Power supply module, integrated circuit, power supply and equipment

Abstract

The invention discloses a power supply module, an integrated circuit, a power supply and equipment. Wherein the power supply module comprises a first switching circuit, a second switching circuit, a switching control circuit, a second switching control circuit, a third switching control circuit, a fourth switching control circuit, a fifth switching control circuit and a sixth switching control circuit, the switch control circuit is used for controlling the first switch circuit to select the first power supply or the second power supply. The first input end of the second switch circuit is electrically connected with a first power supply, the second input end is electrically connected with a second power supply, and the output end is electrically connected with the second power supply end of the switch control circuit. The second switch circuit is used for enabling a second power supply end of the switch control circuit to receive power supplied by at least one of the first power supply and the second power supply when the power supply module is not powered on; and after the power supply module is powered on, the electric connection between the second power supply end of the switch control circuit and the target power supply is cut off. The target power supply comprises the power supply selected by the first switching circuit in the first power supply and the second power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of power supplies, and particularly to a power supply module, an integrated circuit, a power supply, and a device. Background Art

[0002] A dual power supply means that the same device has two input power supplies. When one of the power supplies is cut off, the circuit combining switch of the device will automatically switch to the other power supply to continue power supply, thereby preventing the device from losing power. In order to enable the circuit combining switch to automatically switch to the other input power supply when one power supply is cut off. Among the two input power supplies, each input power supply supplies power to the main circuit through the circuit combining switch and supplies power to the circuit combining switch controller through a branch circuit connected to the front end of the circuit combining switch, so as to prevent the circuit combining switch from being unable to switch due to power failure. In order to ensure that the circuit combining switch controller can always obtain a power supply, the branch circuit needs to be connected to the front end of the circuit combining switch, which results in: the EMI (Electromagnetic Interference) filter circuit inside the power supply module does not have a filtering effect on the branch circuit. Therefore, an EMI rate circuit needs to be separately configured for the branch circuit.

[0003] This causes problems such as large board area occupied by the branch circuit, low space utilization rate, and high power consumption. Summary of the Invention

[0004] The purpose of the present invention is to provide a power supply circuit, a circuit, and a device to solve the problems of large board area occupied by the auxiliary power supply part, low space utilization rate, and high power consumption in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a power supply module, including: a first switch circuit, a switch control circuit, and a second switch circuit. Among them, the first input end of the first switch circuit is used to externally connect a first power supply, and the second input end of the first switch circuit is used to externally connect a second power supply. The output end of the first switch circuit is electrically connected to the first power supply end of the switch control circuit, and the switch control circuit is used to control the first switch circuit to select the first power supply or the second power supply. The first input end of the second switch circuit is used to be electrically connected to the first power supply, the second input end of the second switch circuit is used to be electrically connected to the second power supply, and the output end of the second switch circuit is electrically connected to the second power supply end of the switch control circuit. The second switch circuit is used to enable at least one of the first power supply and the second power supply to supply power to the second power supply end of the switch control circuit when the power supply module is not powered on. The second switch circuit is further used to disconnect the electrical connection between the second power supply end of the switch control circuit and the target power supply after the power supply module is powered on. The target power supply includes the power supply selected by the first switch circuit from the first power supply and the second power supply.

[0006] In this embodiment, the first switching circuit is used to select a power supply, the second switching circuit is used to use the first power supply or the second power supply as an auxiliary power supply to supply power to the switching control circuit, and the switching control circuit is used to control the first switching circuit to select the first power supply or the second power supply. At the same time, after the power module is powered on, the switching control circuit and the power supply selected by the switched control circuit can be disconnected through the second switching circuit. It can be understood that after the first switching circuit selects the first power supply or the second power supply as the power-on power supply of the power module, the power-on power supply and the switching control circuit are in an electrically insulated state. Therefore, the second switching circuit will not cause electromagnetic interference to the input signal of the main circuit, so that the EMI filtering circuit for the second switching circuit can be omitted, thus saving power consumption, board area, and improving space utilization.

[0007] In an implementation manner of the first aspect, the power module further includes: a power conversion circuit. The output end of the second switching circuit is electrically connected to the second power supply end of the switching control circuit through the power conversion circuit. The input end of the power conversion circuit is electrically connected to the output end of the second switching circuit, and the output end of the power conversion circuit is electrically connected to the second power supply end of the switching control circuit. The power conversion circuit is used to convert the received power supply voltage into the working voltage of the switching control circuit.

[0008] In this implementation manner, the electrical connection between the second switching circuit and the switching control circuit through the power conversion circuit enables the switching control circuit to control the first switch to complete the selection of the power supply under the working voltage, thus ensuring the electrical safety of the switching control circuit.

[0009] In an implementation manner of the first aspect, the output end of the second switching circuit includes a first output end and a second output end. The first output end of the second switching circuit is used to output the power supply voltage of the first power supply, and the second output end of the second switching circuit is used to output the power supply voltage of the second power supply. The power conversion circuit includes a first sub-power conversion circuit and a second sub-power conversion circuit. The input end of the first sub-power conversion circuit is electrically connected to the first output end of the second switching circuit, the input end of the second sub-power conversion circuit is electrically connected to the second output end of the second switching circuit, the output end of the first sub-power conversion circuit is electrically connected to the second power supply end of the switching control circuit, and the output end of the second sub-power conversion circuit is electrically connected to the second power supply end of the switching control circuit.

[0010] In this implementation, the power supply voltage of the first power supply is converted into the operating voltage of the switch control circuit via the first sub-power supply conversion circuit, and the power supply voltage of the second power supply is converted into the operating voltage of the switch control circuit via the second sub-power supply conversion circuit. That is, the two input power supplies are respectively converted into the operating voltage of the switch control circuit through their respective corresponding power supply conversion circuits. This independent design can maintain the independent relationship between the two input power supplies, thus ensuring electrical safety. At the same time, this independent design can also make the two input power supplies exist as auxiliary power supplies for each other, so as to ensure that the switch control circuit can have a power supply to control the first switch circuit to select the first power supply or the second power supply.

[0011] In one implementation of the first aspect, the second switch circuit is further configured to, after the power supply module is powered on, disconnect the electrical connection between the second power supply terminal of the switch control circuit and the first power supply, and disconnect the electrical connection between the second power supply terminal of the switch control circuit and the second power supply.

[0012] In this implementation, through the second switch circuit, it can be achieved that after the power supply module is powered on, the electrical connection between the second power supply terminal of the switch control circuit and the two input power supplies is disconnected, thereby realizing the insulation isolation between the second power supply terminal of the switch control circuit and the front end of the first switch circuit, thus avoiding the second switch circuit from generating interference signals to the main circuit, eliminating the need to configure an EMI circuit for the second switch circuit, and finally achieving the technical purposes of saving power consumption, reducing the board area occupied by the power supply module, and improving the space utilization rate.

