Power supply module, integrated circuit, power supply and device

Abstract

Disclosed in the present invention are a power supply module, an integrated circuit, a power supply and a device. The power supply module comprises: a first switch circuit, a first input end of the first switch circuit being used for being connected to an external first power supply, a second input end of the first switch circuit being used for being connected to an external second power supply, and an output end of the first switch circuit being electrically connected to a first power supply end of a switch control circuit; the switch control circuit, used for controlling the first switch circuit to select the first power supply or the second power supply; and a second switch circuit, a first input end of the second switch circuit being used for being electrically connected to the first power supply, a second input end of the second switch circuit being used for being electrically connected to the second power supply, and an output end of the second switch circuit being electrically connected to a second power supply end of the switch control circuit. The second switch circuit is used for enabling, when the power supply module is not powered on, the 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, and is also used for disabling electrical connection between the second power supply end of the switch control circuit and a target power supply after the power supply module is powered on. The target power supply is a power supply selected by the first switch circuit from the first power supply and the second power supply.

Description

A power module, integrated circuit, power supply and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on December 21, 2023, with application number 202311767744.1 and application name “A power module, integrated circuit, power supply and device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of power supply, and in particular to a power supply module, an integrated circuit, a power supply and a device. Background Art

[0003] Dual power supply means that the same device has two input power sources. When one of the power sources is disconnected, the device's combining switch will automatically jump to the other power source to continue supplying power, thus preventing the device from losing power. In order to achieve the goal that the combining switch can automatically switch to the other input power source when one power source is disconnected. Among the two input power sources, each input power source not only supplies power to the main circuit through the combining switch, but also supplies power to the combining switch controller through a branch circuit connected to the front end of the combining switch, thereby preventing the combining switch from being unable to jump due to power failure. In order to ensure that the combining switch controller can always obtain power supply, the branch circuit needs to be connected to the front end of the combining switch, which results in: the EMI (Electromagnetic Interference) filter circuit inside the power module has no filtering effect on the branch circuit. Therefore, it is also necessary to configure an EMI rate circuit separately for this branch circuit.

[0004] This results in the problem that the branch circuit occupies a large board area, has low space utilization and high power consumption. Summary of the Invention

[0005] The purpose of the present invention is to provide a power supply circuit, circuit and device to solve the problems in the prior art that the auxiliary power supply part occupies a large board area, has low space utilization and high power consumption.

[0006] In a first aspect, an embodiment of the present application provides a power supply module, comprising: a first switching circuit, a switch control circuit, and a second switching circuit. The first input end of the first switching circuit is used to connect to an external first power supply, and the second input end of the first switching circuit is used to connect to an external second power supply. The output end of the first switching 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 switching circuit to select the first power supply or the second power supply. The first input end of the second switching circuit is used to electrically connect to the first power supply, the second input end of the second switching circuit is used to electrically connect to the second power supply, and the output end of the second switching circuit is electrically connected to the second power supply end of the switch control circuit. The second switching circuit is used to enable the second power supply end of the switch control circuit to receive power from 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 also used to disconnect the second power supply end of the switch control circuit from 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, whichever is the first or second power supply.

[0007] In this embodiment, the first switching circuit is used to select a power supply, the second switching circuit is used to enable the first power supply or the second power supply to serve as an auxiliary power supply for the switch control circuit, and the switch control circuit is used to control the first switching circuit to select the first power supply or the second power supply. Furthermore, after the power module is powered on, the second switching circuit can be used to electrically disconnect the switch control circuit from the power supply selected by the switch control 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 for the power module, the power-on power supply and the switch control circuit are electrically isolated. Therefore, the second switching circuit does not cause electromagnetic interference to the input signal of the main circuit, thereby eliminating the need for an EMI filter circuit for the second switching circuit, thereby saving power consumption, board area, and improving space utilization.

[0008] In one implementation 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 switch control circuit via 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 switch control circuit. The power conversion circuit is configured to convert a received power supply voltage into an operating voltage for the switch control circuit.

[0009] In this implementation, the second switch circuit and the switch control circuit are electrically connected via a power conversion circuit, which enables the switch control circuit to control the first switch to complete power selection under the operating voltage, thereby ensuring the power safety of the switch control circuit.

[0010] In one implementation 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 switch control circuit, and the output end of the second sub-power conversion circuit is electrically connected to the second power supply end of the switch control circuit.

[0011] 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 sources are converted into the operating voltage of the switch control circuit by their respective corresponding power supply conversion circuits. This independent design ensures the mutual independence of the two input power sources, thereby ensuring power safety. At the same time, this independent design also allows the two input power sources to simultaneously serve as auxiliary power sources for each other, ensuring that the switch control circuit can control the first switch circuit to select the first power supply or the second power supply.

[0012] In an implementation of the first aspect, the second switching circuit is further used to, after the power module is powered on, disconnect the electrical connection between the second power supply end of the switch control circuit and the first power supply, and disconnect the electrical connection between the second power supply end of the switch control circuit and the second power supply.

