Switching power supply and electronic device

Abstract

The utility model provides a switching power supply and electronic equipment, and the switching power supply comprises a first branch circuit, a second branch circuit, and a switching assembly. The first branch is provided with a first functional component used for suppressing impact current generated by a target element; the second branch is connected with the first branch in parallel; the target element is connected with the first branch circuit and the second branch circuit through the switching assembly; wherein the target element is conducted with the first branch circuit through the switching assembly, and if the target element meets the switching condition, the target element can be conducted with the second branch circuit through the switching assembly.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a switching power supply and an electronic device. Background Art

[0002] Electrolytic capacitors are widely used in various electronic products. During operation, after the electronic device is connected to the mains, the internal electrolytic capacitor will be charged. When the electrolytic capacitor is fully charged, the power supply of the electronic device can be turned on to power other components of the electronic device.

[0003] However, at the moment when the electronic product is started, the electrolytic capacitor will have a momentary surge current with a large amplitude, which will cause safety problems to users. Utility Model Content

[0004] A first aspect of the present disclosure provides a switching power supply, comprising:

[0005] A first branch, the first branch being provided with a first functional component for suppressing an inrush current generated by a target element;

[0006] The second branch is connected in parallel with the first branch;

[0007] A switching component, wherein the target element is connected to the first branch and the second branch respectively through the switching component;

[0008] The target element is connected to the first branch through the switching component. If the target element meets the switching condition, the target element can be connected to the second branch through the switching component.

[0009] Furthermore, the switching power supply further comprises:

[0010] a target power source, the target power source being connected to the switching component, the target element having a second state, a first state, and a second state;

[0011] The switching conditions are: when in the first state of the second state, the target power supply does not have the power supply capability, and the target element can be connected to the first branch through the switching component; when the target element is in the second state, the target power supply has the power supply capability, and the target element is connected to the second branch through the switching component.

[0012] Furthermore, the switching component includes:

[0013] The first switching component is used to connect the target element to the first branch and the second branch respectively, so as to switch the first branch or the second branch to be conductive with the target element. The first switching component is connected to the target power supply and then grounded.

[0014] Furthermore, the target power supply includes:

[0015] a first sub-power supply and a second sub-power supply, wherein when the target element is in the second state, the first sub-power supply can release a negative voltage and the second sub-power supply can release a positive voltage;

[0016] The switching components include:

[0017] a second switching component, the second switching component being connected in series with the first functional component and connected to the first sub-power supply, and when the target element is in the second state (the first state), the second switching component turns on the first branch, and when the target element is in the second state, the second switching component turns off the first branch;

[0018] The third switching component is connected in series in the second branch, and the third switching component is connected to the second sub-power supply. When the target element is in the second state or the first state, the third switching component disconnects the second branch; when the target element is in the second state, the third switching component connects the second branch.

[0019] Furthermore, the switching power supply further comprises:

[0020] The second functional component is arranged in the second branch. If the current in the second branch is in an abnormal state, the second functional component disconnects the second branch.

[0021] Furthermore, the switching power supply further includes: a third functional component, which is connected in parallel with the first switching component and is used to protect the first switching component.

[0022] Furthermore, the switching power supply further comprises:

[0023] a fourth functional component, the fourth functional component being disposed between the first sub-power supply and the second switching component to divide the voltage of the second switching component;

[0024] The fifth functional component is arranged between the second sub-power supply and the third switching component to divide the voltage for the third switching component.

[0025] Furthermore, the switching power supply further comprises:

[0026] a sixth functional component, the sixth functional component being connected to the first sub-power supply and connected in parallel with the second switching component, and being capable of stabilizing the voltage of the first branch;

[0027] The seventh functional component is connected to the second sub-power supply, the seventh functional component is connected in parallel with the third switching component, and the seventh functional component can stabilize the voltage of the second branch.

[0028] Furthermore, the switching power supply further comprises:

[0029] an eighth functional component, the eighth functional component being connected in parallel with the second switching component and the sixth functional component, and being capable of stabilizing the voltage of the first branch;

[0030] A ninth functional component is connected in parallel with the third switching component and the seventh functional component, and the ninth functional component can stabilize the voltage of the second branch.

