Power supply module, power supply circuit, and electronic device

Abstract

The utility model provides a power supply module, a power supply circuit and electronic equipment, and the power supply module comprises a first capacitor which is electrically connected between a first input end and a second input end; the first switch tube is electrically connected between a first input end and a first node, and is configured to electrically connect the first input end with the first node when the first switch tube is switched on; the second switch tube is electrically connected between the first node and the first output end, and is configured to electrically connect the first node with the first output end when the first switch tube is switched on; the first inductor is electrically connected between the first node and the second output end; the second capacitor is electrically connected between the first output end and the second output end, the second input end is electrically connected to the first grounding end, and the second input end is not communicated with the first output end. According to the power supply module provided by the embodiment of the invention, two power supply topologies can be realized by using one circuit structure under the condition that an isolation module is not needed.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of power supply, in particular to a power supply module, a power supply circuit and an electronic device. BACKGROUND

[0002] Positive and negative voltage direct current-direct current (DC-DC) power supply modules are widely used in various detection devices due to their high integration and flexible use. Generally, positive voltage modules use Buck topology structure, and negative voltage modules use Buck-Boost topology structure. However, the power supply modules of the two structures serve their respective functions in the device and cannot be universal. Since the product being tested needs to be applied with not only positive voltage power supply but also negative voltage power supply when testing the product, this results in the existence of both positive voltage modules and negative voltage modules in the same device. However, the structures that can simultaneously cover the use scenarios of the two topology architectures are all isolation type circuits at present, but the isolation type circuits need to have the existence of transformers due to their own structural characteristics, and have the problems of large volume and high cost.

[0003] Therefore, there is a need for a power supply product that realizes the functions of two topologies with smaller volume and lower cost. SUMMARY

[0004] To solve at least one of the above problems, the present disclosure provides a power supply module, comprising:

[0005] a first capacitor electrically connected between the first input end and the second input end;

[0006] a first switch tube electrically connected between the first input end and the first node, and configured to electrically connect the first input end and the first node when the first switch tube is turned on;

[0007] a second switch tube electrically connected between the first node and the first output end, and configured to electrically connect the first node and the first output end when the second switch tube is turned on;

[0008] a first inductor electrically connected between the first node and the second output end; and

[0009] a second capacitor electrically connected between the first output end and the second output end,

[0010] wherein the second input end is electrically connected to the first ground end, and the second input end is not connected with the first output end.

[0011] Optionally, a first pole of the first switch tube is electrically connected to the first input end, a second pole is electrically connected to the first node, and a control pole is electrically connected to the first control end, and is configured to be turned on based on a first control signal inputted by the first control end;

[0012] The first electrode of the second switch tube is electrically connected to the first node, the second electrode is electrically connected to the first output end, and the control electrode is electrically connected to the second control end and configured to be turned on based on a second control signal input from the second control end.

[0013] Optionally, the first switch tube and the second switch tube are N-type transistors, or the first switch tube and the second switch tube are P-type transistors.

[0014] Optionally, the first capacitor and the second capacitor are electrolytic capacitors, the positive electrode of the first capacitor is electrically connected to the first input end, the negative electrode is electrically connected to the second input end, the positive electrode of the second capacitor is electrically connected to the second output end, and the positive electrode is electrically connected to the first output end.

[0015] The second aspect of the present disclosure provides a power supply module, comprising:

[0016] The first capacitor is electrically connected between the first input end and the second input end.

[0017] The first switch tube is electrically connected between the first input end and the first node and configured to electrically connect the first input end and the first node when the first switch tube is turned on.

[0018] The diode is electrically connected between the first node and the first output end.

[0019] The first inductor is electrically connected between the first node and the second output end.

[0020] The second capacitor is electrically connected between the first output end and the second output end.

[0021] The second input end is electrically connected to the first ground end, and the second input end is not in communication with the first output end.

[0022] Optionally, the first electrode of the first switch tube is electrically connected to the first input end, the second electrode is electrically connected to the first node, and the control electrode is electrically connected to the first control end and configured to be turned on based on a first control signal input from the first control end.

[0023] The cathode of the diode is electrically connected to the first node, and the anode is electrically connected to the first output end.

[0024] The third aspect of the present disclosure provides a power supply circuit, comprising:

[0025] The first circuit board is provided with at least one connector.

