Power supply circuit and power supply device

Abstract

A power supply circuit and a power supply device. The power supply circuit comprises a first voltage conversion module, a first switch module, a second voltage conversion module, a second switch module and a control module. A first end of the first switch module is coupled to an output end of the first voltage conversion module, and a second end of the first switch module is coupled to a first output end of the power supply circuit; a first end of the second switch module is coupled to the output end of the first voltage conversion module, and a second end of the second switch module is coupled to an output end of the second voltage conversion module; and the control module is respectively coupled to the first voltage conversion module, the first switch module, the second voltage conversion module and the second switch module, wherein in response to the first output end being coupled to a first load, the control module controls the first switch module and the second switch module to be turned on, such that both the first voltage conversion module and the second voltage conversion module supply power to the first load. In this way, the hardware cost of the power supply circuit is effectively reduced.

Description

Power supply circuit and power supply device

[0001]

Related Application Cross Reference

[0002] The present application claims priority from Chinese Patent Application No. 2024113897004 filed on September 30, 2024 in China, the contents of which are incorporated herein by reference in its entirety.

[0003] The present application claims priority from Chinese Patent Application No. 2024224087947 filed on September 30, 2024 in China, the contents of which are incorporated herein by reference in its entirety.

TECHNICAL FIELD

[0004] The present application relates to the technical field of power supply, in particular to a power supply circuit and a power supply device.

BACKGROUND

[0005] The power supply device can convert alternating current into direct current to supply power to the corresponding load, or the power supply device can convert direct current into direct current to supply power to the corresponding load.

[0006] The current power supply device with multiple output terminals is controlled individually for each output terminal, resulting in a large transformer and main power device used in each power supply circuit, which has a relatively high cost. In addition, if each output needs to be full load when outputting at a single port, the devices need to be designed for full load. The more output ports, the higher the cost.

SUMMARY

[0007] The power supply circuit and the power supply device provided by the present application effectively reduce the hardware cost of the power supply circuit.

[0008] To solve the above technical problems, the present application provides a power supply circuit, which comprises: a first voltage conversion module; a first switch module, the first end of the first switch module being coupled to the output end of the first voltage conversion module, and the second end of the first switch module being coupled to the first output end of the power supply circuit; a second voltage conversion module; a second switch module, the first end of the second switch module being coupled to the output end of the first voltage conversion module, and the second end of the second switch module being coupled to the output end of the second voltage conversion module; a control module, which is coupled to the first voltage conversion module, the first switch module, the second voltage conversion module and the second switch module respectively; wherein, in response to the first output end being coupled to the first load, the control module controls the first switch module and the second switch module to be conductive, so that the first voltage conversion module and the second voltage conversion module jointly supply power to the first load.

[0009] The power supply circuit further comprises a third voltage conversion module; a first end of a third switch module is coupled to an output end of the third voltage conversion module, and a second end of the third switch module is coupled to an output end of the first voltage conversion module; the control module, in response to the first output end being coupled to the first load, controls the first switch module, the second switch module and the third switch module to be turned on, so that the first voltage conversion module, the second voltage conversion module and the third voltage conversion module jointly supply power to the first load.

[0010] After the first output end is coupled to the first load, the control module, in response to the second output end of the power supply circuit being coupled to the second load, controls the second switch module to be turned off, so that the second voltage conversion module supplies power to the second load, and the first voltage conversion module and the third voltage conversion module jointly supply power to the first load.

[0011] After the first output end is coupled to the first load and the second output end is coupled to the second load, the control module, in response to the third output end of the power supply circuit being coupled to the third load, controls the third switch module to be turned off, so that the third voltage conversion module supplies power to the third load.

[0012] The power supply circuit further comprises a fourth switch module, a first end of the fourth switch module is coupled to an output end of the second voltage conversion module, and a second end of the fourth switch module is coupled to the second output end of the power supply circuit; a fifth switch module, a first end of the fifth switch module is coupled to an output end of the third voltage conversion module, and a second end of the fifth switch module is coupled to the third output end of the power supply circuit; the first switch module comprises a first transistor, a first end of the first transistor is coupled to the output end of the first voltage conversion module, a second end of the first transistor is coupled to the first output end of the power supply circuit, and a control end of the first transistor is coupled to the control module; the fourth switch module comprises a second transistor, a first end of the second transistor is coupled to the output end of the second voltage conversion module, a second end of the second transistor is coupled to the second output end of the power supply circuit, and a control end of the second transistor is coupled to the control module; the second switch module comprises a third transistor and a fourth transistor, a first end of the third transistor is coupled to the output end of the first voltage conversion module, a second end of the third transistor is coupled to a first end of the fourth transistor, a second end of the fourth transistor is coupled to the output end of the second voltage conversion module, and control ends of the third transistor and the fourth transistor are coupled to the control module; the fifth switch module comprises a fifth transistor, a first end of the fifth transistor is coupled to the output end of the third voltage conversion module, and a second end of the fifth transistor is coupled to the third output end of the power supply circuit; the fourth switch module comprises a sixth transistor and a seventh transistor, a first end of the sixth transistor is coupled to the output end of the first voltage conversion module, a second end of the sixth transistor is coupled to a first end of the seventh transistor, and a second end of the seventh transistor is coupled to the output end of the third voltage conversion module.

[0013] The first body diode is coupled to the second end of the fourth transistor, and the cathode of the first body diode is coupled to the first end of the fourth transistor; the second body diode is coupled to the second end of the seventh transistor, and the cathode of the second body diode is coupled to the first end of the seventh transistor; the control module is coupled to the first output end in response to the first load, controls the first transistor, the third transistor and the sixth transistor to be turned on, so that the first voltage conversion module, the second voltage conversion module and the third voltage conversion module supply power to the first load together.

[0014] The control module is coupled to the second output end in response to the second load after the first output end is coupled to the first load, controls the third transistor to be turned off and the second transistor to be turned on, so that the second voltage conversion module supplies power to the second load, and the first voltage conversion module and the third voltage conversion module supply power to the first load together.

[0015] The control module is coupled to the third output end in response to the third load after the first output end is coupled to the first load and the second output end is coupled to the second load, controls the sixth transistor to be turned off and the fifth transistor to be turned on, so that the third voltage conversion module supplies power to the third load.

[0016] The control module is coupled to the third output end in response to the third load after the first output end is coupled to the first load, controls the sixth transistor to be turned off and the fifth transistor to be turned on, so that the third voltage conversion module supplies power to the third load, and the first voltage conversion module and the second voltage conversion module supply power to the first load together.

[0017] When only the first output end is coupled to the first load, the control module controls the output voltage of the second voltage conversion module to be smaller than the output voltage of the first voltage conversion module.

[0018] The control module controls the output voltage of the third voltage conversion module to be smaller than the output voltage of the first voltage conversion module.

[0019] When only the first output end is coupled to the first load, the output voltage of the second voltage conversion module is smaller than the output voltage of the first voltage conversion module by 0.1-0.4V, and / or the output voltage of the third voltage conversion module is smaller than the output voltage of the first voltage conversion module by 0.1-0.4V.

[0020] The control module monitors the output current of the first voltage conversion module and the second voltage conversion module, and adjusts the output voltage of the first voltage conversion module and the second voltage conversion module according to the output current.

[0021] The control module monitors the first output current of the first voltage conversion module, the second output current of the second voltage conversion module, and the third output current of the third voltage conversion module, and in response to one of the first output current, the second output current, and the third output current being greater than the first threshold value and the difference between the other two being less than the second threshold value and being less than one, the control module lowers the output voltage corresponding to the one; in response to the first current being greater than the second current and the second current being greater than the third current among the first output current, the second output current, and the third output current, the control module lowers the output voltage corresponding to the first one and raises the output voltage corresponding to the third one.

[0022] To solve the above technical problems, the application provides a power supply device, which comprises the power supply circuit as described above.

[0023] The power supply circuit and the power supply device provided by the application use the parallel connection scheme of multiple voltage conversion modules to realize multiple parallel connection, so as to realize single-path full-load function by using multiple voltage conversion modules, which can effectively reduce the design requirements for devices and save the hardware cost of the power supply circuit and the power supply device. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort. Among them:

[0025] FIG. 1 is a structural schematic diagram of an embodiment of the power supply circuit provided by the application;

[0026] FIG. 2 is a structural schematic diagram of another embodiment of the power supply circuit provided by the application;

[0027] FIG. 3 is a structural schematic diagram of another embodiment of the power supply circuit provided by the application;

[0028] FIG. 4 is a structural schematic diagram of another embodiment of the power supply circuit provided by the application;

[0029] FIG. 5 is a structural schematic diagram of another embodiment of the power supply circuit provided by the application;

[0030] FIG. 6 is a structural schematic diagram of another embodiment of the power supply circuit provided by the application;

[0031] FIG. 7 is a structural schematic diagram of another embodiment of the power supply circuit provided by the application;

[0032] FIG. 8 is a structural schematic diagram of another embodiment of the power supply circuit provided by the application;

[0033] Fig. 9 is a structural schematic diagram of an embodiment of the power supply device provided in the present application. DETAILED DESCRIPTION

[0034] The present application will be further described below in conjunction with the drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustrating the present application, but not for limiting the scope of the present application. Similarly, the following embodiments are only part of the embodiments of the present application, but not all the embodiments of the present application, and all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of the present application.

[0035] In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited. The terms "first", "second", "third" in the embodiments of the present application are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" can explicitly or implicitly include at least one of the features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only for explaining the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. The terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or components inherent to the process, method, product or device.

[0036] In this document, reference to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. Those skilled in the art will appreciate from the present description that embodiments described herein can be combined with other embodiments in various ways.

[0037] The power supply device can convert alternating current into direct current to power the corresponding load, or the power supply device can convert direct current into direct current to power the corresponding load.

