Integrated transformer and integrated magnetic part

Abstract

The invention discloses an integrated transformer which comprises a primary winding and a secondary winding, the primary winding comprises four groups of sub-windings which are connected in series, an upper and lower layer staggered balance winding winding structure is adopted, the first group of sub-windings is a starting winding of the primary winding, a first metal winding layer close to the secondary winding is taken as a starting line, and a second metal winding layer close to the secondary winding is taken as a starting line. Sequentially winding m1 turns in parallel from outside to inside; the second group of sub-windings penetrate to the second metal winding layer from the ending position of the m1th turn to sequentially wind m2 turns in parallel from outside to inside; the third group of sub-windings serves as a starting line of the second metal winding layer at the ending position of m2 turns, penetrates to the first metal winding layer and is sequentially wound for n1 turns in parallel from inside to outside; and the fourth group of sub-windings penetrate to the second metal winding layer at the ending position of the n1 turns and are continuously wound for n2 turns in parallel from inside to outside in sequence. Compared with the prior art, the integrated transformer can effectively reduce equivalent parasitic capacitance between the primary winding and the secondary winding by adopting the specific staggered PCB windings on the primary side and the secondary side.

Description

Technical Field

[0001] This invention relates to the design of a multi-layered transformer, and particularly to an integrated transformer and integrated magnetic components that reduce parasitic capacitance between the primary and secondary windings. Background Technology

[0002] With the rapid development of switching power supply technology, micropower power supply products are making further breakthroughs towards higher efficiency, smaller size, higher frequency, and flatter designs. In chip power supply design, the two most important types of devices are power semiconductor devices and magnetic components. With the advent of third-generation power semiconductor devices represented by GaN and SiC, the losses of switching devices have been significantly reduced, giving chip power supplies the opportunity to further develop towards higher frequency, flatter designs, and higher power density.

[0003] Currently, the power transmission magnetic components of chip power supplies mainly adopt the traditional winding method of hollow transformer structure.

[0004] The traditional C-type winding method for PCB windings lacks balancing capacitors, introducing large parasitic capacitances between the primary and secondary sides. This leads to significant EMI common-mode noise, impacting the power supply's EMI performance, a problem that becomes more pronounced in high-frequency applications at MHz. To address EMI noise caused by parasitic capacitances between transformer windings, existing technologies employ shielding layers. While this effectively reduces EMI noise from transformer parasitic parameters, it increases the number of winding layers and winding losses. Therefore, designing a winding structure that reduces parasitic capacitances between the primary and secondary sides based on topology characteristics can optimize EMI performance while maintaining size, efficiency, and cost.

[0005] Coreless air transformers offer advantages such as simple structure and low cost; however, they also suffer from limited inductance, poor coupling, and poor EMI radiation. Therefore, by selecting a suitable core material and adding magnetic structures to the air transformer, inductance, coupling, and EMI radiation performance can be effectively improved.

[0006] In conclusion, by optimizing the winding method and adding magnetic structures based on the hollow transformer structure, the overall performance of the micropower supply can be further improved, enhancing product competitiveness. Summary of the Invention

[0007] This invention addresses the shortcomings of existing technologies by disclosing a transformer design technique that reduces parasitic capacitance between primary and secondary windings. Based on the traditional hollow transformer structure, a multi-layered winding structure with alternating primary and secondary windings is creatively proposed, effectively reducing parasitic capacitance between the primary and secondary windings without the need for a shielding layer. Furthermore, this invention proposes combining the disclosed winding structure with a shielding layer and partial magnetic structure to further enhance the overall performance of the transformer.

[0008] To achieve the above-mentioned objectives, the improved technical solution provided by the present invention is as follows: An integrated transformer includes a primary winding and a secondary winding, each winding having a multi-layered stacked structure, including a metal winding layer, a dielectric layer, and a core plate layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. The primary winding includes four sets of sub-windings connected in series, each consisting of two metal winding layers, namely a first metal winding layer and a second metal winding layer, employing an alternating balanced winding structure. The first set of sub-windings is the starting point of the primary winding. The initial winding begins with the first metal winding layer closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second sub-winding starts from the end of the m1 turn and passes through the second metal winding layer, where it is wound in parallel with m2 turns from the outside to the inside. The third sub-winding starts from the end of the m2 turn and passes through the first metal winding layer, where it is wound in parallel with n1 turns from the inside to the outside. The fourth sub-winding starts from the end of the n1 turn and passes through the second metal winding layer, where it continues to be wound in parallel with n2 turns from the inside to the outside.

[0009] Preferably, the secondary winding includes four sets of sub-windings connected in series, consisting of two layers of metal windings: a first metal winding layer and a second metal winding layer. A staggered, balanced winding structure is used. The first set of sub-windings is the starting winding of the primary winding, starting from the third metal winding layer closest to the primary winding, and winding e1 turns in parallel from the outside in. The second set of sub-windings, starting from the end of the e1 turn, passes through the fourth metal winding layer and winds e2 turns in parallel from the outside in. The third set of sub-windings, starting from the end of the e2 turn, serves as the starting line for the fourth metal winding layer, passes through the first metal winding layer and winds f1 turns in parallel from the inside out. The fourth set of sub-windings, starting from the end of the f1 turn, passes through the second metal winding layer and continues to wind f2 turns in parallel from the inside out.

[0010] Preferably, the first turn of the primary winding and the first turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system, and the last turn of the primary winding and the last turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system.

[0011] Preferably, it further includes a first metal shielding layer and / or a second metal shielding layer. The first metal shielding layer is composed of a multi-turn winding, all of which is connected to the primary side ground and is adjacent to the primary side winding along the z-space direction of the xyz coordinate system. A first insulating layer is provided between the first metal shielding layer and the primary side winding. The second metal shielding layer is composed of a multi-turn winding, all of which is connected to the secondary side ground and is adjacent to the secondary side winding along the z-space direction of the xyz coordinate system. A second insulating layer is provided between the second metal shielding layer and the secondary side winding.

