CN218733827U

CN218733827U - Switch power supply

Info

Publication number: CN218733827U
Application number: CN202222115873.XU
Authority: CN
Inventors: 侯永军; 白青刚
Original assignee: Shenzhen ICM Microelectronics Co Ltd
Current assignee: Shenzhen Chuangxin Microelectronics Co ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2023-03-24
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses a switching power supply relates to switching power supply technical field, and this switching power supply includes: the PCB is arranged in the switching power supply, the first discharge structure is arranged at a high-voltage area of the PCB, and the second discharge structure is arranged at a low-voltage area of the PCB; the first discharge structure is provided with a first discharge tip and is connected with the ground end in the high-voltage region; the second discharge structure has a second discharge tip, the second discharge structure being connected to a ground within the low-voltage region; static electricity of a high-voltage area and a low-voltage area of the PCB is released in the air through a discharging tip of the discharging structure, and the static electricity is prevented from directly flowing through electronic components on the PCB, so that the electronic components are protected from being damaged by the static electricity, and the static electricity protection capability of the PCB is improved.

Description

Switch power supply

Technical Field

The utility model relates to the technical field of power supplies, in particular to switching power supply.

Background

Printed Circuit Boards (PCBs) are carriers of electronic components, which are widely used in various electronic products with the advantages of high reliability, light weight, and miniaturization; the influence of static electricity on the specific application process of the PCB is common, and once small and precise electronic components are subjected to electrostatic breakdown, the whole PCB is subjected to breakdown, so that the use of corresponding electronic products is influenced; static still has the characteristic of adsorbing the dust, and some require higher electronic components to the heat dissipation, in case adsorb more dust, can influence its heat dispersion to shorten the life-span of components and parts.

At present, the conventional way to eliminate PCB static electricity is: connecting an external plug connector with an internal circuit through an Electro-Static discharge (ESD) protection device, and eliminating Static electricity through the ESD device; the method can avoid the influence of external static electricity on the PCB, but has weak protection capability on the static electricity of the PCB.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a switching power supply to solve the problem of the prior art that the PCB has a weak electrostatic protection capability.

Based on the technical problem, the utility model provides a switching power supply, include:

the PCB is arranged in the switching power supply, the first discharge structure is arranged at a high-voltage area of the PCB, and the second discharge structure is arranged at a low-voltage area of the PCB;

the first discharge structure is provided with a first discharge tip and is connected with the ground end in the high-voltage region;

the second discharge structure has a second discharge tip, and the second discharge structure is connected to a ground terminal within the low-voltage region.

The scheme has the following beneficial effects:

the utility model discloses a switching power supply's PCB structure and switching power supply, high nip and low-pressure area at PCB set up respectively have the most advanced structure of discharging, and the structure of discharging of high nip links to each other with the ground of high nip, the structure of discharging of low-pressure area links to each other with the ground of low-pressure area, the high nip and the static of low-pressure area through the most advanced release PCB's of discharging in the air of discharging of structure, avoid static direct electronic components from PCB to flow through, thereby protect electronic components not damaged by static, improve the electrostatic protection ability of PCB self.

Optionally, the first discharge structure includes a first discharge portion and a second discharge portion, one end of the first discharge portion is connected with one end of the second discharge portion to form an L shape, and the other end of the second discharge portion is provided with the first discharge tip.

Optionally, the second discharge structure is a trapezoid, and the second discharge tip is disposed on a bottom side of the trapezoid of the second discharge structure.

Optionally, the first discharge tip and the second discharge tip are spaced apart by a predetermined distance.

Optionally, a groove is provided in the high voltage region or the low voltage region of the PCB.

Optionally, the PCB comprises a front side circuit board and a back side circuit board,

the front circuit board is provided with a bridge rectifier, a main control chip, an optocoupler module and a synchronous rectification chip;

the bridge rectifier is arranged in the high-voltage area of the front circuit board, and the main control chip, the optocoupler module and the synchronous rectifier chip are arranged in the low-voltage area of the front circuit board.

Optionally, the back circuit board is provided with a transformer, a first capacitor, a second capacitor, a third capacitor, a fuse, an inductor and a power supply terminal;

the first capacitor, the second capacitor, the fuse, the inductor and the power supply terminal are arranged in a high-voltage area of the back circuit board;

the transformer and the third capacitor are arranged in a low-voltage area of the back side circuit board.