[0038] The current multi-output power supply device is controlled separately for each output, resulting in a large transformer and main power device used for each power supply circuit, which is relatively high in cost. In addition, if each path needs to output at full load when the output is single, the device needs to be designed at full load, and the more the output ports, the higher the cost.

[0039] Based on this, the application proposes to adopt a parallel scheme of multiple voltage conversion modules, to realize multiple parallel machines, so as to realize single-path full-load function by using multiple voltage conversion modules, which can effectively reduce the design requirements for devices and save the hardware cost of power supply circuit and power supply equipment. For details, please refer to any of the following embodiments.

[0040] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of an embodiment of the power supply circuit provided by the application. The power supply circuit 100 includes a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a fourth switch module K20, a second switch module K30, and a control module (not shown in the figure).

[0041] In some embodiments, the first voltage conversion module 10 can be an AC-DC module configured to receive alternating current and output direct current.

[0042] In some embodiments, the first voltage conversion module 10 can be a DC-DC module configured to receive direct current and output direct current.

[0043] The first end of the first switch module K10 is coupled to the output end of the first voltage conversion module 10, and the second end of the first switch module K10 is coupled to the first output end A of the power supply circuit 100.

[0044] In some embodiments, the second voltage conversion module 20 can be an AC-DC module configured to receive alternating current and output direct current.

[0045] In some embodiments, the second voltage conversion module 20 can be a DC-DC module configured to receive direct current and output direct current.

[0046] The first end of the fourth switch module K20 is coupled to the output end of the second voltage conversion module 20, and the second end of the fourth switch module K20 is coupled to the second output end B of the power supply circuit 100.

[0047] The first end of the second switch module K30 is coupled to the output end of the first voltage conversion module 10, and the second end of the second switch module K30 is coupled to the output end of the second voltage conversion module 20.

[0048] The control module is coupled to the first voltage conversion module 10, the first switch module K10, the second voltage conversion module 20, the fourth switch module K20, and the second switch module K30, respectively.

[0049] In some embodiments, the first switch module K10, the fourth switch module K20, and the second switch module K30 can be composed of elements with switching performance such as relays and transistors.

[0050] In some embodiments, the output end of the power supply circuit 100 is provided with a corresponding protocol chip coupled to the control circuit. The protocol chip detects when the output end is coupled to a load, interacts with the load, and sets a corresponding set voltage. The set voltage is used to instruct the corresponding voltage conversion module of the protocol chip to output a corresponding output voltage. The protocol chip can interact with the load to feed back to the load the size of the power that the output end can output.

[0051] The power supply circuit 100 of the present embodiment has the following power supply modes:

[0052] Firstly, only the first output end A is coupled to a load. Illustratively, in response to the first output end A being coupled to a first load, the control module controls the first switch module K10 and the second switch module K30 to be conductive, so that the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load. At this time, the fourth switch module K20 remains non-conductive. In this process, the voltage output by the first voltage conversion module 10 needs to be higher than the voltage output by the second voltage conversion module 20, so as to avoid causing a downtime during full load dynamics. That is, when parallel power supply is needed, the output voltage of the corresponding voltage conversion module of the parallel power supply needs to be higher than the output voltage of the remaining voltage conversion modules.

[0053] Secondly, the first output end A is coupled to a load first, and the second output end B is coupled to a load later. Illustratively, after the first output end A is coupled to a first load, in response to the second output end B being coupled to a second load, the control module controls the fourth switch module K20 to be conductive and the second switch module K30 to be non-conductive, so that the first voltage conversion module 10 supplies power to the first load and the second voltage conversion module 20 supplies power to the second load. At this time, the first switch module K10 remains conductive.

[0054] Thirdly, only the second output end B is coupled to a load. Illustratively, in response to the second output end B being coupled to a second load, the control module controls the fourth switch module K20 and the second switch module K30 to be conductive, so that the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the second load. At this time, the first switch module K10 remains non-conductive. In this process, the voltage output by the first voltage conversion module 10 needs to be lower than the voltage output by the second voltage conversion module 20, so as to avoid causing a downtime during full load dynamics.

[0055] Fourthly, the second output end B is coupled to a load first, and the first output end A is coupled to a load later. Illustratively, after the second output end B is coupled to a second load, in response to the first output end A being coupled to a first load, the control module controls the first switch module K10 to be conductive and the second switch module K30 to be non-conductive, so that the first voltage conversion module 10 supplies power to the first load and the second voltage conversion module 20 supplies power to the second load. At this time, the fourth switch module K20 remains conductive.

[0056] In some embodiments, when any output end is coupled with a load, the power required by the load can be acquired first, and then the voltage conversion module for supplying power to the load is determined. For example, if the power required by the load exceeds the power of one voltage conversion module, a parallel connection scheme can be used to supply power to the load by two or three voltage conversion modules.

[0057] In the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each switch module, so as to accurately supply power to the load.

[0058] In the embodiment, the parallel connection scheme of multiple voltage conversion modules is used, and the switch modules involved in parallel connection are controlled by controlling the output voltage of the main road and bypass of parallel connection and the output time of the bypass, so as to achieve no backflow, realize the function of full load without downtime of the whole machine, and when the voltage conversion module of the power supply circuit 100 is an AC-DC module, the power supply circuit 100 does not need to use a DC-DC module, the power supply efficiency is obviously improved, the heat is reduced, and the hardware cost of the power supply circuit is effectively reduced. That is, in the embodiment, double-output power supply and double-parallel connection to supply power to the same load can be realized.

[0059] Referring to FIG. 2, FIG. 2 is a structural schematic diagram of another embodiment of the power supply circuit provided by the present application. The power supply circuit 100 includes a first voltage conversion module 10, a first transistor Q1, a second voltage conversion module 20, a second transistor Q4, a third transistor Q2, a fourth transistor Q3, and a control module (not shown in the figure).

[0060] The first end of the first transistor Q1 is coupled with the output end of the first voltage conversion module 10, the second end of the first transistor Q1 is coupled with the first output end A of the power supply circuit 100, and the control end of the first transistor Q1 is coupled with the control module.

[0061] The first end of the second transistor Q4 is coupled with the output end of the second voltage conversion module 20, the second end of the second transistor Q4 is coupled with the second output end B of the power supply circuit 100, and the control end of the second transistor Q4 is coupled with the control module.

[0062] The first end of the third transistor Q2 is coupled with the output end of the first voltage conversion module 10, the second end of the third transistor Q2 is coupled with the first end of the fourth transistor Q3, the second end of the fourth transistor Q3 is coupled with the output end of the second voltage conversion module 20, and the control ends of the third transistor Q2 and the fourth transistor Q3 are coupled with the control module.

[0063] In some embodiments, the control module controls the first transistor Q1, the third transistor Q2 and the fourth transistor Q3 to be turned on in response to the first output end A coupling the first load, so that the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load.

[0064] The fourth transistor Q3 has a body diode, an anode of the body diode being coupled to the output end of the second voltage conversion module 20, and a cathode of the body diode being coupled to the second end of the third transistor Q2.

[0065] The power supply circuit 100 of the present embodiment has the following power supply modes:

[0066] The first mode: only the first output end A is coupled to the load. For example, the control module controls the first transistor Q1 and the third transistor Q2 to be turned on in response to the first output end A coupling the first load. At this time, the output voltage of the first voltage conversion module 10 is pulled down due to the connection of the first load, and the second voltage conversion module 20 can supply power to the first load through the body diode of the fourth transistor Q3. Further, after detecting that the second voltage conversion module 20 has an output current, the control module controls the fourth transistor Q3 to be turned on, and the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load. At this time, the second transistor Q4 remains off.

[0067] The second mode: the first output end A is coupled to the load first, and the second output end B is coupled to the load later. For example, after the first output end A is coupled to the first load, the control module controls the second transistor Q4 to be turned on and the third transistor Q2 and the fourth transistor Q3 to be off in response to the second output end B coupling the second load, so that the first voltage conversion module 10 supplies power to the first load and the second voltage conversion module 20 supplies power to the second load. At this time, the first transistor Q1 remains on.

[0068] The third mode: only the second output end B is coupled to the load. For example, the control module controls the second transistor Q4 and the fourth transistor Q3 to be turned on in response to the second output end B coupling the second load. At this time, the output voltage of the second voltage conversion module 20 is pulled down due to the connection of the second load, and the first voltage conversion module 10 can supply power to the second load through the body diode of the third transistor Q2. Further, after detecting that the first voltage conversion module 10 has an output current, the control module controls the third transistor Q2 to be turned on, and the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the second load. At this time, the first transistor Q1 remains off. The anode of the body diode of the third transistor Q2 is coupled to the output end of the first voltage conversion module 10, and the cathode of the body diode of the third transistor Q2 is coupled to the first end of the fourth transistor Q3.

[0069] The fourth kind: the second output end B is coupled with the load first, and the first output end A is coupled with the load later. Exemplarily, after the second output end B is coupled with the second load, the control module controls the first transistor Q1 to be turned on, and the third transistor Q2 and the fourth transistor Q3 to be turned off, in response to the first output end A being coupled with the first load, so as to make the first voltage conversion module 10 supply power to the first load, and the second voltage conversion module 20 supply power to the second load. At this time, the second transistor Q4 remains turned on.

[0070] In the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0071] In the embodiment, the parallel connection scheme of the multiple voltage conversion modules is adopted, the transistors involved in the parallel connection are controlled by controlling the output voltage of the main road and the bypass and the output time of the bypass, so as to achieve the non-inverted filling situation, to realize the function of full-load output without machine downtime. When the voltage conversion module of the power supply circuit 100 is an AC-DC module, a DC-DC module is not needed in the power supply circuit 100, the power supply efficiency is obviously improved, the heat is reduced, and the hardware cost of the power supply circuit is effectively reduced. That is, in the embodiment, double-output power supply and double-parallel connection to the same load can be realized.