[0012] Preferably, the upper and lower layer staggered series winding structure of the integrated transformer can be laterally expanded: the first group of sub-windings is composed of upper and lower layer windings connected in series with m1 turns wound in parallel from the outside to the inside; the second group of sub-windings is composed of upper and lower layer windings connected in series with m2 turns wound in parallel from the outside to the inside; the third group of sub-windings is composed of upper and lower layer windings connected in series with n1 turns wound in parallel from the inside to the outside; and the fourth group of sub-windings is composed of upper and lower layer windings connected in series with n2 turns wound in parallel from the inside to the outside.

[0013] Preferably, the upper and lower layer interleaved series winding structure of the integrated transformer can be longitudinally expanded: it is composed of g two-layer metal windings connected in series or in parallel, where g is a natural number greater than or equal to 1.

[0014] Preferably, it also includes a magnetic core structure attached to one side of the multilayer stacked structure in the z-space direction of the xyz coordinate system.

[0015] Preferably, the magnetic core structure on one side includes: a magnetic core structure attached to the upper or lower side of the multilayer stacked structure in the z-space direction of the xyz coordinate system; or a central column magnetic core structure attached to the horizontal center of the multilayer stacked structure along the z-space direction of the xyz coordinate system; or a side column magnetic core structure attached to the horizontal edge of the multilayer stacked structure along the z-space direction of the xyz coordinate system, forming a magnetic integrated transformer structure.

[0016] This invention also provides an integrated magnetic component with a multi-layered stacked structure, including a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. The integrated magnetic component includes four sets of sub-windings connected in series. The metal winding layer is distributed in two layers, namely a first metal winding layer and a second metal winding layer, and adopts an upper and lower layer staggered balanced winding structure. The first set of sub-windings is the starting winding of the primary winding, starting from the first metal winding layer and winding m1 turns in parallel from the outside to the inside. The second set of sub-windings enters the second metal winding layer from the end of the m1 turn and winds m2 turns in parallel from the outside to the inside. The third set of sub-windings enters the first metal winding layer from the end of the m2 turn as the starting line of the second metal winding layer and winds n1 turns in parallel from the inside to the outside. The fourth set of sub-windings enters the second metal winding layer from the end of the n1 turn and continues to wind n2 turns in parallel from the inside to the outside.

[0017] Preferably, it further includes a first metal shielding layer, which is composed of a multi-turn winding, all of which is connected to the primary side ground and is adjacent to the primary side winding along the z-space direction of the xyz coordinate system. A first insulating layer is provided between the first metal shielding layer and the primary side winding. A second metal shielding layer is composed of a multi-turn winding, all of which is connected to the secondary side ground and is adjacent to the secondary side winding along the z-space direction of the xyz coordinate system. A second insulating layer is provided between the second metal shielding layer and the secondary side winding.

[0018] This invention, integrating a transformer and integrated magnetic components, mainly focuses on three aspects: innovative winding method, addition of a shielding layer, and addition of a magnetic structure. It discloses an integrated magnetic component design scheme that aligns with the future development of power supply products, offering the following advantages compared to existing technologies: 1. A primary and secondary winding structure with alternating upper and lower layers is proposed, which can effectively reduce the parasitic capacitance between the primary and secondary windings without adding a shielding layer; 2. A proposed addition of a shielding layer structure is suggested to further improve the EMI performance of the topology; 3. It is proposed to add some magnetic structure to further improve the power stage performance of the topology, reduce the impact of EMI radiation, and increase power density. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the stacked structure of the integrated magnetic component in the first, second, third, and sixth embodiments of the present invention; Figure 2 A cross-sectional view of the unextended metal winding layer in the xyz coordinate system in the first embodiment on the yz plane; Figure 3 Cross-sectional views of the extended metal winding layer in the xyz coordinate system in the first and third embodiments on the yz plane; Figure 4a Cross-sectional views of the unextended metal winding layer in the xyz coordinate system in the second and sixth embodiments; Figure 4b Cross-sectional views of the extended metal winding layer in the xyz coordinate system in the second and sixth embodiments; Figure 5 Three-dimensional equivalent structural diagrams of the multi-layered hollow transformers in embodiments four, seven, nine, and twelve; Figure 6 The fourth and ninth embodiments show the cross-sectional view of the extended metal winding layer in the yz plane of the xyz coordinate system; Figure 7 Three-dimensional equivalent structural diagrams of the multi-layered hollow transformers in embodiments five, eight, and ten; Figure 8The fifth and tenth embodiments show the cross-sectional view of the extended metal winding layer in the yz plane of the xyz coordinate system; Figure 9 Cross-sectional views of the extended metal winding layer in the xyz coordinate system in embodiments seven and twelve; Figure 10 A cross-sectional view of the extended metal winding layer in the yz plane of the xyz coordinate system in the eighth embodiment; Figure 11 Three-dimensional equivalent structural diagrams of the multi-layered hollow transformers in embodiments 11, 13, 14, and 15; Figure 12 Cross-sectional views of the extended metal winding layer in the yz plane of the xyz coordinate system in embodiments eleven and fourteen; Figure 13 Cross-sectional views of the extended metal winding layer in the yz plane of the xyz coordinate system in embodiments thirteen and fifteen; Figure 14 Three-dimensional equivalent structural diagram of the multi-layered magnetic transformer of the sixteenth embodiment; Figure 15 A cross-sectional view of the extended metal winding layer in the yz plane of the xyz coordinate system in the sixteenth embodiment.