[0013] In this implementation, the second switching circuit can achieve the following: after the power module is powered on, the electrical connection between the second power supply end of the switch control circuit and the two input power supplies is disconnected, thereby achieving insulation isolation between the second power supply end of the switch control circuit and the front end of the first switching circuit, thereby avoiding the second switching circuit from generating interference signals to the main circuit, eliminating the need to configure an EMI circuit for the second switching circuit, and ultimately achieving the technical purpose of saving power consumption, reducing the board area occupied by the power module, and improving space utilization.

[0014] In one implementation of the first aspect, the switch control circuit is configured to control the second switch circuit to maintain a first state when the power 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 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 a second state when the power module is powered on. When the second switch circuit maintains the second state, the second power supply terminal of the switch control circuit is electrically disconnected from the target power supply.

[0015] In this implementation, the switch control circuit is also used to control the second switch circuit. Therefore, the control circuit of the first switch circuit and the control circuit of the second switch circuit are integrated, further saving the board area of ​​the power module.

[0016] In one implementation of the first aspect, the second switching circuit includes: a normally closed relay switch; a first input end of the normally closed relay switch is used to electrically connect to a first power supply, a second input end of the normally closed relay switch is used to electrically connect to a second power supply, an output end of the normally closed relay switch is electrically connected to a second power supply end of the switch control circuit, and a control end of the normally closed relay switch is electrically connected to the switch control circuit.

[0017] In this implementation, a normally closed relay is used to electrically isolate the target power source from the second power supply terminal of the switch control circuit after the power module is powered on. Normally closed relays are inexpensive and easy to control, and they effectively achieve the technical objectives.

[0018] In one implementation of the first aspect, a normally closed relay switch includes: a first switch, a second switch, and a control coil. The first switch has an input terminal electrically connected to a first power supply, and an output terminal electrically connected to a second power supply terminal of a switch control circuit. The second switch has an input terminal electrically connected to a second power supply, and an output terminal electrically connected to the second power supply terminal of the switch control circuit. The control coil is electrically connected to the output terminal of the switch control circuit and is configured to control the opening and closing of the first and second switches.

[0019] In this implementation, the normally closed relay includes a first switch and a second switch. The first switch is used to enable the first power source to supply power to the second power source terminal of the switch control circuit, and the second switch is used to enable the second power source to supply power to the second power source terminal of the switch control circuit. In other words, the normally closed relay includes the first and second switches, enabling the first and second power sources to independently supply power to the second power source terminal of the switch control circuit, thereby ensuring the independence of the first and second power sources and ultimately ensuring electrical safety.

[0020] In an implementation of the first aspect, the control coil is used to control the simultaneous opening or closing of the first switch and the second switch.

[0021] In this implementation, the control coil controls the synchronization of the first switch and the second switch, which can reduce implementation difficulty and save costs.

[0022] In an implementation 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.

[0023] This implementation allows for independent control of the first and second switches. For example, if the first sub-control coil fails, the second switch can continue to operate under the control of the second sub-control coil, thereby ensuring that the second power supply terminal of the switch control circuit can receive the power supply voltage of the second power supply output by the second switch, ensuring the normal operation of the switch control circuit.

[0024] In an implementation of the first aspect, the second switching circuit includes a first output terminal and a second output terminal, the second power supply terminal of the switching 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 switching circuit, and the second sub-power supply terminal is electrically connected to the second output terminal of the second switching circuit.

[0025] In this implementation, each output terminal of the second switching circuit is configured with a corresponding sub-power terminal. If one of the sub-power terminals fails when the power module is not powered on, the other sub-power terminal can still supply power to the switch control circuit. Therefore, configuring each output terminal of the second switching circuit with a corresponding sub-power terminal effectively reduces the probability of powering off the switch control circuit due to a sub-power terminal failure.

[0026] In a second aspect, an embodiment of the present application further provides an integrated circuit, comprising the power module of the first aspect. The integrated circuit can reduce power consumption and eliminate the EMI filter circuit of the second switching circuit, thereby saving space occupied by the power module.

[0027] In a third aspect, embodiments of the present application provide a power supply comprising the power module of the first aspect or the integrated circuit of the second aspect. The power supply can reduce power consumption and eliminate the EMI filter circuit of the second switching circuit, thereby saving space occupied by the power module.

[0028] In a fourth aspect, embodiments of the present application provide a device comprising the power module of the first aspect, the integrated circuit of the second aspect, or the power supply of the third aspect. This device can reduce power consumption and eliminate circuits that reduce EMI in the auxiliary power supply, thereby saving space occupied by the power module and improving space utilization.

[0029] Compared to the prior art, the present invention addresses the problem of branch circuits generating interference signals to back-end circuits during power supply circuit operation. By utilizing a second switching circuit, the present invention enables the second power supply terminal of the switch control circuit to be isolated from the target power supply after the power module is powered on. Specifically, when the switch control circuit controls the first switching circuit to select the first power supply, the second switching circuit electrically isolates the second power supply terminal of the switch control circuit from the first power supply after the power module is powered on. When the switch control circuit controls the first switching circuit to select the second power supply, the second switching circuit electrically isolates the second power supply terminal of the switch control circuit from the second power supply after the power module is powered on, thereby reducing the power consumption of the power module. The present invention achieves isolation between the second power supply terminal of the switch control circuit and the target power supply after the power module is powered on, thereby fundamentally preventing interference signals generated by the second switching circuit from interfering with the input signal of the power module. Therefore, the power module provided by the present invention can eliminate the need for an EMI filter circuit in the second switching circuit, thereby saving the board area occupied by the power module and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic diagram of a power module provided by an embodiment of the present application when it is not powered on; a schematic diagram of the structure of a power circuit when there is power input to a power receiving unit;