[0072] Referring to FIG. 3, FIG. 3 is a structural schematic diagram of another embodiment of the power supply circuit provided by the present application. The power supply circuit 100 includes: a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a fourth switch module K20, a second switch module K30, a third voltage conversion module 30, a fifth switch module K40, a third switch module K50, and a control module (not shown in the figure).

[0073] The first voltage conversion module 10 is configured to receive alternating current and output direct current.

[0074] The first end of the first switch module K10 is coupled with the output end of the first voltage conversion module 10, and the second end of the first switch module K10 is coupled with the first output end A of the power supply circuit 100.

[0075] The second voltage conversion module 20 is configured to receive alternating current and output direct current.

[0076] The first end of the fourth switch module K20 is coupled with the output end of the second voltage conversion module 20, and the second end of the fourth switch module K20 is coupled with the second output end B of the power supply circuit 100.

[0077] The first end of the second switch module K30 is coupled with the output end of the first voltage conversion module 10, and the second end of the second switch module K30 is coupled with the output end of the second voltage conversion module 20.

[0078] In some embodiments, the third voltage conversion module 30 can be an AC-DC module configured to receive AC power and output DC power.

[0079] In some embodiments, the third voltage conversion module 30 can be a DC-DC module configured to receive DC power and output DC power.

[0080] The first end of the fifth switch module K40 is coupled to the output end of the third voltage conversion module 30, and the second end of the fifth switch module K40 is coupled to the third output end C of the power supply circuit 100.

[0081] The first end of the third switch module K50 is coupled to the output end of the third voltage conversion module 30, and the second end of the third switch module K50 is coupled to the output end of the first voltage conversion module 10.

[0082] The control module is coupled to the first voltage conversion module 10, the first switch module K10, the second voltage conversion module 20, the fourth switch module K20, the second switch module K30, the third voltage conversion module 30, the fifth switch module K40 and the third switch module K50, respectively.

[0083] The power supply circuit 100 of the present embodiment has the following power supply modes:

[0084] The first output end A is coupled to the load. For example, in response to the first output end A being coupled to the first load, the control module controls the first switch module K10, the second switch module K30 and the third switch module K50 to be conductive, and the fourth switch module K20 and the fifth switch module K40 to be non-conductive, so that the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 collectively supply power to the first load.

[0085] The first output end A is coupled to the load first, and the second output end B is coupled to the load second. For example, after the first output end A is coupled to the first load (after the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 collectively supply power to the first load), in response to the second output end B being coupled to the second load, the control module controls the second switch module K30 to be non-conductive and the fourth switch module K20 to be conductive, so that the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 collectively supply power to the first load. At this time, the first switch module K10 and the third switch module K50 remain conductive, and the fifth switch module K40 remains non-conductive.

[0086] Third: the first output end A is coupled with the load first, the second output end B is coupled with the load second, and the third output end C is coupled with the load third. Exemplarily, after the first output end A is coupled with the first load and the second output end B is coupled with the second load (after the second voltage conversion module 20 supplies power to the second load and the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the first load together), the control module controls the third switch module K50 to be off and the fifth switch module K40 to be on in response to the third output end C being coupled with the third load, so that the third voltage conversion module 30 supplies power to the third load. At this time, the first switch module K10 and the fourth switch module K20 remain on, and the second switch module K30 remains off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0087] Fourth: the first output end A is coupled with the load first, and the third output end C is coupled with the load third. Exemplarily, after the first output end A is coupled with the first load, the control module controls the third switch module K50 to be off and the fifth switch module K40 to be on in response to the third output end C being coupled with the third load, so that the third voltage conversion module 30 supplies power to the third load and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the first load together. At this time, the first switch module K10 and the second switch module K30 remain on, and the fourth switch module K20 remains off.

[0088] Fifth: the first output end A is coupled with the load first, the third output end C is coupled with the load third, and the second output end B is coupled with the load second. Exemplarily, after the first output end A is coupled with the first load and the third output end C is coupled with the third load, the control module controls the second switch module K30 to be off and the fourth switch module K20 to be on in response to the second output end B being coupled with the second load, so that the second voltage conversion module 20 supplies power to the second load. At this time, the first switch module K10 and the fourth switch module K20 remain on, and the third switch module K50 remains off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0089] Sixth: only the second output end B is coupled with the load. Exemplarily, the control module controls the fourth switch module K20, the second switch module K30 and the third switch module K50 to be on in response to the second output end B being coupled with the second load, so that the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 supply power to the second load together. At this time, the first switch module K10 and the fifth switch module K40 remain off.

[0090] The seventh: the second output end B is coupled to the load first, and the first output end A is coupled to the load later. Exemplarily, after the second output end B is coupled to the second load, the control module responds to the first output end A coupled to the first load, controls the second switch module K30 to be off, and the first switch module K10 to be on, so as to make the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the first load together. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the first load. At this time, the fifth switch module K40 remains off, and the third switch module K50 remains on.

[0091] The eighth: the second output end B is coupled to the load first, the first output end A is coupled to the load later, and the third output end C is coupled to the load again. Exemplarily, after the second output end B is coupled to the second load, and the first output end A is coupled to the first load, the control module responds to the third output end C coupled to the third load, controls the third switch module K50 to be off, and the fifth switch module K40 to be on, so as to make the third voltage conversion module 30 supply power to the third load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0092] The ninth: the second output end B is coupled to the load first, and the third output end C is coupled to the load later. Exemplarily, after the second output end B is coupled to the second load, the control module responds to the third output end C coupled to the third load, controls the third switch module K50 to be off, and the fifth switch module K40 to be on, so as to make the third voltage conversion module 30 supply power to the third load. That is, at this time, the third voltage conversion module 30 supplies power to the third load, the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load.

[0093] The tenth: the second output end B is coupled to the load first, the third output end C is coupled to the load later, and the first output end A is coupled to the load again. After the second output end B is coupled to the second load, and the third output end C is coupled to the third load, the control module responds to the first output end A coupled to the first load, controls the second switch module K30 to be off, and the first switch module K10 to be on, so as to make the first voltage conversion module 10 supply power to the first load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0094] Eleventh: only the third output end C is coupled with the load. Illustratively, in response to the third output end C being coupled with the third load, the control module controls the first switch module K10 and the fourth switch module K20 to be off, and the second switch module K30, the third switch module K50 and the fifth switch module K40 to be on, so that the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 jointly supply power to the third load.

[0095] Twelfth: the third output end C is coupled with the load first, and the first output end A is coupled with the load later. Illustratively, in some embodiments, after the third output end C is coupled with the third load, in response to the first output end A being coupled with the first load, the control module controls the third switch module K50 to be off and the first switch module K10 to be on, so that the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load. That is, at this time, the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0096] Thirteenth: the third output end C is coupled with the load first, the first output end A is coupled with the load later, and the second output end B is coupled with the load again. Illustratively, after the third output end C is coupled with the third load and the first output end A is coupled with the first load, in response to the second output end B being coupled with the second load, the control module controls the second switch module K30 to be off and the fourth switch module K20 to be on, so that the second voltage conversion module 20 supplies power to the second load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0097] Fourteenth: the third output end C is coupled with the load first, and the second output end B is coupled with the load later. Illustratively, after the third output end C is coupled with the third load, in response to the second output end B being coupled with the second load, the control module controls the third switch module K50 to be off and the fourth switch module K20 to be on, so that the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load. That is, at this time, the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load, and the third voltage conversion module 30 supplies power to the third load.

[0098] Fifteenth: the third output end C is coupled with the load first, the second output end B is coupled with the load second, and the first output end A is coupled with the load third. Exemplarily, after the third output end C is coupled with the third load and the second output end B is coupled with the second load, the control module controls the second switch module K30 to be off and the first switch module K10 to be on in response to the first output end A being coupled with the first load, so as to make the first voltage conversion module 10 supply power to the first load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0099] In the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0100] In the embodiment, the parallel connection scheme of the multiple voltage conversion modules is adopted, the transistors involved in the parallel connection are controlled by controlling the output voltage of the main circuit and the bypass circuit and the output time of the bypass circuit, so as to achieve the non-inverted flow condition, to realize the function of full-load output without shutdown, and the DC-DC module is not needed in the power supply circuit of the present application, the power supply efficiency is obviously improved, the heat is reduced, and the hardware cost of the power supply circuit is effectively reduced. That is, in the embodiment, three output ends can supply power and multiple parallel connection can supply power to the same load.

[0101] Referring to FIG. 4, FIG. 4 is a structural schematic diagram of another embodiment of the power supply circuit provided by the present application. The power supply circuit 100 comprises a first voltage conversion module 10, a first transistor Q1, a second voltage conversion module 20, a second transistor Q4, a third transistor Q2, a fourth transistor Q3, a third voltage conversion module 30, a fifth transistor Q9, a sixth transistor Q7, a seventh transistor Q8, and a control module (not shown in the figure).

[0102] The first end of the first transistor Q1 is coupled with the output end of the first voltage conversion module 10, the second end of the first transistor Q1 is coupled with the first output end A of the power supply circuit 100, and the control end of the first transistor Q1 is coupled with the control module.

[0103] The first end of the second transistor Q4 is coupled with the output end of the second voltage conversion module 20, the second end of the second transistor Q4 is coupled with the second output end B of the power supply circuit 100, and the control end of the second transistor Q4 is coupled with the control module.

[0104] The first end of the third transistor Q2 is coupled with the output end of the first voltage conversion module 10, the second end of the third transistor Q2 is coupled with the first end of the fourth transistor Q3, the second end of the fourth transistor Q3 is coupled with the output end of the second voltage conversion module 20, and the control ends of the third transistor Q2 and the fourth transistor Q3 are coupled with the control module.

