Paster plug-in integrated modular power supply circuit board
The modular power circuit board addresses heat accumulation and assembly challenges by separating heat-generating and low-heat components, ensuring efficient heat dissipation and ease of maintenance, enhancing the power module's performance and longevity.
Patent Information
- Application Number
- CN202421007091.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-10
AI Technical Summary
Existing power modules with combined aluminum and copper substrates for heat dissipation face issues with extensive circuit layout, leading to heat accumulation and difficulty in assembly and maintenance due to densely packed components, affecting service life.
A modular power circuit board design with copper-based circuit boards for low-heat components and aluminum-based circuit boards for high-heat components, using screw connections and thermally conductive silicon layers for efficient heat dissipation, along with a dual transformer design for reduced thickness.
The design achieves efficient heat dissipation, reduced volume, and improved assembly and maintenance, extending the service life and stability of the power module.
Smart Images
Figure CN222263134U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power circuit boards, in particular to a patch plug-in integrated module power circuit board. Background Art
[0002] The power module is a power supply directly mounted on the printed circuit board to power application-specific integrated circuits (ASICs), digital signal processors (DSPs), microprocessors, memories, field programmable gate arrays (FPGAs) and other digital or analog loads. The power module has an isolation function, strong anti-interference ability, built-in protection function, and is easy to integrate. At present, power modules are widely used in the fields of communications, automotive electronics technology, and aerospace technology. Switching power supplies can be divided into two categories: AC / DC and DC / DC.
[0003] In order to improve the product performance of power modules, such as improving power conversion efficiency, improving durability and reducing occupied volume, various power modules with improved directions have appeared on the market. For example, the patent document with patent number CN201821100211.2 and titled "An AC-DC Power Module" discloses a power module solution including a housing, an aluminum substrate, and a PCB board. The housing is a frame structure open from top to bottom, the aluminum substrate is provided with power devices and several magnetic parts, the PCB board is provided with several electronic components, the aluminum substrate is fixedly mounted on the bottom of the housing, and the PCB board is fixedly mounted on the aluminum substrate. The power module solution adopts a combination of an aluminum substrate and a copper substrate to improve the heat dissipation capacity of the power module itself, and eliminates heat dissipation components such as a heat dissipation fan to reduce the size of the device.
[0004] However, the above scheme does not plan the circuit layout of electronic components in an orderly manner. Various components are stacked or even stacked up and down in a relatively crowded space, which makes assembly and disassembly maintenance difficult. The heat generated by the operation of electronic components is easy to accumulate in places where the components are densely packed, affecting the service life of the product. Therefore, there is still a lot of room for improvement in the overall layout of the power module. Utility Model Content
[0005] In order to solve the problem that although there are small-volume power module solutions without heat dissipation devices combining aluminum substrates and copper substrates on the market, the circuit layout of electronic components is relatively extensive, and the heating components are often installed in a relatively crowded space, resulting in heat accumulation, which has a negative impact on the service life of the power module, a patch plug-in integrated modular power circuit board is provided.
[0006] The patch plug-in integrated modular power supply circuit board includes an EMC circuit, an AC / DC rectifier circuit, a transformer circuit, a DC output rectifier circuit and a DC output filter circuit which are electrically connected in sequence, wherein the EMC circuit is arranged on a first double-sided copper-based circuit board, the EMC circuit is electrically connected to a mains interface, the DC output filter circuit is arranged on a second double-sided copper-based circuit board, the DC output filter circuit is electrically connected to a load interface, and the first double-sided copper-based circuit board, the AC / DC rectifier circuit, the transformer circuit, the DC output rectifier circuit and the second double-sided copper-based circuit board are arranged in sequence on an aluminum-based circuit board.
[0007] Furthermore, the bottoms of the first double-sided copper-based circuit board and the second double-sided copper-based circuit board are both detachably connected to the aluminum-based circuit board via screw columns.
[0008] Furthermore, a thermally conductive silicon sheet layer is provided between the first double-sided copper-based circuit board and the second double-sided copper-based circuit board and the aluminum circuit substrate.
[0009] Furthermore, the EMC circuit is connected to the AC-DC rectifier circuit via a first pin connection, and the DC output rectifier circuit is connected to the DC output filter circuit via a second pin connection.
[0010] Furthermore, the AC / DC rectifier circuit and the transformer circuit are electrically connected in sequence to a PFC control circuit and a power supply control circuit which are arranged on the aluminum-based circuit board.
[0011] Furthermore, the PFC control circuit includes a PWM chip, the power control circuit includes a power management chip, the PWM chip and the power management chip are both arranged on a third double-sided copper-based circuit board, and the third double-sided copper-based circuit board is connected to the aluminum-based circuit board through a third pin connection.
[0012] Furthermore, the power control circuit is electrically connected to a feedback circuit, and the feedback circuit is electrically connected to a DC output filter circuit.
[0013] Furthermore, the feedback circuit is arranged on the second double-sided copper-based circuit board, and the feedback circuit is connected to the power management chip through the fourth pin connection.
