TLVR dual-winding inductor

Abstract

The application discloses a TLVR double-winding inductor, which comprises a target magnetic core 102, a primary side inductor 106 and a secondary side inductor 108, wherein the target magnetic core 102 comprises a magnetic core shell 102-1 with a containing cavity, parts of the primary side inductor 106 and the secondary side inductor 108 are located in the containing cavity, the primary side inductor 106 comprises a first pin 106-1 and a fourth pin 106-2, the secondary side inductor 108 comprises a second pin 108-1 and a third pin 108-2, the first pin 106-1, the second pin 108-1, the third pin 108-2 and the fourth pin 106-2 are arranged on the outer surface of the magnetic core shell 102-1, and the above technical scheme solves the problems of high welding failure rate and the like of the TLVR double-winding inductor in the prior art.

Description

Technical Field

[0001] This application relates to the field of computers, and more specifically, to a TLVR dual-winding inductor. Background Technology

[0002] The TLVR (Trans-Inductor Voltage Regulator) architecture is a newly developed VR (Voltage Regulator) power supply architecture in recent years. Its biggest difference from the traditional DC to DCBuck (DC, Direct Current) architecture is that it replaces the traditional single-wound ordinary inductor with a TLVR inductor that has two windings and is similar to a transformer. Ordinary inductors have only one set of windings with two pins, while TLVR inductors have two sets of mutually coupled windings with four pins. The two have a great difference in structure.

[0003] Currently, the structural design of traditional TLVR inductors requires compatibility with the power supply architecture of ordinary inductors. This necessitates that the dimensions of traditional TLVR inductors be completely identical to those of ordinary inductors, and the two outer pins must also be compatible with the package form of the two outer pins of ordinary inductors. The sequential arrangement of the four pins leads to crowded spacing between multiple pins, making short circuits prone to occur during the soldering process. Furthermore, when checking for cold solder joints on the two inner pins, the obstructed view due to their location makes it impossible to observe whether the inner pins have been cold solder joints. As a result, the cold solder joint inspection process for TLVR dual-winding inductors is not only inefficient but also prone to false positives, leading to an increased soldering failure rate for TLVR dual-winding inductors.

[0004] There is still no effective solution to the problem of high welding failure rate in TLVR dual-winding inductors in related technologies. Summary of the Invention

[0005] This application provides a TLVR dual-winding inductor to at least solve the problem of high welding failure rate in related technologies.

[0006] According to one embodiment of the present application, a TLVR dual-winding inductor is provided, comprising:

[0007] A target magnetic core, a primary-side inductor, and a secondary-side inductor, wherein the target magnetic core includes a core housing with a receiving cavity, portions of the primary-side inductor and the secondary-side inductor are located within the receiving cavity, the primary-side inductor includes a first pin and a fourth pin, and the secondary-side inductor includes a second pin and a third pin, the first pin, the second pin, the third pin, and the fourth pin are arranged on the outer surface of the core housing, and a first central axis and a second central axis are perpendicular to each other, the first central axis being the central axis of the first pin and the fourth pin, and the second central axis being the central axis of the second pin and the third pin;

[0008] The primary inductor is used to generate a first inductance by interacting with the target magnetic core when the first pin and the fourth pin are energized.

[0009] The secondary inductor is used to generate a second inductor coupled to the first inductor when the second pin and the third pin are energized, in conjunction with the target magnetic core.

[0010] Optionally, the secondary inductor further includes: a second U-shaped portion, and the target magnetic core further includes a magnetic core portion located within the receiving cavity and on the inner surface of the magnetic core housing, wherein the second U-shaped portion is located on the outer periphery of the magnetic core portion;

[0011] When the secondary inductor is horizontally unfolded, the surface of the second U-shaped portion is square, and the second pin and the third pin are respectively connected to one diagonal of the second U-shaped portion. The surface of the secondary inductor is a centrally symmetrical shape.

[0012] Optionally, both the second pin and the third pin have square surfaces when unfolded.