[0031] A second aspect of the present disclosure provides an electronic device, comprising:

[0032] Electronic device body;

[0033] The switching power supply is provided in the electronic device body and includes:

[0034] A first branch, the first branch being provided with a first functional component for suppressing an inrush current generated by a target element;

[0035] The second branch is connected in parallel with the first branch;

[0036] A switching component, wherein the target element is connected to the first branch and the second branch respectively through the switching component;

[0037] The target element is connected to the first branch through the switching component. If the target element meets the switching condition, the target element can be connected to the second branch through the switching component. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0039] Figure 1 The structure diagram of the first switching power supply is schematically shown;

[0040] Figure 2 The structure diagram of the second switching power supply is schematically shown;

[0041] Figure 3 The diagram schematically shows the relationship between the motor capacitor current and time;

[0042] Figure 4 A first electronic device circuit diagram is schematically shown;

[0043] Figure 5 A second electronic device circuit diagram is schematically shown.

[0044] Description of Figure Numbers:

[0045] 1. First branch; 101. First functional component;

[0046] 2. Second branch; 201. Second functional component;

[0047] 3. Switching assembly; 301. First switching component; 302. Second switching component; 303. Third switching component;

[0048] 4. Target component;

[0049] 5. Target power source; 501. First sub-power source; 502. Second sub-power source;

[0050] 6. Third functional component; 7. Fourth functional component; 8. Fifth functional component; 9. Sixth functional component; 10. Seventh functional component; 11. Eighth functional component; 12. Ninth functional component;

[0051] A, first connection end; B, second connection end; C, third connection end; D, fourth connection end. DETAILED DESCRIPTION

[0052] The following embodiments of the present disclosure are further described in detail with reference to the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present disclosure, but are not intended to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but rather includes all technical solutions within the scope of the claims.

[0053] The present disclosure provides these embodiments in order to make this disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be interpreted as merely exemplary, and not as limiting.

[0054] It should be noted that, in the description of this disclosure, unless otherwise specified, "plurality" means greater than or equal to two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are intended solely to facilitate and simplify the description of this disclosure, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0055] In addition, the terms "first," "second," and similar terms used in this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different parts. "Perpendicular" does not mean perpendicular in the strict sense, but rather means within the tolerance range. "Parallel" does not mean parallel in the strict sense, but rather means within the tolerance range. "Include" or "comprising" and similar terms mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements.

[0056] Example 1

[0057] like Figure 1 As shown, embodiment 1 of the first aspect of the present disclosure provides a first switching power supply, which includes: a first branch 1, a second branch 2 and a switching component 3; the first branch 1 is provided with a first functional component 101 for suppressing the impact current generated by the target element 4; the second branch 2 is connected in parallel with the first branch 1; the target element 4 is respectively connected to the first branch 1 and the second branch 2 through the switching component 3; wherein, the target element 4 is connected to the first branch 1 through the switching component 3, and if the target element 4 meets the switching condition, the target element 4 can be connected to the second branch 2 through the switching component 3.

[0058] Specifically, the target component 4 can be an electrolytic capacitor required by an electronic device, and the first functional component 101 can be a resistor or a thermistor, without limitation to their specific form. In this embodiment, the first functional component 101 can be a negative temperature coefficient thermistor, whose resistance gradually decreases with increasing temperature. During use, the target component 4 generates an inrush current for approximately 772 μs. After suppressing the inrush current and before the target component 4 meets the switching condition, the temperature of the negative temperature coefficient thermistor gradually increases and the resistance gradually decreases as the current flows, thereby reducing the impact of the first functional component 101 on the electronic device in which the target component 4 is located.

[0059] Second branch 2 can be a conductive channel, such as a conventional wire or metal conductive pin, and is not specifically limited thereto. Target element 4 is connected to second branch 2 and first branch 1, respectively, via switching component 3. Switching component 3 can be a relay with a timed switching function. The time from the onset to the disappearance of the inrush current is set as a target time interval. Switching component 3 initially connects target element 4 to first branch 1. When the target time interval expires, switching component 3 switches target element 4 to second branch 2. The specific form of switching component 3 is not limited thereto.