[0105] The first end of the fifth transistor Q9 is coupled to the output end of the third voltage conversion module 30, and the second end of the fifth transistor Q9 is coupled to the third output end C of the power supply circuit 100.

[0106] The first end of the sixth transistor Q7 is coupled to the output end of the first voltage conversion module 10, the second end of the sixth transistor Q7 is coupled to the first end of the seventh transistor Q8, and the second end of the seventh transistor Q8 is coupled to the output end of the third voltage conversion module 30.

[0107] The first body diode is provided in the fourth transistor Q3, the anode of the first body diode is coupled to the second end of the fourth transistor Q3, and the cathode of the first body diode is coupled to the first end of the fourth transistor Q3; the second body diode is provided in the seventh transistor Q8, the anode of the second body diode is coupled to the second end of the seventh transistor Q8, and the cathode of the second body diode is coupled to the first end of the seventh transistor Q8.

[0108] The power supply circuit 100 of the embodiment has the following power supply modes:

[0109] The first output end A is coupled to the load. Exemplarily, the control module responds to the first output end A coupled to the first load, controls the first transistor Q1, the third transistor Q2 and the sixth transistor Q7 to be turned on, so that the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 jointly supply power to the first load.

[0110] The first output end A is coupled to the load, and the second output end B is coupled to the load. Exemplarily, after the first output end A is coupled to the first load, the control module responds to the second output end B coupled to the second load, controls the third transistor Q2 to be turned off and the second transistor Q4 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load.

[0111] The first output end A is coupled to the load, and the second output end B is coupled to the load. Exemplarily, after the first output end A is coupled to the first load, and the second output end B is coupled to the second load, the control module responds to the third output end C coupled to the third load, controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on, so that the third voltage conversion module 30 supplies power to the third load.

[0112] Fourthly, the first output end A is coupled with the load first, and the third output end C is coupled with the load later. Exemplarily, after the first output end A is coupled with the first load, the control module controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on in response to the third output end C being coupled with the third load, so as to make the third voltage conversion module 30 supply power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the first load together.

[0113] Fifthly, the first output end A is coupled with the load first, the third output end C is coupled with the load later, and the second output end B is coupled with the load again. Exemplarily, after the first output end A is coupled with the first load and the third output end C is coupled with the third load, the control module controls the third transistor Q2 to be turned off and the second transistor Q4 to be turned on in response to the second output end B being coupled with the second load, so as to make the second voltage conversion module 20 supply power to the second load. At this time, the first transistor Q1 and the second transistor Q4 remain to be turned on, and the sixth transistor Q7 remains to be turned off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0114] Sixthly, only the second output end B is coupled with the load. Exemplarily, the control module controls the second transistor Q4, the third transistor Q2 and the sixth transistor Q7 to be turned on in response to the second output end B being coupled with the second load, so as to make the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 supply power to the second load together. At this time, the first transistor Q1 and the fifth transistor Q9 remain to be turned off.

[0115] Seventhly, the second output end B is coupled with the load first, and the first output end A is coupled with the load later. Exemplarily, after the second output end B is coupled with the second load, the control module controls the third transistor Q2 to be turned off and the first transistor Q1 to be turned on in response to the first output end A being coupled with the first load, so as to make the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the first load together. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the first load. At this time, the fifth transistor Q9 remains to be turned off, and the sixth transistor Q7 remains to be turned on.

[0116] The eighth: the second output end B is coupled with the load first, the first output end A is coupled with the load later, and the third output end C is coupled with the load again. Illustratively, after the second output end B is coupled with the second load and the first output end A is coupled with the first load, the control module responds to the third output end C coupled with the third load, controls the sixth transistor Q7 to be off and the fifth transistor Q9 to be on, so as to make the third voltage conversion module 30 supply power to the third load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0117] The ninth: the second output end B is coupled with the load first, and the third output end C is coupled with the load later. Illustratively, after the second output end B is coupled with the second load, the control module responds to the third output end C coupled with the third load, controls the sixth transistor Q7 to be off and the fifth transistor Q9 to be on, so as to make the third voltage conversion module 30 supply power to the third load. That is, at this time, the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load.

[0118] The tenth: the second output end B is coupled with the load first, the third output end C is coupled with the load later, and the first output end A is coupled with the load again. After the second output end B is coupled with the second load and the third output end C is coupled with the third load, the control module responds to the first output end A coupled with the first load, controls the third transistor Q2 to be off and the first transistor Q1 to be on, so as to make the first voltage conversion module 10 supply power to the first load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0119] The eleventh: only the third output end C is coupled with the load. Illustratively, the control module responds to the third output end C coupled with the third load, controls the first transistor Q1 and the second transistor Q4 to be off, and controls the third transistor Q2, the seventh transistor Q8 and the fifth transistor Q9 to be on, so as to make the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 supply power to the third load together.

[0120] The twelfth: the third output end C is coupled with the load first, and the first output end A is coupled with the load later. Illustratively, in some embodiments, after the third output end C is coupled with the third load, the control module responds to the first output end A coupled with the first load, controls the sixth transistor Q7 to be off and the first transistor Q1 to be on, so as to make the second voltage conversion module 20 and the first voltage conversion module 10 supply power to the first load together. That is, at this time, the second voltage conversion module 20 and the first voltage conversion module 10 supply power to the first load together, and the third voltage conversion module 30 supplies power to the third load.

[0121] The thirteenth: the third output end C is coupled with the load first, the first output end A is coupled with the load second, and the second output end B is coupled with the load third. Exemplarily, after the third output end C is coupled with the third load and the first output end A is coupled with the first load, the control module controls the third transistor Q2 to be off and the second transistor Q4 to be on in response to the second output end B being coupled with the second load, so as to make the second voltage conversion module 20 supply power to the second load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0122] The fourteenth: the third output end C is coupled with the load first, and the second output end B is coupled with the load second. Exemplarily, after the third output end C is coupled with the third load, the control module controls the sixth transistor Q7 to be off and the second transistor Q4 to be on in response to the second output end B being coupled with the second load, so as to make the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load. That is, at this time, the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load, and the third voltage conversion module 30 supplies power to the third load.

[0123] The fifteenth: the third output end C is coupled with the load first, the second output end B is coupled with the load second, and the first output end A is coupled with the load third. Exemplarily, after the third output end C is coupled with the third load and the second output end B is coupled with the second load, the control module controls the third transistor Q2 to be off and the first transistor Q1 to be on in response to the first output end A being coupled with the first load, so as to make the first voltage conversion module 10 supply power to the first load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0124] In the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0125] In the embodiment, the parallel connection scheme of the multiple voltage conversion modules is adopted, the transistors involved in parallel connection are controlled by controlling the output voltage of the main road and the bypass and the output time of the bypass, so as to achieve the non-inverted flow situation, to realize the function of full-load output without downtime of the whole machine. In the power supply circuit of the application, a DC-DC module is not needed, the power supply efficiency is obviously improved, the heat is reduced, and the hardware cost of the power supply circuit is effectively reduced. That is, in the embodiment, three output ends can supply power and multiple parallel connection can supply power to the same load.

[0126] Referring to FIG. 5, FIG. 5 is a structural schematic diagram of another embodiment of the power supply circuit provided in the present application. The power supply circuit 100 comprises a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a fourth switch module K20, a second switch module K30, a third voltage conversion module 30, a fifth switch module K40, a third switch module K50, a sixth switch module K60, and a control module (not shown in the figure).

[0127] The third voltage conversion module 30 is configured to receive alternating current and output direct current.

[0128] The first end of the fifth switch module K40 is coupled to the output end of the third voltage conversion module 30, and the second end of the fifth switch module K40 is coupled to the third output end C of the power supply circuit 100.

[0129] The first end of the third switch module K50 is coupled to the output end of the third voltage conversion module 30, and the second end of the third switch module K50 is coupled to the output end of the first voltage conversion module 10.

[0130] The first end of the sixth switch module K60 is coupled to the output end of the second voltage conversion module 20, and the second end of the sixth switch module K60 is coupled to the output end of the third voltage conversion module 30.

[0131] The power supply circuit 100 of the present embodiment has the following power supply modes:

[0132] The first mode: only the first output end A is coupled to the load. Illustratively, in response to the first output end A being coupled to the first load, the control module controls the first switch module K10, the second switch module K30, and the third switch module K50 to be turned on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the first load. At this time, the fourth switch module K20, the fifth switch module K40, and the sixth switch module K60 remain off.

[0133] The second mode: the first output end A is coupled to the load first, and the second output end B is coupled to the load later. Illustratively, after the first output end A is coupled to the first load, in response to the second output end B being coupled to the second load, the control module controls the second switch module K30 to be turned off and the fourth switch module K20 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load. At this time, the first switch module K10 and the third switch module K50 remain turned on, and the fifth switch module K40 and the sixth switch module K60 remain off.

[0134] The third kind: the first output end A is coupled with the load first, the second output end B is coupled with the load second, and the third output end C is coupled with the load third. Exemplarily, after the first output end A is coupled with the first load and the second output end B is coupled with the second load, the control module controls the third switch module K50 to be off and the fifth switch module K40 to be on in response to the third output end C being coupled with the third load, so as to make the third voltage conversion module 30 supply power to the third load. At this time, the first switch module K10 and the fourth switch module K20 remain on, and the sixth switch module K60 and the second switch module K30 remain off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0135] The fourth kind: the first output end A is coupled with the load first, and the third output end C is coupled with the load second. Exemplarily, after the first output end A is coupled with the first load, the control module controls the third switch module K50 to be off and the fifth switch module K40 to be on in response to the third output end C being coupled with the third load, so as to make the third voltage conversion module 30 supply power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the first load together. At this time, the first switch module K10 and the second switch module K30 remain on, and the fourth switch module K20 and the sixth switch module K60 remain off.