[0013] In one implementation of the first aspect, the switch control circuit is configured to control the second switch circuit to maintain the first state when the power supply module is not powered on. When the second switch circuit maintains the first state, the second power supply terminal of the switch control circuit receives power supply from at least one of the first power supply and the second power supply. And / or, the switch control circuit is configured to control the second switch circuit to maintain the second state when the power supply module is powered on. When the second switch circuit maintains the second state, the electrical connection between the second power supply terminal of the switch control circuit and the target power supply is disconnected.

[0014] In this implementation, the switch control circuit is further configured to control the second switch circuit. Therefore, the integration of the control circuit of the first switch circuit and the control circuit of the second switch circuit is realized, further saving the board area occupied by the power supply module.

[0015] In one implementation of the first aspect, the second switch circuit includes: a normally closed relay switch; the first input terminal of the normally closed relay switch is used for electrical connection to the first power supply, the second input terminal of the normally closed relay switch is used for electrical connection to the second power supply, the output terminal of the normally closed relay switch is electrically connected to the second power supply terminal of the switch control circuit, and the control terminal of the normally closed relay switch is electrically connected to the switch control circuit.

[0016] In this implementation mode, after the power supply module is powered on, an electrical insulation state is achieved between the target power supply and the second power supply terminal of the switch control circuit through a normally closed relay switch. The normally closed relay is low-cost and easy to control, and can well achieve the technical purpose.

[0017] In one implementation mode of the first aspect, the normally closed relay switch includes: a first switch, a second switch and a control coil. Among them, the input end of the first switch is used to be electrically connected to the first power supply, and the output end of the first switch is electrically connected to the second power supply terminal of the switch control circuit. The input end of the second switch is used to be electrically connected to the second power supply, and the output end of the second switch is electrically connected to the second power supply terminal of the switch control circuit. The control coil is electrically connected to the output end of the switch control circuit, and the control coil is used to control the opening or closing of the first switch and the second switch.

[0018] In this implementation mode, the normally closed relay includes a first switch and a second switch. The first switch is used to supply power from the first power supply to the second power supply terminal of the switch control circuit, and the second switch is used to supply power from the second power supply to the second power supply terminal of the switch control circuit. That is, the normally closed relay including the first switch and the second switch enables the first power supply and the second power supply to independently supply power to the second power supply terminal of the switch control circuit respectively, thus ensuring the independence of the first power supply and the second power supply, and ultimately ensuring electrical safety.

[0019] In one implementation mode of the first aspect, the control coil is used to control the simultaneous opening or simultaneous closing of the first switch and the second switch.

[0020] In this implementation mode, the control coil controls the synchronization of the first switch and the second switch, which can reduce the implementation difficulty and save costs.

[0021] In one implementation mode of the first aspect, the control coil includes a first sub-control coil and a second sub-control coil. The first sub-control coil is used to control the opening or closing of the first switch, and the second sub-control coil is used to control the opening or closing of the second switch.

[0022] This implementation mode realizes the independent control of the first switch and the second switch. For example, when the first sub-control coil fails, the second switch can still continue to work under the control of the second sub-control coil, so as to ensure that the second power supply terminal of the switch control circuit can receive the power voltage of the second power supply output by the second switch, and ensure the normal operation of the switch control circuit.

[0023] In one implementation mode of the first aspect, the second switch circuit includes a first output end and a second output end. The second power supply terminal of the switch control circuit includes a first sub-power supply terminal and a second sub-power supply terminal. The first sub-power supply terminal is electrically connected to the first output end of the second switch circuit, and the second sub-power supply terminal is electrically connected to the second output end of the second switch circuit.

[0024] In this implementation manner, each output terminal of the second switch circuit is configured with a corresponding sub-power supply terminal. When the power supply module is not powered on, if one of the sub-power supply terminals fails, the other sub-power supply terminal can still supply power to the switch control circuit. Therefore, each output terminal of the second switch circuit being configured with a corresponding sub-power supply terminal can effectively reduce the probability of the switch control circuit losing power due to a failure of the sub-power supply terminal.

[0025] In a second aspect, an integrated circuit provided by an embodiment of the present application includes the power supply module of the first aspect. This integrated circuit can reduce power consumption and can eliminate the EMI filter circuit of the second switch circuit, saving the occupied space of the power supply module.

[0026] In a third aspect, a power supply provided by an embodiment of the present application includes the power supply module of the first aspect or the integrated circuit of the second aspect. This power supply can reduce power consumption and can eliminate the EMI filter circuit of the second switch circuit, saving the occupied space of the power supply module.

[0027] In a fourth aspect, a device provided by an embodiment of the present application includes the power supply module of the first aspect, or the integrated circuit of the second aspect, or the power supply of the third aspect. This device can reduce power consumption and can eliminate the EMI circuit of the auxiliary power supply, saving the occupied space of the power supply module and improving space utilization.

[0028] Compared with the prior art, in view of the problem that the branch circuit will generate interference signals to the subsequent circuit when the power supply circuit is working, the present application can, through the second switch circuit, make the second power supply terminal of the switch control circuit and the target power supply insulated from each other after the power supply module is powered on. The specific implementation process is as follows: when the switch control circuit controls the first switch circuit to select the first power supply, after the power supply module is powered on, the second switch circuit makes the second power supply terminal of the switch control circuit electrically insulated from the first power supply; when the switch control circuit controls the first switch circuit to select the second power supply, after the power supply module is powered on, the second switch circuit makes the second power supply terminal of the switch control circuit electrically insulated from the second power supply, so that the power consumption of the power supply module can be reduced. The present invention realizes the electrical insulation between the second power supply terminal of the switch control circuit and the target power supply after the power supply module is powered on, thereby fundamentally eliminating the interference of the interference signals generated by the second switch circuit to the input signal of the power supply module. Therefore, the power supply module provided by the present invention may not be provided with an EMI filter circuit in the second switch circuit, thereby saving the board area of the power supply module and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of a power supply module when it is not powered on provided by an embodiment of the present application; a schematic structural diagram of a power supply circuit when there is an electrical input in a power supply receiving unit;

[0030] Figure 2 It is a schematic diagram when the power supply module is powered on provided by an embodiment of the present application;

[0031] Figure 3 It is a schematic diagram when the power supply module is powered on provided by an embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of a power supply module provided by an embodiment of the present application;

[0033] Figure 5 It is a schematic diagram of a power supply module provided by an embodiment of the present application;

[0034] Figure 6 It is a schematic diagram of a power supply module provided by an embodiment of the present application;

[0035] Figure 7 It is a schematic diagram of a power supply module provided by an embodiment of the present application.