[0026] The power supply module described above,

[0027] The connector comprises a first pin corresponding to the first output end and a second pin corresponding to the second output end, the first pin is electrically connected to the first power output end of the power supply circuit, the second pin is electrically connected to the second power output end of the power supply circuit, and

[0028] The power supply module is electrically connected to one of the at least one connector, when the power supply circuit is in use, the first output end is electrically connected to the second ground end or the second output end is electrically connected to the second ground end, and the second ground end and the first ground end are connected to the same ground signal.

[0029] Optionally, the power supply circuit further comprises a selection switch electrically connected to the first power output end, the second power output end and the second ground end, and configured to electrically connect one of the first output end and the second output end to the second ground end based on a received control signal.

[0030] Optionally, the at least one connector comprises a first connector, and the power supply circuit further comprises a first wire,

[0031] A first end of the first wire is electrically connected to the first pin of the first connector, and a second end of the first wire is electrically connected to the second ground end, or a first end of the first wire is electrically connected to the second pin of the first connector, and a second end of the first wire is electrically connected to the second ground end.

[0032] The fourth aspect of the present disclosure provides an electronic device comprising the power supply circuit described above.

[0033] The beneficial effects of the present disclosure are as follows:

[0034] The present disclosure aims at the existing problems, and provides a power supply module, a power supply circuit and an electronic device, by providing the second input end electrically connected to the first capacitor and electrically connected to the first ground end, the first output end and the second output end electrically connected to the two poles of the second capacitor can select one of them to receive the same ground signal as the first ground end, so that the power supply module with one circuit architecture can meet the application scenarios of Buck and Buck-boost two topologies without isolator, simplify the circuit structure, reduce the circuit volume and cost, and has wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 A circuit schematic diagram of a power supply module according to an embodiment of the present disclosure is shown;

[0037] Figure 2 a circuit schematic diagram of a power supply circuit according to another embodiment of the present disclosure;

[0038] Figure 3 a circuit schematic diagram of a power supply circuit according to another embodiment of the present disclosure;

[0039] Figure 4 a circuit schematic diagram of a power supply circuit according to another embodiment of the present disclosure; Figure 3 a circuit schematic diagram of a power supply circuit according to another embodiment of the present disclosure;

[0040] Figure 5 a circuit schematic diagram of a power supply circuit according to another embodiment of the present disclosure; Figure 3 a circuit schematic diagram of a power supply circuit according to another embodiment of the present disclosure.

[0041] Figure 6 a circuit schematic diagram of a power supply circuit according to another embodiment of the present disclosure; and

[0042] Figure 7 a circuit schematic diagram of a power supply circuit according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] In order to more clearly illustrate the present disclosure, the present disclosure will be further described with reference to the preferred embodiments and accompanying drawings, wherein like reference numbers represent like parts throughout the several views. It is to be understood that the following detailed description is only illustrative and should not be considered limiting the scope of the present disclosure, as the scope of the disclosure is only limited by the appended claims.

[0044] It should be noted that the technical terms or scientific terms used in the present disclosure should be understood as the common meanings understood by those skilled in the art to which the present disclosure pertains, unless otherwise defined. The terms "first", "second", and the like used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one", "a", or "the" and the like do not denote a quantity restriction, but mean that at least one exists. The terms "include", "comprise", and the like mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and the like do not mean physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0045] In the present disclosure, "electrically connected" includes a case where constituent elements are connected together through an element having some electrical action. The element having some electrical action is not particularly limited as long as it can perform the transmission and reception of an electrical signal between the connected constituent elements. Examples of the element having some electrical action include not only electrodes and wiring but also switching elements such as transistors, resistors, inductors, capacitors, other elements having various functions, and the like.

[0046] As used in the present disclosure, "parallel", "perpendicular", and "equal" include the stated case and a case similar to the stated case within an acceptable deviation range, which is determined by a person of ordinary skill in the art taking into account the measurement being discussed and the error related to the measurement of a specific quantity (i.e., the limitation of the measurement system). For example, "equal" includes absolute equality and approximate equality, where the acceptable deviation range of approximate equality may, for example, be a difference between the two that is less than or equal to 5% of either.

[0047] To solve at least one of the above problems, with reference to Figure 1 As shown in the figure, the embodiment of the present disclosure provides a power module 1, comprising: a first capacitor C1, a first switch tube Q1, a second switch tube Q2, a first inductor L, and a second capacitor C2.