[0136] The fifth kind: the first output end A is coupled with the load first, the third output end C is coupled with the load second, and the second output end B is coupled with the load third. Exemplarily, after the first output end A is coupled with the first load and the third output end C is coupled with the third load, the control module controls the second switch module K30 to be off and the fourth switch module K20 to be on in response to the second output end B being coupled with the second load, so as to make the second voltage conversion module 20 supply power to the second load. At this time, the first switch module K10 and the fourth switch module K20 remain on, and the third switch module K50 and the sixth switch module K60 remain off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0137] The sixth kind: only the second output end B is coupled with the load. Exemplarily, the control module controls the fourth switch module K20, the second switch module K30 and the sixth switch module K60 to be on in response to the second output end B being coupled with the second load, so as to make the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 supply power to the second load together. At this time, the first switch module K10, the fifth switch module K40 and the third switch module K50 remain off.

[0138] The seventh: the second output end B is coupled with the load first, and the first output end A is coupled with the load later. Exemplarily, after the second output end B is coupled with the second load, the control module controls the second switch module K30 and the sixth switch module K60 to be off, and the first switch module K10 and the third switch module K50 to be on in response to the first output end A being coupled with the first load, so that the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the first load together. That is, at this time, the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the first load. At this time, the fifth switch module K40 remains off, and the third switch module K50 remains on.

[0139] Exemplarily, after the second output end B is coupled with the second load, the control module controls the second switch module K30 and the third switch module K50 to be off, and the first switch module K10 and the sixth switch module K60 to be on in response to the first output end A being coupled with the first load, so that the second voltage conversion module 20 and the third voltage conversion module 30 supply power to the second load together, and the first voltage conversion module 10 supplies power to the first load. At this time, the fifth switch module K40 remains off.

[0140] The eighth: the second output end B is coupled with the load first, the first output end A is coupled with the load later, and the third output end C is coupled with the load again. Exemplarily, after the second output end B is coupled with the second load, and the first output end A is coupled with the first load, the control module controls the third switch module K50, the sixth switch module K60 and the second switch module K30 to be off, and the fifth switch module K40 to be on in response to the third output end C being coupled with the third load, so that the third voltage conversion module 30 supplies power to the third load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0141] The ninth: the second output end B is coupled with the load first, and the third output end C is coupled with the load later. Exemplarily, after the second output end B is coupled with the second load, the control module controls the third switch module K50 and the sixth switch module K60 to be off, and the fifth switch module K40 to be on in response to the third output end C being coupled with the third load, so that the third voltage conversion module 30 supplies power to the third load. That is, at this time, the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load.

[0142] Exemplarily, after the second output end B is coupled with the second load, the control module responds to the third output end C coupled with the third load, controls the second switch module K30 and the sixth switch module K60 to be off, and the fifth switch module K40 and the third switch module K50 to be on, so as to make the third voltage conversion module 30 and the first voltage conversion module 10 supply power to the third load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the third load.

[0143] The tenth: the second output end B is coupled with the load first, the third output end C is coupled with the load later, and the first output end A is coupled with the load again. After the second output end B is coupled with the second load and the third output end C is coupled with the third load, the control module responds to the first output end A coupled with the first load, controls the second switch module K30, the third switch module K50 and the sixth switch module K60 to be off, and the first switch module K10, the fourth switch module K20 and the fifth switch module K40 to be on, so as to make the second voltage conversion module 20 supply power to the second load, the first voltage conversion module 10 supply power to the first load and the third voltage conversion module 30 supply power to the third load.

[0144] The eleventh: only the third output end C is coupled with the load. Exemplarily, the control module responds to the third output end C coupled with the third load, controls the first switch module K10, the fourth switch module K20 and the second switch module K30 to be off, and the third switch module K50, the fifth switch module K40 and the sixth switch module K60 to be on, so as to make the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 supply power to the third load together.

[0145] The twelfth: the third output end C is coupled with the load first, and the first output end A is coupled with the load later. Exemplarily, after the third output end C is coupled with the third load, the control module responds to the first output end A coupled with the first load, controls the third switch module K50 and the sixth switch module K60 to be off, and the first switch module K10 and the second switch module K30 to be on, so as to make the second voltage conversion module 20 and the first voltage conversion module 10 supply power to the first load together. That is, at this time, the second voltage conversion module 20 and the first voltage conversion module 10 supply power to the first load together, and the third voltage conversion module 30 supplies power to the third load.

[0146] Exemplarily, after the third output end C is coupled with the third load, the control module responds to the first output end A coupled with the first load, controls the third switch module K50, the second switch module K30 and the fourth switch module K20 to be off, and the first switch module K10 and the sixth switch module K60 to be on, so as to make the second voltage conversion module 20 and the third voltage conversion module 30 supply power to the third load together, and the first voltage conversion module 10 supply power to the first load.

[0147] Thirteenth: the third output end C is coupled with the load first, the first output end A is coupled with the load second, and the second output end B is coupled with the load third. Exemplarily, after the third output end C is coupled with the third load and the first output end A is coupled with the first load, the control module controls the second switch module K30, the third switch module K50 and the sixth switch module K60 to be off and the first switch module K10, the fourth switch module K20 and the fifth switch module K40 to be on in response to the second output end B being coupled with the second load, so as to make the second voltage conversion module 20 supply power to the second load, the first voltage conversion module 10 supply power to the first load and the third voltage conversion module 30 supply power to the third load.

[0148] Fourteenth: the third output end C is coupled with the load first, and the second output end B is coupled with the load second. Exemplarily, after the third output end C is coupled with the third load, the control module controls the third switch module K50 to be off and the fourth switch module K20 to be on in response to the second output end B being coupled with the second load, so as to make the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load. That is, at this time, the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load and the third voltage conversion module 30 supplies power to the third load.

[0149] Exemplarily, after the third output end C is coupled with the third load, the control module controls the second switch module K30 and the sixth switch module K60 to be off and the fourth switch module K20 and the third switch module K50 to be on in response to the second output end B being coupled with the second load, so as to make the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the third load and the second voltage conversion module 20 supply power to the second load.

[0150] Fifteenth: the third output end C is coupled with the load first, the second output end B is coupled with the load second, and the first output end A is coupled with the load third. Exemplarily, after the third output end C is coupled with the third load and the second output end B is coupled with the second load, the control module controls the second switch module K30 to be off and the first switch module K10 to be on in response to the first output end A being coupled with the first load, so as to make the first voltage conversion module 10 supply power to the first load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load and the third voltage conversion module 30 supplies power to the third load.

[0151] In the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0152] In the embodiment, a parallel scheme of multiple voltage conversion modules is adopted, the transistors involved in parallel connection are controlled by controlling the output voltage of the main circuit and bypass circuit and the output time of the bypass circuit, so as to achieve non-inverted flow and realize the function of full-load output without shutdown. In the power supply circuit, a DC-DC module is not needed, the power supply efficiency is obviously improved, the heat is reduced, and the hardware cost of the power supply circuit is effectively reduced. That is, in the embodiment, multiple output terminals can supply power to the same load.

[0153] Referring to FIG. 6, FIG. 6 is a structural schematic diagram of another embodiment of the power supply circuit provided by the present application. The power supply circuit 100 comprises a first voltage conversion module 10, a first transistor Q1, a second voltage conversion module 20, a second transistor Q4, a third transistor Q2, a fourth transistor Q3, a third voltage conversion module 30, a fifth transistor Q9, a sixth transistor Q7, a seventh transistor Q8, an eighth transistor Q5, a ninth transistor Q6, and a control module (not shown in the figure).

[0154] The first end of the first transistor Q1 is coupled to the output end of the first voltage conversion module 10, the second end of the first transistor Q1 is coupled to the first output end A of the power supply circuit 100, and the control end of the first transistor Q1 is coupled to the control module.

[0155] The first end of the second transistor Q4 is coupled to the output end of the second voltage conversion module 20, the second end of the second transistor Q4 is coupled to the second output end B of the power supply circuit 100, and the control end of the second transistor Q4 is coupled to the control module.

[0156] The first end of the third transistor Q2 is coupled to the output end of the first voltage conversion module 10, the second end of the third transistor Q2 is coupled to the first end of the fourth transistor Q3, the second end of the fourth transistor Q3 is coupled to the output end of the second voltage conversion module 20, and the control ends of the third transistor Q2 and the fourth transistor Q3 are coupled to the control module.

[0157] The first end of the fifth transistor Q9 is coupled to the output end of the third voltage conversion module 30, and the second end of the fifth transistor Q9 is coupled to the third output end C of the power supply circuit 100.

[0158] The first end of the sixth transistor Q7 is coupled to the output end of the first voltage conversion module 10, the second end of the sixth transistor Q7 is coupled to the first end of the seventh transistor Q8, and the second end of the seventh transistor Q8 is coupled to the output end of the third voltage conversion module 30.

[0159] The first end of the eighth transistor Q5 is coupled to the output end of the second voltage conversion module 20, the second end of the eighth transistor Q5 is coupled to the first end of the ninth transistor Q6, and the second end of the ninth transistor Q6 is coupled to the output end of the third voltage conversion module 30.

[0160] The power supply circuit 100 of the embodiment has the following four power supply modes:

[0161] The first mode: only the first output terminal A is coupled to a load. Illustratively, in response to the first output terminal A being coupled to a first load, the control module controls the first transistor Q1, the third transistor Q2, the fourth transistor Q3, the sixth transistor Q7, and the seventh transistor Q8 to be turned on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the first load. At this time, the second transistor Q4, the fifth transistor Q9, the eighth transistor Q5, and the ninth transistor Q6 remain turned off.

