Inductor assembly and switching power supply

Abstract

The embodiment of the utility model discloses an inductor assembly and a switching power supply. The inductor component comprises a winding body; a metal powder compression molding block body, wherein the metal powder compression molding block body wraps the winding body; a groove is formed in the bottom face, facing a printed circuit board, of the metal powder compression molding block, and the groove is suitable for containing electronic components arranged on the printed circuit board. The groove is formed in the metal powder compression molding block, the space suitable for containing electronic components on the printed circuit board is provided, and plane space resources on the printed circuit board are fully utilized.

Description

Technical Field

[0001] The utility model relates to the field of electronic equipment, and more specifically, to an inductor component and a switching power supply. Background Art

[0002] Inductor, also known as choke, reactor, dynamic reactor, is a magnetic electronic component that can convert electrical energy into magnetic energy and store it. It is usually referred to as inductor.

[0003] Inductors are important components of many electronic devices such as switching power supply circuits and power blocks. How to reasonably design inductors and how to reasonably layout inductors on printed circuit boards (PCBs) with limited space to improve space utilization is the focus of the industry. Utility Model Content

[0004] The utility model provides an inductor component and a switching power supply, which are helpful to improve the space utilization rate of the printed circuit board.

[0005] The technical solution of the utility model implementation is as follows:

[0006] An inductor component, comprising:

[0007] Winding body;

[0008] A block formed by pressing metal powder, wherein the block is formed by pressing metal powder and wraps the winding body;

[0009] The bottom surface of the metal powder pressed block facing the printed circuit board is provided with a groove, and the groove is suitable for accommodating electronic components arranged on the printed circuit board.

[0010] In one embodiment, the winding body includes a winding coil, a first pin coupled to a first end of the winding coil, and a second pin coupled to a second end of the winding coil;

[0011] The first pin comprises a first bent structure extending outward through a first side wall of the metal powder pressed block;

[0012] The second pin includes a second bending structure extending outward through the opposite side wall of the first side wall;

[0013] The first bending structure and the second bending structure are coupled to the printed circuit board.

[0014] In one embodiment, the groove is between the first bending structure and the second bending structure.

[0015] In one embodiment, the groove is located on opposite sides of the first bending structure and the second bending structure.

[0016] In one embodiment, the groove is between the first bending structure and the second bending structure and on two opposite sides of the first bending structure and the second bending structure.

[0017] A switching power supply, comprising:

[0018] A printed circuit board, comprising a first layer and a second layer;

[0019] A power switch, arranged on the first layer;

[0020] A controller, arranged on the second layer;

[0021] Peripheral control devices are arranged on the second layer;

[0022] An inductor component is arranged on the second layer;

[0023] The inductor assembly comprises: a winding body; a metal powder pressed block, wherein the metal powder pressed block wraps the winding body; wherein the bottom surface of the metal powder pressed block facing the second layer has a groove, wherein the groove is suitable for accommodating the peripheral control device.

[0024] In one embodiment, the winding body includes a winding coil, a first pin coupled to a first end of the winding coil, and a second pin coupled to a second end of the winding coil;

[0025] The first pin comprises a first bent structure extending outward through a first side wall of the metal powder pressed block;

[0026] The second pin includes a second bending structure extending outward through the opposite side wall of the first side wall;

[0027] The first bending structure and the second bending structure are coupled to the second layer.

[0028] In one embodiment, the groove is between the first bending structure and the second bending structure.

[0029] In one embodiment, the groove is located on opposite sides of the first bending structure and the second bending structure.

[0030] In one embodiment, the groove is between the first bending structure and the second bending structure and on two opposite sides of the first bending structure and the second bending structure.

[0031] In one embodiment, the peripheral control device includes at least one of the following:

[0032] Resistance; capacitance.

[0033] In one embodiment, the first layer is a top layer and the second layer is a bottom layer.

[0034] It can be seen from the above technical solution that the inductor assembly includes: a winding body; a metal powder pressed block, the metal powder pressed block wrapping the winding body; wherein the metal powder pressed block has a groove on the bottom surface facing the printed circuit board, and the groove is suitable for accommodating electronic components arranged on the printed circuit board. It can be seen that by grooving the metal powder pressed block, a space suitable for accommodating electronic components on the printed circuit board is provided, which fully utilizes the space resources on the board and improves the space utilization rate on the board.