[0060] like Figure 3As shown in the figure, at the moment of startup, the electrolytic capacitor inside the electronic device will generate an inrush current. At this time, the electrolytic capacitor is in an unstable first state. The amplitude of the inrush current is very large, but the duration is very short. Taking a 260W power supply as an example, at the moment of startup, the inrush current of the electrolytic capacitor of the electronic device can be as high as 170A, but the duration is only 772μs. After the inrush current flows, the electrolytic capacitor enters a stable second state. The current flowing through the electrolytic capacitor is a relatively stable value. At this time, the current amplitude is much smaller than the inrush current amplitude.

[0061] In a first aspect of the present disclosure, embodiment 1 provides a switching power supply, comprising: a first branch 1, a second branch 2, and a switching assembly 3. The first branch 1 has a first functional component 101, which is capable of suppressing the inrush current generated by a target element 4. The second branch 2 is connected in parallel with the first branch 1. The target element 4 is connected to the first branch 1 and the second branch 2, respectively, via the switching assembly 3. In an initial state, the target element 4 is connected to the first branch 1. When the target element 4 is turned on, an inrush current is generated. The inrush current is suppressed when it passes through the first functional component 101, effectively avoiding the harm caused by the inrush current. When the target element 4 meets the switching condition, the target element 4 no longer generates the inrush current, and the switching assembly 3 switches the target element 4 to conduction with the second branch 2, thereby reducing the impact of the first functional component 101 on the normal operation of the electronic device in which the switching power supply is located. This effectively suppresses the inrush current generated by the target element 4 when it is turned on, avoiding safety issues caused by the inrush current to users.

[0062] like Figure 1 As shown, in some embodiments, the switching power supply further includes: a target power supply 5, the target power supply 5 is connected to the switching component 3, and the target element 4 has a second state, a first state, and a second state; the switching condition is: when in the second state, the first state, the target power supply 5 does not have the power supply capability, and the target element 4 can be connected to the first branch 1 through the switching component 3; when the target element 4 is in the second state, the target power supply 5 has the power supply capability, and the target element 4 is connected to the second branch 2 through the switching component 3.

[0063] Specifically, the first state of target component 4 is when target component 4 is charged to 0-95% of its charge level, and the second state of target component 4 is when target component 4 is charged to above 95%. Target power supply 5 can be installed in the motherboard or power supply assembly of the electronic device where target component 4 is located. The connection between target power supply 5 and target component 4 can be established via a standard electrolytic capacitor and power supply connection circuit. When target component 4 is in the first state, target component 4 is unstable and unable to supply power to target power supply 5, thus lacking power supply capability. When target power supply 5 is in the second state, target component 4 is relatively stable and able to supply power to target power supply 5, thus ensuring power supply capability. It should be noted that the power supply capability of target power supply 5 refers to the ability of target power supply 5 to provide electrical energy to other electrical components. When target power supply 5 has power supply capability, switching component 3 can be powered, and switching component 3 satisfies the switching condition, switching target component 4, which was previously connected to first branch 1, to second branch 2. Similarly, when the target power source 5 is no longer able to supply power, the switching component 3 can no longer be powered, and the switching component 3 switches back to the target component 4 and connects it to the first branch 1. This setting is simple to operate and can ensure that the inrush current in the first branch 1 is suppressed and the switching is accurate.

[0064] like Figure 1 As shown, in some embodiments, the switching component 3 includes: a first switching component 301, and the target element 4 is connected to the first branch 1 and the second branch 2 respectively through the first switching component 301 to switch the first branch 1 or the second branch 2 to be able to conduct with the target element 4, and the first switching component 301 is connected to the target power supply 5 and then grounded.