[0031] FIG2 is a schematic diagram of a power module provided in an embodiment of the present application when powered on;

[0032] FIG3 is a schematic diagram of a power module provided in an embodiment of the present application when powered on;

[0033] FIG4 is a schematic diagram of a power module provided in an embodiment of the present application;

[0034] FIG5 is a schematic diagram of a power module provided in an embodiment of the present application;

[0035] FIG6 is a schematic diagram of a power supply module provided in an embodiment of the present application;

[0036] FIG7 is a schematic diagram of a power module provided in an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 100. Power supply module; 110. First switching circuit; 111. First input terminal; 112. Second input terminal; 113. Output terminal; 120. Switch control circuit; 121. First power terminal of the switch control circuit; 122. Second power terminal of the switch control circuit; 130. Second switching 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 DESCRIPTION

[0039] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0040] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0042] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0043] Before describing the embodiments of the present application in detail, the technical problems existing in the prior art will be further explained.

[0044] In existing power modules, the two input power sources are undifferentiated, meaning there are no priority restrictions between the two. When both power sources are available, either one can be used to power the main circuit. This results in either input power source always needing to serve as an auxiliary power source for the other input power source, powering the combiner controller. For example, if one of the two input power sources supplies power to the main circuit, it also serves as an auxiliary power source for the other input power source, powering the combiner controller. This means that while the other input power source supplies power to the main circuit through the combiner, it also needs to power the combiner controller through a branch circuit connected before the combiner. For example, when A supplies power to the main circuit, it also serves as an auxiliary power source for B, powering the combiner controller. When A serves as the auxiliary power source for B, the EMI filter circuit of the main circuit cannot filter the portion of A serving as the auxiliary power source for B (i.e., the branch circuit). Therefore, a separate EMI filter circuit is required for the portion of A serving as the auxiliary power source for B to prevent interference signals from being generated on the input power source. Similarly, when B powers the main circuit, it also serves as an auxiliary power source for A, powering the combiner controller. This branch circuit, where B serves as an auxiliary power source for A, requires a separate EMI filter circuit to prevent interference with the input power. This results in a large board area occupied by the branch circuit, resulting in low space utilization.

[0045] In addition, when both input power sources are powered, either one of the two input power sources simultaneously serves as an auxiliary power source for the other to power the combining switch controller, thereby generating a large amount of power consumption, and the separately configured EMI circuit also generates power consumption. Therefore, the existing power supply module causes the problem of high power consumption in the branch circuit.

[0046] As shown in Figures 1 to 3, an embodiment of the present application provides a power supply module 100, which includes a first switching circuit 110, a switch control circuit 120, and a second switching circuit 130. The first input terminal 111 of the first switching circuit is used to connect to an external first power source A, and the second input terminal 112 of the first switching circuit is used to connect to an external second power source B. The output terminal 113 of the first switching circuit is electrically connected to the first power source terminal 121 of the switch control circuit. The switch control circuit 120 is used to control the first switching circuit 110 to select the first power source A or the second power source B. The first input terminal of the second switching circuit 130 is electrically connected to the first power source A, the second input terminal of the second switching circuit 130 is electrically connected to the second power source B, and the output terminal of the second switching circuit 130 is electrically connected to the second power source terminal 122 of the switch control circuit. The second switching circuit 130 is used to enable the second power source terminal 122 of the switch control circuit to receive power from at least one of the first power source A and the second power source B when the power supply module 100 is not powered on. The second switch circuit 130 is further configured to disconnect the second power terminal 122 of the switch control circuit from the target power source after the power module 100 is powered on. The target power source includes the power source selected by the first switch circuit 110 from the first power source A and the second power source B.

[0047] In this embodiment, the power module 100 is not powered on when the output terminal 113 of the first switching circuit does not output a voltage. When the first input terminal 111 and / or the second input terminal 112 of the first switching circuit are connected to a power source, but the output terminal 113 of the first switching circuit is electrically isolated from the first input terminal 111 and the second input terminal 112 of the first switching circuit, respectively, the power module 100 is considered to be not powered on. The power module 100 is powered on when the output terminal 113 of the first switching circuit is able to output the power voltage of the first power source A or the power voltage of the second power source B. That is, when at least one of the first power source A or the second power source B is powered, the output terminal 113 of the first switching circuit remains electrically connected to the first input terminal 111 or the second input terminal of the first switching circuit. The first switch circuit 110 selects the first power supply A or the second power supply B by: 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. Specifically, when the output terminal 113 of the first switch circuit is electrically connected to the first input terminal 111 of the first switch circuit, the first power supply A is selected for the first switch circuit 110; when the output terminal 113 of the first switch circuit is electrically connected to the second input terminal 112 of the first switch circuit, the second power supply B is selected for the first switch circuit 110. The power supply selected by the first switch circuit 110 between the first power supply A and the second power supply B is 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 between the first power supply A and the second power supply B is the power supply. In one possible implementation, the target power supply powers up the power module.