[0048] The first capacitor C1 is electrically connected between a first input terminal +IN and a second input terminal -IN. Specifically, the first input terminal +IN is a positive input terminal, and the second input terminal -IN is a negative input terminal. The second input terminal -IN is electrically connected to a first ground terminal GND. In use, the input signal voltage drop between the first input terminal +IN and the second input terminal -IN is positive. Therefore, the first capacitor C1 can be an electrolytic capacitor, with a first pole being a positive pole and a second pole being a negative pole.

[0049] The first switch tube Q1 is electrically connected between the first input terminal +IN and a first node N1, and is configured to electrically connect the first input terminal +IN and the first node N1 when the first switch tube Q1 is turned on. Specifically, a first pole of the first switch tube Q1 is electrically connected to the first input terminal +IN, a second pole is electrically connected to the first node N1, and a control pole is electrically connected to a first control terminal G1, and is configured to be turned on based on a first control signal input to the first control terminal G1.

[0050] The second switch tube Q2 is electrically connected between the first node N1 and the first output terminal Out1, and is configured to electrically connect the first node N1 and the first output terminal Out1 when the second switch tube Q2 is turned on. Specifically, the first electrode of the second switch tube Q2 is electrically connected to the first node N1, the second electrode is electrically connected to the first output terminal Out1, and the control electrode is electrically connected to the second control terminal G2 and is configured to be turned on based on the second control signal input to the second control terminal G2.

[0051] The first switch tube Q1 and the second switch tube Q2 can be MOS tubes or triodes. In the present example, the first switch tube Q1 and the second switch tube Q2 are both N-type transistors, i.e., the first electrodes of the first switch tube Q1 and the second switch tube Q2 are both drain electrodes, the second electrodes are both source electrodes, and the control electrodes are both gate electrodes. When the power supply module 1 is in use, the first switch tube Q1 is turned on when the first control terminal G1 receives a high-level signal, and the second switch tube Q2 is turned on when the second control terminal G2 receives a high-level signal.

[0052] It should be noted that the present disclosure is not limited thereto, and the first switch tube Q1 and the second switch tube Q2 can also be both P-type transistors, in which case the first electrodes of the first switch tube Q1 and the second switch tube Q2 are both source electrodes, the second electrodes are both drain electrodes, and the control electrodes are both gate electrodes. The turn-on condition of the first switch tube Q1 and the second switch tube Q2 is changed to receiving a low-level signal at the control electrode. In addition, the first switch tube Q1 and the second switch tube Q2 can be one N-type transistor and the other P-type transistor, which will not be described herein.

[0053] The second capacitor C2 is electrically connected between the first output terminal Out1 and the second output terminal Out2. The second capacitor C2 can be an electrolytic capacitor. In the embodiment of the present disclosure, in use, the first output terminal Out1 is electrically connected to a power supply circuit as a negative output terminal, and the second output terminal Out2 is electrically connected to the power supply circuit as a positive output terminal. Therefore, the positive electrode of the second capacitor C2 is electrically connected to the second output terminal Out2, and the negative electrode is electrically connected to the first output terminal Out1.

[0054] In particular, in the embodiment of the present disclosure, the second input terminal -IN is not connected to the first output terminal Out1.

[0055] Through the above arrangement, the power supply module 1 formed thereby is not a fixed topology power supply structure when not in use, so that the module formed by the power supply module 1 can realize the application scenarios of Buck and Buck-Boost power architectures without the need to set up a transformer isolation, and has the advantages of simple structure, smaller size, and lower cost. The specific use process will be described in detail when other aspects of the present disclosure are described below.

[0056] In another alternative embodiment, with reference to Figure 2As shown, the power module 1' provided by the embodiment of the present disclosure includes a first capacitor C1, a first switch tube Q1, a diode D, a first inductor L, and a second capacitor C2.

[0057] The first capacitor C1 is electrically connected between the first input terminal +IN and the second input terminal -IN. Specifically, the first input terminal +IN is a positive input terminal, and the second input terminal -IN is a negative input terminal. The second input terminal -IN is electrically connected to the first ground terminal GND. In use, the input signal voltage drop between the first input terminal +IN and the second input terminal -IN is positive. Therefore, the first capacitor C1 can be an electrolytic capacitor, the first pole of which is positive, and the second pole of which is negative.