[0013] Optionally, the primary-side inductor further includes a first U-shaped portion, which is located on the outer periphery of the second U-shaped portion, and there is a gap between the first U-shaped portion and the second U-shaped portion;

[0014] When the primary inductor is horizontally unfolded, the surface of the first U-shaped portion is square, and the first pin and the fourth pin are respectively connected to opposite sides of the first U-shaped portion. The surface of the primary inductor is an axisymmetric shape.

[0015] Optionally, both the first pin and the fourth pin have square surfaces when unfolded.

[0016] Optionally, the first U-shaped portion and the second U-shaped portion are parallel to each other.

[0017] Optionally, the first pin and the fourth pin are arranged on one set of opposite sides of the bottom surface of the target magnetic core, and the second pin and the third pin are arranged on another set of opposite sides of the bottom surface of the target magnetic core.

[0018] Optionally, in the case of multiple TLVR dual-winding inductors connected in series, the third pin of the previous TLVR dual-winding inductor is connected to the second pin of the next TLVR dual-winding inductor.

[0019] Optionally, the target magnetic core is made of ferrite.

[0020] Optionally, the primary inductor and the secondary inductor are made of copper.

[0021] According to another embodiment of this application, a server power supply is also provided, including: a power supply circuit and a TLVR dual-winding inductor, wherein the TLVR dual-winding inductor includes a target magnetic core, a primary-side inductor, and a secondary-side inductor. The target magnetic core includes a core housing with a receiving cavity. Parts of the primary-side inductor and the secondary-side inductor are located within the receiving cavity. The pins of the primary-side inductor and the secondary-side inductor are respectively arranged around the outer surface of the core housing.

[0022] The primary-side inductor is used to connect to the power supply circuit;

[0023] The secondary inductor is used to connect to the power supply circuit and to form a mutual inductance coil group with the primary inductor;

[0024] The power supply circuit is used to supply power to the central processing unit in the server, and the TLVR dual-winding inductor is used to store energy during the power supply process of the power supply circuit.

[0025] Optionally, the primary-side inductor includes a first pin and a fourth pin, and the secondary-side inductor includes a second pin and a third pin, wherein...

[0026] The first central axis and the second central axis are perpendicular to each other. The first central axis is the central axis between the first pin and the fourth pin, and the second central axis is the central axis between the second pin and the third pin. The first pin, the second pin, the third pin, and the fourth pin are all connected to the power supply circuit.

[0027] When the first pin and the fourth pin are energized, the primary inductor interacts with the target magnetic core to generate a first inductance. When the second pin and the third pin are energized, the secondary inductor interacts with the target magnetic core to generate a second inductance coupled to the first inductor.

[0028] Optionally, the primary inductor further includes a first U-shaped portion, and the secondary inductor further includes a second U-shaped portion. The target magnetic core further includes a magnetic core portion located within the receiving cavity and on the inner surface of the magnetic core housing. The second U-shaped portion is located on the outer periphery of the magnetic core portion, and the first U-shaped portion is located on the outer periphery of the second U-shaped portion. There is a gap between the first U-shaped portion and the second U-shaped portion.

[0029] When the primary inductor is horizontally unfolded, the surface of the first U-shaped portion is square, and the first pin and the fourth pin are respectively connected to opposite sides of the first U-shaped portion. The surface of the primary inductor is an axisymmetric figure.

[0030] When the secondary inductor is horizontally unfolded, the surface of the second U-shaped portion is square, and the second pin and the third pin are respectively connected to one diagonal of the second U-shaped portion. The surface of the secondary inductor is a centrally symmetrical shape.

[0031] Optionally, the server power supply includes multiple TLVR dual-winding inductors, wherein the multiple TLVR dual-winding inductors are connected in series. In the series structure, the second pin of the first TLVR dual-winding inductor and the third pin of the last TLVR dual-winding inductor are connected to the power supply circuit, and the third pin of the previous TLVR dual-winding inductor is connected to the second pin of the next TLVR dual-winding inductor.