Optionally, the switching power supply further includes: a housing, the PCB being disposed internally within the housing.

Optionally, the housing is a cube structure, and a baffle for fixing the PCB is arranged inside the housing.

Optionally, any surface of the shell is provided with a circular threading hole.

Drawings

Fig. 1 is a schematic structural diagram of a first PCB provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second PCB provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a front side circuit board of a PCB according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a PCB back side circuit board according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a housing of a switching power supply provided in an embodiment of the present invention;

the symbols are as follows:

1. a high pressure region; 2. a low-pressure region; 11. a first discharge structure; 110. a first discharge portion; 111. a second discharge portion; 12. bridge rectifier; 13. a first capacitor; 14. a second capacitor; 15. a groove; 16. a fuse; 17. an inductance; 18. a power supply terminal; 21. a second discharge structure; 22. a third capacitor; 23. a synchronous rectification chip; 24. an optocoupler module; 25. a main control chip; 26. a transformer; 3. fixing a baffle plate; 4. and (6) threading holes.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail.

It should be appreciated that the embodiments set forth below represent the necessary information to enable those skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure and the accompanying claims.

It will be further understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will also be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

It will also be understood that the terms "upper," "lower," "left," "right," "front," "back," "bottom," "middle," "top," and the like may be used herein to describe various elements, the indicated orientations or positional relationships being based on the orientations or positional relationships illustrated in the figures, and are intended to merely facilitate description of the invention and simplify the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, these elements should not be limited by these terms.

These terms are only used to distinguish one element from another element. For example, a first element could be termed an "upper" element, and similarly, a second element could be termed an "upper" element, depending on the relative orientation of the elements, without departing from the scope of the present disclosure.

It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In one embodiment, there is provided a switching power supply including: the PCB is arranged in the switching power supply, the structure of the PCB is shown in figure 1, the PCB comprises a high-voltage area 1 and a low-voltage area 2, a first discharge structure 11 is arranged in the high-voltage area 1, the first discharge structure 11 is connected with the ground end of the high-voltage area 1, and meanwhile, the first discharge structure 11 is provided with a first discharge tip; a second discharge structure 21 is arranged in the low-voltage region 2, the second discharge structure 21 being connected to the ground of the low-voltage region 2, while the second discharge structure 21 is provided with a second discharge tip.

It should be noted that the structure and position of the first discharge structure 11 and the second discharge structure 21 are not limited to those shown in fig. 1, and may be adjusted according to the layout of the PCB.

The electrostatic discharge process of the switching power supply comprises the following steps: when static electricity exists in the high voltage area 1 of the PCB and static electricity does not exist in the low voltage area 2, the first discharging structure 11 of the high voltage area 1 and the second discharging structure 21 of the low voltage area 2 generate a static electricity potential difference, and due to the discharging tips respectively arranged on the first discharging structure 11 and the second discharging structure 21, the discharging tips generate a tip discharging effect under the condition of the existence of the potential difference, so that the static electricity of the high voltage area 1 is discharged to the low voltage area 2 through an air medium; on the contrary, when there is static electricity in the low voltage region 2 and no static electricity in the high voltage region 1 of the PCB, the two discharging structures discharge the static electricity in the low voltage region 2 to the high voltage region 1 through the air medium.

The switching power supply of this embodiment, the discharge point through the structure that discharges that sets up on the PCB releases the static of PCB's high-voltage region and low-voltage region in the air, avoids static direct electronic components from the PCB to flow through to protect electronic components not damaged by static, improve PCB's self electrostatic protection ability.

In one embodiment, there is provided a switching power supply including: the PCB is internally arranged in the switching power supply, and the structure of the PCB is shown in fig. 2, the PCB comprises a high voltage region 1 and a low voltage region 2, a first discharge structure 11 is arranged in the high voltage region 1, and a second discharge structure 21 is arranged in the low voltage region 2, wherein the first discharge structure 11 comprises a first discharge part 110 and a second discharge part 111, one end of the first discharge part 110 is electrically connected with one end of the second discharge part 111 to form an L shape; as other embodiments, different shapes may be formed according to the position of the ground end, for example, a straight shape or an N shape; a first discharge tip is provided at the other end of the second discharge portion 111 to enable the PCB high voltage region 1 to form a tip discharge effect, thereby discharging static electricity of the high voltage region 1.