[0058] The first switch tube Q1 is electrically connected between the first input terminal +IN and the first node N1, and is configured to electrically connect the first input terminal +IN and the first node N1 when the first switch tube Q1 is turned on. Specifically, the first pole of the first switch tube Q1 is electrically connected to the first input terminal +IN, the second pole of the first switch tube Q1 is electrically connected to the first node N1, and the control pole of the first switch tube Q1 is electrically connected to the first control terminal G1 and is configured to be turned on based on the first control signal input to the first control terminal G1.

[0059] The first switch tube Q1 can be a MOS tube or a triode. In this example, the first switch tube Q1 is an N-type transistor, i.e., the first pole of the first switch tube Q1 is the drain, the second pole of the first switch tube Q1 is the source, and the control pole of the first switch tube Q1 is the gate. When the first control terminal G1 receives a high-level signal in use of the power module 1', the first switch tube Q1 is turned on. Of course, the present disclosure is not limited thereto, and the first switch tube Q1 can also be a P-type transistor, which will not be described herein.

[0060] The diode D is electrically connected between the first node N1 and the first output terminal Out1. Specifically, the cathode of the diode D is electrically connected to the first node N1, and the anode of the diode D is electrically connected to the first output terminal Out1. The diode D is configured to be turned on when the voltage of the first node N1 is lower than the voltage of the first output terminal Out1 and meets the turn-on amplitude, and acts as a freewheeling diode.

[0061] The second capacitor C2 is electrically connected between the first output terminal Out1 and the second output terminal Out2. The second capacitor C2 can be an electrolytic capacitor. In the embodiment of the present disclosure, the first output terminal Out1 is electrically connected to the negative output terminal of a power supply circuit, and the second output terminal Out2 is electrically connected to the positive output terminal of the power supply circuit. Therefore, the positive pole of the second capacitor C2 is electrically connected to the second output terminal Out2, and the negative pole of the second capacitor C2 is electrically connected to the first output terminal Out1.

[0062] In particular, in the embodiment of the present disclosure, the second input terminal -IN is not connected to the first output terminal Out1.

[0063] Through the above setting, the power module 1' formed is not a fixed topology power structure when not in use, so that the module formed by the power module 1' can realize the application scenarios of Buck and Buck-Boost two power architectures without setting transformer isolation, and the structure is simple, the volume is smaller, and the cost is lower.

[0064] It should be noted that, compared with the position of the diode D replaced by the second switch tube Q2, the high conduction loss problem caused by the large forward voltage drop of the diode D can be avoided, so that the conduction loss can be reduced and the efficiency can be improved, and therefore the switching sub-circuit of the two switch tube structure is more preferred.

[0065] The present disclosure also provides a power supply circuit, comprising: a first circuit board provided with at least one connector; and the power supply module described above,

[0066] The connector comprises a first pin corresponding to the first output end and a second pin corresponding to the second output end, the first pin is electrically connected to the first power output end of the power supply circuit, the second pin is electrically connected to the second power output end of the power supply circuit, and

[0067] The power supply module is electrically connected to one of the at least one connector, when the power supply circuit is in use, the first output end is electrically connected to the second ground end or the second output end is electrically connected to the second ground end, and the second ground end and the first ground end are connected to the same ground signal.

[0068] It should be noted that in the embodiments of the present disclosure, the connector can be a connection socket that can be used for plugging, or a pad or conductive column that can form an electrical connection relationship, as long as it can form an electrical connection between the power supply module and the corresponding port. Of course, the first pin and the second pin can also be pads or connection ports, which are not limited herein.

[0069] In the present embodiment, by cooperating the power supply module with the first circuit board, the application scenarios of Buck and Buck-Boost two power architectures can be realized without transformer isolation, the structure is simple, and the volume and cost are reduced.

[0070] Specifically, Figure 3 A power supply circuit structure of a specific example is shown. In this example, the power supply circuit comprises a power supply module 1, and those skilled in the art should understand that when the position of the power supply module 1 is replaced by the power supply module 1', it also belongs to the scope of the present disclosure. For ease of illustration, the power supply module 1 is taken as an example for description below.

[0071] In the embodiment of the present disclosure, the connector 2 comprises a first pin corresponding to the first output end Out1 and a second pin corresponding to the second output end Out2, the first pin is electrically connected to the first power output end -OUT of the power supply circuit, and the second pin is electrically connected to the second power output end +OUT of the power supply circuit.