[0036] Explanation of reference numerals:

[0037] 100, power supply module; 110, first switch circuit; 111, first input terminal; 112, second input terminal; 113, output terminal; 120, switch control circuit; 121, first power supply terminal of the switch control circuit; 122, second power supply terminal of the switch control circuit; 130, second switch circuit; 140, normally closed relay switch; 141, first switch; 1411, first sub-switch; 142, second switch; 1421, second sub-switch; 143, control coil; 143a, first sub-control coil; 143b, second sub-control coil; 150, power conversion circuit; 151, first sub-power conversion circuit; 152, second sub-power conversion circuit; 160, main power conversion circuit. Detailed implementation manners

[0038] The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0039] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0040] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0041] It should be understood that the term "and / or" used herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0042] Before specifically introducing the embodiments of the present application, the technical problems existing in the prior art will be further explained first.

[0043] In the existing power supply module, the two input power supplies are undifferentiated input power supplies, that is, there is no priority limit between the two input power supplies. When both power supplies are powered, either one can be used to supply power to the main circuit. This results in that any one of the two input power supplies always needs to be used as the auxiliary power supply of the other input power supply to supply power to the combining switch controller. For example, among the two input power supplies, one is used to supply power to the main circuit, and this power supply simultaneously serves as the auxiliary power supply of the other input power supply to supply power to the combining switch controller. That is, on the one hand, this power supply supplies power to the main circuit through the combining switch, and at the same time, it also needs to supply power to the combining switch controller through a branch circuit connected before the combining switch. For example, when A supplies power to the main circuit, A simultaneously serves as the auxiliary power supply of B to supply power to the combining switch controller. When A serves as the auxiliary power supply of B, since the EMI filtering circuit of the main circuit cannot filter the part of A serving as the auxiliary power supply of B (i.e., the branch circuit), it is necessary to separately configure an EMI filtering circuit for the part of A serving as the auxiliary power supply of B to prevent interference signals generated to the input power supply. Similarly, when B supplies power to the main circuit, B simultaneously serves as the auxiliary power supply of A to supply power to the combining switch controller, and it is necessary to separately configure an EMI filtering circuit for the part of B serving as the auxiliary power supply of A (i.e., the branch circuit) to prevent interference signals generated to the input power supply. This thus causes problems such as a large board area occupied by the branch circuit and low space utilization.

[0044] In addition, when both of the two input power supplies are powered, any one of the two input power supplies simultaneously serves as the auxiliary power supply of the other to supply power to the combining switch controller, which will thus generate a large amount of power consumption, and the separately configured EMI circuit will also generate power consumption. Therefore, the existing power supply module causes the problem of high power consumption of the branch circuit.

[0045] Such as Figures 1 to 3As shown in the figure, an embodiment of the present application provides a power supply module 100, which includes: a first switch circuit 110, a switch control circuit 120, and a second switch circuit 130. Among them, the first input terminal 111 of the first switch circuit is used to externally connect a first power supply A, and the second input terminal 112 of the first switch circuit is used to externally connect a second power supply B. The output terminal 113 of the first switch circuit is electrically connected to the first power supply terminal 121 of the switch control circuit. The switch control circuit 120 is used to control the first switch circuit 110 to select the first power supply A or the second power supply B. The first input terminal of the second switch circuit 130 is used to be electrically connected to the first power supply A, the second input terminal of the second switch circuit 130 is used to be electrically connected to the second power supply B, and the output terminal of the second switch circuit 130 is electrically connected to the second power supply terminal 122 of the switch control circuit. The second switch circuit 130 is used to enable the second power supply terminal 122 of the switch control circuit to receive at least one of the first power supply A and the second power supply B when the power supply module 100 is not powered on. The second switch circuit 130 is further used to disconnect the electrical connection between the second power supply terminal 122 of the switch control circuit and the target power supply after the power supply module 100 is powered on. The target power supply includes the power supply selected by the first switch circuit 110 from the first power supply A and the second power supply B.

[0046] In this embodiment, the power supply module 100 not being powered on means that: there is no voltage output at the output terminal 113 of the first switch circuit. When the first input terminal 111 and / or the second input terminal 112 of the first switch circuit are connected to a power supply, but the output terminal 113 of the first switch circuit is electrically insulated from the first input terminal 111 and the second input terminal 112 of the first switch circuit respectively, it is regarded that the power supply module 100 is not powered on. The power supply module 100 being powered on means that: the output terminal 113 of the first switch circuit can output the power supply voltage of the first power supply A or the power supply voltage of the second power supply B. That is, when at least one of the first power supply A and the second power supply B is powered on, the output terminal 113 of the first switch circuit is in an electrically connected state with the first input terminal 111 or the second input terminal of the first switch circuit. The first switch circuit 110 selecting the first power supply A or the second power supply B means that: the output terminal 113 of the first switch circuit selects to output the power supply voltage of the first power supply A or the power supply voltage of the second power supply B; that is, when the output terminal 113 of the first switch circuit is electrically connected to the first input terminal 111 of the first switch circuit, it means that the first switch circuit 110 selects the first power supply A; when the output terminal 113 of the first switch circuit is electrically connected to the second input terminal 112 of the first switch circuit, it means that the first switch circuit 110 selects the second power supply B. The power supply selected by the first switch circuit 110 from the first power supply A and the second power supply B is: among the first power supply A and the second power supply B, the power supply electrically connected to the output terminal of the first switch circuit 110. It can be understood that the power supply selected by the first switch circuit 110 from the first power supply A and the second power supply B is the power supply for powering on the power supply module. In a possible implementation manner, the target power supply powers on the power supply module.

[0047] It should be noted that in the embodiments of the present application, at the same moment, the switch control circuit 120 controls the output end 113 of the first switch circuit to be electrically connected to only one of the first input end 111 and the second input end 112 of the first switch circuit. That is, when the output end 113 of the first switch circuit is electrically connected to the first input end 111 of the first switch circuit, the output end 113 of the first switch circuit is electrically insulated from the second input end 112 of the first switch circuit. When the output end 113 of the first switch circuit is electrically connected to the second input end 112 of the first switch circuit, the output end 113 of the first switch circuit is electrically insulated from the first input end 111 of the first switch circuit.