[0032] In this embodiment of the application, a TLVR dual-winding inductor includes: a target magnetic core, a primary-side inductor, and a secondary-side inductor. The target magnetic core includes a core housing with a receiving cavity. A portion of the primary-side inductor and a portion of the secondary-side inductor are located within the receiving cavity. The primary-side inductor includes a first pin and a fourth pin, and the secondary-side inductor includes a second pin and a third pin. The first, second, third, and fourth pins are arranged on the outer surface of the core housing, and a first central axis and a second central axis are perpendicular to each other. The first central axis is the central axis between the first and fourth pins, and the second central axis is the central axis between the second and third pins. The primary-side inductor, when the first and fourth pins are energized, interacts with the target magnetic core to generate a first inductance. The secondary-side inductor, when the second and third pins are energized, interacts with the target magnetic core to generate a second inductance coupled to the first inductor. Specifically, the first, second, third, and fourth pins are arranged on the outer surface of the core housing, and the first and second central axes are perpendicular to each other. The first central axis is the central axis between the first and fourth pins, and the second central axis is the central axis between the second and third pins. This arrangement differs from the traditional TLVR inductor's sequential arrangement of four pins, which results in crowded spacing between pins. The above-mentioned arrangement of the four pins in the TLVR dual-winding inductor provides sufficient spacing between the pins, reducing the risk of short circuits caused by excessively close proximity of pins during soldering. Furthermore, all four pins are arranged on the outer surface of the core housing. The second and third pins, which are typically located on the inside in a traditional TLVR inductor, are now located on the outside of the core housing, reducing the difficulty in detecting poor solder joints on the inner pins during soldering. This technical solution addresses the high soldering failure rate of TLVR dual-winding inductors in related technologies, achieving a significant reduction in the soldering failure rate. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a TLVR dual-winding inductor according to an embodiment of this application;

[0036] Figure 2This is a bottom comparison diagram of a common inductor and a conventional TLVR inductor according to an embodiment of this application;

[0037] Figure 3 This is a cross-sectional view of a conventional TLVR inductor according to an embodiment of this application;

[0038] Figure 4 This is a schematic diagram showing the secondary inductance of a conventional TLVR inductor and a TLVR dual-winding inductor according to an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of the series wiring of a conventional TLVR inductor and a TLVR dual-winding inductor according to an embodiment of this application. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0042] This embodiment provides a TLVR dual-winding inductor. Figure 1 This is a schematic diagram of a TLVR dual-winding inductor according to an embodiment of this application, as shown below. Figure 1As shown, the TLVR dual-winding inductor 100 includes: a target magnetic core 102, a primary-side inductor 106, and a secondary-side inductor 108. The target magnetic core 102 includes a core housing 102-1 with a receiving cavity. A portion of the primary-side inductor 106 and the secondary-side inductor 108 are located within the receiving cavity. The primary-side inductor 106 includes a first pin 106-1 and a fourth pin 106-2, and the secondary-side inductor 108 includes a second pin 108-1 and a third pin 108-2. The first pin 106-1, the second pin 108-1, the fourth pin 106-2, the fifth pin 106-1, the sixth pin 106-1, the seventh pin 106-1, the ninth pin 106-1, the tenth pin 106-1, the eleventh pin 106-1, the eleventh pin 108 ... Three pins 108-2 and four pins 106-2 are arranged on the outer surface of the magnetic core housing 102-1, and the first central axis and the second central axis are perpendicular to each other. The first central axis is the central axis between the first pin 106-1 and the fourth pin 106-2, and the second central axis is the central axis between the second pin 108-1 and the third pin 108-2. A primary inductor 106 is used to generate a first inductance by interacting with the target magnetic core 102 when the first pin 106-1 and the fourth pin 106-2 are energized. A secondary inductor 108 is used to generate a first inductance between the second pin 108-1 and the third pin 108-2. When the three-pin 108-2 is energized, it interacts with the target magnetic core 102 to generate a second inductor coupled with the first inductor. Specifically, the first pin 106-1, the second pin 108-1, the third pin 108-2, and the fourth pin 106-2 are arranged on the outer surface of the magnetic core housing 102-1, and the first and second central axes are perpendicular to each other. The first central axis is the axis between the first pin 106-1 and the fourth pin 106-2, and the second central axis is the axis between the second pin 108-1 and the third pin 108-2. This arrangement differs from the sequential arrangement of inductors in traditional TLVR systems. The four pins of a traditional TLVR dual-winding inductor tend to be crowded together. However, the pin arrangement described above for a TLVR dual-winding inductor provides sufficient spacing between the pins, reducing the risk of short circuits caused by excessively close proximity during soldering. Furthermore, all four pins are positioned on the outer surface of the core housing. The second and third pins, which are typically located on the inside of the traditional TLVR inductor, are now located on the outside of the core housing, reducing the difficulty in detecting poor soldering on the inner pins. This technical solution addresses the high soldering failure rate of TLVR dual-winding inductors in related technologies, achieving a significant reduction in their soldering failure rate.