[0048] It should be noted that in the embodiment of the present application, at the same time, the switch control circuit 120 controls the output terminal 113 of the first switch circuit to be electrically connected to only one of the first input terminal 111 of the first switch circuit and the second input terminal 112 of the first switch circuit. 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, the output terminal 113 of the first switch circuit is electrically isolated from the second input terminal 112 of the first switch circuit. When the output terminal 113 of the first switch circuit is electrically connected to the second input terminal 112 of the first switch circuit, the output terminal 113 of the first switch circuit is electrically isolated from the first input terminal 111 of the first switch circuit.

[0049] In this embodiment, the first switching circuit 110 is used to select a power source, and the second switching circuit 130 is used to enable the first power source A or the second power source B to serve as an auxiliary power source for powering the switch control circuit 120. The switch control circuit 120 is used to control the first switching circuit 110 to select the first power source A or the second power source B. Furthermore, after the power module 100 is powered on, the second switching circuit 130 can electrically disconnect the switch control circuit 120 from the power source selected by the switch control circuit 120. It can be understood that after the first switching circuit 110 selects the first power source A or the second power source B as the power source for the power module 100, the power source and the switch control circuit 120 are electrically isolated. Therefore, the second switching circuit 130 does not cause electromagnetic interference to the input signal of the main circuit, thereby eliminating the need for an EMI filter circuit for the second switching circuit 130, thereby saving power consumption, board area, and improving space utilization.

[0050] In one implementation of this embodiment, the second switch circuit 130 is used to electrically connect the second power supply terminal 122 of the switch control circuit to the first input terminal of the second switch circuit 130 and the second input terminal of the second switch circuit 130 respectively when the power module 100 is not powered on.

[0051] As shown in FIG4 , in one embodiment of the present application, the power module 100 further includes a power conversion circuit 150. The output terminal of the second switching circuit 130 is electrically connected to the second power terminal 122 of the switch control circuit via the power conversion circuit 150. The input terminal of the power conversion circuit 150 is electrically connected to the output terminal of the second switching circuit 130, and the output terminal of the power conversion circuit 150 is electrically connected to the second power terminal 122 of the switch control circuit. The power conversion circuit 150 is configured to convert a received power supply voltage into an operating voltage for the switch control circuit 120.

[0052] In this embodiment, when the second switching circuit 130 outputs the power voltage of the first power source A and / or the power voltage of the second power source B, the power conversion circuit 150, upon receiving the power voltage of the first power source A and / or the power voltage of the second power source B, can convert the received power voltage to a target voltage and transmit the target voltage to the second power source terminal 122 of the switch control circuit, thereby providing the target voltage to the second power source 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 safety of the switch control circuit 120. In one implementation, the power conversion circuit includes at least one of an AC-DC circuit and a DC-DC circuit. The specific type of AC-DC circuit and DC-DC circuit included in the power conversion circuit can be determined based on actual needs. For example, when the first power source and the second power source are both alternating current, the power conversion circuit 150 includes at least an AC-DC circuit. If the first power source and the second power source are both direct current, the power conversion circuit 150 includes at least a DC-DC circuit.

[0053] In this embodiment, the second switch circuit 130 and the switch control circuit 120 are electrically connected via the power conversion circuit 150, so that the switch control circuit 120 can control the first switch 141 to complete the power selection under the working voltage, thereby ensuring the power safety of the switch control circuit 120.

[0054] As shown in FIG5 , in one 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 power conversion circuit 150 includes a first sub-power conversion circuit 151 and a second sub-power conversion circuit 152. The input terminal of the first sub-power conversion circuit 151 is electrically connected to the first output terminal of the second switch circuit 130, and the input terminal of the second sub-power conversion circuit 152 is electrically connected to the second output terminal of the second switch circuit 130. The output terminal of the first sub-power conversion circuit 151 is electrically connected to the second power terminal 122 of the switch control circuit, and the output terminal of the second sub-power conversion circuit 152 is electrically connected to the second power terminal 122 of the switch control circuit.

[0055] 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 to electrically connect to the first power source A, and the second input end of the second switch circuit 130 is used to electrically connect to the second power source B. In one possible implementation, a switch is provided between the first input end of the second switch circuit 130 and the first output end of the second switch circuit 130. The switch is used to electrically connect or isolate the first input end of the second switch circuit 130 from the first output end of the second switch circuit 130. A switch is provided between the second input end of the second switch circuit 130 and the second output end of the second switch circuit 130. The switch is used to electrically connect or isolate the second input end of the second switch circuit 130 from the second output end of the second switch circuit 130. The power supply voltage of the first power source A is transmitted to the second power supply terminal 122 of the switch control circuit via the first input end and the first output end of the second switch circuit 130, thereby powering the switch control circuit 120. The power supply voltage of the second power supply B is transmitted to the second power supply terminal 122 of the switch control circuit via the second input terminal and the second output terminal of the second switch circuit 130 , thereby supplying power to the switch control circuit 120 .

[0056] In this embodiment, the second switching circuit 130 receives the power supply voltage of the first power supply A and outputs it from the first output terminal of the second switching 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 via the first sub-power conversion circuit 151 and output to the second power supply terminal 122 of the switching control circuit, thereby supplying power to the second power supply terminal 122 of the switching control circuit.