[0048] In this embodiment, the first switch circuit 110 is used to select a power supply, the second switch circuit 130 is used to implement the first power supply A or the second power supply B as an auxiliary power supply to supply power to the switch control circuit 120, and the switch control circuit 120 is used to control the first switch circuit 110 to select the first power supply A or the second power supply B. At the same time, after the power module 100 is powered on, the switch control circuit 120 can be disconnected from the power supply selected by the switch control circuit 120 through the second switch circuit 130. It can be understood that after the first switch circuit 110 selects the first power supply A or the second power supply B as the power-on power supply of the power module 100, the power-on power supply is in an electrically insulated state from the switch control circuit 120. Therefore, the second switch circuit 130 will not cause electromagnetic interference to the input signal of the main circuit, so that the EMI filter circuit for the second switch circuit 130 can be omitted, thereby saving power consumption, board area, and improving space utilization.

[0049] In an implementation manner of this embodiment, the second switch circuit 130 is used to electrically connect the second power supply end 122 of the switch control circuit to the first input end and the second input end of the second switch circuit 130 when the power module 100 is not powered on.

[0050] As Figure 4 shown, in an embodiment of the present application, the power module 100 further includes: a power conversion circuit 150. The output end of the second switch circuit 130 is electrically connected to the second power supply end 122 of the switch control circuit through the power conversion circuit 150. The input end of the power conversion circuit 150 is electrically connected to the output end of the second switch circuit 130, and the output end of the power conversion circuit 150 is electrically connected to the second power supply end 122 of the switch control circuit. The power conversion circuit 150 is used to convert the received power supply voltage into the working voltage of the switch control circuit 120.

[0051] In this embodiment, when the second switching circuit 130 outputs the power supply voltage of the first power supply A and / or the power supply voltage of the second power supply B, and when the power supply conversion circuit 150 receives the power supply voltage of the first power supply A and / or the power supply voltage of the second power supply B, the received power supply voltage can be converted into a target voltage, and the target voltage is transmitted to the second power supply terminal 122 of the switch control circuit, thereby realizing providing the target voltage to the second power supply terminal 122 of the switch control circuit. The target voltage is the operating voltage of the switch control circuit 120. Therefore, the power supply conversion circuit 150 can enable the switch control circuit 120 to operate under the operating voltage, ensuring the power consumption safety of the switch control circuit 120. In one implementation, the power supply conversion circuit includes at least one of an AC-DC circuit and a DC-DC circuit, and which specific power supply conversion circuits include an AC-DC circuit and a DC-DC circuit can be determined based on actual requirements. For example, when the first power supply and the second power supply are alternating currents respectively, the power supply conversion circuit 150 includes at least an AC-DC circuit. If the first power supply and the second power supply are direct currents respectively, the power supply conversion circuit 150 includes at least a DC-DC circuit.

[0052] In this embodiment, the second switching circuit 130 is electrically connected to the switch control circuit 120 through the power supply conversion circuit 150, which can enable the switch control circuit 120 to control the selection of the power supply by the first switch 141 under the operating voltage, thereby ensuring the power consumption safety of the switch control circuit 120.

[0053] As Figure 5 shown, in an embodiment of the present application, the output terminal of the second switching circuit 130 includes a first output terminal and a second output terminal. The first output terminal of the second switching circuit 130 is used to output the power supply voltage of the first power supply A, and the second output terminal of the second switching circuit 130 is used to output the power supply voltage of the second power supply B. The power supply conversion circuit 150 includes a first sub-power supply conversion circuit 151 and a second sub-power supply conversion circuit 152. The input terminal of the first sub-power supply conversion circuit 151 is electrically connected to the first output terminal of the second switching circuit 130, the input terminal of the second sub-power supply conversion circuit 152 is electrically connected to the second output terminal of the second switching circuit 130, the output terminal of the first sub-power supply conversion circuit 151 is electrically connected to the second power supply terminal 122 of the switch control circuit, and the output terminal of the second sub-power supply conversion circuit 152 is electrically connected to the second power supply terminal 122 of the switch control circuit.

[0054] In one implementation of this embodiment, the input end of the second switch circuit 130 includes a first input end and a second input end. The first input end of the second switch circuit 130 is used for electrically connecting to the first power supply A, and the second input end of the second switch circuit 130 is used for electrically connecting to the second power supply B. In a possible implementation, a switch is provided between the first input end and the first output end of the second switch circuit 130, and this switch is used to realize the electrical connection or electrical insulation between the first input end and the first output end of the second switch circuit 130. A switch is provided between the second input end and the second output end of the second switch circuit 130, and this switch is used to realize the electrical connection or electrical insulation between the second input end and the second output end of the second switch circuit 130. The power supply voltage of the first power supply A is transmitted to the second power supply end 122 of the switch control circuit through the first input end and the first output end of the second switch circuit 130, so as to supply power to the switch control circuit 120. The power supply voltage of the second power supply B is transmitted to the second power supply end 122 of the switch control circuit through the second input end and the second output end of the second switch circuit 130, so as to supply power to the switch control circuit 120.

[0055] In this embodiment, after receiving the power supply voltage of the first power supply A, the second switch circuit 130 outputs it from the first output end of the second switch circuit 130 to the first sub-power conversion circuit 151. The power supply voltage of the first power supply A is converted into a target voltage by the first sub-power conversion circuit 151 and output to the second power supply end 122 of the switch control circuit, so as to supply power to the second power supply end 122 of the switch control circuit.

[0056] In this embodiment, the power supply voltage of the first power supply A is converted into the operating voltage of the switch control circuit 120 by the first sub-power conversion circuit 151, and the power supply voltage of the second power supply B is converted into the operating voltage of the switch control circuit 120 by the second sub-power conversion circuit 152. That is, the two input power supplies are respectively converted into the operating voltage of the switch control circuit 120 through their respective corresponding power conversion circuits 150. This independent design can realize the independent relationship between the two input power supplies, thus ensuring electrical safety. At the same time, this independent design can also make the two input power supplies exist as auxiliary power supplies for each other, so as to ensure that the switch control circuit 120 can have a power supply to control the first switch circuit 110 to select the first power supply A or the second power supply B.

[0057] Such as Figure 6As shown, in an embodiment of the present application, the power supply module 100 further includes: a power conversion circuit 150. The input end of the power conversion circuit 150 includes a first input end and a second input end. Among them, the first input end of the power conversion circuit 150 is used for electrically connecting to the first power supply A, and the second input end of the power conversion circuit 150 is used for electrically connecting to the second power supply B. The output end of the power conversion circuit 150 includes a first output end and a second output end. The first output end of the power conversion circuit 150 is electrically connected to the first input end of the second switch circuit 130, and the second output end of the power conversion circuit 150 is electrically connected to the second input end of the second switch circuit 130. The power conversion circuit 150 is used for converting the received power supply voltage into the operating voltage of the switch control circuit 120.