[0020] The reference numerals in the above figures are explained as follows: c. Primary winding, a1. First metal winding layer, a2. Second metal winding layer; d. Secondary winding, b1. Third metal winding layer, b2. Fourth metal winding layer; j1. First metal shielding layer; j2. Second metal shielding layer; 80. Top cover, 81. Bottom cover, 82. Core center post, 83. Core side post. Detailed Implementation

[0021] The technical solution of the present invention will now be described with reference to the accompanying drawings and embodiments to enable those skilled in the art to better understand the invention. However, the specific implementation of the technical solution of the present invention is not limited thereto.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0023] Unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this invention, unless otherwise stated, directional terms such as "up," "down," "left," and "right" are generally used in relation to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational orientation of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0025] First Embodiment The main concept of this invention is to effectively reduce the parasitic capacitance between the primary and secondary windings by employing an alternating primary and secondary winding structure without adding a shielding layer. Based on this inventive concept, this invention provides an integrated transformer with a multi-layered structure, such as... Figure 1 The diagram shows the three-dimensional equivalent structure of the integrated transformer in Embodiment 1, which includes: a metal winding layer, a dielectric layer, and a core plate layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 2 The figure shown is a cross-sectional view of the unextended metal winding layer in the xyz coordinate system in the first embodiment, the metal winding layer including: primary winding c and secondary winding d.

[0026] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and winding m1 turns in parallel from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to wind m2 turns in parallel from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to wind n1 turns in parallel from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to wind n2 turns in parallel from the inside to the outside. The winding ends can then be led out as the ending winding ends of the primary winding.

[0027] The secondary winding d consists of two multi-turn metal winding layers, b1 and b2.

[0028] like Figure 3 Here is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the first embodiment, on the yz plane: The upper and lower layers of the primary winding c can be laterally expanded in an interleaved series winding structure: the first set of sub-windings and the second set of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of upper and lower layers of windings wound in parallel from the outside in, connected in series; the third and fourth sub-winding groups are composed of n1, n2...n i-1n i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0029] The primary winding c can be expanded longitudinally by being composed of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The secondary winding d consists of two or more layers of multi-turn windings.

[0030] Second Embodiment Example 2 provides an integrated transformer with a multi-layered structure, differing from the first example in the secondary winding. For example... Figure 1 The diagram shown is a three-dimensional equivalent structure of Embodiment 2, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 4a The figure shown is a cross-sectional view of the unextended metal winding layer in the yz plane of the xyz coordinate system in the second embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0031] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0032] The secondary winding d includes four sets of sub-windings connected in series, consisting of at least two metal winding layers b1 and b2, namely the third metal winding layer b1 and the fourth metal winding layer b2. The first set of sub-windings serves as the starting winding of the secondary winding d, starting from the third metal winding layer b1 closest to the primary winding, and winding e1 turns in parallel from the outside to the inside. The second set of sub-windings passes through the fourth metal winding layer b2 at the end of the e1 turn and continues to wind e2 turns in parallel from the outside to the inside. The third set of sub-windings serves as the starting line of the fourth metal winding layer b2 at the end of the e2 turn, passes through the third metal winding layer b1 at the end of the e2 turn and continues to wind f1 turns in parallel from the inside to the outside, and passes through the fourth metal winding layer b2 at the end of the f1 turn and continues to wind f2 turns in parallel from the inside to the outside.

[0033] like Figure 4b The image shown is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the second embodiment, on the yz plane. The upper and lower layers of the primary winding c can be laterally expanded in an interleaved series winding structure: the first set of sub-windings and the second set of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of two layers of metal windings wound in parallel from the outside in, connected in series; the third and fourth sub-windings are composed of n1, n2...n i-1 n i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0034] The alternating series winding structure of the secondary winding d can be laterally expanded: the first set of sub-windings and the second set of sub-windings are formed by e 1、 e2...e i-1 e i The winding consists of two parallel layers of metal windings connected in series from the outside in; the third and fourth sub-windings are composed of f1, f2...f... i-1 f i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0035] The primary winding c can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The secondary winding d can be expanded longitudinally in terms of the number of layers, consisting of h two-layer metal windings connected in series or parallel longitudinally; where h is a natural number ≥ 1.

[0036] Third Embodiment Example 3 provides an integrated transformer with a multi-layered structure, differing from the first example in the aligned distribution structure of the first turn of the primary winding and the first turn of the secondary winding. For example... Figure 1 The diagram shown is a three-dimensional equivalent structure of Embodiment 3, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 3 The figure shown is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the third embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0037] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0038] The secondary winding consists of at least two layers of multi-turn windings; The upper and lower layers of the primary winding interleaved series winding structure can be laterally expanded: the first group of sub-windings and the second group of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of upper and lower layers of windings wound in parallel from the outside in, connected in series; the third and fourth sub-winding groups are composed of n1, n2...n i-1 n i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0039] The primary winding can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The first turn of the primary winding and the first turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system, and the last turn of the primary winding and the last turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system.

[0040] Fourth embodiment Example 4 provides an integrated transformer with a multi-layered structure, which differs from the first example in that a first metal shielding layer is added. For example... Figure 5 The diagram shown is a three-dimensional equivalent structure of Embodiment 4, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 6 The figure shown is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the fourth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0041] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0042] The secondary winding consists of at least two layers of multi-turn windings. The upper and lower layers of the primary winding c can be laterally expanded in an interleaved series winding structure: the first set of sub-windings and the second set of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of two layers of metal windings wound in parallel from the outside in, connected in series; the third and fourth sub-windings are composed of n1, n2...n i-1 n i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0043] The primary winding c can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The multi-layer stacked structure of the integrated transformer further includes a first metallic shielding layer j1 consisting of multiple turns of winding. This first metallic shielding layer j1 is adjacent to the primary winding along the z-space direction in the xyz coordinate system. All shielding windings are connected to the primary ground, separated by an insulating layer. This addition of the shielding layer structure further enhances the EMI performance of the topology.