The second discharge structure 21 is a trapezoid structure, and a second discharge tip is disposed at a bottom side of the trapezoid of the second discharge structure 21, so that the PCB low voltage region 2 can form a tip discharge effect, thereby discharging static electricity of the low voltage region 2.

In other embodiments, the second discharge structure 21 may have other shapes, such as a diamond shape, a square shape, or a rectangular shape, and the above-described effects can be achieved.

The first discharge structure 11 and the second discharge structure 21 in this embodiment are made of metal, and may be made by copper plating or other methods, such as welding.

The discharge tip of the first discharge structure 11 and the discharge tip of the second discharge structure 21 are arranged opposite to each other, and a certain distance is preset between the discharge tips and the discharge tips, and the distance can be set according to the size of static electricity generated by a designed circuit; the discharge tip of the first discharge structure 11 and the discharge tip of the second discharge structure 21 can discharge static electricity of the high voltage region 1 or the low voltage region 2 having a higher electrostatic potential to another region having a lower electrostatic potential through air to ensure that electronic components of the PCB are not damaged.

The switching power supply of this embodiment, the positive subtend setting of the tip that discharges through the structure that discharges that sets up on the PCB to predetermine certain distance according to the static size on the PCB, through the tip that discharges the static of PCB high-voltage region and low-voltage region in the air, avoid static direct electronic components from PCB on to flow through, thereby protection electronic components is not damaged by static, improves PCB's self electrostatic protection ability.

In an embodiment, a switching power supply is provided, the switching power supply includes a PCB embedded in the switching power supply, the PCB is an octagonal structure, a groove 15 with a preset width and length is further disposed in a high voltage region 1 of the PCB, and the groove 15 is used for fixing the PCB, so that the PCB can be in a stable and non-wobbling state.

Alternatively, the PCB may have any other shape, and the recess 15 may be disposed in the low voltage region 2, which can achieve the above-mentioned effects.

In this embodiment, the PCB is a double-layer board including a front-side circuit board and a back-side circuit board, as shown in fig. 3, for the front-side circuit board structure of the PCB provided in this embodiment, the front-side circuit board is provided with a first discharge structure 11 and a second discharge structure 21, wherein structures and positions of the first discharge structure 11 and the second discharge structure 21 are the same as those of the first discharge structure 11 and the second discharge structure 21 in fig. 2; the front circuit board is also provided with a bridge rectifier 12, a main control chip 25, an optocoupler module 24 and a synchronous rectifier chip 23; the bridge stack 12 is disposed in the high-voltage region 1 of the front circuit board, and the main control chip 25, the optocoupler module 24 and the synchronous rectification chip 23 are disposed in the low-voltage region 2 of the front circuit board.

As shown in fig. 4, which is a rear circuit board structure of the PCB, the rear circuit board is provided with a transformer 26, a first capacitor 13, a second capacitor 14, a third capacitor 22, a fuse 16, an inductor 17 and a power terminal 18; wherein, the first capacitor 13, the second capacitor 14, the fuse 16 and the power terminal 18 are arranged in the high-voltage area 1 of the back circuit board; the transformer 26 and the third capacitor 22 are arranged in the low-voltage area 2 of the back side circuit board.

The high-voltage alternating-current electronic component is arranged in the high-voltage area 1 of the PCB, the low-voltage electronic component is arranged in the low-voltage area 2 of the PCB, so that the electronic component in the high-voltage area 1 and the electronic component in the low-voltage area 2 keep a certain distance, and the influence of the electronic component in the high-voltage area 1 on the electronic component in the low-voltage area in the working process can be effectively reduced.

In this embodiment, the input terminal of the bridge stack 12 is used for inputting an external power source, the output terminal of the bridge stack 12 is connected to the input terminal of the transformer 26, and the output terminal of the transformer 26 is used for outputting a load voltage.

The connection relation of the components is as follows:

the input end of the optical coupling module 24 is connected with the output end of the transformer 26, and the output end of the optical coupling module 24 is connected with the input end of the main control chip 25, so that the voltage output by the transformer 26 is collected, and when the collected low voltage meets the preset condition, a control signal is provided for the main control chip 25.

The input end of the synchronous rectification chip 23 is connected to the output end of the transformer 26, and the output end of the synchronous rectification chip 23 is used for outputting the rectified load voltage.