[0035] Moreover, there are multiple implementation methods for the slotting of the metal powder pressed block, which improves applicability. In addition, a switching power supply that can improve energy density is provided, which is suitable for various power supply scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 FIG. 1 is a schematic diagram of an inductor arranged on a printed circuit board in the related art.

[0037] Figure 2A It is a first structural diagram of an inductor component according to an embodiment of the utility model.

[0038] Figure 2B This is a first schematic diagram of the slotting position according to an embodiment of the present utility model.

[0039] Figure 3A It is a second structural diagram of the inductor component according to the embodiment of the utility model.

[0040] Figure 3B This is a second schematic diagram of the slotting position according to an embodiment of the present utility model.

[0041] Figure 3C This is a third schematic diagram of the slotting position according to an embodiment of the present utility model.

[0042] Figure 4 It is an exemplary comparison diagram of the arrangement of the switching power supply of the related art and the switching power supply of the embodiment of the utility model.

[0043] Figure 5A The figure is a structural diagram of a dual-circuit switching power supply arranged on a printed circuit board according to an embodiment of the utility model.

[0044] Figure 5BThe figure is a schematic diagram of the pin positions of the integrated inductor in the dual-way switching power supply according to the embodiment of the utility model. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model is further described in detail below with reference to the accompanying drawings.

[0046] For the sake of brevity and intuitiveness in description, the scheme of the utility model is explained below by describing several representative implementations. A large number of details in the implementation methods are only used to help understand the scheme of the utility model. However, it is obvious that the technical scheme of the utility model may not be limited to these details when implemented. In order to avoid unnecessary descriptions that blur the scheme of the utility model, some implementation methods are not described in detail, but only a framework is given. In the following, "including" means "including but not limited to", and "according to..." means "at least according to..., but not limited to only according to...". Due to the language habits of Chinese, when the number of a component is not specifically specified below, it means that the component can be one or more, or can be understood as at least one.

[0047] Figure 1 Schematic diagram of an inductor arranged on a printed circuit board in the related art. The inductor 10 includes a metal powder pressed block 11 and a winding body 12, wherein the metal powder pressed block 11 wraps the winding body 12. The winding body 12 includes a winding coil 17, a first pin 18 and a second pin 19. The first pin 18 is coupled to a first end of the winding coil 17. The second pin 19 is coupled to a second end of the winding coil 17. The first pin 18 includes a first bending structure 13 that passes through the metal powder pressed block 11 and is coupled to the printed circuit board 20. The second pin 19 includes a second bending structure 14 that passes through the metal powder pressed block 11 and is coupled to the printed circuit board 20.

[0048] The overall shape of the metal powder pressed block 11 is a cuboid or a cube. The thickness of the first bending structure 13 and the second bending structure 14 is small, and the space between the inductor 10 and the printed circuit board 20 is limited, or is actually in a fitted state. Therefore, it is difficult to arrange other electronic devices in the space between the inductor 10 and the printed circuit board 20.

[0049] When it is necessary to arrange other electronic components on the printed circuit board 20, it is necessary to find an empty plane position on the printed circuit board 20 that is not occupied by the inductor 10. Figure 1 As shown, resistors 15, capacitors 16 and other electronic components are further arranged at the vacant plane positions on the printed circuit board 20 that are not occupied by the inductor 10.

[0050] In this arrangement, the inductor 10 occupies a large plane space of the printed circuit board 20, limiting the space for placing other electronic devices on the printed circuit board 20. For example, in the application of switching power supplies, it is necessary to arrange many peripheral control devices (such as resistors, capacitors, etc.) in the limited plane space not occupied by the inductor 10, resulting in a large space occupied by a single switching power supply on the printed circuit board, limiting the number of switching power supplies installed on boards such as power cards.

