WO2023116427A1

WO2023116427A1 - Dual-input power supply module, chip, circuit board assembly, and electronic device

Info

Publication number: WO2023116427A1
Application number: PCT/CN2022/137019
Authority: WO
Inventors: 何维; 朱聪; 陈长青; 张滨; 李小龙; 左志岭
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-12-22
Filing date: 2022-12-06
Publication date: 2023-06-29
Also published as: CN116388144A

Abstract

The present application relates to the technical field of power supply, and discloses a dual-input power supply module, a chip, a circuit board assembly, and an electronic device. The dual-input power supply module comprises two power supply inputs which are separately connected to a main converter by means of a switch; a switch control unit is used for controlling, according to the input situations of the two power supply inputs respectively detected by first and second detection circuits, the switch to connect one of first and second power supply inputs to the main converter; the input ends of first and second auxiliary power supplies are respectively connected to the first and second power supply inputs; the input end of a third auxiliary power supply is connected to the bus output end of the main converter, and the output end of the third auxiliary power supply is connected to the power supply end of the main converter and the power supply ends of a plurality of circuit units; in a starting stage, the first and second auxiliary power supplies supply power to the plurality of circuit units; after entering a normal working stage, the third auxiliary power supply supplies power to the plurality of circuit units.

Description

A dual input power supply module, chip, circuit board assembly and electronic equipment

related application

This application claims priority to a Chinese patent application with application number 202111582611.8 filed on December 22, 2021, the entire contents of which are incorporated herein by reference.

technical field

The embodiments of the present application relate to the technical field of power supply, and in particular to a dual-input power supply module, chip, circuit board assembly and electronic equipment.

Background technique

Power supply technology is developing towards high efficiency and miniaturization. In application scenarios that require high reliability of power supply, such as communication fields and data centers, redundant power supply backup power supply is a commonly used power supply method. This method has obvious disadvantages such as a large number of modules and a large footprint. With the goal of reaching carbon peak and carbon neutrality, improving the power conversion efficiency of the data center and reducing the number of power modules to reduce operating investment and power consumption have become the focus of people's concern. In recent years, in order to reduce the number of power supplies, single power supply modules generally use dual input voltages for power supply to achieve redundant backup of power input. The number of power supply modules can be changed from N+N configuration to N+1 configuration, which saves power supply costs and reduces the space occupied by the power supply.

However, there are still problems such as serious reactive power loss and electromagnetic interference between the two auxiliary power supplies in the traditional dual-input power supply module technology.

Contents of the invention

The main purpose of the embodiments of the present application is to provide a dual-input power supply module, a chip, a circuit board assembly, and an electronic device for reducing power loss of the dual-input power supply module and avoiding electromagnetic interference between auxiliary power supplies.

In order to achieve the above object, the embodiment of the present application provides a dual-input power supply module, including: the first power input and the second power input are respectively connected to the main converter through a switch; the switch control unit is used to The detected input of the first power supply and the input of the second power input detected by the second detection circuit control the switch to conduct one of the first power input and the second power input with the main converter; wherein: The dual-input power supply circuit also includes a first auxiliary power supply, a second auxiliary power supply, and a third auxiliary power supply; the input end of the first auxiliary power supply is connected to the first power supply input, and the input end of the second auxiliary power supply is connected to the second power supply input; the third auxiliary power supply The input end of the power supply is connected to the bus bar output end of the main converter, and the output end of the third auxiliary power supply is connected to the power supply end of the main converter and the power supply ends of several circuit units; wherein, the several circuit units include a first detection circuit, a second detection circuit , switch, switch control unit; the first auxiliary power supply, the second auxiliary power supply, and the third auxiliary power supply are configured as follows: in the start-up phase of the dual-input power supply circuit, the first auxiliary power supply and the second auxiliary power supply supply power to several circuit units ; After the dual-input power supply circuit enters the normal working phase, the first auxiliary power supply and the second auxiliary power supply stop supplying power to several circuit units, and the third auxiliary power supply supplies power to several circuit units.

In order to achieve the above object, an embodiment of the present application provides a chip including the above dual-input power supply module.

In order to achieve the above object, an embodiment of the present application provides a circuit board assembly including the above dual-input power supply module.