[0044] Fifth embodiment Example 5 provides an integrated transformer with a multi-layered structure, which differs from the first example in that a second metallic shielding layer is added. For example... Figure 7 The diagram shown is a three-dimensional equivalent structure of Embodiment 5, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 8 The figure shown is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the fifth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0045] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0046] The secondary winding consists of at least two layers of multi-turn windings. The upper and lower layers of the primary winding c can be laterally expanded in an interleaved series winding structure: the first set of sub-windings and the second set of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of two layers of metal windings wound in parallel from the outside in, connected in series; the third and fourth sub-windings are composed of n1, n2...n i-1 n i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0047] The primary winding c can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The multi-layer stacked structure of the integrated transformer further includes a second metal shielding layer j2 consisting of multiple turns of winding. The second metal shielding layer j2 is adjacent to the secondary winding along the z-space direction in the xyz coordinate system. All the shielding windings are connected to the secondary ground, with an insulating layer in between.

[0048] Sixth Embodiment Example 6 provides an integrated transformer with a multi-layered structure, differing from the second example in the aligned distribution structure of the first turn of the primary winding and the first turn of the secondary winding. For example... Figure 1 The diagram shown is a three-dimensional equivalent structure of Embodiment Six, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 4a The figure shown is a cross-sectional view of the unextended metal winding layer in the xyz coordinate system in the sixth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0049] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0050] The secondary winding d includes four sets of sub-windings connected in series, consisting of at least two metal winding layers b1 and b2, namely the third metal winding layer b1 and the fourth metal winding layer b2. The first set of sub-windings serves as the starting winding of the secondary winding d, starting from the third metal winding layer b1 closest to the primary winding, and winding e1 turns in parallel from the outside to the inside. The second set of sub-windings passes through the fourth metal winding layer b2 at the end of the e1 turn and continues to wind e2 turns in parallel from the outside to the inside. The third set of sub-windings serves as the starting line of the fourth metal winding layer b2 at the end of the e2 turn, passes through the third metal winding layer b1 at the end of the e2 turn and continues to wind f1 turns in parallel from the inside to the outside, and passes through the fourth metal winding layer b2 at the end of the f1 turn and continues to wind f2 turns in parallel from the inside to the outside.

[0051] Figure 4b This is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the second embodiment, on the yz plane: The upper and lower layers of the primary winding c can be laterally expanded in an interleaved series winding structure: the first set of sub-windings and the second set of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of two layers of metal windings wound in parallel from the outside in, connected in series; the third and fourth sub-windings are composed of n1, n2...n i-1 n i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0052] The alternating series winding structure of the secondary winding d can be laterally expanded: the first set of sub-windings and the second set of sub-windings are formed by e 1、 e2...e i-1 e i The winding consists of two parallel layers of metal windings connected in series from the outside in; the third and fourth sub-windings are composed of f1, f2...f... i-1 fi The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0053] The primary winding c can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The secondary winding d can be expanded longitudinally in terms of the number of layers, consisting of h two-layer metal windings connected in series or parallel longitudinally; where h is a natural number ≥ 1.

[0054] The first turn of the primary winding and the first turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system, and the last turn of the primary winding and the last turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system.

[0055] Seventh Embodiment Example 7 provides an integrated transformer with a multi-layered structure, which differs from the second example in that a first metal shielding layer is added. For example... Figure 5 The diagram shown is a three-dimensional equivalent structure of Embodiment Seven, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 9 The figure shown is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the sixth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0056] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0057] The secondary winding d includes four sets of sub-windings connected in series, consisting of at least two metal winding layers b1 and b2, namely the third metal winding layer b1 and the fourth metal winding layer b2. The first set of sub-windings serves as the starting winding of the secondary winding d, starting from the third metal winding layer b1 closest to the primary winding, and winding e1 turns in parallel from the outside to the inside. The second set of sub-windings passes through the fourth metal winding layer b2 at the end of the e1 turn and continues to wind e2 turns in parallel from the outside to the inside. The third set of sub-windings serves as the starting line of the fourth metal winding layer b2 at the end of the e2 turn, passes through the third metal winding layer b1 at the end of the e2 turn and continues to wind f1 turns in parallel from the inside to the outside, and passes through the fourth metal winding layer b2 at the end of the f1 turn and continues to wind f2 turns in parallel from the inside to the outside.

[0058] The upper and lower layers of the primary winding c can be laterally expanded in an interleaved series winding structure: the first set of sub-windings and the second set of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of two layers of metal windings wound in parallel from the outside in, connected in series; the third and fourth sub-windings are composed of n1, n2...n i-1 n i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0059] The alternating series winding structure of the secondary winding d can be laterally expanded: the first set of sub-windings and the second set of sub-windings are formed by e 1、 e2...e i-1 e i The winding consists of two parallel layers of metal windings connected in series from the outside in; the third and fourth sub-windings are composed of f1, f2...f... i-1 f i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0060] The primary winding c can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The secondary winding d can be expanded longitudinally in terms of the number of layers, consisting of h two-layer metal windings connected in series or parallel longitudinally; where h is a natural number ≥ 1.

[0061] The multi-layer stacked structure of the integrated transformer further includes a first metal shielding layer j1 consisting of multiple turns of windings. The first metal shielding layer j1 is adjacent to the primary winding along the z-space direction in the xyz coordinate system. All the shielding windings are connected to the primary ground, with an insulating layer in between.