[0014] Furthermore, the bottom of the aluminum-based circuit board is mounted on the bottom of the inner side of the heat dissipation housing, and the third double-sided copper-based circuit board is vertically mounted on the inner side of the heat dissipation housing.
[0015] Furthermore, the transformer circuit includes two small transformers with primary terminals connected in series and secondary terminals connected in parallel.
[0016] The advantages of the utility model are:
[0017] 1. The circuit with low heat generation is integrated on the double-sided copper-based circuit board, and the circuit with high heat generation is set on the aluminum-based circuit board. The double-sided copper-based circuit board is attached to the surface of the aluminum-based circuit board without circuit components, which has strong heat dissipation performance.
[0018] 2. The power circuit structure is flat, occupies a small volume, and can be installed in a relatively narrow space.
[0019] 3. The modules are clearly divided, making assembly and maintenance easier.
[0020] 4. The dual transformer design can further reduce the thickness of the power supply hardware and achieve small size and high power supply. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 A schematic diagram of the structure of a modular power supply circuit board integrated with a SMD plug-in;
[0023] Figure 2 The side structure diagram of the modular power supply circuit board integrated with the SMD plug-in;
[0024] Figure 3 Circuit schematic diagram for SMD plug-in integrated modular power supply circuit board.
[0025] Figure ID:
[0026] 1. EMC circuit; 2. AC / DC rectifier circuit; 3. PFC control circuit; 31. PWM chip; 4. Power supply control circuit; 41. Power management chip; 5. Transformer circuit; 6. DC output rectifier circuit; 7. DC output filter circuit; 8. AC power interface; 9. Load interface; 10. Aluminum-based circuit board; 101. First double-sided copper-based circuit board; 102. Second double-sided copper-based circuit board; 103. Third double-sided copper-based circuit board; 11. Screw column; 12. Thermal conductive silicon layer; 13. Feedback circuit; 21. First pin wiring; 22. Second pin wiring; 23. Third pin wiring; 24. Fourth pin wiring. DETAILED DESCRIPTION
[0027] In order to solve the problem that although there are small-volume power module solutions without heat dissipation devices combining aluminum substrates and copper substrates on the market, the circuit layout of electronic components is relatively extensive, and the heating components are often installed in a relatively crowded space, resulting in heat accumulation, which has a negative impact on the service life of the power module, a patch plug-in integrated modular power circuit board is provided.
[0028] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] It should be noted that the terms such as "within", "in" and "a" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of the implementation of the present utility model, and should be stated in advance.
[0030] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.
[0031] like Figures 1 to 3As shown, this embodiment provides a patch plug-in integrated modular power supply circuit board, including an EMC circuit 1, an AC-DC rectifier circuit 2, a transformer circuit 5, a DC output rectifier circuit 6 and a DC output filter circuit 7 electrically connected in sequence, the EMC circuit 1 is arranged on a first double-sided copper-based circuit board 101, the EMC circuit 1 is electrically connected to a mains interface 8, the DC output filter circuit 7 is arranged on a second double-sided copper-based circuit board 102, the DC output filter circuit 7 is electrically connected to a load interface 9, and the first double-sided copper-based circuit board 101, the AC-DC rectifier circuit 2, the transformer circuit 5, the DC output rectifier circuit 6, and the second double-sided copper-based circuit board 102 are arranged on an aluminum-based circuit board 10 in sequence.
[0032] The power circuit board solution of this embodiment can convert AC mains into low-voltage DC power for use by DC loads such as computers and LED lights. The heat dissipation components are eliminated, and a large area of metal aluminum-based circuit board is used to directly dissipate heat. A double-sided copper-based circuit board is used to integrate electronic component circuits with low heat generation. While ensuring the heat dissipation effect, the solution has a small size, no operating noise, and a long service life.
[0033] The bottoms of the first double-sided copper-based circuit board 101 and the second double-sided copper-based circuit board 102 are detachably connected to the aluminum-based circuit board 10 via screw columns 11. The screw connection is convenient to assemble and disassemble and has low cost.
[0034] A thermally conductive silicon layer 12 is disposed between the first double-sided copper-based circuit board 101 and the second double-sided copper-based circuit board 102 and the aluminum circuit substrate 10. The thermally conductive silicon layer 12 can effectively improve the thermal conductivity between the double-sided copper-based circuit board and the aluminum-based circuit board, and ensure the heat dissipation effect.
[0035] The EMC circuit 1 is connected to the AC / DC rectifier circuit 2 via a first pin connection 21, and the DC output rectifier circuit 6 is connected to the DC output filter circuit 7 via a second pin connection 22. Pin connection is a common connection method for circuit boards, which can reduce the internal resistance of the circuit between copper-based and aluminum-based circuit boards and ensure stable connection.
[0036] The AC / DC rectifier circuit 2 and the transformer circuit 5 are electrically connected in sequence with a PFC control circuit 3 and a power control circuit 4 arranged on an aluminum-based circuit board 10. The PFC circuit can not only improve the quality of power supply, but also reduce interference to other electronic devices and improve the stability of the entire power system. The power control circuit 4 is used to manage and control various aspects of the power system. It can monitor, adjust and protect the power supply voltage, current and power to ensure the normal operation and optimal performance of the electronic equipment, while also saving energy and extending battery life.