[0072] In particular, the power supply circuit further comprises a selection switch 3. The selection switch 3 is electrically connected to the first power output end +OUT, the second power output end -OUT and the second ground end GND, and is configured to electrically connect one of the first output end Out1 and the second output end Out2 to the second ground end GND based on a received control signal. The second ground end and the first ground end access the same ground signal. In other words, when the second ground end GND is electrically connected to one of the first output end Out1 and the second output end Out2, the second input end -IN of the circuit module 1 is electrically connected to the one of the first output end Out1 and the second output end Out2 that is electrically connected.

[0073] It should be noted that the first ground end and the second ground end access the same ground signal, in order to facilitate the embodiment that the first ground end and the second ground end are the same signal, the first ground end and the second ground end are both marked with the label “GND”.

[0074] Specifically, referring to FIG. 1, Figure 3 As shown in FIG. 1, the selection switch 3 comprises a first end, a second end and a selection end, the first end is electrically connected to the first power output end -OUT, the second end is electrically connected to the second power output end +OUT, and the selection end is electrically connected to the second ground end GND. Based on a received control signal, the selection end is electrically connected to the first power output end -OUT or the selection end is electrically connected to the second power output end -OUT.

[0075] Optionally, the selection switch 3 is a relay or a single-pole double-throw switch, or other structures capable of selecting to electrically connect the first ground end GND to one of the first output end -OUT and the second output end -OUT based on a control signal.

[0076] It should be particularly noted that in the embodiment of the present disclosure, the control signal can be an electrical signal issued by the controller, or a mechanical signal generated by manual operation (for example, a toggle switch) of the user.

[0077] Because the second input end -IN is not connected to the first output end Out1, in the embodiment of the present disclosure, only when the selection switch 3 makes a selection, or in other words, only when the power supply module 1 is plugged into the connector 2, one of the first output end -OUT and the second output end +OUT can be electrically connected to the first ground end GND.

[0078] In particular, in the embodiments of the present disclosure, based on the fact that the power module 1 is not connected between the second input terminal -IN and the first output terminal Outl, the second input terminal -IN is electrically isolated from the first output terminal Outl when the power module 1 is not plugged with the connector 2, so that the power supply circuit presents two power supply architectures when the selection switch 3 is in different selection states.

[0079] With reference to the circuit principle diagram shown in Figure 4 When the selection terminal of the selection switch 3 is switched to be electrically connected with the second ground terminal GND and the second power output terminal +OUT, the circuit formed thereby is equivalent to the circuit principle diagram shown in Figure 4 That is, a Buck-Boost circuit. At this time, the Buck-Boost circuit includes two working stages.

[0080] At the first stage, the first control terminal Gl receives a high-level signal, while the second control terminal G2 receives a low-level signal, the first switch tube Ql is turned on and the second switch tube Q2 is turned off, the input signal is used to charge the first inductor L, thereby generating a charging current. The first pole of the first inductor L is "positive", the second pole is "negative", and the second capacitor C2 stores the electric charge brought by the charging current. At this time, the first capacitor Cl is used to filter the alternating component in the input signal, thereby reducing voltage ripple and electromagnetic interference (EMI).

[0081] At the second stage, the first control terminal Gl receives a low-level signal, while the second control terminal G2 receives a high-level signal, the first switch tube Ql is turned off and the second switch tube Q2 is turned on, the first inductor L discharges to form a continuation current, the first pole of the first inductor L is "negative", the second pole is "positive", and the current direction is the same as that of the charging current, and the second capacitor C2 releases the stored electric charge brought by the continuation current.

[0082] With reference to the circuit principle diagram shown in Figure 5 When the selection terminal of the selection switch 3 is switched to be electrically connected with the second ground terminal GND and the second power output terminal +OUT, the circuit formed thereby is equivalent to the circuit principle diagram shown in Figure 5 That is, a Buck-Boost circuit. At this time, the Buck-Boost circuit includes two working stages.

[0083] At the first stage, the first control terminal Gl receives a high-level signal, while the second control terminal G2 receives a low-level signal, the first switch tube Ql is turned on and the second switch tube Q2 is turned off, the input signal is used to charge the first inductor L, thereby generating a charging current, the first pole of the first inductor L is "positive", the second pole is "negative", and the second capacitor C2 stores the electric charge brought by the charging current. At this time, the first capacitor Cl is used to filter the alternating component in the input signal, thereby reducing voltage ripple and electromagnetic interference (EMI).