[0062] Eighth embodiment Example 8 provides an integrated transformer with a multi-layered structure, which differs from the second example in that a second metallic shielding layer is added. For example... Figure 7 The diagram shown is a three-dimensional equivalent structure of Embodiment 8, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 10 The figure shown is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the eighth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0063] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0064] The secondary winding d includes four sets of sub-windings connected in series, consisting of at least two metal winding layers b1 and b2, namely the third metal winding layer b1 and the fourth metal winding layer b2. The first set of sub-windings serves as the starting winding of the secondary winding d, starting from the third metal winding layer b1 closest to the primary winding, and winding e1 turns in parallel from the outside to the inside. The second set of sub-windings passes through the fourth metal winding layer b2 at the end of the e1 turn and continues to wind e2 turns in parallel from the outside to the inside. The third set of sub-windings serves as the starting line of the fourth metal winding layer b2 at the end of the e2 turn, passes through the third metal winding layer b1 at the end of the e2 turn and continues to wind f1 turns in parallel from the inside to the outside, and passes through the fourth metal winding layer b2 at the end of the f1 turn and continues to wind f2 turns in parallel from the inside to the outside.

[0065] The primary winding c's upper and lower layers of interleaved series winding structure can be laterally expanded: the first winding c1 is composed of m 1、 m2...m 2i-1 m 2i The first winding is composed of upper and lower layers of windings wound in parallel from the outside in, connected in series; the second winding consists of n1, n2...n 2i-1 n i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0066] The alternating series winding structure of the secondary winding d can be laterally expanded: the d1 winding is composed of e 1、 e2...e 2i-1 e 2i The first winding is composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; the second winding consists of f1, f2...f 2i-1 f i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0067] The primary winding can be expanded in the longitudinal number of layers by connecting g two-layer primary windings c in series or parallel in the longitudinal direction; where g is a natural number ≥ 1; The secondary winding can be expanded in the longitudinal number of layers by being formed by connecting h two-layer secondary windings d in series or parallel in the longitudinal direction; where h is a natural number ≥ 1.

[0068] The multi-layer stacked structure of the integrated transformer further includes a second metal shielding layer j2 consisting of multiple turns of winding. The second metal shielding layer j2 is adjacent to the secondary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0069] Ninth Embodiment Example 9 provides an integrated transformer with a multi-layered structure, which differs from the third example in that a first metal shielding layer is added. Figure 5 The diagram shown is a three-dimensional equivalent structure of Embodiment Nine, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 6 The figure shown is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the ninth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0070] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0071] The secondary winding d consists of at least two layers of multi-turn windings. The upper and lower layers of the primary winding interleaved series winding structure can be laterally expanded: the first group of sub-windings and the second group of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of upper and lower layers of windings wound in parallel from the outside in, connected in series; the third and fourth sub-winding groups are composed of n1, n2...n i-1 n i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0072] The primary winding can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The first turn of the primary winding and the first turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system, and the last turn of the primary winding and the last turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system.

[0073] The multi-layer stacked structure of the integrated transformer further includes a first metal shielding layer j1 consisting of multiple turns of winding. The first metal shielding layer j1 is adjacent to the primary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0074] Tenth Embodiment Example 10 provides an integrated transformer with a multi-layered structure, which differs from the third example in that a second metallic shielding layer is added. For example... Figure 7 The diagram shown is a three-dimensional equivalent structure of Embodiment Nine, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 8 The figure shown is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the tenth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0075] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0076] The secondary winding consists of at least two layers of multi-turn windings. The upper and lower layers of the primary winding c can be laterally expanded in an interleaved series winding structure: the first set of sub-windings and the second set of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of two layers of metal windings wound in parallel from the outside in, connected in series; the third and fourth sub-windings are composed of n1, n2...n i-1 n i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0077] The primary winding c can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The first turn of the primary winding and the first turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system, and the last turn of the primary winding and the last turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system.

[0078] The multi-layer stacked structure of the integrated transformer further includes a second metal shielding layer j2 consisting of multiple turns of winding. The second metal shielding layer j2 is adjacent to the secondary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0079] Eleventh Embodiment Example 11 provides an integrated transformer with a multi-layered structure, which differs from the first example in that it adds a first metal shielding layer and a second metal shielding layer. For example... Figure 11 The diagram shown is a three-dimensional equivalent structure of Embodiment Eleven, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 12 The figure shown is a cross-sectional view of the extended metal winding layer in the yz plane of the xyz coordinate system in the eleventh embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0080] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0081] The secondary winding consists of at least two layers of multi-turn windings. The upper and lower layers of the primary winding c can be laterally expanded in an interleaved series winding structure: the first set of sub-windings and the second set of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of two layers of metal windings wound in parallel from the outside in, connected in series; the third and fourth sub-windings are composed of n1, n2...n i-1 n i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0082] The primary winding c can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The multi-layer stacked structure of the integrated transformer further includes a first metal shielding layer j1 consisting of multiple turns of winding. The first shielding layer j1 is adjacent to the primary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0083] The multi-layer stacked structure of the integrated transformer further includes a second metal shielding layer j2 consisting of multiple turns of winding. The second metal shielding layer j2 is adjacent to the secondary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0084] Twelfth Embodiment Example 12 provides an integrated transformer with a multi-layered structure, which differs from Example 6 in that a first metal shielding layer is added. Figure 5 The diagram shown is a three-dimensional equivalent structure of Embodiment Twelve, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 9The figure shown is a cross-sectional view of the extended metal winding layer in the yz plane of the xyz coordinate system in the twelfth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0085] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0086] The secondary winding d includes four sets of sub-windings connected in series, consisting of at least two metal winding layers b1 and b2, namely the third metal winding layer b1 and the fourth metal winding layer b2. The first set of sub-windings serves as the starting winding of the secondary winding d, starting from the third metal winding layer b1 closest to the primary winding, and winding e1 turns in parallel from the outside to the inside. The second set of sub-windings passes through the fourth metal winding layer b2 at the end of the e1 turn and continues to wind e2 turns in parallel from the outside to the inside. The third set of sub-windings serves as the starting line of the fourth metal winding layer b2 at the end of the e2 turn, passes through the third metal winding layer b1 at the end of the e2 turn and continues to wind f1 turns in parallel from the inside to the outside, and passes through the fourth metal winding layer b2 at the end of the f1 turn and continues to wind f2 turns in parallel from the inside to the outside.