[0065] Specifically, the first switching component 301 can be a component capable of switching a circuit upon receiving an electrical signal. In this embodiment, a relay can be employed. The target element 4 is connected to the first branch 1 and the second branch 2 via the first switching component 301. The first switching component 301 is also connected to the target power source 5. When the switching assembly 3 detects that the target power source 5 is capable of supplying power, it can release an electrical signal to the first switching component 301. Upon receiving the electrical signal, the first switching component 301 switches the target element 4 from being electrically conductive with the first branch 1 to being electrically conductive with the second branch 2. When the target power source 5 is in the second state, the first switching component 301 cannot receive electrical signals and switches to its initial state, where the first switching component 301 connects the target element 4 to the first branch 1.

[0066] like Figure 1As shown, in some embodiments, the switching power supply further includes: a second functional component 201, which is arranged in the second branch 2. If the current in the second branch 2 is in an abnormal state, the second functional component 201 disconnects the second branch 2.

[0067] Specifically, the second functional component 201 can be a component capable of disconnecting the circuit when an abnormal current flows. In this embodiment, the second functional component 201 can be a fuse. The second functional component 201 is connected in series with the second branch 2. When an abnormality occurs in the circuit of the electronic device in the switching power supply, resulting in excessive current, the second functional component 201 can promptly disconnect the second branch 2 to prevent damage to the components of the electronic device. After the second functional component 201 is disconnected, the target element 4 transitions from the second state to the first state, and the switching component 3 switches the target element 4 to conduction with the first branch 1. The first functional component 101 provided in the first branch 1 can effectively suppress the excessive current caused by the abnormality, allowing the electronic device to continue to operate normally.

[0068] like Figure 1 As shown, in some embodiments, the switching power supply further includes: a third functional component 6 , which is connected in parallel with the first switching component 301 and is used to protect the first switching component 301 .

[0069] Specifically, the third functional component 6 can be a component that can achieve unidirectional conduction. In this embodiment, the third functional component 6 can be a diode, which is connected in parallel with the first switching component 301 to prevent the current from flowing backward during operation, thereby causing damage to the first switching component 301.

[0070] Example 2

[0071] like Figure 2As shown, the second embodiment of the first aspect of the present disclosure provides a second switching power supply, wherein the target power supply 5 of the second switching power supply includes: a first sub-power supply 501 and a second sub-power supply 502. When the target element 4 is in the second state, the first sub-power supply 501 can release a negative voltage, and the second sub-power supply 502 can release a positive voltage; the switching component 3 of the second switching power supply includes: a second switching component 302 and a third switching component 303; the second switching component 302 is connected in series with the first functional component 101, and the second switching component 302 is connected to the first sub-power supply 502. The power supply 501 is connected. When the target element 4 is in the first state of the second state, the second switching component 302 turns on the first branch 1. When the target element 4 is in the second state, the second switching component 302 turns off the first branch 1. The third switching component 303 is connected in series to the second branch 2. The third switching component 303 is connected to the second sub-power supply 502. When the target element 4 is in the first state of the second state, the third switching component 303 turns off the second branch 2. When the target element 4 is in the second state, the third switching component 303 turns on the second branch 2.

[0072] Specifically, the second switching component 302 may be in a normally closed state and switch to an open state when receiving a negative electrical signal, and in this embodiment, a depletion-type NMOS may be used. The third switching component 303 may be in a normally open state and switch to a closed state when receiving a positive electrical signal, and in this embodiment, a thyristor may be used.

[0073] When target element 4 is in the first state, first sub-power source 501 and second sub-power source 502 are unable to supply power. At this point, second switching component 302 is in a normally closed state, turning first branch 1 on, while third switching component 303 is in a normally open state, turning second branch 2 off. Current can flow from target element 4 to first branch 1, establishing electrical connection between target element 4 and first branch 1. When target power source 5 is in the second state, first sub-power source 501 can release a negative voltage signal, while second sub-power source 502 can release a positive voltage signal. This causes second switching component 302 and third switching component 303 to receive negative and positive voltage signals, respectively. Second switching component 302 switches to an off state, while third switching component 303 switches to an on state, allowing current to flow through target element 4 to second branch 2, establishing electrical connection between target element 4 and second branch 2. This achieves reciprocating switching between first branch 1 and second branch 2. This configuration ensures a more stable switching process, with no audible noise, enhancing the user experience.