One end of the inductor 17 is connected with the output end of the bridge stack 12, and the other end is connected with the input end of the transformer 26; the first capacitor 13 and the second capacitor 14 are filter capacitors of the high-voltage region 1, one end of the first capacitor 13 is connected with one end of an inductor 17, the other end of the first capacitor 13 is grounded, one end of the second capacitor 14 is connected with the other end of the inductor 17, and the other end of the second capacitor 14 is grounded; the first capacitor 13, the second capacitor 14 and the inductor 17 form a filter circuit, which can effectively filter out clutter signals output by the bridge stack 12.

The third capacitor 22 is a filter capacitor of the low voltage region 2, and is connected in parallel with the output terminal of the transformer 26 to filter the noise signal output by the transformer 26, so as to keep the output load voltage stable.

In this embodiment, the switching power supply further includes a housing, as shown in fig. 5, the housing is a structure of a cube and is made of an insulating flame-retardant material, a PCB of the switching power supply can be assembled into the housing, wherein a fixing baffle 3 is disposed in the housing, and the fixing baffle 3 corresponds to a groove 15 on the PCB, so that the PCB can be stably installed in the housing; the shell is also provided with a circular threading hole 4 for threading, and a power line on the PCB is led out through the threading hole 4.

In the switching power supply of the embodiment, the bridge rectifier 12 converts an external alternating voltage into a direct voltage, the transformer converts the direct voltage into a stable load voltage, in the process, the main control chip 25 adjusts the voltage input by the transformer 26 according to the control signal output by the optocoupler module 24, and the synchronous rectification chip 23 rectifies the voltage output by the transformer 26 to make the load voltage in a stable state; in this process, if static electricity is generated in the high voltage region 1 or the low voltage region 2, the first discharge structure 11 and the second discharge structure 21 discharge the static electricity of the region with higher electrostatic potential through the air medium.

The switching power supply of the embodiment has the following characteristics:

(1) The static electricity of PCB high-voltage area and low-voltage area is released in the air through the point of discharge of the structure of discharging that sets up on the PCB, avoids static electricity direct electronic components from the PCB to flow through to protect electronic components not damaged by static, improve PCB self static protective capability.

(2) The electronic components in the high-voltage area and the electronic components in the low-voltage area are arranged in a partitioning mode, so that the electronic components in the high-voltage area and the electronic components in the low-voltage area keep a certain distance, and the influence of the electronic components in the high-voltage area on the electronic components in the low-voltage area in the working process is effectively reduced.

(3) The main control chip and the synchronous rectification chip are arranged, so that the switching power supply can stably output load voltage.

In an embodiment, a PCB structure of a switching power supply is provided, and the structure, the arrangement of components, and the effect of the PCB structure of the switching power supply are completely the same as those of the PCB in the above embodiments, and are not described herein again.

The PCB structure of fig. 1 or fig. 2 can be applied to not only a switching power supply circuit, but also other circuit boards generating static electricity, for example, a frequency conversion adjusting circuit with a high operating frequency can generate static electricity during operation, and the PCB structure of this embodiment can release static electricity in the circuit, thereby protecting electronic components.

The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A switching power supply, comprising:

2. The switching power supply according to claim 1, wherein the first discharge structure includes a first discharge portion and a second discharge portion, one end of the first discharge portion and one end of the second discharge portion are connected to form an L shape, and the other end of the second discharge portion is provided with the first discharge tip.

3. The switching power supply according to claim 2, wherein the second discharge structure has a trapezoid shape, and a bottom side of the trapezoid shape of the second discharge structure is provided with the second discharge tip.

4. The switching power supply of claim 3, wherein the first discharge tip and the second discharge tip are spaced apart by a predetermined distance.

5. The switching power supply according to claim 1, wherein a recess is provided in the high voltage region or the low voltage region of the PCB.

6. The switching power supply of claim 1, wherein the PCB comprises a front side circuit board and a back side circuit board;

7. The switching power supply according to claim 6, wherein the rear surface circuit board is provided with a transformer, a first capacitor, a second capacitor, a third capacitor, a fuse, an inductor, and a power supply terminal;

8. The switching power supply according to claim 1, further comprising: a housing, the PCB disposed within the housing.

9. The switching power supply according to claim 8, wherein the housing has a square structure, and a baffle for fixing the PCB is disposed inside the housing.

10. The switching power supply according to claim 9, wherein either side of the case is provided with a circular threading hole.