[0087] The upper and lower layers of the primary winding c can be laterally expanded in an interleaved series winding structure: the first set of sub-windings and the second set of sub-windings are composed of m 1、 m2...m i-1 m i The turns are composed of two layers of metal windings wound in parallel from the outside in, connected in series; the third and fourth sub-windings are composed of n1, n2...n i-1 n i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0088] The alternating series winding structure of the secondary winding d can be laterally expanded: the first set of sub-windings and the second set of sub-windings are formed by e 1、 e2...e i-1 e iThe winding consists of two parallel layers of metal windings connected in series from the outside in; the third and fourth sub-windings are composed of f1, f2...f... i-1 f i The turn is composed of two layers of metal windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0089] The primary winding c can be expanded longitudinally in terms of the number of layers, consisting of g two-layer metal windings connected in series or parallel longitudinally; where g is a natural number ≥ 1; The secondary winding d can be expanded longitudinally in terms of the number of layers, consisting of h two-layer metal windings connected in series or parallel longitudinally; where h is a natural number ≥ 1.

[0090] The first turn of the primary winding and the first turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system, and the last turn of the primary winding and the last turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system.

[0091] The multi-layer stacked structure of the integrated transformer further includes a first metal shielding layer j1 consisting of multiple turns of winding. The first shielding layer j1 is adjacent to the primary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0092] Thirteenth Embodiment Example 13 provides an integrated transformer with a multi-layered structure, which differs from the second example in that it adds a first metal shielding layer and a second metal shielding layer. Figure 11 The diagram shown is a three-dimensional equivalent structure of Embodiment Twelve, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 13 The figure shown is a cross-sectional view of the extended metal winding layer in the yz plane of the xyz coordinate system in the twelfth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0093] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0094] The secondary winding d includes four sets of sub-windings connected in series, consisting of at least two metal winding layers b1 and b2, namely the third metal winding layer b1 and the fourth metal winding layer b2. The first set of sub-windings serves as the starting winding of the secondary winding d, starting from the third metal winding layer b1 closest to the primary winding, and winding e1 turns in parallel from the outside to the inside. The second set of sub-windings passes through the fourth metal winding layer b2 at the end of the e1 turn and continues to wind e2 turns in parallel from the outside to the inside. The third set of sub-windings serves as the starting line of the fourth metal winding layer b2 at the end of the e2 turn, passes through the third metal winding layer b1 at the end of the e2 turn and continues to wind f1 turns in parallel from the inside to the outside, and passes through the fourth metal winding layer b2 at the end of the f1 turn and continues to wind f2 turns in parallel from the inside to the outside.

[0095] The primary winding c's upper and lower layers of interleaved series winding structure can be laterally expanded: the first winding c1 is composed of m 1、 m2...m 2i-1 m 2i The first winding is composed of upper and lower layers of windings wound in parallel from the outside in, connected in series; the second winding consists of n1, n2...n 2i-1 n i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0096] The alternating series winding structure of the secondary winding d can be laterally expanded: the d1 winding is composed of e 1、 e2...e 2i-1 e 2i The first winding is composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; the second winding consists of f1, f2...f 2i-1 f i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0097] The primary winding can be expanded in the longitudinal number of layers by connecting g two-layer primary windings c in series or parallel in the longitudinal direction; where g is a natural number ≥ 1; The secondary winding can be expanded in the longitudinal number of layers by being formed by connecting h two-layer secondary windings d in series or parallel in the longitudinal direction; where h is a natural number ≥ 1.

[0098] The multi-layer stacked structure of the integrated transformer further includes a first metal shielding layer j1 consisting of multiple turns of winding. The first metal shielding layer j1 is adjacent to the primary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0099] The multi-layer stacked structure of the integrated transformer further includes a second metal shielding layer j2 consisting of multiple turns of winding. The second metal shielding layer j2 is adjacent to the secondary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0100] Fourteenth Embodiment Example fourteen provides an integrated transformer with a multi-layered structure, which differs from the third example in that it adds a first metal shielding layer and a second metal shielding layer. Figure 11 The diagram shown is a three-dimensional equivalent structure of Embodiment Fourteen, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 12 The figure shown is a cross-sectional view of the extended metal winding layer in the yz plane of the xyz coordinate system in the fourteenth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0101] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0102] The secondary winding consists of at least two layers of multi-turn windings. The primary winding c's upper and lower layers of interleaved series winding structure can be laterally expanded: the first winding c1 is composed of m 1、 m2...m 2i-1 m 2i The first winding is composed of upper and lower layers of windings wound in parallel from the outside in, connected in series; the second winding consists of n1, n2...n 2i-1 n i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0103] The primary winding can be expanded in the longitudinal number of layers by connecting g two-layer primary windings c in series or parallel in the longitudinal direction; where g is a natural number ≥ 1; The first turn of the primary winding and the first turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system, and the last turn of the primary winding and the last turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system.

[0104] The multi-layer stacked structure of the integrated transformer further includes a first metal shielding layer j1 consisting of multiple turns of winding. The first metal shielding layer j1 is adjacent to the primary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0105] The multi-layer stacked structure of the integrated transformer further includes a second metal shielding layer j2 consisting of multiple turns of winding. The second metal shielding layer j2 is adjacent to the secondary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0106] Fifteenth Embodiment Example 15 provides an integrated transformer with a multi-layered structure, differing from Example 6 in that it adds a first metal shielding layer and a second metal shielding layer. For example... Figure 11 The diagram shown is a three-dimensional equivalent structure of Embodiment Fifteen, which includes: a metal winding layer, a dielectric layer, and a core layer, each extending in the xy horizontal direction of the xyz coordinate system and stacked on top of each other in the z spatial direction of the xyz coordinate system. Figure 13 The figure shown is a cross-sectional view of the extended metal winding layer in the xyz coordinate system in the fifteenth embodiment. The metal winding layer includes: primary winding c and secondary winding d.