[0074] like Figure 2As shown, in some embodiments, the switching power supply further includes: a fourth functional component 7 and a fifth functional component 8; the fourth functional component 7 is arranged between the first sub-power supply 501 and the second switching component 302 to divide the voltage of the second switching component 302; the fifth functional component 8 is arranged between the second sub-power supply 502 and the third switching component 303 to divide the voltage of the third switching component 303.

[0075] Specifically, the first functional component 101 and the fifth functional component 8 are components capable of voltage division. In this embodiment, the fourth functional component 7 and the fifth functional component 8 can be voltage-dividing resistors. The fourth and fifth functional components 7 and 8 can be the same resistor or different resistors, depending on the parameters of the second switching component 302 and the third switching component 303. The fourth functional component 7 is connected in series between the first sub-power supply 501 and the second switching component 302, and the fifth functional component 8 is connected in series between the second sub-power supply 502 and the third switching component 303, respectively, to divide the voltage between the first branch 1 and the second branch 2. This improves the safety of the switching power supply.

[0076] like Figure 2 As shown, in some embodiments, the switching power supply further includes: a sixth functional component 9 and a seventh functional component 10; the sixth functional component 9 is connected to the first sub-power supply 501, and the sixth functional component 9 is connected in parallel with the second switching component 302, and the sixth functional component 9 can stabilize the voltage of the first branch 1; the seventh functional component 10 is connected to the second sub-power supply 502, and the seventh functional component 10 is connected in parallel with the third switching component 303, and the seventh functional component 10 can stabilize the voltage of the second branch 2.

[0077] Specifically, the sixth functional component 9 and the seventh functional component 10 are components capable of achieving voltage stabilization. In this embodiment, voltage regulator diodes can be selected. The sixth functional component 9 and the seventh functional component 10 can be the same voltage regulator diode or different voltage regulator diodes, and the selection can be based on the parameters of the second switching component 302 and the third switching component 303. In this embodiment, the sixth functional component 9 is connected in series with the fourth functional component 7 and in parallel with the second switching component 302 to achieve voltage stabilization for the first branch 1. The seventh functional component 10 is connected in series with the fifth functional component and in parallel with the third switching component 3 to achieve voltage stabilization for the second branch 2. The voltage stabilization of the first branch 1 and the second branch 2 by the sixth functional component 9 and the seventh functional component 10, respectively, can further enhance the safety of the switching power supply.

[0078] like Figure 2As shown, in some embodiments, the switching power supply further includes: an eighth functional component 11 and a ninth functional component 12; the eighth functional component 11 is connected in parallel with the second switching component 302 and the sixth functional component 9, and the eighth functional component 11 can stabilize the voltage of the first branch 1; the ninth functional component 12 is connected in parallel with the third switching component 303 and the seventh functional component 10, and the ninth functional component 12 can stabilize the voltage of the second branch 2.

[0079] Specifically, the eighth functional component 11 and the ninth functional component 12 are components capable of achieving voltage stabilization. The eighth functional component 11 can be the same component as the ninth functional component 12 or a different component, and can be selected based on the measured parameters of the second switching component 302 and the third switching component 303. The eighth functional component 11 and the ninth functional component 12 can also be the same components as the sixth functional component 9 and the seventh functional component 10, without specific limitation. In this embodiment, the eighth functional component 11 and the ninth functional component 12 can be two solid-state capacitors. The eighth functional component 11 is connected in parallel with the sixth functional component 9. The ninth functional component 12 is connected in parallel with the seventh functional component 10 to achieve voltage stabilization for the first branch 1 and the second branch 2, respectively. This arrangement enables the eighth functional component 11 and the ninth functional component 12 to provide better voltage stabilization for the first branch 1 and the second branch 2, respectively, thereby enhancing the safety and stability of the switching power supply.

[0080] The remaining features of the second switching power supply provided in Example 2 of the first aspect of the present disclosure are the same as those of the first switching power supply provided in Example 1 of the first aspect of the present disclosure. For details, please refer to the contents described in Example 1, which will not be repeated here.