[0058] In this embodiment, the first input end of the second switch circuit 130 is used for electrically connecting to the first power supply A through the first input end of the power conversion circuit 150, and the second input end of the second switch circuit 130 is used for electrically connecting to the second power supply B through the second input end of the power conversion circuit 150.

[0059] In this embodiment, when the second switch circuit 130 outputs the power supply voltage of the first power supply A and / or the power supply voltage of the second power supply B, and when the power conversion circuit 150 receives the power supply voltage of the first power supply A and / or the power supply voltage of the second power supply B, it can convert the received power supply voltage into a target voltage and transmit the target voltage to the second power supply terminal 122 of the switch control circuit, thereby realizing providing the target voltage to the second power supply terminal 122 of the switch control circuit. The target voltage is the operating voltage of the switch control circuit 120. Therefore, the power conversion circuit 150 can enable the switch control circuit 120 to operate at the operating voltage, ensuring the power consumption safety of the switch control circuit 120.

[0060] In an embodiment of the present application, the output end of the second switch circuit 130 includes a first output end and a second output end. The first output end of the second switch circuit 130 is used for outputting the power supply voltage of the first power supply A, and the second output end of the second switch circuit 130 is used for outputting the power supply voltage of the second power supply B. The power conversion circuit 150 includes a first sub-power conversion circuit 151 and a second sub-power conversion circuit 152. The input end of the first sub-power conversion circuit 151 is used for electrically connecting to the first power supply A. The output end of the first sub-power conversion circuit 151 is electrically connected to the first input end of the second switch circuit 130. The first output end of the second switch circuit 130 is electrically connected to the second power supply terminal 122 of the switch control circuit. The input end of the second sub-power conversion circuit 152 is used for electrically connecting to the second power supply B. The output end of the second sub-power conversion module is electrically connected to the second input end of the second switch circuit 130. The second output end of the second switch circuit 130 is electrically connected to the second power supply terminal 122 of the switch control circuit.

[0061] In an implementation of this embodiment, the input end of the second switch circuit 130 includes a first input end and a second input end. The first input end of the second switch circuit 130 is used for electrically connecting to the first power supply A, and the second input end of the second switch circuit 130 is used for electrically connecting to the second power supply B. In a possible implementation manner, a switch is provided between the first input end and the first output end of the second switch circuit 130, and this switch is used to realize the electrical connection or electrical insulation between the first input end and the first output end of the second switch circuit 130. A switch is provided between the second input end and the second output end of the second switch circuit 130, and this switch is used to realize the electrical connection or electrical insulation between the second input end and the second output end of the second switch circuit 130. The power supply voltage of the first power supply A is converted into a target voltage by the first sub-power conversion circuit 151, and the target voltage is transmitted to the second power supply end 122 of the switch control circuit through the first input end and the first output end of the second switch circuit 130, so as to provide a working voltage for the switch control circuit 120. The power supply voltage of the second power supply B is converted into a target voltage by the second sub-power conversion circuit 152, and the target voltage is transmitted to the second power supply end 122 of the switch control circuit through the second input end and the second output end of the second switch circuit 130, so as to supply power to the switch control circuit 120.

[0062] In this embodiment, the power supply voltage of the first power supply A is converted into the working voltage of the switch control circuit 120 through the first sub-power conversion circuit 151, and the power supply voltage of the second power supply B is converted into the working voltage of the switch control circuit 120 through the second sub-power conversion circuit 152. That is, the two input power supplies are respectively converted into the working voltage of the switch control circuit 120 through their respective corresponding power conversion circuits 150. This independent design can ensure the independent relationship between the two input power supplies, thus ensuring electrical safety. At the same time, this independent design can also make the two input power supplies exist as auxiliary power supplies for each other, so as to ensure that the switch control circuit 120 can have a power supply to control the first switch circuit 110 to select the first power supply A or the second power supply B.

[0063] Please refer to Figure 3 , in an embodiment of this application, the second switch circuit 130 is further configured to, after the power module 100 is powered on, disconnect the electrical connection between the second power supply end 122 of the switch control circuit and the first power supply A, and disconnect the electrical connection between the second power supply end 122 of the switch control circuit and the second power supply B.

[0064] In this embodiment, after the power module 100 is powered on, the second switch circuit 130 can block the power supply voltage of the first power supply A from being transmitted to the second power supply terminal 122 of the switch control circuit, and can also block the power supply voltage of the second power supply B from being transmitted to the second power supply terminal 122 of the switch control circuit. In a possible implementation manner, after the power module 100 is powered on, the input end and the output end of the second switch circuit 130 are electrically insulated, so as to disconnect the electrical connection between the second power supply terminal 122 of the switch control circuit and the first power supply A, and disconnect the electrical connection between the second power supply terminal 122 of the switch control circuit and the second power supply B, thereby saving power consumption. At the same time, after the power module 100 is powered on, the second power supply terminal 122 of the switch control circuit is in an electrically insulated state from the two output power supplies, that is, the second switch circuit 130 will not interfere with the input signal of the power module 100. Therefore, an EMI filter circuit for the second switch circuit 130 can be omitted, thereby saving the board area of the power module 100.

[0065] In this embodiment, through the second switch circuit 130, it can be realized that after the power module 100 is powered on, the electrical connection between the second power supply terminal 122 of the switch control circuit and the two input power supplies is disconnected, thereby realizing the insulation isolation between the second power supply terminal 122 of the switch control circuit and the front end of the first switch circuit 110, thus avoiding the second switch circuit 130 from generating interference signals to the main circuit, omitting the EMI circuit for the second switch circuit 130, and finally achieving the technical purposes of saving power consumption, reducing the board area of the power module 100, and improving the space utilization rate.

[0066] As Figure 5 shown, in an embodiment of the present application, the switch control circuit 120 is configured to control the second switch circuit 130 to maintain a first state when the power module 100 is not powered on. When the second switch circuit 130 maintains the first state, the second power supply terminal 122 of the switch control circuit receives power supply from at least one of the first power supply A and the second power supply B. And / or, the switch control circuit 120 is configured to control the second switch circuit 130 to maintain a second state when the power module 100 is powered on. When the second switch circuit 130 maintains the second state, the electrical connection between the second power supply terminal 122 of the switch control circuit and the target power supply is disconnected.