In order to achieve the above purpose, an embodiment of the present application provides an electronic device including the above dual-input power supply module.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute a limitation to the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the drawings are not limited to scale.

FIG. 1 is a schematic structural diagram of a dual-input power supply module according to an embodiment of the present application;

Fig. 2 is a structural schematic diagram of a traditional dual-input power supply module;

FIG. 3 is a schematic structural diagram of another traditional dual-input power supply module;

Fig. 4 is a schematic diagram of auxiliary power supply in a traditional dual-input power supply module;

Fig. 5 is a schematic diagram of auxiliary power supply in a dual-input power supply module according to an embodiment of the present application;

6 is a schematic structural diagram of a dual-input power supply module according to another embodiment of the present application;

Fig. 7 is a schematic diagram of auxiliary power supply in a dual-input power supply module according to another embodiment of the present application;

Fig. 8 is a schematic structural diagram of a dual-input power supply module according to another embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the various embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present application, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in this application can also be realized. The division of the following implementations is for the convenience of description, and should not constitute any limitation to the specific implementations of the present application, and the implementations can be combined and referenced to each other on the premise of no contradiction.

As used herein, the term "comprising/comprising" refers to the presence of a feature, step or element, but does not exclude the presence or addition of one or more other features, steps or elements. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application.

In addition, in the description of the embodiments of the present application, the terms "first", "second", and "third" are only used for description purposes and to distinguish similar objects, and there is no sequence between the two, nor can they be Read as indicating or implying relative importance.

An embodiment of the present application relates to a dual-input power supply module. The circuit structure diagram of the dual-input power supply module is shown in FIG. 1 .

In this embodiment, the dual-input power module includes: the first power input and the second power input are respectively connected to the main converter through a switch; the switch control unit is used to The situation and the input situation of the second power input detected by the second detection circuit control the switch to conduct one of the first power input and the second power input with the main converter; the dual-input power circuit also includes a first auxiliary power supply, second auxiliary power supply, and third auxiliary power supply; the input end of the first auxiliary power supply is connected to the input of the first power supply, the input end of the second auxiliary power supply is connected to the input of the second power supply; the input end of the third auxiliary power supply is connected to the main converter The output terminal of the bus bar, the output terminal of the third auxiliary power supply is connected to the power supply terminal of the main converter and the power supply terminals of several circuit units; wherein, the several circuit units include a first detection circuit, a second detection circuit, a switch, and a switch control unit; The first auxiliary power supply, the second auxiliary power supply, and the third auxiliary power supply are configured as follows: in the start-up phase of the dual-input power supply circuit, the first auxiliary power supply and the second auxiliary power supply supply power to several circuit units; when the dual-input power supply circuit enters normal operation After a period, the first auxiliary power supply and the second auxiliary power supply stop supplying power to several circuit units, and the third auxiliary power supply supplies power to several circuit units.

The structure of a traditional dual-input power module is generally shown in Figure 2 or Figure 3, which consists of an EMI filter, a switch, an isolated auxiliary power supply, a main converter, and an auxiliary power supply for the main converter. The switch generally adopts a double-pole double-throw switch with a combination of multiple relays, or a single double-pole double-throw relay or contactor. Since the dual input requires insulation and isolation, it cannot be directly connected in parallel to supply power to the power module. Especially in the case where the switch adopts a magnetic latching switch, the initial state of the switch contact cannot be determined. Therefore, it is necessary to control the state of the switch and the state of the input power supply to select and switch, so as to ensure the normal power-on of the dual-input power supply module.

Achieving these functions typically requires two isolated auxiliary power supplies. These two auxiliary power supplies generally need to supply power to the dual-input detection circuit, the switch and the control circuit of the switch. The main converter in the dual-input power module is generally composed of a power factor correction (Power Factor Correction, "PFC") converter and a DC/DC converter. It also needs an auxiliary power circuit for power supply.

In order to meet the power supply requirements of the above functions, the existing auxiliary power supply is generally designed to provide an auxiliary power supply for the input port voltage detection circuit, switch and dual-input switching control circuit, as shown in Figure 4. When the input detection circuit detects that the power supply of one or two inputs is normal, the dual-input control circuit controls the switch to select one input.