[0051] The winding coil inside the inductor assembly is mainly in the center, and the magnetic flux is also mainly gathered in the center. The magnetic flux of the outer part of the metal powder pressed block that wraps the winding coil is relatively small, and the magnetic flux leaking into the air is even more disproportionately small. Therefore, if the volume of the metal powder pressed block is reduced or its shape is changed (for example, a groove is provided at the bottom), it will not have a significant impact on the normal operation of the inductor assembly. On the contrary, it can provide accommodation space for electronic components arranged on the printed circuit board, which is conducive to the arrangement of more electronic components.

[0052] In the embodiment of the utility model, considering the defect that the metal powder pressed block in the related art with the overall shape of a cuboid or a cube occupies a large space and it is difficult to arrange other electronic devices on the printed circuit board with limited space resources, a groove is set on the bottom surface of the metal powder pressed block, and the electronic components arranged on the printed circuit board can be accommodated in the space defined by the groove and the printed circuit board, thereby saving the planar space resources on the board, and being suitable for a variety of application scenarios of inductor components. For example, it can be applied to switching power supplies in power supply environments with small space and high power consumption, filter inductor applications at the input end, etc.

[0053] The above disclosure details the technical defects existing in the prior art, the causes of the technical defects, and the thinking and analysis process of overcoming the technical defects. In fact, the cognition of the above technical defects is not common knowledge in the field, but a novel discovery made by the inventor in his research. In addition, the tracing of the causes of the technical defects and the thinking and analysis process of overcoming the technical defects are also the gradual analysis results of the inventor in the actual research process, and are not common knowledge in the field.

[0054] Figure 2A It is a first structural diagram of an inductor component according to an embodiment of the utility model. Figure 2B This is a first schematic diagram of the slotting position according to an embodiment of the present utility model.

[0055] like Figure 2A As shown, the inductor component 30 includes: a winding body 32 and a metal powder pressed block 31 wrapping the winding body 32 .

[0056] The metal powder pressed block 31 has a groove 35 on its bottom surface facing the printed circuit board 20. The groove 35 accommodates the electronic components arranged on the printed circuit board 20. Figure 2A As shown, electronic components such as a resistor 36 and a capacitor 37 arranged on the printed circuit board 20 can be accommodated in the groove 35 .

[0057] The winding body 32 includes a winding coil 40, a first pin 38 coupled to a first end of the winding coil 40, and a second pin 39 coupled to a second end of the winding coil 40. The first pin 38 includes a first bent structure 33 extending outward through a first side wall of the metal powder pressed block 31. The second pin 39 includes a second bent structure 34 extending outward through a side wall opposite to the first side wall.

[0058] The first bending structure 33 and the second bending structure 34 are respectively coupled to the printed circuit board 20 , so as to jointly receive the metal powder pressed block 31 on the printed circuit board 20 .

[0059] Depend on Figure 2B It can be seen that the groove 35 is arranged between the first bending structure 33 and the second bending structure 34. Figure 2A and Figure 2B In the embodiment, the length, width and depth of the groove 35 are all variable.

[0060] Figure 3A It is a second structural diagram of the inductor component according to the embodiment of the utility model. Figure 3B This is a second schematic diagram of the slotting position according to an embodiment of the present utility model.

[0061] like Figure 3A As shown, the inductor component 30 includes: a winding body 32 and a metal powder pressed block 31 wrapping the winding body 32 .

[0062] The metal powder pressed block 31 has a first groove 42 and a second groove 43 on its bottom surface facing the printed circuit board 20. The first groove 42 and the second groove 43 can both accommodate electronic components on the printed circuit board 20. For example: Figure 3A As shown, the resistor 36 arranged on the printed circuit board 20 is accommodated in the first groove 42 , and the capacitor 37 arranged on the printed circuit board 20 is accommodated in the second groove 43 .

[0063] The winding body 32 includes a winding coil, a first pin coupled to a first end of the winding coil, and a second pin coupled to a second end of the winding coil. The first pin includes a first bending structure 33 extending outward through a first side wall of the metal powder pressed block 31. The second pin includes a second bending structure 34 extending outward through a side wall opposite to the first side wall. Figure 3AThe second bending structure is not shown in the figure, and the second bending structure is actually opposite to the first bending structure 33).