[0067] In an implementation manner of this embodiment, the second switch 142 includes: a circuit for electrically connecting the first input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit, and a circuit for electrically connecting the second input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit. The circuit for electrically connecting the first input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit, and the circuit for electrically connecting the second input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit can be respectively turned on or off through a switch (including a mechanical switch or a semiconductor switch). The switch control circuit 120 can control the mechanical switch or the semiconductor switch to make the second switch circuit 130 maintain the first state or the second state. Among them, in an implementation manner, the first state of the second switch 142 includes: the circuit for electrically connecting the first input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit, and the circuit for electrically connecting the second input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit are both in a conducting state. For example, the circuit for electrically connecting the first input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit, or the circuit for electrically connecting the second input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit is in a conducting state. At this time, the switch control circuit 120 can be powered by one of the first power supply A or the second power supply B. For another example, the circuit for electrically connecting the first input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit, and the circuit for electrically connecting the second input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit are both in a conducting state. At this time, the switch control circuit 120 can be powered by at least one of the first power supply A and the second power supply B. When both the first power supply A and the second power supply B are in a powered state, the switch control circuit 120 can be powered by the first power supply A and the second power supply B.

[0068] In an implementation manner of this embodiment, the second state of the second circuit 130 includes: the circuit for electrically connecting the target power supply and the second power supply end 122 of the switch control circuit is in an off state. The target power supply cannot supply power to the second power supply end 122 of the switch control circuit, that is, the target power supply cannot supply power to the switch control circuit 120 through the second power supply end 122 of the switch control circuit.

[0069] In this embodiment, the switch control circuit 120 is further used to control the second switch circuit 130. Therefore, the integration of the control circuit of the first switch circuit 110 and the control circuit of the second switch circuit 130 is realized, and further the board occupation area of the power supply module 100 is saved.

[0070] In an implementation manner of this embodiment, the circuit for electrically connecting the first input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit includes a semiconductor switch, and the control end of the semiconductor switch is electrically connected to the switch control circuit 120. The circuit for electrically connecting the second input end of the second switch circuit 130 and the second power supply end 122 of the switch control circuit includes a semiconductor switch, and the control end of the semiconductor switch is electrically connected to the switch control circuit 120. The semiconductor switch is conducive to the integration of the circuit and saves the board area of the power supply module 100.

[0071] As Figure 7 shown, in an embodiment of the present application, the second switch circuit 130 includes: a normally closed relay switch 140; the first input end of the normally closed relay switch 140 is used for electrically connecting to the first power supply A, the second input end of the normally closed relay switch 140 is used for electrically connecting to the second power supply B, the output end of the normally closed relay switch 140 is electrically connected to the second power supply end 122 of the switch control circuit, and the control end of the normally closed relay switch 140 is electrically connected to the switch control circuit 120.

[0072] When there is no electrical signal passing through the control coil of the normally closed relay, its switch is in the closed state. When there is an electrical signal passing through the control coil of the normally closed relay, its switch is in the off state. Therefore, through the normally closed relay, it can be well realized that: when the power supply module 100 is not powered on, at least one of the first power supply A and the second power supply B supplies power to the second power supply end 122 of the switch control circuit. And after the power supply module 100 is powered on, the electrical connection between the second power supply end 122 of the switch control circuit and the target power supply is disconnected. The target power supply includes the power supply selected by the first switch circuit 110 from the first power supply A and the second power supply B. It can be understood that the target power supply only supplies power to the second power supply end 122 of the switch control circuit through the second switch circuit 130 during the power-on process of the power supply module 100, and stops supplying power after the power supply module 100 is powered on, thereby saving power consumption. At the same time, the EMI circuit configured for the second switch circuit 130 can be omitted.

[0073] In this implementation manner, through the normally closed relay switch 140, it is realized that the target power supply and the second power supply end 122 of the switch control circuit are in an electrically insulated state after the power supply module 100 is powered on. The normally closed relay has a low cost and is conducive to control, and can well achieve the technical purpose.

[0074] As Figure 7As shown, in an embodiment of the present application, the normally closed relay switch 140 includes: a first switch 141, a second switch 142, and a control coil 143. Among them, the input end of the first switch 141 is used to be electrically connected to the first power supply A, and the output end of the first switch 141 is electrically connected to the second power supply end 122 of the switch control circuit. The input end of the second switch 142 is used to be electrically connected to the second power supply B, and the output end of the second switch 142 is electrically connected to the second power supply end 122 of the switch control circuit. The control coil is electrically connected to the output end of the switch control circuit 120, and the control coil is used to control the opening or closing of the first switch 141 and the second switch 142. Among them, the input end of the first switch 141 is the first input end of the second switch circuit 130. The input end of the second switch 142 is the input end of the second switch circuit 130.

[0075] In a possible implementation manner of this embodiment, the output end of the first switch 141 is electrically connected to the second power supply end 122 of the switch control circuit through the first sub-power conversion circuit 151. The output end of the second switch 142 is electrically connected to the second power supply end 122 of the switch control circuit through the second sub-power circuit. The first sub-power conversion module is used to convert the power supply voltage of the first power supply A into a target voltage, and the second sub-power conversion module is used to convert the power supply voltage of the second power supply B into a target voltage. The target voltage is the operating voltage of the switch control circuit 120. When no current flows through the control coil, the first switch 141 and the second switch 142 will close, so that at least one of the first power supply A and the second power supply B supplies power to the second power supply end 122 of the switch control circuit. When current flows through the control coil, the first switch 141 and the second switch 142 will open, so that the target power supply cannot supply power to the second power supply end 122 of the switch control circuit.

[0076] In a possible implementation of this embodiment, the output terminal of the switch control circuit 120 is configured not to output externally when the first power supply terminal 121 of the switch control circuit does not receive power supply and the second power supply terminal 122 of the switch control circuit receives power supply. The output terminal of the switch control circuit 120 is further configured to output current to the control coil when the first power supply terminal 121 of the switch control circuit receives power supply from the target power supply. Thus, when the power supply module 100 is not powered on, the first power supply terminal 121 of the switch control circuit does not receive power supply, while the second power supply terminal 122 of the switch control circuit receives power supply through the second switch 142 control circuit 120. The output terminal of the switch control circuit 120 does not output externally, no current flows through the control coil, the first switch 141 and the second switch 142 are in the closed state, and the second power supply terminal 122 of the switch control circuit receives power supply from at least one of the first power supply A and the second power supply B, so that the switch control circuit 120 can control the first switch circuit 110 to select the first power supply A or the second power supply B. After the switch control circuit 120 controls the first switch circuit 110 to select the target power supply, the target power supply supplies power to the first power supply terminal 121 of the switch control circuit through the first switch circuit 110, the output terminal of the switch control circuit 120 outputs current, the current flows through the control coil, and one of the first switch 141 and the second switch 142 that is electrically connected to the target power supply is disconnected, thereby disconnecting the electrical connection between the target power supply and the second power supply terminal 122 of the switch control circuit.