[0057] 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 via the first sub-power supply 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 via the second sub-power supply conversion circuit 152. That is, the two input power sources are converted into the operating voltage of the switch control circuit 120 by their respective corresponding power supply conversion circuits 150. This independent design ensures the mutual independence of the two input power sources, thereby ensuring power safety. At the same time, this independent design also allows the two input power sources to simultaneously serve as auxiliary power sources for each other, thereby ensuring 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.

[0058] As shown in FIG6 , in one 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. The first input end of the power conversion circuit 150 is used to electrically connect to the first power source A, and the second input end of the power conversion circuit 150 is used to electrically connect to the second power source 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 to convert the received power supply voltage into the operating voltage of the switch control circuit 120 .

[0059] In this embodiment, the first input terminal of the second switch circuit 130 is used to electrically connect to the first power supply A through the first input terminal of the power conversion circuit 150, and the second input terminal of the second switch circuit 130 is used to electrically connect to the second power supply B through the second input terminal of the power conversion circuit 150.

[0060] In this embodiment, when the second switch circuit 130 outputs the power voltage of the first power source A and / or the power voltage of the second power source B, the power conversion circuit 150, when receiving the power voltage of the first power source A and / or the power voltage of the second power source B, can convert the received power voltage into a target voltage and transmit the target voltage to the second power supply terminal 122 of the switch control circuit, thereby 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 safety of the switch control circuit 120.

[0061] In one embodiment of the present application, the output 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 power conversion circuit 150 includes a first sub-power conversion circuit 151 and a second sub-power conversion circuit 152. The input terminal of the first sub-power conversion circuit 151 is used to electrically connect to the first power supply A, the output terminal of the first sub-power conversion circuit 151 is electrically connected to the first input terminal of the second switch circuit 130, the first output terminal of the second switch circuit 130 is electrically connected to the second power supply terminal 122 of the switch control circuit, and the input terminal of the second sub-power conversion circuit 152 is used to electrically connect to the second power supply B. The output terminal of the second sub-power conversion module is electrically connected to the second input terminal of the second switch circuit 130, and the second output terminal of the second switch circuit 130 is electrically connected to the second power supply terminal 122 of the switch control circuit.

[0062] In one implementation of this embodiment, the input terminals of the second switch circuit 130 include a first input terminal and a second input terminal. The first input terminal of the second switch circuit 130 is used to electrically connect to the first power source A, and the second input terminal of the second switch circuit 130 is used to electrically connect to the second power source B. In one possible implementation, a switch is provided between the first input terminal of the second switch circuit 130 and the first output terminal of the second switch circuit 130. This switch is used to electrically connect or isolate the first input terminal of the second switch circuit 130 from the first output terminal of the second switch circuit 130. A switch is provided between the second input terminal of the second switch circuit 130 and the second output terminal of the second switch circuit 130. This switch is used to electrically connect or isolate the second input terminal of the second switch circuit 130 from the second output terminal of the second switch circuit 130. The power supply voltage of the first power source A is converted to a target voltage by the first sub-power conversion circuit 151. The target voltage is transmitted to the second power supply terminal 122 of the switch control circuit via the first input terminal and the first output terminal of the second switch circuit 130, thereby providing an operating 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 supply conversion circuit 152, and the target voltage is transmitted to the second power supply terminal 122 of the switch control circuit via the second input terminal and the second output terminal of the second switch circuit 130, thereby powering the switch control circuit 120.

[0063] 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 via the first sub-power supply 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 via the second sub-power supply conversion circuit 152. That is, the two input power sources are converted into the operating voltage of the switch control circuit 120 by their respective corresponding power supply conversion circuits 150. This independent design ensures the mutual independence of the two input power sources, thereby ensuring power safety. At the same time, this independent design also allows the two input power sources to simultaneously serve as auxiliary power sources for each other, thereby ensuring 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.

[0064] Please refer to Figure 3. In one embodiment of the present application, the second switch circuit 130 is also used 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 after the power module 100 is powered on.

[0065] In this embodiment, after the power module 100 is powered on, the second switch circuit 130 can block the power voltage of the first power source A from being transmitted to the second power source terminal 122 of the switch control circuit, and can also block the power voltage of the second power source B from being transmitted to the second power source terminal 122 of the switch control circuit. In one possible implementation, after the power module 100 is powered on, the input and output terminals of the second switch circuit 130 are electrically isolated, thereby disconnecting the second power source terminal 122 of the switch control circuit from the first power source A and from the second power source B, thereby saving power consumption. Furthermore, since the second power source terminal 122 of the switch control circuit is electrically isolated from the two output power sources after the power module 100 is powered on, the second switch circuit 130 will not interfere with the input signal of the power module 100. Therefore, it is unnecessary to configure an EMI filter circuit for the second switch circuit 130, thereby saving the board area of ​​the power module 100.

[0066] In this embodiment, the second switch circuit 130 can achieve the following: 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 achieving insulation isolation between the second power supply terminal 122 of the switch control circuit and the front end of the first switch circuit 110, thereby preventing the second switch circuit 130 from generating interference signals to the main circuit, eliminating the need to configure an EMI circuit for the second switch circuit 130, and ultimately achieving the technical goals of saving power consumption, reducing the board area occupied by the power module 100, and improving space utilization.