Since both the first auxiliary power supply and the second auxiliary power supply need to provide power supply for the switching switch and the input detection circuit, the two work independently and there is power consumption in long-term operation. The common mode voltage generated by the switching noise of the auxiliary power converter will be directly coupled to the input, the two isolated auxiliary power supplies have no power factor correction, and the harmonic interference input of the auxiliary power supply will directly affect the electromagnetic compatibility of the entire dual-input power supply module. (Electro Magnetic Compatibility, referred to as "EMC") indicators. In order to solve the electromagnetic interference (Electromagnetic Interference, "EMI") problem of these two auxiliary power supplies, generally the input of the two auxiliary power supplies and the input terminal of the power module (as shown in Figure 2), or the input side of the auxiliary power supply are added EMI filter circuit (as shown in Figure 3). And this solution will affect the power density of the power supply.

The implementation details of the dual-input power supply module in this embodiment will be described in detail below. The following content is only for the convenience of understanding the implementation details of the solution, and is not necessary for implementing the solution. The specific structure is shown in Figure 1. In this dual-input power module, the first power input 101 and the second power input 102 are respectively connected to the main converter 106 through the switch 103; situation and the input situation of the second power input detected by the second detection circuit 105, control the switch 103 to conduct one of the first power input and the second power input with the main converter; the dual-input power circuit also includes the first An auxiliary power supply 107, a second auxiliary power supply 108, and a third auxiliary power supply 109; the input end of the first auxiliary power supply 107 is connected to the first power supply input 101, and the input end of the second auxiliary power supply 108 is connected to the second power supply input 102; the third auxiliary power supply The input end of the power supply 109 is connected to the PFC bus output end of the main converter 106, and the output end of the third auxiliary power supply 109 is connected to the power supply end of the main converter 106 and the power supply ends of several circuit units; wherein, some circuit units include the first detection circuit 104, the second detection circuit 105, the switch 103, the switch control unit 1010; the first auxiliary power supply 107, the second auxiliary power supply 108, and the third auxiliary power supply 109 are configured to: in the start-up phase of the dual-input power supply circuit, the first The auxiliary power supply 107 and the second auxiliary power supply 108 supply power to several circuit units; after the dual-input power supply circuit enters the normal working phase, the first auxiliary power supply 107 and the second auxiliary power supply 108 stop supplying power to several circuit units, and the third auxiliary power supply 109 Power several circuit units.

It is worth mentioning that the switch control unit involved in the dual-input power supply module provided by this embodiment can be realized by designing a hardware circuit, or by designing a small chip by software. As shown in FIG. 1 , the main converter in the dual-input power module involved in this embodiment may also be composed of a PFC converter and a DC/DC converter. In the dual-input power module involved in this embodiment, an EMI filter may also be provided between the output end of the switch and the input end of the main converter, so as to ensure that the dual-input power module is not affected by electromagnetic interference.

In one example, in the dual-input power supply module, the output terminal of the first auxiliary power supply, the output terminal of the second auxiliary power supply and the bus output terminal of the main converter are combined in parallel to form a combined circuit for supplying power to the third auxiliary power supply The output end is used to connect the combined output end of the third auxiliary power supply to the input end of the third auxiliary power supply. Refer to Figure 5 for a schematic diagram of the auxiliary power supply in the dual-input power module involved in this example. In this example, the first auxiliary power supply and the second auxiliary power supply can be used to provide input voltage for the third auxiliary power supply during the startup phase of the power module. After the output voltage of the third auxiliary power supply is established, the first auxiliary power supply and the second auxiliary power supply are controlled. The power supply stops supplying power. In this example, the output of the third auxiliary power supply is used as the standard for judging whether to control the first auxiliary power supply and the second auxiliary power supply to stop power supply, which can better judge whether the dual-input power supply circuit enters the normal working stage, and make the first and second two auxiliary power supplies work as soon as possible. The power supply stops supplying power, further saving power loss. Moreover, the third auxiliary power supply is always used to supply power to several circuit units, which can avoid negative effects caused by auxiliary circuit switching.