[0077] In this embodiment, the normally closed relay includes a first switch 141 and a second switch 142. The first switch 141 is configured to supply power from the first power supply A to the second power supply terminal 122 of the switch control circuit, and the second switch 142 is configured to supply power from the second power supply B to the second power supply terminal 122 of the switch control circuit. That is, the normally closed relay including the first switch 141 and the second switch 142 enables the first power supply A and the second power supply B to independently supply power to the second power supply terminal 122 of the switch control circuit respectively, thereby ensuring the independence of the first power supply A and the second power supply B and ultimately ensuring the electrical safety.

[0078] In an embodiment of the present application, the control coil is configured to control the first switch 141 and the second switch 142 to be opened or closed simultaneously.

[0079] In this embodiment, the control coil 143 can synchronously control the first switch 141 and the second switch 142. In a possible implementation, the control coil 143 includes a sub-control coil, and one sub-control coil can control the first switch 141 and the second switch 142 simultaneously. Or in another possible implementation, the control coil 143 includes two sub-control coils. One of the two sub-control coils controls the first switch 141, and the other controls the second switch 142. And the two sub-control coils are both electrically connected to the same output terminal of the switch control circuit 120, so as to ensure synchronization. Or in another possible implementation, the control coil includes a plurality of control coils, and each control coil can control the first switch 141 and the second switch 142. Therefore, as long as one of the plurality of control coils can work normally, it can ensure the normal opening or closing of the first switch 141 and the second switch 142, thereby reducing the probability of failure.

[0080] In this implementation, the control coil 143 controls the synchronization of the first switch 141 and the second switch 142, which can reduce the implementation difficulty and save costs.

[0081] In an embodiment of the present application, the control coil 143 includes a first sub-control coil 143a and a second sub-control coil 143b. The first sub-control coil 143a is used to control the opening or closing of the first switch 141, and the second sub-control coil 143b is used to control the opening or closing of the second switch 142.

[0082] In a possible implementation, both the first sub-control coil 143a and the second sub-control coil 143b are electrically connected to the same output terminal of the switch control circuit 120. At this time, the first sub-control coil 143a and the second sub-control coil 143b can achieve synchronous control of the first switch 141 and the second switch 142.

[0083] In a possible implementation, the output terminal of the switch control circuit 120 includes a first output terminal and a second output terminal. The first sub-control coil is electrically connected to the first output terminal of the switch control circuit 120, and the second sub-control coil is electrically connected to the second output terminal of the switch control circuit 120. The first sub-control coil 143a and the second sub-control coil 143b can achieve the asynchronous operation of the first switch 141 and the second switch 142. For example, a control switch is added before the first output terminal of the switch control circuit 120, and this control switch is controlled by the switch control circuit 120. When the first power supply A supplies power to the second power supply terminal 122 of the switch control circuit through the first switch 141, this control switch closes and remains closed until the control circuit controls the first switch 141 to re-select the target power supply. When the first power supply terminal 121 of the switch control circuit receives power supply, the current flows from the first output terminal into the first sub-control coil 143a through this control switch, and the first switch 141 disconnects. A control switch is added before the second output terminal of the switch control circuit 120, and this control switch is controlled by the switch control circuit 120. When the second power supply B supplies power to the second power supply terminal 122 of the switch control circuit through the second switch 142, this control switch closes and remains closed until the control circuit controls the first switch 141 to re-select the target power supply. When the first power supply terminal 121 of the switch control circuit receives power supply, the current flows from the first output terminal into the second sub-control coil 143b through this control switch, and the second switch 142 disconnects.

[0084] This implementation realizes the independent control of the first switch 141 and the second switch 142. For example, when the first sub-control coil 143a fails, the second switch 142 can still continue to work under the control of the second sub-control coil 143b, so as to ensure that the second power supply terminal 122 of the switch control circuit can receive the power voltage of the second power supply B output by the second switch 142, ensuring the normal operation of the switch control circuit 120.

[0085] In an embodiment of the present application, the output terminal of the second switch circuit 130 includes a first output terminal and a second output terminal. The first output terminal of the second switch circuit 130 is used to output the power voltage of the first power supply A, and the second output terminal of the second switch circuit 130 is used to output the power voltage of the second power supply B. The second power supply terminal 122 of the switch control circuit includes a first sub-power supply terminal 1221 and a second sub-power supply terminal 1222. The first sub-power supply terminal 1221 is electrically connected to the first output terminal of the second switch circuit 130, and the second sub-power supply terminal 1222 is electrically connected to the second output terminal of the second switch circuit 130.

[0086] In this embodiment, each output terminal of the second switch circuit 130 is configured with a corresponding sub-power supply terminal. When the power supply module 100 is not powered on, if one of the sub-power supply terminals fails, the other sub-power supply terminal can still supply power to the switch control circuit 120. Therefore, each output terminal of the second switch circuit 130 being configured with a corresponding sub-power supply terminal can effectively reduce the probability of the switch control circuit 120 losing power due to a failure of the sub-power supply terminal.

[0087] It should be noted that, in this application, the input terminals of the first switch 141 and the second switch 142 in the normally-closed relay switch 140 refer to the input ends of electrical signals (such as current signals or voltage signals), and the output terminals of the first switch 141 and the second switch 142 refer to the output ends of electrical signals (such as current signals or voltage signals). Therefore, the input terminals / output terminals of the first switch 141 and the second switch 142 are only exemplary descriptions, rather than specific limitations.

[0088] In a possible implementation manner, the first switch 141 includes two first sub-switches 1411, and the two first sub-switches 1411 are used to be electrically connected to the two pole lines of the first power supply A in a one-to-one correspondence. The second switch 142 includes two second sub-switches 1421, and the two second sub-switches 1421 are used to be electrically connected to the two pole lines of the second power supply B in a one-to-one correspondence.

[0089] In an embodiment of this application, the power supply module 100 further includes: a main power conversion circuit 160, and the main power conversion circuit is used to provide a working voltage for the main circuit at the back end. The output terminal 113 of the first switch circuit is electrically connected to the input terminal of the main power conversion circuit 160, and the output terminal of the main power conversion circuit 160 is electrically connected to the back-end circuit.

[0090] In an embodiment of this application, the switch control circuit 120 is also electrically connected to the main power conversion circuit 160. The switch control circuit 120 forms a loop by using some components in the main power conversion circuit, and this design can simplify the circuit structure of the switch control circuit.