[0107] The primary winding c includes four sets of sub-windings connected in series, consisting of two metal winding layers a1 and a2, namely the first metal winding layer a1 and the second metal winding layer a2. The first set of sub-windings serves as the starting winding of the primary winding c, starting from the first metal winding layer a1 closest to the secondary winding, and is wound in parallel with m1 turns from the outside to the inside. The second set of sub-windings passes through the second metal winding layer a2 at the end of the m1 turns and continues to be wound in parallel with m2 turns from the outside to the inside. The third set of sub-windings starts from the second metal winding layer a2 at the end of the m2 turns, passes through the first metal winding layer a1 and continues to be wound in parallel with n1 turns from the inside to the outside. The fourth set of sub-windings passes through the second metal winding layer a2 at the end of the n1 turns and continues to be wound in parallel with n2 turns from the inside to the outside.

[0108] The secondary winding d includes four sets of sub-windings connected in series, consisting of at least two metal winding layers b1 and b2, namely the third metal winding layer b1 and the fourth metal winding layer b2. The first set of sub-windings serves as the starting winding of the secondary winding d, starting from the third metal winding layer b1 closest to the primary winding, and winding e1 turns in parallel from the outside to the inside. The second set of sub-windings passes through the fourth metal winding layer b2 at the end of the e1 turn and continues to wind e2 turns in parallel from the outside to the inside. The third set of sub-windings serves as the starting line of the fourth metal winding layer b2 at the end of the e2 turn, passes through the third metal winding layer b1 at the end of the e2 turn and continues to wind f1 turns in parallel from the inside to the outside, and passes through the fourth metal winding layer b2 at the end of the f1 turn and continues to wind f2 turns in parallel from the inside to the outside.

[0109] The primary winding c's upper and lower layers of interleaved series winding structure can be laterally expanded: the first winding c1 is composed of m 1、 m2...m 2i-1 m 2i The first winding is composed of upper and lower layers of windings wound in parallel from the outside in, connected in series; the second winding c2 consists of n1, n2...n 2i-1 n i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0110] The alternating series winding structure of the secondary winding d can be laterally expanded: the d1 winding is composed of e 1、 e2...e 2i-1 e 2i The first winding is composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; the second winding consists of f1, f2...f 2i-1 f i The turns are composed of upper and lower layers of windings wound in parallel from the inside out, connected in series; where i is a natural number ≥ 1.

[0111] The primary winding can be expanded in the longitudinal number of layers by connecting g two-layer primary windings c in series or parallel in the longitudinal direction; where g is a natural number ≥ 1; The secondary winding can be expanded in the longitudinal number of layers by being formed by connecting h two-layer secondary windings d in series or parallel in the longitudinal direction; where h is a natural number ≥ 1.

[0112] The first turn of the primary winding and the first turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system, and the last turn of the primary winding and the last turn of the secondary winding are at least partially aligned in the z-space direction of the xyz coordinate system.

[0113] The multi-layer stacked structure of the integrated transformer further includes a first metal shielding layer j1 consisting of multiple turns of winding. The first metal shielding layer j1 is adjacent to the primary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0114] The multi-layer stacked structure of the integrated transformer further includes a second metal shielding layer j2 consisting of multiple turns of winding. The second metal shielding layer j2 is adjacent to the secondary winding along the z-space direction in the xyz coordinate system, with an insulating layer in between.

[0115] Sixteenth Embodiment Example sixteen provides an integrated transformer with a multi-layered structure, differing from the previous examples in that a magnetic core structure is added. For example... Figure 14 The diagram shown is a three-dimensional equivalent structure of Embodiment Sixteen, which includes: a top cover 80, a bottom cover 81, a central column 82, and a side column 83 of the magnetic core structure.

[0116] like Figure 15 The figure shown is a cross-sectional view of the extended metal winding layer in the yz plane of the xyz coordinate system in the sixteenth embodiment. Based on the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth and fifteenth embodiments of the present invention, it further includes a magnetic core structure attached to one side of the multilayer stacked structure in the z-space direction of the xyz coordinate system, forming an integrated transformer with an added magnetic structure.

[0117] The core structure on one side includes: a core structure attached to the upper or lower side of the multilayer stacked structure in the z-space direction of the xyz coordinate system, such as top cover 80 or bottom cover 81; or a central core structure attached to the horizontal center of the multilayer stacked structure along the z-space direction of the xyz coordinate system, such as core central column 82; or a side column core structure attached to the horizontal edge of the multilayer stacked structure along the z-space direction of the xyz coordinate system, such as a side column, to form a magnetic integrated transformer structure. By adding some magnetic structure, the power stage performance of the topology is further improved, the impact of EMI radiation is reduced, and the power density is increased.

[0118] This invention integrates a transformer design that reduces the equivalent parasitic capacitance between the primary and secondary windings. By employing a specific interleaved PCB winding structure on the primary and secondary sides, the equivalent parasitic capacitance between the primary and secondary windings can be effectively reduced, thereby lowering EMI noise caused by the parasitic capacitance of the transformer's primary and secondary windings. Furthermore, adding primary and secondary shielding layers and a magnetic core structure can further reduce EMI noise. Simultaneously, adding a magnetic structure can effectively improve the transformer's inductance and the coupling between the primary and secondary windings.

[0119] The above embodiments are only used to help understand the inventive concept and technical solution of the present invention. For those skilled in the art, other equivalent application schemes that can be naturally conceived through the above description and examples without departing from the principle of the present invention, as well as some simple substitutions, improvements and modifications to the present invention, all fall within the protection scope of the claims of the present invention.