It is worth noting that, after the dual-input power supply circuit enters the normal working stage, controlling the first auxiliary power supply and the second auxiliary power supply to stop supplying power to several circuit units can be realized through hardware design and software design. The way of hardware implementation may be to configure the main converter of the dual-input power supply module as follows: the output voltage of the bus output terminal of the main converter is higher than the output voltage of the output terminal of the first auxiliary power supply and higher than the output voltage of the output terminal of the second auxiliary power supply Voltage. This configuration of the main converter enables the first auxiliary power supply and the second auxiliary power supply to enter a dormant state after the dual-input power supply circuit enters a normal working phase, so that the power supply for several circuit units is switched to be provided by the third auxiliary power supply.

The method of software implementation may be to add an auxiliary power supply control unit to the dual-input power supply module; the auxiliary power supply control unit is respectively connected to the first auxiliary power supply, the second auxiliary power supply, and the third auxiliary power supply; the auxiliary power supply control unit is configured to: After detecting that the third auxiliary power supply receives the voltage output from the bus output terminal of the main converter, control the first auxiliary power supply and the second auxiliary power supply to stop supplying power to several circuit units; wherein, after the dual-input power supply circuit enters the normal working stage, the main The PFC bus output terminal of the converter outputs the voltage. This configuration method for the dual-input power supply module can make the first auxiliary power supply and the second auxiliary power supply enter the dormant state after the dual-input power supply circuit enters the normal working stage, so as to switch the power supply of several circuit units to be provided by the third auxiliary power supply. .

It is worth mentioning that the dual-input power supply module can be configured such that the input end of the first auxiliary power supply is directly connected to the input of the first power supply, and the input end of the second auxiliary power supply is directly connected to the input of the second power supply. Compared with the traditional dual-input power supply module, there is no need to set an EMI filter between the first and second auxiliary power supplies and the input of the first and second power supply, which can improve the efficiency and power density of the whole machine compared with the traditional dual-input power supply module.

In one example, a one-way switch is connected in series between the corresponding output terminal of the dual-input power supply module and the combined output terminal, and the positive pole of the one-way switch is connected to the output terminal, and the negative pole of the one-way switch is connected to the combined output terminal; the corresponding output terminal and combined output terminal, which is one of the following: the output terminal of the first auxiliary power supply and the combined output terminal used to supply power to the third auxiliary power supply; the output terminal of the second auxiliary power supply and the combined output terminal used to supply power to the third auxiliary power supply The combined output terminal of the main converter; the bus output terminal of the main converter and the combined output terminal for supplying power to the third auxiliary power supply; the first output terminal and the first combined output terminal of the first auxiliary power supply; the third auxiliary power supply The first output terminal and the first combined output terminal; the first output terminal and the second combined output terminal of the second auxiliary power supply; the second output terminal and the second combined output terminal of the third auxiliary power supply; the first auxiliary power supply The second output end of the second auxiliary power supply and the third combined output end; the second output end of the second auxiliary power supply and the third combined output end; the third output end of the third auxiliary power supply and the third combined output end combined output terminal; the third output terminal of the first auxiliary power supply and the fourth combined output terminal; the third output terminal of the second auxiliary power supply and the fourth combined output terminal; the first auxiliary power supply The third output terminal of the three auxiliary power supplies and the fourth combining output terminal. In this example, a unidirectional switch is connected in series between the corresponding output terminal and the combined output terminal to prevent the current from flowing backward. The unidirectional switch involved in this example may be an electronic device with unidirectional conduction characteristics such as a diode in actual implementation.

In this embodiment, the first auxiliary power supply and the second auxiliary power supply only provide power during the start-up phase of the input power supply circuit. After the dual-input power supply module enters a normal working stage, the third auxiliary power supply provides power, and the first and second auxiliary power supplies do not need to provide power. Compared with the traditional dual-input power supply module, both auxiliary power supplies need to provide power for the detection circuit and other modules, which can avoid the power loss caused by the long-term independent operation of the two auxiliary power supplies. Moreover, after the dual-input power supply module enters the normal working stage, the first and second auxiliary power supplies are controlled to stop supplying power to the detection circuit and other modules, which can avoid electromagnetic interference caused by simultaneous operation of multiple auxiliary power supplies. Correspondingly, there is no need to configure an EMI filter device at the input port of the auxiliary power supply, so that the efficiency and power density of the whole machine can be improved compared with the traditional dual-input power supply module.

Another embodiment of the present application relates to a dual-input power supply module. The circuit structure diagram of the dual-input power supply module is shown in FIG. 6 .