[0067] As shown in FIG5 , in one 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 from at least one of the first power source A and the second power source B. Furthermore, 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 second power supply terminal 122 of the switch control circuit is electrically disconnected from the target power source.

[0068] In one implementation of this embodiment, the second switch 142 includes: a circuit for electrically connecting the first input terminal of the second switch circuit 130 to the second power supply terminal 122 of the switch control circuit, and a circuit for electrically connecting the second input terminal of the second switch circuit 130 to the second power supply terminal 122 of the switch control circuit. The circuit for electrically connecting the first input terminal of the second switch circuit 130 to the second power supply terminal 122 of the switch control circuit and the circuit for electrically connecting the second input terminal of the second switch circuit 130 to the second power supply terminal 122 of the switch control circuit can each be turned on or off by 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 maintain the second switch circuit 130 in the first state or the second state. In one implementation, the first state of the second switch 142 includes: the circuit for electrically connecting the first input terminal of the second switch circuit 130 to the second power supply terminal 122 of the switch control circuit and the circuit for electrically connecting the second input terminal of the second switch circuit 130 to the second power supply terminal 122 of the switch control circuit are both in the on state. For example, if the circuit electrically connecting the first input terminal of the second switch circuit 130 and the second power supply terminal 122 of the switch control circuit or the circuit electrically connecting the second input terminal of the second switch circuit 130 and the second power supply terminal 122 of the switch control circuit is in a conductive state, the switch control circuit 120 can be powered by one of the first power supply A and the second power supply B. For another example, if the circuit electrically connecting the first input terminal of the second switch circuit 130 and the second power supply terminal 122 of the switch control circuit and the circuit electrically connecting the second input terminal of the second switch circuit 130 and the second power supply terminal 122 of the switch control circuit are both in a conductive state, the switch control circuit 120 can be powered by at least one of the first power supply A and the second power supply B. If both the first power supply A and the second power supply B are in a conductive state, the switch control circuit 120 can be powered by both the first power supply A and the second power supply B.

[0069] In one implementation of this embodiment, the second state of the second circuit 130 includes: the circuit electrically connecting the target power source and the second power supply terminal 122 of the switch control circuit is in an off state. The target power source is unable to supply power to the second power supply terminal 122 of the switch control circuit, that is, the target power source is unable to supply power to the switch control circuit 120 via the second power supply terminal 122 of the switch control circuit.

[0070] In this embodiment, the switch control circuit 120 is also used to control the second switch circuit 130. Therefore, the control circuit of the first switch circuit 110 and the control circuit of the second switch circuit 130 are integrated, further saving the board area of ​​the power module 100.

[0071] In one implementation of this embodiment, the circuit for electrically connecting the first input terminal of the second switch circuit 130 and the second power supply terminal 122 of the switch control circuit includes a semiconductor switch, the control terminal of which is electrically connected to the switch control circuit 120. The circuit for electrically connecting the second input terminal of the second switch circuit 130 and the second power supply terminal 122 of the switch control circuit includes a semiconductor switch, the control terminal of which is electrically connected to the switch control circuit 120. The semiconductor switch facilitates circuit integration and reduces the board area occupied by the power module 100.

[0072] As shown in Figure 7, in one embodiment of the present application, the second switching circuit 130 includes: a normally closed relay switch 140; the first input end of the normally closed relay switch 140 is used to electrically connect to the first power supply A, the second input end of the normally closed relay switch 140 is used to electrically connect 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.

[0073] When no electrical signal passes through the control coil of the normally closed relay, its switch is in the closed state. When an electrical signal passes through the control coil of the normally closed relay, its switch is in the closed state. Therefore, the normally closed relay effectively enables the following: when the power module 100 is not powered on, the second power supply terminal 122 of the switch control circuit receives power from at least one of the first power supply A and the second power supply B. 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 target power supply is disconnected. The target power supply includes the first power supply A or the second power supply B selected by the first switch circuit 110. It can be understood that the target power supply only supplies power to the second power supply terminal 122 of the switch control circuit through the second switch circuit 130 while the power module 100 is powered on, and stops supplying power after the power module 100 is powered on, thereby saving power. This also eliminates the need for an EMI circuit for the second switch circuit 130.

[0074] In this implementation, the target power source and the second power supply terminal 122 of the switch control circuit are electrically isolated from each other after the power module 100 is powered on by a normally closed relay switch 140. Normally closed relays are low-cost and easy to control, and can effectively achieve the technical purpose.

[0075] As shown in FIG7 , in one embodiment of the present application, a normally closed relay switch 140 includes a first switch 141, a second switch 142, and a control coil 143. The input end of the first switch 141 is electrically connected to the first power source A, and the output end of the first switch 141 is electrically connected to the second power source terminal 122 of the switch control circuit. The input end of the second switch 142 is electrically connected to the second power source B, and the output end of the second switch 142 is electrically connected to the second power source terminal 122 of the switch control circuit. The control coil is electrically connected to the output end of the switch control circuit 120 and is used to control the opening and closing of the first switch 141 and the second switch 142. The input end of the first switch 141 serves as the first input end of the second switch circuit 130. The input end of the second switch 142 serves as the input end of the second switch circuit 130.