[0064] The first bending structure 33 and the second bending structure 34 are respectively coupled to the printed circuit board 20 , so as to jointly receive the metal powder pressed block 31 on the printed circuit board 20 .

[0065] Depend on Figure 3A and Figure 3B It can be seen that the first groove 42 and the second groove 43 are arranged on opposite sides of the first bending structure 33 and the second bending structure 34. The length, width and depth of the first groove 42 and the second groove 43 are all variable.

[0066] exist Figure 2A to Figure 2B as well as Figure 3A to Figure 3B In the figure, various types of slot positions are shown as examples. In fact, the slot positions of the embodiment of the utility model can also have other forms. For example, the bottom surface of the metal powder pressed block can be hollowed out, leaving only two bending structures coupled to the printed circuit board.

[0067] Figure 3C FIG. 3 is a third schematic diagram of the slotting position according to an embodiment of the present utility model. Figure 3C In the embodiment, the bottom surface of the metal powder pressed block 31 is substantially hollowed out to form a groove 44, leaving only two bending structures coupled to the printed circuit board, namely the first bending structure 33 and the second bending structure 34. Moreover, the groove 44 has a structure similar to an "I" shape. The groove 44 is located between the first bending structure 33 and the second bending structure 34 and on opposite sides of the first bending structure 33 and the second bending structure 34.

[0068] Typical examples of slot positions are described above by way of example. Those skilled in the art may appreciate that such description is merely exemplary and is not intended to limit the protection scope of the embodiments of the present utility model.

[0069] The inductor component of the embodiment of the utility model can be applied to a variety of electronic devices. For example, it can be applied to a switching power supply including an inductor component. When the inductor component of the embodiment of the utility model is applied to a switching power supply, it is particularly suitable for a power supply environment with small space and high power consumption. For example, it can be applied to a switching power supply that powers devices such as a processor core, a memory, and a high-speed serial computer expansion bus (PCIE), etc. Among them, the processor may include a central processing unit (CPU), a graphics processing unit (GPU), a general-purpose computing on graphics processing unit (GPGPU) or a microcontroller unit (MCU), etc.

[0070] The embodiment of the utility model also proposes a switching power supply arrangement method. The switching power supply includes: a printed circuit board, including a first layer and a second layer; a power switch, arranged on the first layer; a controller, arranged on the second layer; a peripheral control device, arranged on the second layer; an inductor component, arranged on the second layer; the inductor component includes: a winding body; a metal powder pressed block, the metal powder pressed block wraps the winding body; wherein the bottom surface of the metal powder pressed block facing the second layer has a groove, and the groove is suitable for accommodating the peripheral control device. In one embodiment, the first layer is the top layer, and the second layer is the bottom layer.

[0071] The peripheral control device can be implemented as an electronic device in the peripheral circuit of the controller. For example, the peripheral control device can be implemented as: an input voltage filter capacitor of the controller; a mode selection resistor of the controller; a pull-up resistor of the enable signal of the controller, etc.

[0072] In one embodiment, the winding body includes a winding coil, a first pin coupled to the first end of the winding coil, and a second pin coupled to the second end of the winding coil; the first pin includes a first bending structure extending outward through the first side wall of the metal powder pressed block; the second pin includes a second bending structure extending outward through the opposite side wall of the first side wall; the first bending structure and the second bending structure are coupled to the second layer.

[0073] In one embodiment, the groove is between the first bending structure and the second bending structure. In another embodiment, the groove is on opposite sides of the first bending structure and the second bending structure. In another embodiment, the groove is between the first bending structure and the second bending structure and on opposite sides of the first bending structure and the second bending structure. The length, width and depth of the groove are all variable.

[0074] Figure 4 It is an exemplary comparison diagram of the arrangement of the switching power supply of the related art and the switching power supply of the embodiment of the utility model.

[0075] Figure 4 The left half of the figure is the layout structure of the switching power supply on the printed circuit board of the related art, in which the inductor component and multiple control devices are arranged in a plane on the printed circuit board. The control device may include a controller, multiple resistors (R1~R7) and multiple capacitors (C1~C4). It can be seen that the inductor component occupies a large plane space on the printed circuit board, and the control device can only be arranged in an idle plane position not occupied by the inductor component, resulting in more plane positions on the printed circuit board being occupied, affecting the arrangement of more switching power supply components and other electronic components, and limiting the overall energy density of the board.