[0091] An embodiment of this application also provides an integrated circuit, and the integrated circuit includes the power supply module 100 provided in the foregoing embodiment. This integrated circuit can reduce power consumption and can eliminate the EMI filtering circuit of the second switch circuit 130, saving the occupied space of the power supply module 100.

[0092] An embodiment of this application provides a power supply, and the power supply includes the power supply module 100 provided in the foregoing embodiment or the integrated circuit provided in the foregoing embodiment. This power supply can reduce power consumption and can eliminate the EMI filtering circuit of the second switch circuit 130, saving the occupied space of the power supply module 100 and improving the space utilization rate.

[0093] An embodiment of the present application provides a device, which includes the power supply module 100 provided in the foregoing embodiment, or the integrated circuit provided in the foregoing embodiment, or the power supply provided in the foregoing embodiment. This device can reduce power consumption and can eliminate the EMI circuit of the auxiliary power supply, saving the occupied space of the power supply module 100 and improving space utilization.

[0094] The structure, features, and effects of the present invention have been described in detail based on the embodiments shown in the drawings. The above are only the preferred embodiments of the present invention, but the present invention is not limited to the implementation scope shown in the drawings. Any changes made according to the concept of the present invention, or equivalent embodiments modified into equivalent changes, should still be within the protection scope of the present invention as long as they do not exceed the spirit covered by the specification and the drawings.

Claims

1. A power module, characterized in that, Comprising: A first switching circuit, wherein a first input terminal of the first switching circuit is used for externally connecting a first power supply, and a second input terminal of the first switching circuit is used for externally connecting a second power supply; A switching control circuit, wherein an output terminal of the first switching circuit is electrically connected to a first power supply terminal of the switching control circuit, and the switching control circuit is used for controlling the first switching circuit to select the first power supply or the second power supply; A second switching circuit, wherein a first input terminal of the second switching circuit is used for electrically connecting to the first power supply, a second input terminal of the second switching circuit is used for electrically connecting to the second power supply, and an output terminal of the second switching circuit is electrically connected to a second power supply terminal of the switching control circuit; Wherein, the second switching circuit is used for enabling the second power supply terminal of the switching control circuit to receive at least one of the first power supply and the second power supply when the power supply module is not powered on; The second switching circuit is further used for disconnecting the electrical connection between the second power supply terminal of the switching control circuit and the target power supply after the power supply module is powered on; the target power supply includes the power supply selected by the first switching circuit from the first power supply and the second power supply.

2. The power supply module according to claim 1, wherein Further comprising: A power conversion circuit; the output terminal of the second switching circuit and the second power supply terminal of the switching control circuit are electrically connected through the power conversion circuit; An input terminal of the power conversion circuit is electrically connected to the output terminal of the second switching circuit, and an output terminal of the power conversion circuit is electrically connected to the second power supply terminal of the switching control circuit; Wherein, the power conversion circuit is used for converting the received power supply voltage into the working voltage of the switching control circuit.

3. The power supply module according to claim 2, wherein The output terminal of the second switching circuit includes a first output terminal and a second output terminal, the first output terminal of the second switching circuit is used for outputting the power supply voltage of the first power supply, and the second output terminal of the second switching circuit is used for outputting the power supply voltage of the second power supply; The power conversion circuit includes a first sub-power conversion circuit and a second sub-power conversion circuit; an input terminal of the first sub-power conversion circuit is electrically connected to the first output terminal of the second switching circuit, an input terminal of the second sub-power conversion circuit is electrically connected to the second output terminal of the second switching circuit, an output terminal of the first sub-power conversion circuit is electrically connected to the second power supply terminal of the switching control circuit, and an output terminal of the second sub-power conversion circuit is electrically connected to the second power supply terminal of the switching control circuit.

4. The power supply module according to claim 1, characterized in that, The second switching circuit is further used for, after the power supply module is powered on, disconnecting the electrical connection between the second power supply terminal of the switching control circuit and the first power supply, and disconnecting the electrical connection between the second power supply terminal of the switching control circuit and the second power supply.

5. The power supply module according to claim 1, wherein, The switching control circuit is used for controlling the second switching circuit to maintain a first state when the power supply module is not powered on; when the second switching circuit maintains the first state, the second power supply terminal of the switching control circuit receives at least one of the first power supply and the second power supply; And / or The switch control circuit is used to control the second switch circuit to maintain a second state when the power supply module is powered on; when the second switch circuit maintains the second state, the electrical connection between the second power supply terminal of the switch control circuit and the target power supply is disconnected.

6. The power supply module according to claim 1, characterized in that The second switch circuit includes: a normally closed relay switch; The first input terminal of the normally closed relay switch is used for electrically connecting to the first power supply, the second input terminal of the normally closed relay switch is used for electrically connecting to the second power supply, the output terminal of the normally closed relay switch is electrically connected to the second power supply terminal of the switch control circuit, and the control terminal of the normally closed relay switch is electrically connected to the switch control circuit.

7. The power supply module according to claim 6, characterized in that, The normally closed relay switch includes: A first switch, the input terminal of the first switch is used for electrically connecting to the first power supply, and the output terminal of the first switch is electrically connected to the second power supply terminal of the switch control circuit; A second switch, the input terminal of the second switch is used for electrically connecting to the second power supply, and the output terminal of the second switch is electrically connected to the second power supply terminal of the switch control circuit; A control coil, the control coil is electrically connected to the output terminal of the switch control circuit, and the control coil is used to control the opening or closing of the first switch and the second switch.

8. The power supply module according to claim 7, wherein The control coil is used to control the first switch and the second switch to open or close simultaneously.

9. The power supply module according to claim 7, characterized in that The control coil includes a first sub-control coil and a second sub-control coil. The first sub-control coil is used to control the opening or closing of the first switch, and the second sub-control coil is used to control the opening or closing of the second switch.

10. The power supply module according to claim 1, characterized in that The output terminal of the second switch circuit includes a first output terminal and a second output terminal. The second power supply terminal of the switch control circuit includes a first sub-power supply terminal and a second sub-power supply terminal. The first sub-power supply terminal is electrically connected to the first output terminal of the second switch circuit, and the second sub-power supply terminal is electrically connected to the second output terminal of the second switch circuit.

11. An integrated circuit, characterized in that, The integrated circuit includes the power supply module according to any one of claims 1 to 10.

12. A power supply, characterized in that, The power supply includes the power supply module according to any one of claims 1 to 10 or the integrated circuit according to claim 11.

13. A device, characterized in that, The device includes the power supply module according to any one of claims 1 to 10, or the integrated circuit according to claim 11, or the power supply according to claim 12.

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