[0162] The second mode: the first output terminal A is coupled to a load first, and the second output terminal B is coupled to a load later. Illustratively, after the first output terminal A is coupled to a first load, in response to the second output terminal B being coupled to a second load, the control module controls the third transistor Q2 to be turned off and the second transistor Q4 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load. At this time, the first transistor Q1, the sixth transistor Q7, and the seventh transistor Q8 remain turned on, and the fifth transistor Q9, the eighth transistor Q5, and the ninth transistor Q6 remain turned off.

[0163] The third mode: the first output terminal A is coupled to a load first, the second output terminal B is coupled to a load later, and the third output terminal C is coupled to a load again. Illustratively, after the first output terminal A is coupled to a first load and the second output terminal B is coupled to a second load, in response to the third output terminal C being coupled to a third load, the control module controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. At this time, the first transistor Q1 and the second transistor Q4 remain turned on, and the eighth transistor Q5, the ninth transistor Q6, the third transistor Q2, and the fourth transistor Q3 remain turned off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0164] The fourth mode: the first output terminal A is coupled to a load first, and the third output terminal C is coupled to a load later. Illustratively, after the first output terminal A is coupled to a first load, in response to the third output terminal C being coupled to a third load, the control module controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on, so that the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load. At this time, the first transistor Q1, the third transistor Q2, and the fourth transistor Q3 remain turned on, and the second transistor Q4, the eighth transistor Q5, and the ninth transistor Q6 remain turned off.

[0165] The fifth mode: the first output end A is coupled with the load first, the third output end C is coupled with the load later, and the second output end B is coupled with the load again. Exemplarily, after the first output end A is coupled with the first load and the third output end C is coupled with the third load, the control module controls the third transistor Q2 to be off and the second transistor Q4 to be on in response to the second output end B being coupled with the second load, so as to make the second voltage conversion module 20 supply power to the second load. At this time, the first transistor Q1 and the third transistor Q2 remain on, and the sixth transistor Q7 and the eighth transistor Q5 remain off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0166] The sixth mode: only the second output end B is coupled with the load. Exemplarily, the control module controls the second transistor Q4, the third transistor Q2 and the eighth transistor Q5 to be on in response to the second output end B being coupled with the second load, so as to make the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 supply power to the second load together. At this time, the first transistor Q1, the fifth transistor Q9 and the sixth transistor Q7 remain off.

[0167] The seventh mode: the second output end B is coupled with the load first, and the first output end A is coupled with the load later. Exemplarily, after the second output end B is coupled with the second load, the control module controls the third transistor Q2 and the eighth transistor Q5 to be off and the first transistor Q1 and the sixth transistor Q7 to be on in response to the first output end A being coupled with the first load, so as to make the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the first load together. That is, at this time, the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the first load. At this time, the fifth switch module K40 remains off, and the third switch module K50 remains on.

[0168] Exemplarily, after the second output end B is coupled with the second load, the control module controls the third transistor Q2 and the sixth transistor Q7 to be off and the first transistor Q1, the eighth transistor Q5 and the ninth transistor Q6 to be on in response to the first output end A being coupled with the first load, so as to make the second voltage conversion module 20 and the third voltage conversion module 30 supply power to the second load together, and the first voltage conversion module 10 supply power to the first load. At this time, the fifth transistor Q9 remains off.

[0169] The eighth: the second output end B is coupled with the load first, the first output end A is coupled with the load later, and the third output end C is coupled with the load again. Exemplarily, after the second output end B is coupled with the second load and the first output end A is coupled with the first load, the control module controls the sixth transistor Q7, the eighth transistor Q5 and the third transistor Q2 to be turned off and the fifth transistor Q9 to be turned on in response to the third output end C being coupled with the third load, so as to make the third voltage conversion module 30 supply power to the third load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load and the third voltage conversion module 30 supplies power to the third load.

[0170] The ninth: the second output end B is coupled with the load first, and the third output end C is coupled with the load later. Exemplarily, after the second output end B is coupled with the second load, the control module controls the sixth transistor Q7 and the eighth transistor Q5 to be turned off and the fifth transistor Q9 to be turned on in response to the third output end C being coupled with the third load, so as to make the third voltage conversion module 30 supply power to the third load. That is, at this time, the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load.

[0171] Exemplarily, after the second output end B is coupled with the second load, the control module controls the third transistor Q2 and the eighth transistor Q5 to be turned off and the fifth transistor Q9 and the sixth transistor Q7 to be turned on in response to the third output end C being coupled with the third load, so as to make the third voltage conversion module 30 and the first voltage conversion module 10 supply power to the third load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the third load.

[0172] The tenth: the second output end B is coupled with the load first, the third output end C is coupled with the load later, and the first output end A is coupled with the load again. After the second output end B is coupled with the second load and the third output end C is coupled with the third load, the control module controls the third transistor Q2, the sixth transistor Q7 and the eighth transistor Q5 to be turned off and the first transistor Q1, the second transistor Q4 and the fifth transistor Q9 to be turned on in response to the first output end A being coupled with the first load, so as to make the second voltage conversion module 20 supply power to the second load, the first voltage conversion module 10 supply power to the first load and the third voltage conversion module 30 supply power to the third load.

[0173] Eleventh: only the third output end C is coupled with the load. Illustratively, in response to the third output end C being coupled with the third load, the control module controls the first transistor Q1, the second transistor Q4, the third transistor Q2 to be off, and the sixth transistor Q7, the seventh transistor Q8, the fifth transistor Q9, the eighth transistor Q5 and the ninth transistor Q6 to be on, so that the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 jointly supply power to the third load.

[0174] Twelfth: the third output end C is coupled with the load first, and the first output end A is coupled with the load later. Illustratively, after the third output end C is coupled with the third load, in response to the first output end A being coupled with the first load, the control module controls the seventh transistor Q8 and the ninth transistor Q6 to be off, and the first transistor Q1 and the third transistor Q2, the fourth transistor Q3 to be on, so that the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load. That is, at this time, the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0175] Illustratively, after the third output end C is coupled with the third load, in response to the first output end A being coupled with the first load, the control module controls the sixth transistor Q7, the third transistor Q2, the second transistor Q4 to be off, and the first transistor Q1, the eighth transistor Q5 and the ninth transistor Q6 to be on, so that the second voltage conversion module 20 and the third voltage conversion module 30 jointly supply power to the third load, and the first voltage conversion module 10 supplies power to the first load.

[0176] Thirteenth: the third output end C is coupled with the load first, the first output end A is coupled with the load later, and the second output end B is coupled with the load again. Illustratively, after the third output end C is coupled with the third load, and the first output end A is coupled with the first load, in response to the second output end B being coupled with the second load, the control module controls the third transistor Q2, the fourth transistor Q3, the sixth transistor Q7, the seventh transistor Q8, the eighth transistor Q5, the ninth transistor Q6 to be off, and the first transistor Q1, the second transistor Q4 and the fifth transistor Q9 to be on, so that the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0177] The fourteenth: the third output end C is coupled with the load first, and the second output end B is coupled with the load later. Exemplarily, after the third output end C is coupled with the third load, the control module controls the sixth transistor Q7, the seventh transistor Q8 to be turned off and the second transistor Q4 to be turned on in response to the second output end B being coupled with the second load, so that the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load. That is, at this time, the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load, and the third voltage conversion module 30 supplies power to the third load.

[0178] Exemplarily, after the third output end C is coupled with the third load, the control module controls the third transistor Q2, the fourth transistor Q3, the eighth transistor Q5 and the ninth transistor Q6 to be turned off and the second transistor Q4, the sixth transistor Q7 and the seventh transistor Q8 to be turned on in response to the second output end B being coupled with the second load, so that the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the third load, and the second voltage conversion module 20 supplies power to the second load.

[0179] The fifteenth: the third output end C is coupled with the load first, the second output end B is coupled with the load later, and the first output end A is coupled with the load again. Exemplarily, after the third output end C is coupled with the third load and the second output end B is coupled with the second load, the control module controls the third transistor Q2, the fourth transistor Q3 to be turned off and the first transistor Q1 to be turned on in response to the first output end A being coupled with the first load, so that the first voltage conversion module 10 supplies power to the first load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0180] In the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0181] In the embodiment, the parallel connection scheme of the multiple voltage conversion modules is adopted, the transistors involved in parallel connection are controlled by controlling the output voltage of the main circuit and the bypass circuit and the output time of the bypass circuit, so as to achieve the non-inverted flow condition, realize the function of full-load output without machine downtime, and the DC-DC module is not needed in the power supply circuit of the application, the power supply efficiency is obviously improved, the heat is reduced, and the hardware cost of the power supply circuit is effectively reduced. That is, in the embodiment, the multiple output ends can supply power and the multiple parallel connection can supply power to the same load.

[0182] The first transistor Q1, the second transistor Q4, the third transistor Q2, the fourth transistor Q3, the fifth transistor Q9, the sixth transistor Q7, the seventh transistor Q8, the eighth transistor Q5, and the ninth transistor Q6 mentioned in any of the above embodiments each have a corresponding body diode. The transistors mentioned above can be MOS transistors.

[0183] For example, the anode of the body diode of the first transistor Q1 is coupled to the first output terminal A, and the cathode of the body diode of the first transistor Q1 is coupled to the output terminal of the first voltage conversion module 10.

[0184] The anode of the body diode of the second transistor Q4 is coupled to the second output terminal B, and the cathode of the body diode of the second transistor Q4 is coupled to the output terminal of the second voltage conversion module 20.

[0185] The anode of the body diode of the third transistor Q2 is coupled to the output terminal of the first voltage conversion module 10, and the cathode of the body diode of the third transistor Q2 is coupled to the first terminal of the fourth transistor Q3.