[0076] Figure 4 The right half of is the layout structure of the switching power supply according to the utility model on the printed circuit board, wherein part of the control components are accommodated in the space defined by the groove and the printed circuit board. For example, the resistor R1, the resistor R2, the resistor R3, the resistor R5, the resistor R7, the capacitor C2 and the capacitor C4 are all arranged in the space defined by the groove and the printed circuit board. Therefore, the space resources on the printed circuit board are fully utilized.

[0077] The switching power supply proposed in the embodiment of the utility model can be applied in various application environments. For example, a dual-circuit switching power supply or a switching power supply with more circuits can be arranged on a printed circuit board, and the embodiment of the utility model has no limitation on this.

[0078] Figure 5A The figure is a structural diagram of a dual-circuit switching power supply arranged on a printed circuit board according to an embodiment of the utility model. Figure 5B The figure is a schematic diagram of the pin positions of the integrated inductor in the dual-way switching power supply according to the embodiment of the utility model.

[0079] like Figure 5A As shown, the dual-way switching power supply includes: a printed circuit board 20, including a top layer 51 and a bottom layer 52; a first power switch 53 and a second power switch 54, arranged on the top layer 51; a controller 55, arranged on the bottom layer 52; a first peripheral control device 36 and a second peripheral control device 37, arranged on the bottom layer 52; and an inductor assembly 30, arranged on the bottom layer 52. The inductor assembly 30 includes: a first winding body 32a and a second winding body 32b; a metal powder pressed block 31, the metal powder pressed block 31 wraps the first winding body 32a and the second winding body 32b; wherein the bottom surface of the metal powder pressed block 31 facing the bottom layer 52 has a groove 35.

[0080] The first winding body 32a includes a first winding coil 40a, a first pin coupled to a first end of the first winding coil 40a, and a second pin coupled to a second end of the first winding coil 40a. The first pin includes a first bending structure 33a extending outward through a first side wall of the metal powder pressed block 31. The second pin includes a second bending structure 33b extending outward through a side wall opposite to the first side wall. Figure 5B As shown, the second bending structure 33b is directly opposite to the first bending structure 33a ( Figure 5A The second bending structure 33b is not shown.

[0081] The second winding body 32b includes a second winding coil 40b, a third pin coupled to a first end of the second winding coil 40b, and a fourth pin coupled to a second end of the second winding coil 40b. The third pin also includes a third bending structure 34a extending outward through a first side wall of the metal powder pressed block 31. The fourth pin also includes a fourth bending structure 34b extending outward through a side wall opposite to the first side wall. Figure 5B As shown, the fourth bending structure 34b is directly opposite to the third bending structure 34a ( Figure 5A The fourth bending structure 34b is not shown.

[0082] In the space defined by the groove 35 and the bottom layer 52 , the first peripheral control component 36 and the second peripheral control component 37 are accommodated.

[0083] It can be seen that by arranging the first peripheral control device 36 and the second peripheral control device 37 (only for schematic illustration, the actual situation may be multiple resistors, multiple capacitors and other devices) in the space defined by the groove 35 and the bottom layer 52, there is no need to find an empty space on the printed circuit board 20 that is not occupied by the metal powder pressed block 31 as in the related art, and the planar space resources on the board are fully utilized. Therefore, the switching power supply of the embodiment of the utility model can improve the energy density, and is particularly suitable for power supply environments with small space and high power consumption. Moreover, in the embodiment of the utility model, there is no need to package the power switch, controller, inductor component, etc. into a complete power unit (Power Block), which saves the cost of using the switching power supply.

[0084] exist Figure 5A to Figure 5B In the figure, the specific structure of the integrated power unit of two discrete switching power supplies is exemplarily described, in which the first winding body 32a and the second winding body 32b can be integrated into an inductor array.

[0085] It should be noted that not all modules in the above structural diagrams are necessary, and some steps or modules in the above description can be ignored according to actual needs. The execution order of each step is not fixed and can be adjusted as needed. The division of each module is only for the convenience of describing the functional division adopted. In actual implementation, a module can be implemented by multiple modules, and the functions of multiple modules can also be implemented by the same module. These modules can be located in the same device or in different devices.