Refer to FIG. 7 for a schematic diagram of the auxiliary power supply in the dual-input power module involved in this embodiment. In this embodiment, the first auxiliary power supply and the second auxiliary power supply have three output terminals respectively, and the third auxiliary power supply has five output terminals (not all shown in the figure); the first output terminal of the first auxiliary power supply and The first output end of the third auxiliary power supply is connected in parallel to form the first combined output end, and the first combined output end is connected to the power supply end of the first detection circuit; the first output end of the second auxiliary power supply and the third auxiliary power supply The second output end is combined with the circuit to form the second combined output end, and the second combined output end is connected to the power supply end of the second detection circuit (the input detection power supply module shown in Fig. 7 includes the first detection circuit and the second detection circuit , the power supply terminal of the input detection power supply module is connected to the first combined output terminal or the second combined output terminal); the second output terminal of the first auxiliary power supply, the second output terminal of the second auxiliary power supply and the third auxiliary power supply The third output end of the power supply is combined with the circuit to form the third combined output end, and the third combined output end is connected to the power supply end of the switch (as shown in the switch power supply module in Figure 7, the power supply section of the switch power supply module is connected to is the third combined output end); the third output end of the first auxiliary power supply, the third output end of the second auxiliary power supply and the fourth output end of the third auxiliary power supply are combined to form the fourth combined output end , the fourth combined output terminal is connected to the power supply terminal of the switch control unit (as shown in the switching control power supply module in Figure 7, the fourth combined output terminal is connected to the power supply section of the switching control power supply module); the third auxiliary power supply The fifth output terminal of the main converter is connected to the power supply terminal of the main converter (as shown in the main converter power supply module in FIG. 7 ).

In an embodiment, the third auxiliary power supply can also be configured to have six output terminals, that is, the fifth output terminal is connected to the power supply terminal of the PFC converter in the main converter, and the sixth output terminal is connected to the DC/DC in the main converter. power supply side of the converter. The circuit structure diagram of the dual-input power supply module involved in this embodiment is shown in FIG. 8 .

In another configuration, several circuit units can also be divided into two groups, that is, in addition to the detection circuit including the first detection circuit and the second detection circuit, the switch can also include the first switch and the second switch . The transfer switch control unit includes a first transfer switch control unit and a second transfer switch control unit. Two groups of several circuit units are respectively connected with the two power supply inputs and the auxiliary power supply connected thereto.

In this configuration, the third auxiliary power supply has seven output terminals. Except that the output terminals of the first combination and the second combination are still connected to the power supply terminals of the first and second detection circuits, the second output terminal of the first auxiliary power supply and the third output terminal of the third auxiliary power supply can be set in parallel The circuit forms the third combined output terminal, which is connected to the power supply terminal of the first switch; the second output terminal of the second auxiliary power supply and the fourth output terminal of the third auxiliary power supply are combined to form the fourth combined output terminal, which is connected to the fourth combined output terminal. The power supply terminal of the second switch; the third output terminal of the first auxiliary power supply and the fifth output terminal of the third auxiliary power supply are combined in parallel to form the fifth combined output terminal, which is connected to the power supply terminal of the first switch control unit; the second The third output end of the auxiliary power supply and the sixth output end of the third auxiliary power supply are combined in parallel to form the sixth combined output end, which is connected to the power supply end of the second switch control unit; the seventh output end of the third auxiliary power supply is connected to the main The power supply terminal of the converter. This configuration can provide better isolation between the two power inputs, further avoiding electromagnetic interference in the dual-input power module.

In the above configuration of dividing several circuit units into two groups, the third auxiliary power supply can also be configured to have eight output terminals. In this configuration, compared with the above power supply method, the seventh output terminal of the third auxiliary power supply can be connected to the power supply terminal of the PFC converter in the main converter, and the eighth output terminal of the third auxiliary power supply can be connected to the main converter. The power supply terminal of the DC/DC converter.

In this embodiment, after the dual-input power supply circuit enters the normal working stage, controlling the first auxiliary power supply and the second auxiliary power supply to stop supplying power to several circuit units can also be realized by hardware design and software design. The implementation manner is the same as the technical details involved in the previous implementation manner, and is also applicable in this implementation manner, so details are not repeated here.