[0081] Example 3

[0082] Embodiment 3 of the second aspect of the present disclosure provides an electronic device, comprising: an electronic device body and a switching power supply; the switching power supply is arranged in the electronic device body; wherein the switching power supply comprises: a first branch 1, a second branch 2 and a switching component 3; the first branch 1 is provided with a first functional component 101 for suppressing the impact current generated by the target element 4; the second branch 2 is connected in parallel with the first branch 1; the target element 4 is respectively connected to the first branch 1 and the second branch 2 through the switching component 3; wherein the target element 4 is connected to the first branch 1 through the switching component 3, and if the target element 4 meets the switching condition, the target element 4 can be connected to the second branch 2 through the switching component 3.

[0083] like Figure 4As shown, specifically, the switching power supply has a first connection terminal A and a second connection terminal B, and the electronic device body has a third connection terminal C and a fourth connection terminal D of a functional circuit inside. The first connection terminal A and the second connection terminal B of the switching power supply are respectively connected to the third connection terminal C and the fourth connection terminal D of the functional circuit inside the electronic device body, so that the switching power supply works on the electronic device body.

[0084] The switching power supply may further include: a target power supply 5, the target power supply 5 being connected to the switching component 3, and the target element 4 having a second state, a first state, and a second state; the switching condition being: when in the second state, the target power supply 5 is unable to supply power, and the target element 4 is able to conduct with the first branch through the switching component 3; when the target element 4 is in the second state, the target power supply 5 is able to supply power, and the target element 4 is able to conduct with the second branch through the switching component 3. The switching power supply may have the following two structures to adapt to different working environments and working requirements:

[0085] Case 1

[0086] like Figure 4 As shown, the switching assembly 3 may include a first switching component 301. The target element 4 is connected to the first branch and the second branch via the first switching component 301, respectively, to switch between the first branch and the second branch to enable conduction with the target element 4. The first switching component 301 is connected to the target power source 5 and then grounded. When the electronic device is initially powered on, the target element 4 is connected to the first branch via the first switching component 301. The inrush current generated by the target element 4 is suppressed by the first functional component. Subsequently, when the switching condition is met, the first functional component switches the target element 4 to conduction with the second branch, ensuring normal power supply to the electronic device. This configuration is simple in structure and low in cost, making it suitable for low-cost applications.

[0087] Case 2

[0088] like Figure 5 As shown, the target power supply 5 includes: a first sub-power supply 501 and a second sub-power supply 502. When the target element 4 is in the second state, the first sub-power supply 501 can release a negative voltage, and the second sub-power supply 502 can release a positive voltage.

[0089] Switching component 3 includes:

[0090] The second switching component 302 and the third switching component 303; the first sub-power supply 501 and the second sub-power supply 502, when the target element 4 is in the second state, the first sub-power supply 501 can release a negative voltage, and the second sub-power supply 502 can release a positive voltage; the second switching component 302 is connected in series with the first functional component, and the second switching component 302 is connected to the first sub-power supply 501, when the target element 4 is in the second state or the first state, the second switching component 302 makes the first branch conductive, and when the target element 4 is in the second state, the second switching component 302 makes the first branch disconnected; the third switching component 303 is connected in series with the second branch, and the third switching component 303 is connected to the second sub-power supply 502, when the target element 4 is in the second state or the first state, the third switching component 303 makes the second branch disconnected, and when the target element 4 is in the second state, the third switching component 303 makes the second branch conductive. When the electronic device is first started, the target power supply 5 is not capable of supplying power. The second switching component 302 is in a normally closed state, and the first switching component 301 is in a normally open state. The target power supply 5 is connected to the first branch, and the first functional component is able to suppress the surge current generated by the target element 4. When the switching conditions are met, the second switching component 302 is switched to a normally open state, and the third switching component 303 is switched to a normally closed state. The target element 4 is then connected to the second branch, thereby ensuring normal power supply to the electronic device. This configuration eliminates the need for audible noise during the switching process between the first branch and the second branch, meeting the requirements of environments with high noise requirements. A third embodiment of the second aspect of the present disclosure provides an electronic device having an internal switching power supply comprising a first branch 1, a second branch 2, and a switching component 3. In the initial state, the target element 4 is connected to the first branch 1. When the target element 4 is turned on, an inrush current is generated. The inrush current is suppressed when it passes through the first functional component 101, effectively avoiding the harm caused by the inrush current. When target element 4 meets the switching conditions and no longer generates inrush current, switching assembly 3 switches target element 4 to conduction with second branch 2, minimizing the impact of first functional component 101 on the normal operation of the electronic device in which the switching power supply resides. This configuration effectively prevents the impact of inrush current on electronic devices, improves their safety, and enhances user experience.