[0086] The hardware modules in each embodiment can be implemented mechanically or electronically. For example, a hardware module may include a specially designed permanent circuit or logic device (such as a dedicated processor, such as an FPGA or ASIC) for performing a specific operation. The hardware module may also include a programmable logic device or circuit (such as a general-purpose processor or other programmable processor) temporarily configured by software to perform a specific operation. As for whether to implement the hardware module mechanically, or using a dedicated permanent circuit, or using a temporarily configured circuit (such as configured by software), it can be decided based on cost and time considerations.

[0087] In this article, "schematic" means "serving as an example, an example or an illustration", and any diagram or implementation method described as "schematic" in this article should not be interpreted as a more preferred or more advantageous technical solution. In order to make the drawings concise, each figure only schematically shows the parts related to the utility model, and does not represent its actual structure as a product. In addition, in order to make the drawings concise and easy to understand, in some figures, only one of the parts with the same structure or function is schematically drawn, or only one of them is marked. In this article, "one" does not mean that the number of the relevant parts of the utility model is limited to "only one", and "one" does not mean that the number of the relevant parts of the utility model is "more than one". In this article, "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. are only used to indicate the relative position relationship between the relevant parts, rather than to limit the absolute position of these relevant parts.

[0088] The above is only a preferred embodiment of the utility model, and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An inductor component, characterized in that: include: Winding body; A block formed by pressing metal powder, wherein the block is formed by pressing metal powder and wraps the winding body; The bottom surface of the metal powder pressed block facing the printed circuit board is provided with a groove, and the groove is suitable for accommodating electronic components arranged on the printed circuit board.

2. The inductor assembly according to claim 1, characterized in that: The winding body includes a winding coil, a first pin coupled to a first end of the winding coil, and a second pin coupled to a second end of the winding coil; The first pin comprises a first bent structure extending outward through a first side wall of the metal powder pressed block; The second pin includes a second bending structure extending outward through the opposite side wall of the first side wall; The first bending structure and the second bending structure are coupled to the printed circuit board.

3. The inductor assembly according to claim 2, characterized in that: The groove is between the first bending structure and the second bending structure.

4. The inductor assembly according to claim 2, characterized in that: The groove is located at two opposite sides of the first bending structure and the second bending structure.

5. The inductor assembly according to claim 2, characterized in that: The groove is between the first bending structure and the second bending structure and at two opposite sides of the first bending structure and the second bending structure.

6. A switching power supply, characterized in that: include: A printed circuit board, comprising a first layer and a second layer; A power switch, arranged on the first layer; A controller, arranged on the second layer; Peripheral control devices are arranged on the second layer; An inductor component is arranged on the second layer; The inductor assembly comprises: a winding body; a metal powder pressed block, wherein the metal powder pressed block wraps the winding body; wherein the bottom surface of the metal powder pressed block facing the second layer has a groove, wherein the groove is suitable for accommodating the peripheral control device.

7. The switching power supply according to claim 6, characterized in that: The winding body includes a winding coil, a first pin coupled to a first end of the winding coil, and a second pin coupled to a second end of the winding coil; The first pin comprises a first bent structure extending outward through a first side wall of the metal powder pressed block; The second pin includes a second bending structure extending outward through the opposite side wall of the first side wall; The first bending structure and the second bending structure are coupled to the second layer.

8. The switching power supply according to claim 7, characterized in that: The groove is between the first bending structure and the second bending structure.

9. The switching power supply according to claim 7, characterized in that: The groove is located at two opposite sides of the first bending structure and the second bending structure.

10. The switching power supply according to claim 7, characterized in that: The groove is between the first bending structure and the second bending structure and at two opposite sides of the first bending structure and the second bending structure.

11. The switching power supply according to any one of claims 6 to 10, characterized in that: The peripheral control device includes at least one of the following: Resistance; capacitance.

12. The switching power supply according to any one of claims 6 to 10, characterized in that: The first layer is a top layer, and the second layer is a bottom layer.

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