[0084] In the second stage, the first control terminal G1 receives a low level signal, while the second control terminal G2 receives a high level signal, the first switch Q1 is off and the second switch Q2 is on, the first inductor L discharges to form a continuation current, the first pole of the first inductor L is "negative" and the second pole is "positive", the flowing direction of the current in the first inductor L is the same as the charging current direction, and the second capacitor C2 releases the stored charge brought by the continuation current.

[0085] Those skilled in the art should understand that when the position of the second switch Q2 in Figure 3 is replaced by a diode D, the equivalent circuit diagram in which the selection terminal of the selection switch 3 is electrically connected to the first power output terminal -OUT and the second power output terminal +OUT is only different from Figure 4 and Figure 5 in that the position of the second switch Q2 is replaced by a diode D, and the anode of the diode D in the equivalent circuit diagram is electrically connected to the first power output terminal +OUT and the cathode is electrically connected to the first node N1. The working modes of Buck and Buck-Boost formed are similar to the above process, the directions of the charging current and the continuation current are the same, and details are not repeated here.

[0086] In some other optional embodiments, referring to Figure 6 , the at least one connector 2 includes a first connector, and the power supply circuit further includes: a first wire 4. The first end of the first wire 4 is electrically connected to the first pin of the first connector, and the second end is electrically connected to the second ground terminal GND, so as to form a Buck circuit.

[0087] That is, the first connector which has been arranged according to the structure of forming a Buck circuit is included in the first circuit board, so that when the power supply module 1 is plugged or electrically connected to the first connector in other ways, the formed power supply circuit can work according to the Buck topology architecture.

[0088] Alternatively, referring to Figure 7 , the at least one connector 2 includes a first connector, and the power supply circuit further includes: a first wire 4. The first end of the first wire 4 is electrically connected to the second pin of the first connector, and the second end is electrically connected to the second ground terminal GND, so as to form a Buck-Boost circuit.

[0089] That is, the first connector which has been arranged according to the structure of forming a Buck-Boost circuit is included in the first circuit board, so that when the power supply module 1 is plugged or electrically connected to the first connector in other ways, the formed power supply circuit can work according to the Buck-Boost topology architecture.

[0090] It should be noted that although Figure 3 , Figure 6 andFigure 7 The examples in the first circuit board of the power supply circuit include one connector, but are not limited thereto. In actual applications, the first circuit board can be provided with multiple connectors, which can be realized as sockets, and the arrangement of the connectors can be realized as any one of the arrangements in Figure 3 、 Figure 6 and Figure 7 . For example, some of the multiple connectors can be electrically connected with the selection switch 3, and some can be arranged in a fixed electrical connection relationship, so that the power supply circuit can be switched between the positive voltage power supply and the negative voltage power supply by the selection freedom of the selection switch 3, and can also present the positive voltage power supply and the negative voltage power supply according to the plug-in in different first connectors.

[0091] In addition, it should be noted that in the embodiments of the present disclosure, the first power supply output terminals +OUT and -OUT in the power supply circuit can also be arranged in multiple groups according to the number of connectors to realize multiple power supply outputs, or multiple connectors are connected to a group of first power supply output terminals +OUT and -OUT to realize multiple application modes of one group of outputs.

[0092] In the present embodiment, by providing a power supply circuit including a power supply module, a connector, and a power supply circuit cooperating with the second ground terminal, two topology application scenarios covering Buck and Buck-Boost power supply frameworks can be realized with a simple circuit architecture, without the need for bulky and high-cost transformer isolation structures, and have broad prospects.

[0093] Based on the same inventive concept, the embodiments of the present disclosure also provide an electronic device including the power supply circuit described in the above embodiments. The electronic device can be a signal generator, a detection device, or any device or component including the above-mentioned power supply circuit, and the present embodiment is not limited thereto.

[0094] The power supply circuit included in the above electronic device and the specific structure and functions of the power supply module therein have been described in detail in the above embodiments, and will not be repeated here.

[0095] The present disclosure aims to solve the existing problems and provides a power supply module, a power supply circuit, and an electronic device. By providing a second input terminal electrically connected with the first capacitor and electrically connected with the first ground terminal, the first output terminal and the second output terminal electrically connected with the two poles of the second capacitor can select one of them to receive the same ground signal as the first ground terminal, so that a power supply module with one circuit architecture can simultaneously satisfy the application scenarios of Buck and Buck-boost two topology structures without the need for an isolator, simplifying the circuit structure, reducing the circuit volume and cost, and having broad application prospects.