[0076] In one possible implementation of this embodiment, the output end of the first switch 141 is electrically connected to the second power supply terminal 122 of the switch control circuit via a first sub-power conversion circuit 151. The output end of the second switch 142 is electrically connected to the second power supply terminal 122 of the switch control circuit via a second sub-power circuit. The first sub-power conversion module is configured to convert the power supply voltage of the first power supply A to a target voltage, and the second sub-power conversion module is configured to convert the power supply voltage of the second power supply B to 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 are closed, allowing at least one of the first power supply A and the second power supply B to supply power to the second power supply terminal 122 of the switch control circuit. When current flows through the control coil, the first switch 141 and the second switch 142 are opened, preventing the target power supply from supplying power to the second power supply terminal 122 of the switch control circuit.

[0077] In one possible implementation of this embodiment, the output of the switch control circuit 120 is configured to not output current when the first power supply terminal 121 of the switch control circuit is not receiving power and the second power supply terminal 122 of the switch control circuit is receiving power. The output of the switch control circuit 120 is also configured to output current to the control coil when the first power supply terminal 121 of the switch control circuit is receiving power from the target power source. Consequently, when the power module 100 is not powered on, the first power supply terminal 121 of the switch control circuit is not receiving power, while the second power supply terminal 122 of the switch control circuit receives power from the control circuit 120 via the second switch 142. The output of the switch control circuit 120 does not output current, no current flows through the control coil, the first switch 141 and the second switch 142 are closed, and the second power supply terminal 122 of the switch control circuit receives power from at least one of the first power source A and the second power source B, thereby enabling the switch control circuit 120 to control the first switch circuit 110 to select either the first power source A or the second power source 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, and the current flows through the control coil, disconnecting one of the first switch 141 and the second switch 142 that is electrically connected to the target power supply, thereby disconnecting the electrical connection between the target power supply and the second power supply terminal 122 of the switch control circuit.

[0078] In this embodiment, the normally closed relay includes a first switch 141 and a second switch 142. The first switch 141 is used to enable the first power source A to supply power to the second power source terminal 122 of the switch control circuit, and the second switch 142 is used to enable the second power source B to supply power to the second power source terminal 122 of the switch control circuit. In other words, the normally closed relay, including the first switch 141 and the second switch 142, enables the first power source A and the second power source B to independently supply power to the second power source terminal 122 of the switch control circuit, thereby ensuring the independence of the first power source A and the second power source B, and ultimately ensuring electrical safety.

[0079] In one embodiment of the present application, the control coil is used to control the first switch 141 and the second switch 142 to be opened or closed simultaneously.

[0080] In this embodiment, the control coil 143 can synchronously control the first switch 141 and the second switch 142. In one possible implementation, the control coil 143 includes a sub-control coil, and the sub-control coil can simultaneously control the first switch 141 and the second switch 142. Or in another possible implementation, the control coil 143 includes two sub-control coils, one of which controls the first switch 141 and the other controls the second switch 142, and the two sub-control coils are electrically connected to the same output terminal of the switch control circuit 120, thereby ensuring synchronization. Or in another possible implementation, the control coil includes multiple control coils, each of which can control the first switch 141 and the second switch 142. Therefore, as long as one of the multiple control coils can operate normally, the normal opening or closing of the first switch 141 and the second switch 142 can be ensured, thereby reducing the probability of failure.

[0081] In this implementation, the control coil 143 controls the synchronization of the first switch 141 and the second switch 142 , which can reduce implementation difficulty and save costs.

[0082] In one 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.

[0083] In one possible implementation, the first sub-control coil 143a and the second sub-control coil 143b are both electrically connected to the same output terminal of the switch control circuit 120. In this case, 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.

[0084] In one possible implementation, the output end of the switch control circuit 120 includes a first output end and a second output end. The first sub-control coil is electrically connected to the first output end of the switch control circuit 120, and the second sub-control coil is electrically connected to the second output end of the switch control circuit 120. The first sub-control coil 143a and the second sub-control coil 143b can achieve asynchronous operation between the first switch 141 and the second switch 142. For example, a control switch is added before the first output end of the switch control circuit 120. The control switch is controlled by the switch control circuit 120. When the first power source A supplies power to the second power source end 122 of the switch control circuit through the first switch 141, the control switch closes and remains closed until the control circuit controls the first switch 141 to reselect the target power source. When the first power source end 121 of the switch control circuit receives power, current flows from the first output end to the first sub-control coil 143a through the control switch, and the first switch 141 opens. A control switch is added before the second output terminal of the switch control circuit 120. The 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, the control switch is closed and remains closed until the control circuit controls the first switch 141 to reselect the target power supply. When the first power supply terminal 121 of the switch control circuit receives power, current flows from the first output terminal into the second sub-control coil 143b through the control switch, and the second switch 142 is disconnected.

[0085] This implementation allows for independent control of the first switch 141 and the second switch 142. For example, if the first sub-control coil 143a fails, the second switch 142 can continue to operate under the control of the second sub-control coil 143b, thereby ensuring that the second power supply terminal 122 of the switch control circuit can receive the power supply voltage of the second power supply B output by the second switch 142, thereby ensuring the normal operation of the switch control circuit 120.