In this embodiment, the first auxiliary power supply and the second auxiliary power supply only provide power during the start-up phase of the input power supply circuit. After the dual-input power supply module enters a normal working stage, the third auxiliary power supply provides power, and the first and second auxiliary power supplies do not need to provide power. Compared with the traditional dual-input power supply module, both auxiliary power supplies need to provide power for the detection circuit and other modules, which can avoid the power loss caused by the long-term independent operation of the two auxiliary power supplies. Moreover, after the first and second auxiliary power supplies stop supplying power, the third auxiliary power supply supplies power to modules such as the detection circuit, which can ensure stable input of these circuit units.

It is worth mentioning that, in the above embodiments of the present application, units that are not closely related to solving the technical problems proposed in the present application are not introduced, but this does not mean that there are no other units in this embodiment.

An embodiment of the present application relates to a chip including the above-mentioned dual-input power supply module. The first auxiliary power supply and the second auxiliary power supply of the dual-input power supply module in the chip provided by this embodiment only provide power during the start-up phase of the input power supply circuit. After the dual-input power supply module enters a normal working stage, the third auxiliary power supply provides power, and the first and second auxiliary power supplies do not need to provide power. Compared with the traditional dual-input power supply module, both auxiliary power supplies need to provide power for the detection circuit and other modules, which can avoid the power loss caused by the long-term independent operation of the two auxiliary power supplies. Moreover, after the dual-input power supply module enters the normal working stage, the first and second auxiliary power supplies are controlled to stop supplying power to the detection circuit and other modules, which can avoid electromagnetic interference caused by the simultaneous operation of the two auxiliary power supplies. Correspondingly, there is no need to configure an EMI filter device at the input port of the auxiliary power supply, so that the efficiency and power density of the whole machine can be improved compared with the traditional dual-input power supply module.

Another embodiment of the present application relates to a circuit board assembly including the above dual-input power supply module. The dual-input power module in the circuit board assembly provided in this embodiment includes the dual-input power module involved in the foregoing embodiments, and has corresponding functional modules and beneficial effects of the dual-input power module, which will not be repeated here. For technical details not exhaustively described in this embodiment, refer to the relevant details of the dual-input power supply module provided in the embodiment of this application.

Another embodiment of the present application relates to an electronic device including the above-mentioned dual-input power supply module. The electronic equipment provided in this embodiment includes the dual-input power module involved in the foregoing embodiments, and has corresponding functional modules and beneficial effects of the dual-input power module, which will not be repeated here. The electronic device involved in this implementation manner may be a power supply device including the above-mentioned dual-input power supply module. For technical details not exhaustively described in this embodiment, refer to the relevant details of the dual-input power supply module provided in the embodiment of this application.

The above-mentioned embodiments are provided for those of ordinary skill in the art to implement and use this application. Those of ordinary skill in the art can make various modifications or changes to the above-mentioned embodiments without departing from the inventive idea of this application. Therefore, this The protection scope of the application is not limited by the above-mentioned embodiments, but should conform to the maximum scope of the innovative features mentioned in the claims.

Claims

A dual-input power supply module, comprising: the first power input and the second power input are respectively connected to the main converter through a switch; the switch control unit is used to detect the first power input and the second The input situation of the second power input detected by the second detection circuit controls the switch to conduct one of the first power input and the second power input with the main converter; wherein:

The dual-input power supply circuit also includes a first auxiliary power supply, a second auxiliary power supply, and a third auxiliary power supply;

The input terminal of the first auxiliary power supply is connected to the first power supply input, and the input terminal of the second auxiliary power supply is connected to the second power supply input;

The input terminal of the third auxiliary power supply is connected to the busbar output terminal of the main converter, and the output terminal of the third auxiliary power supply is connected to the power supply terminal of the main converter and the power supply terminals of several circuit units; wherein, the Several circuit units include the first detection circuit, the second detection circuit, the switch, and the switch control unit;