Claims

1. An integrated transformer comprising a primary winding and a secondary winding, each winding being in a multi-layered stack structure comprising metal winding layers, dielectric layers and core plate layers, each extending in the xy horizontal direction of an xyz coordinate system and stacked in the z spatial direction of the xyz coordinate system, characterized in that: the primary winding comprises four groups of sub-windings in series, each group being composed of two metal winding layers, a first metal winding layer and a second metal winding layer, and being wound in an upper and lower layer interleaved balanced winding structure, the first group of sub-windings being the starting winding of the primary winding, with the first metal winding layer close to the secondary winding as the starting line, wound in parallel from outside to inside for m1 turns; the second group of sub-windings is wound in parallel from outside to inside for m2 turns by passing from the end of the m1th turn to the second metal winding layer; the third group of sub-windings is wound in parallel from inside to outside for n1 turns by passing from the end of the m2th turn to the first metal winding layer as the starting line of the second metal winding layer; the fourth group of sub-windings is wound in parallel from inside to outside for n2 turns by passing from the end of the n1th turn to the second metal winding layer. the secondary winding comprises four groups of sub-windings in series, each group being composed of two metal winding layers, a first metal winding layer and a second metal winding layer, and being wound in an upper and lower layer interleaved balanced winding structure, the first group of sub-windings being the starting winding of the primary winding, with the third metal winding layer close to the primary winding as the starting line, wound in parallel from outside to inside for e1 turns; the second group of sub-windings is wound in parallel from outside to inside for e2 turns by passing from the end of the e1th turn to the fourth metal winding layer; the third group of sub-windings is wound in parallel from inside to outside for f1 turns by passing from the end of the e2th turn to the first metal winding layer as the starting line of the fourth metal winding layer; the fourth group of sub-windings is wound in parallel from inside to outside for f2 turns by passing from the end of the f1th turn to the second metal winding layer.

2. The integrated transformer of claim 1, wherein: The first turn of the primary winding and the first turn of the secondary winding are at least partially aligned in the z spatial direction of the xyz coordinate system, and the last turn of the primary winding and the last turn of the secondary winding are at least partially aligned in the z spatial direction of the xyz coordinate system.

3. The integrated transformer according to claim 1 or 2, characterized in that: Further comprising a first metal shielding layer and / or a second metal shielding layer, the first metal shielding layer is composed of a multi-turn winding, adjacent to the primary winding in the z spatial direction of the xyz coordinate system, and the multi-turn winding is connected to the primary ground, and a first insulating layer is provided between the first metal shielding layer and the primary winding; the second metal shielding layer is composed of a multi-turn winding, adjacent to the secondary winding in the z spatial direction of the xyz coordinate system, and the multi-turn winding is connected to the secondary ground, and a second insulating layer is provided between the second metal shielding layer and the secondary winding.

4. The integrated transformer according to claim 1 or 2, characterized in that: The upper and lower layer interleaved series winding structure of the integrated transformer can be expanded laterally: the first group of sub-windings is composed of the upper and lower layer winding series wound in parallel from outside to inside for m1 turns; the second group of sub-windings is composed of the upper and lower layer winding series wound in parallel from outside to inside for m2 turns; the third group of sub-windings is composed of the upper and lower layer winding series wound in parallel from inside to outside for n1 turns; the fourth group of sub-windings is composed of the upper and lower layer winding series wound in parallel from inside to outside for n2 turns.

5. The integrated transformer according to claim 1 or 2, characterized in that: ​ 6. The integrated transformer according to claim 1 or 2, characterized in that: The upper and lower staggered series winding structure of the integrated transformer can be longitudinally expanded: g two-layer metal winding layers are longitudinally connected in series or parallel, where g is a natural number greater than or equal to 1.

7. The integrated transformer according to claim 1 or 2, characterized in that: It also includes a magnetic core structure attached to one side of the multi-layer stacked structure in the z-space direction of the xyz coordinate system.

8. The integrated transformer of claim 7, wherein: The magnetic core structure on one side includes: a magnetic core structure attached to the upper side or the lower side of the multi-layer stacked structure in the z-space direction of the xyz coordinate system; or a middle column magnetic core structure attached to the horizontal center of the multi-layer stacked structure along the z-space direction of the xyz coordinate system; or an edge column magnetic core structure attached to the horizontal edge of the multi-layer stacked structure along the z-space direction of the xyz coordinate system, forming a magnetic integrated transformer structure.

9. An integrated magnetic component in a multi-layered stack structure, comprising a metal winding layer, a dielectric layer and a core plate layer, each extending in an xy horizontal direction of an xyz coordinate system, and stacked on each other in a z spatial direction of the xyz coordinate system, characterized in that: The integrated magnetic component includes four groups of sub-windings connected in series, and the metal winding layers are distributed in two layers, i.e., the first metal winding layer and the second metal winding layer, which adopt an upper and lower staggered balanced winding structure. The first group of sub-windings is the starting winding of the primary winding, and is wound in parallel from the outside to the inside for m1 turns with the first metal winding layer as the starting line. The second group of sub-windings is wound in parallel from the outside to the inside for m2 turns with the second metal winding layer as the starting line. The third group of sub-windings is wound in parallel from the inside to the outside for n1 turns with the first metal winding layer as the starting line. The fourth group of sub-windings is wound in parallel from the inside to the outside for n2 turns with the second metal winding layer as the starting line.

10. The integrated magnetic component of claim 9, wherein: It also includes a first metal shielding layer composed of multiple turns of winding, which is immediately adjacent to the primary winding along the z-space direction of the xyz coordinate system, and all the multiple turns of winding are connected to the primary ground. A first insulating layer is provided between the first metal shielding layer and the primary winding. A second metal shielding layer is composed of multiple turns of winding, all of which are connected to the secondary ground. The multiple turns of winding are immediately adjacent to the secondary winding along the z-space direction of the xyz coordinate system, and a second insulating layer is provided between the second metal shielding layer and the secondary winding.

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