[0037] The PFC control circuit 3 includes a PWM chip 31 (such as NCP1653), and the power control circuit 4 includes a power management chip 41 (such as L6599). The PWM chip 31 and the power management chip 41 are both arranged on the third double-sided copper-based circuit board 103, and the third double-sided copper-based circuit board 103 is connected to the aluminum-based circuit board 10 through the third pin connection 23. Since the PWM chip 31 and the power management chip 41 are relatively precise and generate less heat, arranging them on another double-sided copper-based circuit board can prevent them from being exposed to higher heat, thereby improving the circuit operation stability and service life.
[0038] The power control circuit 4 is electrically connected to a feedback circuit 13, and the feedback circuit 13 is electrically connected to a DC output filter circuit 7. The feedback circuit 13 is disposed on the second double-sided copper-based circuit board 102, and the feedback circuit 13 is connected to the power management chip 41 via a fourth pin connection 24. The integration of the feedback circuit 13 and the DC output filter circuit 7 on the second double-sided copper-based circuit board 102 helps to reduce the occupied volume of the circuit board and facilitates maintenance and replacement.
[0039] The bottom of the aluminum-based circuit board 10 is mounted on the bottom of the inner side of the heat dissipation housing (not shown in the figure), and the third double-sided copper-based circuit board 103 is vertically mounted on the inner side of the heat dissipation housing. Since there is no extra space on the aluminum-based circuit board 10, the third double-sided copper-based circuit board 103 with a smaller heat generation is directly mounted on the inner side of the heat dissipation housing, which is generally made of metal, to ensure the heat dissipation effect and avoid the accumulation of electronic components in a small space, resulting in reduced heat dissipation efficiency.
[0040] The transformer circuit 5 includes two small transformers with primary connected in series and secondary connected in parallel. The transformers are set as two small transformers with small size and low height, which can achieve small size and high power output, so as to further reduce the thickness of the power supply circuit board and strengthen the advantages of the solution of this embodiment.
[0041] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementation modes. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.
Claims
1. The SMD plug-in integrated modular power supply circuit board is characterized by: It includes an EMC circuit, an AC / DC rectifier circuit, a transformer circuit, a DC output rectifier circuit and a DC output filter circuit which are electrically connected in sequence. The EMC circuit is arranged on a first double-sided copper-based circuit board, the EMC circuit is electrically connected to a mains interface, the DC output filter circuit is arranged on a second double-sided copper-based circuit board, the DC output filter circuit is electrically connected to a load interface, and the first double-sided copper-based circuit board, the AC / DC rectifier circuit, the transformer circuit, the DC output rectifier circuit and the second double-sided copper-based circuit board are arranged on an aluminum-based circuit board in sequence.
2. The SMD integrated modular power supply circuit board according to claim 1, characterized in that: The bottoms of the first double-sided copper-based circuit board and the second double-sided copper-based circuit board are both detachably connected to the aluminum-based circuit board via screw columns.
3. The SMD integrated modular power supply circuit board according to claim 2, characterized in that: A thermally conductive silicon sheet layer is disposed between the first double-sided copper-based circuit board and the second double-sided copper-based circuit board and the aluminum circuit substrate.
4. The SMD integrated modular power supply circuit board according to claim 1, characterized in that: The EMC circuit is connected to the AC-DC rectifier circuit via a first pin connection, and the DC output rectifier circuit is connected to the DC output filter circuit via a second pin connection.
5. The SMD integrated modular power supply circuit board according to claim 1, characterized in that: The AC / DC rectifier circuit and the transformer circuit are electrically connected in sequence to a PFC control circuit and a power supply control circuit arranged on an aluminum-based circuit board.
6. The SMD integrated modular power supply circuit board according to claim 5, characterized in that: The PFC control circuit includes a PWM chip, and the power control circuit includes a power management chip. The PWM chip and the power management chip are both arranged on a third double-sided copper-based circuit board, and the third double-sided copper-based circuit board is connected to the aluminum-based circuit board through a third pin connection.
7. The SMD integrated modular power supply circuit board according to claim 6, characterized in that: The power control circuit is electrically connected to a feedback circuit, and the feedback circuit is electrically connected to a DC output filter circuit.
8. The SMD integrated modular power supply circuit board according to claim 7, characterized in that: The feedback circuit is arranged on the second double-sided copper-based circuit board, and the feedback circuit is connected to the power management chip via the fourth pin connection.
9. The SMD integrated modular power supply circuit board according to claim 6, characterized in that: The bottom of the aluminum-based circuit board is mounted on the bottom of the inner side of the heat dissipation shell, and the third double-sided copper-based circuit board is vertically mounted on the inner side of the heat dissipation shell.
10. The SMD integrated modular power supply circuit board according to claim 1, characterized in that: The transformer circuit comprises two small transformers with primary terminals connected in series and secondary terminals connected in parallel.