The first auxiliary power supply, the second auxiliary power supply, and the third auxiliary power supply are configured such that: during the start-up phase of the dual-input power supply circuit, the first auxiliary power supply and the second auxiliary power supply are After the dual-input power supply circuit enters the normal working stage, the first auxiliary power supply and the second auxiliary power supply stop supplying power to the several circuit units, and the third auxiliary power supply is the Several circuit units described above are powered.
The dual-input power supply module according to claim 1, wherein the output terminal of the first auxiliary power supply, the output terminal of the second auxiliary power supply and the bus output terminal of the main converter form a parallel circuit for The combined output end of the third auxiliary power supply, the combined output end for supplying power to the third auxiliary power is connected to the input end of the third auxiliary power supply.
The dual-input power supply module according to claim 1, wherein the first auxiliary power supply and the second auxiliary power supply respectively have three output terminals, and the third auxiliary power supply has five output terminals;

The first output terminal of the first auxiliary power supply and the first output terminal of the third auxiliary power supply are combined in parallel to form a first combined output terminal, and the first combined output terminal is connected to the first detection circuit power supply terminal;

The first output terminal of the second auxiliary power supply and the second output terminal of the third auxiliary power supply are combined in parallel to form a second combined output terminal, and the second combined output terminal is connected to the second detection circuit. power supply terminal;

The second output terminal of the first auxiliary power supply, the second output terminal of the second auxiliary power supply, and the third output terminal of the third auxiliary power supply are combined in parallel to form a third combined output terminal, and the third The combined output end is connected to the power supply end of the switch;

The third output end of the first auxiliary power supply, the third output end of the second auxiliary power supply, and the fourth output end of the third auxiliary power supply are combined in parallel to form a fourth combined output end, and the fourth The combined output end is connected to the power supply end of the switch control unit;

The fifth output terminal of the third auxiliary power supply is connected to the power supply terminal of the main converter.
The dual-input power module according to claim 2 or 3, wherein the main converter is configured such that: the output voltage of the bus output terminal of the main converter is higher than the output voltage of the output terminal of the first auxiliary power supply and higher than the output voltage of the output terminal of the second auxiliary power supply.
The dual-input power supply module according to any one of claims 1 to 3, wherein the dual-input power supply module further comprises an auxiliary power supply control unit;

The auxiliary power supply control unit is respectively connected to the first auxiliary power supply, the second auxiliary power supply, and the third auxiliary power supply; the auxiliary power supply control unit is configured to: detect that the third auxiliary power supply receives Controlling the first auxiliary power supply and the second auxiliary power supply to stop supplying power to the plurality of circuit units after the voltage output by the bus output terminal of the main converter;

Wherein, after the dual-input power supply circuit enters a normal working stage, the busbar output terminal of the main converter outputs a voltage.
The dual-input power supply module according to any one of claims 1 to 3, wherein the input end of the first auxiliary power supply is directly connected to the input of the first power supply, and the input end of the second auxiliary power supply is connected to the input of the first auxiliary power supply. directly connected to the second power input.
The dual-input power module according to claim 2 or 3, wherein a unidirectional switch is connected in series between the corresponding output terminal and the combined output terminal, and the anode of the unidirectional switch is connected to the output terminal, and the unidirectional switch The negative electrode of the switch is connected to the combined output terminal;

The corresponding output terminal and the combined output terminal are one of the following:

the output terminal of the first auxiliary power supply and the combined output terminal for supplying power to the third auxiliary power supply;

The output terminal of the second auxiliary power supply and the combined output terminal for supplying power to the third auxiliary power supply;

The busbar output terminal of the main converter and the combined output terminal for supplying power to the third auxiliary power supply;

the first output terminal of the first auxiliary power supply and the first combining output terminal;

the first output terminal of the third auxiliary power supply and the first combining output terminal;

the first output terminal of the second auxiliary power supply and the second combining output terminal;

the second output terminal of the third auxiliary power supply and the second combining output terminal;

the second output terminal of the first auxiliary power supply and the third combining output terminal;

the second output terminal of the second auxiliary power supply and the third combining output terminal;

a third output terminal of the third auxiliary power supply and the third combining output terminal;

the third output terminal of the first auxiliary power supply and the fourth combining output terminal;

the third output terminal of the second auxiliary power supply and the fourth combining output terminal;

The third output terminal of the third auxiliary power supply and the fourth combining output terminal.
A chip, comprising: the dual-input power supply module according to any one of claims 1-7.
A circuit board assembly, comprising: the dual-input power supply module according to any one of claims 1-7.
An electronic device, comprising: the dual-input power supply module according to any one of claims 1-7.