[0091] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

[0092] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.

[0093] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.

[0094] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

Claims

1. A switching power supply, characterized in that: include: a first branch, wherein the first branch is provided with a first functional component for suppressing an inrush current generated by a target element; a second branch, the second branch being connected in parallel with the first branch; a switching component, wherein the target element is connected to the first branch and the second branch respectively through the switching component; The target element is connected to the first branch through the switching component. If the target element meets a switching condition, the target element can be connected to the second branch through the switching component.

2. The switching power supply according to claim 1, characterized in that: Also includes: a target power source, the target power source being connected to the switching component, the target element having a second state, a first state, and a second state; The switching condition is: when in the first state of the second state, the target power supply does not have the power supply capability, and the target element can be connected to the first branch through the switching component; when the target element is in the second state, the target power supply has the power supply capability, and the target element is connected to the second branch through the switching component.

3. The switching power supply according to claim 2, wherein: The switching component includes: The target element is connected to the first branch and the second branch respectively through the first switching component to switch the first branch or the second branch to be conductive with the target element. The first switching component is grounded after being connected to the target power supply.

4. The switching power supply according to claim 2, characterized in that: The target power supply includes: a first sub-power supply and a second sub-power supply, wherein when the target element is in the second state, the first sub-power supply can release a negative voltage, and the second sub-power supply can release a positive voltage; The switching component includes: a second switching component, the second switching component being connected in series with the first functional component and connected to the first sub-power supply, and the second switching component turning on the first branch when the target element is in the second state (the first state), and turning off the first branch when the target element is in the second state; a third switching component, the third switching component being connected in series in the second branch, the third switching component being connected to the second sub-power supply, and when the target element is in the second state or the first state, the third switching component disconnects the second branch, and when the target element is in the second state, the third switching component connects the second branch.

5. The switching power supply according to claim 1, wherein: Also includes: The second functional component is provided in the second branch. If the current in the second branch is in an abnormal state, the second functional component disconnects the second branch.

6. The switching power supply according to claim 3, characterized in that: Also includes: A third functional component is connected in parallel with the first switching component and is used to protect the first switching component.

7. The switching power supply according to claim 4, characterized in that: Also includes: a fourth functional component, the fourth functional component being disposed between the first sub-power supply and the second switching component to perform voltage division on the second switching component; A fifth functional component is provided between the second sub-power supply and the third switching component to divide the voltage for the third switching component.

8. The switching power supply according to claim 4 or 7, characterized in that: Also includes: a sixth functional component, the sixth functional component being connected to the first sub-power supply, the sixth functional component being connected in parallel with the second switching component, and the sixth functional component being capable of stabilizing the voltage of the first branch circuit; A seventh functional component is connected to the second sub-power supply, the seventh functional component is connected in parallel with the third switching component, and the seventh functional component can stabilize the voltage of the second branch.

9. The switching power supply according to claim 8, characterized in that: Also includes: an eighth functional component, the eighth functional component being connected in parallel with the second switching component and the sixth functional component, and the eighth functional component being capable of stabilizing the voltage of the first branch; A ninth functional component is connected in parallel with the third switching component and the seventh functional component, and the ninth functional component is capable of stabilizing the voltage of the second branch.

10. An electronic device, characterized in that: include: Electronic device body; A switching power supply is provided in the electronic device body, comprising: a first branch, wherein the first branch is provided with a first functional component for suppressing an inrush current generated by a target element; a second branch, the second branch being connected in parallel with the first branch; a switching component, wherein the target element is connected to the first branch and the second branch respectively through the switching component; The target element is connected to the first branch through the switching component. If the target element meets a switching condition, the target element can be connected to the second branch through the switching component.

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