[0086] In one 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.

[0087] In this embodiment, each output terminal of the second switch circuit 130 is configured with a corresponding sub-power terminal. When the power module 100 is not powered on, if one of the sub-power terminals fails, the other sub-power terminal can still supply power to the switch control circuit 120. Therefore, configuring each output terminal of the second switch circuit 130 with a corresponding sub-power terminal effectively reduces the probability of powering off the switch control circuit 120 due to a sub-power terminal failure.

[0088] 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 inflow terminals of electrical signals (e.g., current signals or voltage signals), and the output terminals of the first switch 141 and the second switch 142 refer to the outflow terminals of electrical signals (e.g., current signals or voltage signals). Therefore, the input terminals of the first switch 141 and the second switch 142 are merely exemplary and not intended to be limiting.

[0089] In one possible implementation, 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 poles 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 poles of the second power supply B in a one-to-one correspondence.

[0090] In one embodiment of the present application, the power module 100 further includes a main power conversion circuit 160, which is configured to provide an operating voltage for a back-end main circuit. The output terminal 113 of the first switching 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.

[0091] In one embodiment of the present application, the switch control circuit 120 is also electrically connected to the main power conversion circuit 160. The switch control circuit 120 uses some components in the main power conversion circuit to form a loop, which can simplify the circuit structure of the switch control circuit.

[0092] The present application also provides an integrated circuit, which includes the power module 100 provided in the above embodiment. The integrated circuit can reduce power consumption and eliminate the EMI filter circuit of the second switch circuit 130, thereby saving space occupied by the power module 100.

[0093] Embodiments of the present application provide a power supply including the power module 100 or the integrated circuit provided in the aforementioned embodiments. This power supply reduces power consumption and eliminates the EMI filter circuit of the second switching circuit 130, thereby saving space occupied by the power module 100 and improving space utilization.

[0094] Embodiments of the present application provide a device comprising the power module 100, the integrated circuit, or the power supply provided in the aforementioned embodiments. This device reduces power consumption and eliminates circuitry associated with auxiliary power supply EMI, thereby conserving space occupied by the power module 100 and improving space utilization.

[0095] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A power module, characterized in that: include: a first switch circuit, wherein a first input end of the first switch circuit is used to be externally connected to a first power source, and a second input end of the first switch circuit is used to be externally connected to a second power source; a switch control circuit, wherein an output end of the first switch circuit is electrically connected to a 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; a second switch circuit, wherein a first input end of the second switch circuit is used to electrically connect to the first power supply, a second input end of the second switch circuit is used to electrically connect to the second power supply, and an output end of the second switch circuit is electrically connected to a second power supply end of the switch control circuit; Wherein, the second switch circuit is used to enable the second power supply end of the switch control circuit to receive power from at least one of the first power supply and the second power supply when the power supply module is not powered on; The second switch circuit is also used to disconnect the electrical connection between the second power supply terminal 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 between the first power supply and the second power supply.

2. The power module according to claim 1, characterized in that: Also includes: A power conversion circuit; an output end of the second switch circuit is electrically connected to a second power end of the switch 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 switch circuit, and the output end of the power conversion circuit is electrically connected to the second power supply end of the switch control circuit; The power conversion circuit is used to convert the received power supply voltage into the operating voltage of the switch control circuit.

3. The power module according to claim 2, characterized in that: The output end of the second switch circuit includes a first output end and a second output end, the first output end of the second switch circuit is used to output the power supply voltage of the first power supply, and the second output end of the second switch 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 switch circuit, the input end of the second sub-power conversion circuit is electrically connected to the second output end of the second switch circuit, the output end of the first sub-power conversion circuit is electrically connected to the second power end of the switch control circuit, and the output end of the second sub-power conversion circuit is electrically connected to the second power end of the switch control circuit.

4. The power module according to claim 1, characterized in that: The second switch circuit is also used to disconnect the electrical connection between the second power supply end of the switch control circuit and the first power supply, and disconnect the electrical connection between the second power supply end of the switch control circuit and the second power supply after the power supply module is powered on.

5. The power module according to claim 1, characterized in that: The switch control circuit is used to control the second switch circuit to maintain a first state when the power module is not powered on; when the second switch circuit maintains the first state, the second power supply end of the switch control circuit receives power from 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 module is powered on; when the second switch circuit maintains the second state, the electrical connection between the second power supply end of the switch control circuit and the target power supply is disconnected.

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

7. The power module according to claim 6, characterized in that: The normally closed relay switch comprises: a first switch, wherein an input end of the first switch is electrically connected to the first power supply, and an output end of the first switch is electrically connected to a second power supply end of the switch control circuit; a second switch, wherein an input end of the second switch is used to be electrically connected to the second power supply, and an output end of the second switch is electrically connected to a second power supply end of the switch control circuit; A control coil, wherein the control coil is electrically connected to an 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.

8. The power module according to claim 7, characterized in that: The control coil is used to control the first switch and the second switch to be opened or closed simultaneously.

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

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

12. A power supply, characterized in that: The power supply comprises the power 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 comprises the power 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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