[0186] The anode of the body diode of the fourth transistor Q3 is coupled to the second terminal of the fourth transistor Q3, and the cathode of the body diode of the fourth transistor Q3 is coupled to the first terminal of the fourth transistor Q3.

[0187] The anode of the body diode of the fifth transistor Q9 is coupled to the third output terminal C, and the cathode of the body diode of the fifth transistor Q9 is coupled to the output terminal of the third voltage conversion module 30.

[0188] The anode of the body diode of the sixth transistor Q7 is coupled to the output terminal of the first voltage conversion module 10, and the cathode of the body diode of the sixth transistor Q7 is coupled to the first terminal of the seventh transistor Q8.

[0189] The anode of the body diode of the seventh transistor Q8 is coupled to the output terminal of the third voltage conversion module 30, and the cathode of the body diode of the seventh transistor Q8 is coupled to the first terminal of the seventh transistor Q8.

[0190] The anode of the body diode of the eighth transistor Q5 is coupled to the output terminal of the second voltage conversion module 20, and the cathode of the body diode of the eighth transistor Q5 is coupled to the first terminal of the ninth transistor Q6.

[0191] The anode of the body diode of the ninth transistor Q6 is coupled to the output terminal of the third voltage conversion module 30, and the cathode of the body diode of the ninth transistor Q6 is coupled to the first terminal of the ninth transistor Q6.

[0192] In an application scenario, the output loop corresponding to the first output terminal A is defined as L1, the output loop corresponding to the second output terminal B is defined as L2, and the output loop corresponding to the third output terminal C is defined as L3.

[0193] 1. After the power supply circuit 100 is powered on, the control circuit normally detects whether there is a load (device) inserted into the output terminal, at which time all MOS (transistors) remain off (cut off) state.

[0194] 2. When the device is inserted into the L1 path, and there is no insertion into the other output terminals, the protocol chip A1 of the L1 path performs handshake with the device protocol, and if the power does not exceed the power of the first voltage conversion module 10, it is directly output from the first voltage conversion module 10; if the required power is greater than or equal to the maximum power of the whole machine, the voltages of the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 corresponding to the L1 path, the L2 path and the L3 path will all be raised to the voltage required by the device.

[0195] 3. The protocol chip A1 of the L1 path feeds back the corresponding information to the control circuit. The control circuit controls the first transistor Q1 to open first, and then controls the third transistor Q2 and the sixth transistor Q7 to open at the same time, and the second voltage conversion module 20 and the third voltage conversion module 30 two-way protocol adjust the voltage to be 0.1-0.4V lower than the set voltage, such as the specific voltage difference can also be 0.2V. (This point is the key, which relates to whether the voltages of the second voltage conversion module 20 and the third voltage conversion module 30 two-way will be higher than the voltage of the first voltage conversion module 10, and then the first voltage conversion module 10 or two-way will pass through the fourth transistor Q3 / seventh transistor Q8 body diode, and then through the opened Q2 / Q7 to the first voltage conversion module 10, so that the voltage conversion (first voltage conversion module 10) of this way does not work, when loaded, it cannot give full load, and the power will be pulled to death);

[0196] 4. The protocol chip A1 sends a preparation completion signal to the device, at which time the first voltage conversion module 10 starts to load, and since the transformer of the first voltage conversion module 10 can only output part of the power, the voltage of the first voltage conversion module 10 will be pulled down, and when the voltage of the first voltage conversion module 10 is pulled down to be lower than the second voltage conversion module 20 and the third voltage conversion module 30, the second voltage conversion module 20 and the third voltage conversion module 30 will pass through the fourth transistor Q3, the seventh transistor Q8 body diode, and then through the opened third transistor Q2, the sixth transistor Q7 to the first voltage conversion module 10, at which time it can be full load output, but the fourth transistor Q3 and the seventh transistor Q8 have not been opened.

[0197] 5. When the second voltage conversion module 20 and the third voltage conversion module 30 are detected to have output current in the case that the second transistor Q4 and the fifth transistor Q9 are not opened, the fourth transistor Q3 and the seventh transistor Q8 are opened, and at this time, three voltage conversions supply one output, but due to the problem of different voltage levels of different paths, the current of three outputs is unbalanced.

[0198] 6. The protocol chips of the L1 path, the L2 path and the L3 path continuously detect the output current, if the current of one path is too large and the currents of the other two paths are not different, the voltage of the path with the largest current is adjusted and reduced until the currents of the three paths are balanced; if the current of one path is large, the current of one path is small, and the current of one path is in the middle, the output voltage of the path with the largest current is adjusted and reduced, and the output voltage of the path with the smallest current is adjusted and increased until the currents of the three paths are balanced.

[0199] 7. At this time, the single-port full-load power output is completed.

[0200] Further, at this time, if one path has an inserted device, such as the L2 path, the protocol chip B1 of the L2 path will immediately communicate with the protocol of the protocol chip A1 of the L1 path, indicating that the L2 path has an inserted device.

[0201] 8. The protocol chip A1 of the L1 path immediately re-packs the current device, and the power claim is reduced to the maximum power of the sum of the L1 path and the L3 path, and then the device is recharged.

[0202] 9. At the same time, the third transistor Q2 and the fourth transistor Q3 bridged by the L1 path and the L2 path are turned off, and the voltage of the L2 path is reduced to 5V.

[0203] 10. The protocol chip B1 of the L2 path starts to perform protocol handshake with the inserted device, and the protocol chip B1 only claims the maximum power that the L2 path can output to the outside, and after the handshake is successful, the voltage of the L2 path is increased to the required voltage of the device, and the second transistor Q4 is opened to output the maximum power of the L2 path to the device.

[0204] 11. At this time, the switching from single port to double port is completed.

[0205] 12. In the case that the L1 path and the L2 path have inserted devices at the same time, the L3 path is inserted at this time, and the protocol chip C1 of the L3 path will immediately communicate with the protocol chip A1 to tell the protocol chip A1 that the L3 path has a device inserted and needs to output.

[0206] 13. The protocol chip A1 immediately re-packs the current device, and the power claim is reduced to the maximum power that the A path can output, and then the device is recharged.

[0207] 14. The sixth transistor Q7 and the seventh transistor Q8 are turned off at the same time, and the L3 voltage drops to 5V.

[0208] 15. The protocol chip C1 of the L3 path starts a protocol handshake with the inserted device, and the protocol chip C1 claims that the maximum power that the C path can output. After the handshake is successful, the L3 voltage rises to the required voltage of the device, and the fifth transistor Q9 is turned on to output the maximum power of the L3 path to the device.

[0209] 16. At this time, the switching from the two-port to the three-port is completed.

[0210] In the above manner, the output voltages of the main path and the bypass path and the output time of the bypass path are controlled to control the transistors involved in the parallel connection, so that the situation of no backflow is achieved, and the parallel connection scheme of full-load output without downtime is realized.

[0211] Referring to FIG. 7, FIG. 7 is a structural schematic diagram of another embodiment of the power supply circuit provided in the application. The power supply circuit 100 comprises a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a second switch module K30, and a control module (not shown in the figure).

[0212] The first end of the first switch module K10 is coupled to the output end of the first voltage conversion module 10, and the second end of the first switch module K10 is coupled to the first output end A of the power supply circuit 100.

[0213] The first end of the second switch module K30 is coupled to the output end of the first voltage conversion module 10, and the second end of the second switch module K30 is coupled to the output end of the second voltage conversion module 20 and the second output end B of the power supply circuit 100.

[0214] The control module is coupled to the first voltage conversion module 10, the first switch module K10, the second voltage conversion module 20, and the second switch module K30, respectively.

[0215] The control module controls the first switch module K10 and the second switch module K30 to be turned on so as to make the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the first load in common, in response to the first output end A being coupled to the first load.

[0216] In this embodiment, a parallel connection scheme of multiple voltage conversion modules is adopted to realize multiple parallel connections, so as to realize the single-path full-load function by using multiple voltage conversion modules, which can effectively reduce the design requirements for devices and save the hardware cost of the power supply circuit and the power supply device.

[0217] Referring to FIG. 8, FIG. 8 is a structural schematic diagram of another embodiment of the power supply circuit provided by the present application. The power supply circuit 100 comprises a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a second switch module K30, a third voltage conversion module 30, a third switch module K50, and a control module (not shown in the figure).

[0218] The first end of the third switch module K50 is coupled to the output end of the third voltage conversion module 30, and the second end of the third switch module K50 is coupled to the output end of the first voltage conversion module 10 and the third output end C of the power supply circuit 100.

[0219] The control module controls the first switch module K10, the second switch module K30, and the third switch module K50 to be turned on in response to the first output end A being coupled to the first load, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the first load.

[0220] After the first output end A is coupled to the first load, the control module controls the second switch module K20 to be turned off in response to the second output end B of the power supply circuit 100 being coupled to the second load, so that the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load.

[0221] After the first output end A is coupled to the first load and the second output end B is coupled to the second load, the control module controls the third switch module K50 to be turned off in response to the third output end C of the power supply circuit 100 being coupled to the third load, so that the third voltage conversion module 30 supplies power to the third load.

[0222] In the power supply circuit 100 of any of the above embodiments, when only the first output end A is coupled to the first load, the control module controls the output voltage of the second voltage conversion module 20 to be less than the output voltage of the first voltage conversion module 10, and / or the control module controls the output voltage of the third voltage conversion module 30 to be less than the output voltage of the first voltage conversion module 10.

[0223] In the power supply circuit 100 of any of the above embodiments, when only the first output end A is coupled to the first load, the output voltage of the second voltage conversion module 20 is at least 0.1-0.4V less than the output voltage of the first voltage conversion module 10, and / or the output voltage of the third voltage conversion module 30 is at least 0.1-0.4V less than the output voltage of the first voltage conversion module 10. The specific voltage difference can also be 0.2V.

