuit; The first end of the sixth capacitor is connected with the output end of the signal converting circuit, and the second end is connected with the ground.

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