[0096] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not intended to limit the implementation manners of the present disclosure. Based on the above description, other different forms of changes or variations can be made by those skilled in the art, and it is impossible to enumerate all the implementation manners here. Any obvious changes or variations derived from the technical solutions of the present disclosure shall still fall within the protection scope of the present disclosure.

Claims

1. A power module, characterized in that, include: The first capacitor is electrically connected between the first input terminal and the second input terminal; A first switching transistor is electrically connected between the first input terminal and the first node, and is configured to electrically connect the first input terminal and the first node when the first switching transistor is turned on. The second switch is electrically connected between the first node and the first output terminal, and is configured to electrically connect the first node and the first output terminal when the second switch is turned on. The first inductor is electrically connected between the first node and the second output terminal; as well as The second capacitor is electrically connected between the first output terminal and the second output terminal. The second input terminal is electrically connected to the first ground terminal, and the second input terminal is not connected to the first output terminal.

2. The power module according to claim 1, characterized in that, The first electrode of the first switching transistor is electrically connected to the first input terminal, the second electrode is electrically connected to the first node, and the control electrode is electrically connected to the first control terminal, and is configured to be turned on based on the first control signal accessed by the first control terminal; The first electrode of the second switching transistor is electrically connected to the first node, the second electrode is electrically connected to the first output terminal, and the control electrode is electrically connected to the second control terminal, configured to conduct based on the second control signal accessed by the second control terminal.

3. The power module according to claim 1, characterized in that, The first and second switching transistors are N-type transistors, or the first and second switching transistors are P-type transistors.

4. The power module according to claim 1, characterized in that, The first capacitor and the second capacitor are electrolytic capacitors. The positive terminal of the first capacitor is electrically connected to the first input terminal, and the negative terminal is electrically connected to the second input terminal. The positive terminal of the second capacitor is electrically connected to the second output terminal, and the positive terminal is electrically connected to the first output terminal.

5. A power supply module, characterized in that, include: The first capacitor is electrically connected between the first input terminal and the second input terminal; A first switching transistor is electrically connected between the first input terminal and the first node, and is configured to electrically connect the first input terminal and the first node when the first switching transistor is turned on. A diode is electrically connected between the first node and the first output terminal; The first inductor is electrically connected between the first node and the second output terminal; as well as The second capacitor is electrically connected between the first output terminal and the second output terminal. The second input terminal is electrically connected to the first ground terminal, and the second input terminal is not connected to the first output terminal.

6. The power module according to claim 5, characterized in that, The first electrode of the first switching transistor is electrically connected to the first input terminal, the second electrode is electrically connected to the first node, and the control electrode is electrically connected to the first control terminal, and is configured to be turned on based on the first control signal accessed by the first control terminal; The cathode of the diode is electrically connected to the first node, and the anode is electrically connected to the first output terminal.

7. A power supply circuit, characterized in that, include: A first circuit board, wherein the first circuit board is provided with at least one connector; as well as The power module as described in any one of claims 1-4, or the power module as described in any one of claims 5-6, The connector includes a first pin corresponding to the first output terminal and a second pin corresponding to the second output terminal. The first pin is electrically connected to the first power output terminal of the power supply circuit, and the second pin is electrically connected to the second power output terminal of the power supply circuit. The power module is electrically connected to one of the at least one connectors. When the power circuit is in use, the first output terminal is electrically connected to the second ground terminal or the second output terminal is electrically connected to the second ground terminal. The second ground terminal and the first ground terminal are connected to the same ground signal.

8. The power supply circuit according to claim 7, characterized in that, Also includes: A selector switch is electrically connected to the first power output terminal, the second power output terminal, and the second ground terminal, and configured to electrically connect one of the first output terminal and the second output terminal to the second ground terminal based on a received control signal.

9. The power supply circuit according to claim 7, characterized in that, The at least one connector includes a first connector, and the power circuit further includes a first trace. The first end of the first trace is electrically connected to the first pin of the first connector, and the second end is electrically connected to the second ground terminal; or the first end of the first trace is electrically connected to the second pin of the first connector, and the second end is electrically connected to the second ground terminal.

10. An electronic device, characterized in that, Includes the power supply circuit as described in any one of claims 7-9.

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