[0224] In the power supply circuit 100 of any of the above embodiments, the control module monitors the output currents of the first voltage conversion module 10 and the second voltage conversion module 20, and adjusts the output voltages of the first voltage conversion module 10 and the second voltage conversion module 20 according to the output currents.

[0225] In the power supply circuit 100 of any of the above embodiments, the control module monitors the first output current of the first voltage conversion module 10, the second output current of the second voltage conversion module 20, and the third output current of the third voltage conversion module 30. The control module lowers the output voltage corresponding to one of the first output current, the second output current, and the third output current in response to one of the first output current, the second output current, and the third output current being greater than a first threshold value, and the difference between the other two of the first output current, the second output current, and the third output current being less than a second threshold value, and the other two of the first output current, the second output current, and the third output current being less than one of the first output current, the second output current, and the third output current.

[0226] In response to one of the first output current, the second output current, and the third output current being greater than the second output current, and the second output current being greater than the third output current, the control module lowers the output voltage corresponding to the first output current, and raises the output voltage corresponding to the third output current. For example, in response to the first output current being greater than the second output current, and the second output current being greater than the third output current, the control module lowers the output voltage of the first voltage conversion module corresponding to the first output current, and raises the output voltage of the third voltage conversion module corresponding to the third output current. For example, in response to the second output current being greater than the first output current, and the first output current being greater than the third output current, the control module lowers the output voltage of the second voltage conversion module corresponding to the second output current, and raises the output voltage of the third voltage conversion module corresponding to the third output current.

[0227] Referring to FIG. 9, FIG. 9 is a structural schematic diagram of an embodiment of a power supply device provided by the present application. The power supply device 200 includes a power supply circuit 100. The power supply circuit 100 is as described in any of the above embodiments. In some embodiments, the power supply device 200 can be a multi-output device. That is, the power supply device 200 can support multi-path power supply. Further, the power supply device 200 can be a charger or a power bank that can charge at least two electronic devices at the same time.

[0228] In summary, the power supply circuit and the power supply device provided by the present application use a multi-path voltage conversion module parallel connection scheme. The output voltages of the main path and the bypass path and the output time of the bypass path are controlled to control the switching modules involved in parallel connection, so that no backflow occurs, the function of full-load non-stop of the whole machine is achieved, and no DC-DC module is needed in the power supply circuit of the present application, the power supply efficiency is obviously improved, the heat is reduced, and the hardware cost of the power supply circuit is effectively reduced.

[0229] Further, three paths or even more paths can be realized for parallel connection power supply.

[0230] Further, the transformers of the parallel connection can not be the same power, and the protocol software can be adjusted to balance the load according to the transformer size.

[0231] Further, when the single port is full load output, parallel connection is performed, heat is evenly distributed, and the temperature of a certain point will not be suddenly high, which is more beneficial to the balance of the shell temperature.

[0232] Further, the maximum power of multi-port blind insertion output can be realized. That is, in the multiple voltage conversion modules, the power supply circuit 100 can still realize the transfer of single-port blind insertion power to other ports without the conversion module of DC-DC.

[0233] The above only describes some embodiments of the present application, and does not limit the protection scope of the present application, and any equivalent device or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power supply circuit, characterized by comprising: The power supply circuit comprises: a first voltage conversion module; a first switch module, a first end of the first switch module being coupled to an output end of the first voltage conversion module, and a second end of the first switch module being coupled to a first output end of the power supply circuit; a second voltage conversion module; a second switch module, a first end of the second switch module being coupled to the output end of the first voltage conversion module, and a second end of the second switch module being coupled to an output end of the second voltage conversion module; a control module, the control module being coupled to the first voltage conversion module, the first switch module, the second voltage conversion module and the second switch module respectively; wherein, in response to the first output end being coupled to a first load, the control module controls the first switch module and the second switch module to be turned on, so that the first voltage conversion module and the second voltage conversion module jointly supply power to the first load.

2. The power supply circuit according to claim 1, characterized in that, The power supply circuit further comprises: a third voltage conversion module; a third switch module, a first end of the third switch module being coupled to an output end of the third voltage conversion module, and a second end of the third switch module being coupled to the output end of the first voltage conversion module; wherein, in response to the first output end being coupled to the first load, the control module controls the first switch module, the second switch module and the third switch module to be turned on, so that the first voltage conversion module, the second voltage conversion module and the third voltage conversion module jointly supply power to the first load.

3. The power supply circuit of claim 2, wherein, After the first output end is coupled to the first load, in response to a second output end of the power supply circuit being coupled to a second load, the control module controls the second switch module to be turned off, so that the second voltage conversion module supplies power to the second load, and the first voltage conversion module and the third voltage conversion module jointly supply power to the first load.

4. The power supply circuit of claim 3, wherein, After the first output end is coupled to the first load, and the second output end is coupled to the second load, in response to a third output end of the power supply circuit being coupled to a third load, the control module controls the third switch module to be turned off, so that the third voltage conversion module supplies power to the third load.

5. The power supply circuit of claim 2, wherein, The power supply circuit further comprises: a fourth switch module, a first end of the fourth switch module being coupled to the output end of the second voltage conversion module, and a second end of the fourth switch module being coupled to the second output end of the power supply circuit; a fifth switch module, a first end of the fifth switch module being coupled to the output end of the third voltage conversion module, and a second end of the fifth switch module being coupled to a third output end of the power supply circuit; The first switch module comprises a first transistor, a first end of the first transistor being coupled to the output end of the first voltage conversion module, a second end of the first transistor being coupled to the first output end of the power supply circuit, and a control end of the first transistor being coupled to the control module; ​ The fourth switch module comprises a second transistor, a first end of the second transistor is coupled to an output end of the second voltage conversion module, a second end of the second transistor is coupled to a second output end of the power supply circuit, and a control end of the second transistor is coupled to the control module; The second switch module comprises a third transistor and a fourth transistor, a first end of the third transistor is coupled to an output end of the first voltage conversion module, a second end of the third transistor is coupled to a first end of the fourth transistor, a second end of the fourth transistor is coupled to an output end of the second voltage conversion module, and control ends of the third transistor and the fourth transistor are coupled to the control module; The fifth switch module comprises a fifth transistor, a first end of the fifth transistor is coupled to an output end of the third voltage conversion module, and a second end of the fifth transistor is coupled to a third output end of the power supply circuit; The fourth switch module comprises a sixth transistor and a seventh transistor, a first end of the sixth transistor is coupled to an output end of the first voltage conversion module, a second end of the sixth transistor is coupled to a first end of the seventh transistor, and a second end of the seventh transistor is coupled to an output end of the third voltage conversion module.

6. The power supply circuit of claim 5, wherein, A first body diode is arranged in the fourth transistor, an anode of the first body diode is coupled to the second end of the fourth transistor, and a cathode of the first body diode is coupled to the first end of the fourth transistor; A second body diode is arranged in the seventh transistor, an anode of the second body diode is coupled to the second end of the seventh transistor, and a cathode of the second body diode is coupled to the first end of the seventh transistor; The control module controls the first transistor, the third transistor and the sixth transistor to be turned on, so that the first voltage conversion module, the second voltage conversion module and the third voltage conversion module jointly supply power to the first load, in response to the first output end being coupled to a first load.

7. The power supply circuit of claim 6, wherein, The control module controls the third transistor to be turned off and the second transistor to be turned on, so that the second voltage conversion module supplies power to the second load and the first voltage conversion module and the third voltage conversion module jointly supply power to the first load, in response to the second output end being coupled to a second load after the first output end is coupled to the first load.

8. The power supply circuit of claim 7, wherein, The control module controls the sixth transistor to be turned off and the fifth transistor to be turned on, so that the third voltage conversion module supplies power to the third load, in response to the third output end being coupled to a third load after the first output end is coupled to the first load and the second output end is coupled to the second load.

9. The power supply circuit of claim 6, wherein, The control module controls the sixth transistor to be turned off and the fifth transistor to be turned on, so that the third voltage conversion module supplies power to the third load and the first voltage conversion module and the second voltage conversion module jointly supply power to the first load, in response to the third output end being coupled to a third load after the first output end is coupled to the first load.

10. The power supply circuit of any one of claims 1-9, wherein, when only the first output terminal is coupled to a first load, the control module controls the output voltage of the second voltage conversion module to be less than the output voltage of the first voltage conversion module.

11. The power supply circuit according to any one of claims 2 to 9, characterized by the control module controls the output voltage of the third voltage conversion module to be less than the output voltage of the first voltage conversion module.

12. The power supply circuit of claim 10, wherein, when only the first output terminal is coupled to a first load, the output voltage of the second voltage conversion module is 0.1-0.4V less than the output voltage of the first voltage conversion module, and / or the output voltage of the third voltage conversion module is 0.1-0.4V less than the output voltage of the first voltage conversion module.

13. The power supply circuit according to any one of claims 1 to 9, characterized by the control module monitors the output currents of the first voltage conversion module and the second voltage conversion module, and adjusts the output voltages of the first voltage conversion module and the second voltage conversion module based on the output currents.

14. The power supply circuit according to any one of claims 1 to 9, characterized by the control module monitors the first output current of the first voltage conversion module, the second output current of the second voltage conversion module, and the third output current of the third voltage conversion module, and in response to one of the first output current, the second output current, and the third output current being greater than a first threshold value, and the difference between the other two of the first output current, the second output current, and the third output current being less than a second threshold value, and less than the one, the control module decreases the output voltage corresponding to the one; in response to one of the first output current, the second output current, and the third output current being greater than the other two of the first output current, the second output current, and the third output current, the control module decreases the output voltage corresponding to the one, and increases the output voltage corresponding to the other two.

15. A power supply device, comprising: the power supply device comprises the power supply circuit of any one of claims 1-13.

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