[0043] It should be noted that the TLVR architecture is a relatively new VR power supply architecture that has emerged in recent years. Its biggest difference from the traditional DC-to-DC Buck architecture is that it replaces the traditional single-wound inductor with a dual-wound, transformer-like TLVR inductor. Figure 2 This is a bottom comparison diagram of a common inductor and a conventional TLVR inductor according to an embodiment of this application, as shown below. Figure 2 As shown, a regular inductor has only one set of windings with two pins, while a traditional TLVR inductor has two sets of mutually coupled windings with four pins. The two are very different in terms of structure.

[0044] Unlike the conventional single-winding inductor power supply architecture, the biggest advantages of the TLVR architecture include, but are not limited to, faster dynamic response and cost advantages. Due to its unique structure, the added coupling inductor inside the TLVR architecture can provide extra energy during VR's dynamic response, thereby improving the VR's dynamic response capability.

[0045] Based on this, the number and capacitance of the output capacitors can be greatly optimized, thereby achieving cost optimization. With its significant advantages in dynamic performance and cost, the TLVR architecture is bound to become an important direction for the future.

[0046] Given the significant advantages of the TLVR architecture, those skilled in the art currently consider it when designing VR systems, but they also incorporate the power supply architecture of conventional inductors. In other words, to save on the development costs of two separate solutions, those skilled in the art typically design a PCB (Printed Circuit Board) compatible with both the TLVR and conventional inductor architectures. This further restricts the structural form of the designed conventional TLVR inductor; its dimensions must be completely identical to those of a conventional inductor, and its two outer pins must also be compatible with the package form of the two pins of a conventional inductor. Figure 2 As shown, traditional TLVR inductors have four pins arranged side-by-side on the bottom, requiring individual soldering of each pin during use. Due to the structural form and dimensions of traditional TLVR inductors, the distance between the first and fourth pins, and between the second and third pins, is less than 1.5mm. Considering the solder creep characteristics, this easily leads to short circuits between the first and second pins, and between the third and fourth pins, during soldering. A short circuit between the first and second pins, or between the third and fourth pins, directly affects the normal operation of the TLVR inductor, ranging from affecting the VR power supply to potentially burning out the circuit board.

[0047] Meanwhile, in traditional TLVR inductors, such as Figure 2As shown, the second and third pins are completely below the TLVR inductor and located on the inside. Due to visual obstruction, it's impossible to manually inspect for potential cold solder joints on the second and third pins. Cold solder joints (also known as "cold soldering") refer to problems during the soldering process in circuit board manufacturing, resulting in incomplete contact between the solder joint and the metal of the circuit board, thus affecting the circuit board's performance. There are many causes of cold solder joints, including soldering temperature, time, pressure, and solder quality. Some common manifestations of cold solder joints include irregular appearance, rough surface, weak connection between the solder joint and the circuit, and problems such as resistance changes or open circuits. Cold solder joints can reduce the stability and reliability of the circuit board, ultimately affecting the operation of the entire circuit system. Therefore, during circuit board manufacturing and soldering, it is necessary to avoid cold solder joints and to accurately troubleshoot these problems to ensure the quality and stability of the solder joints.

[0048] In addition, due to the limitations of the traditional TLVR inductor's structural form and size, Figure 3 This is a cross-sectional view of a conventional TLVR inductor according to an embodiment of this application, such as... Figure 3 As shown, a traditional TLVR inductor includes a primary inductor, a secondary inductor, and an iron core (magnetic core). However, the distance between the first and fourth pins, and the second and third pins in a traditional TLVR inductor is too close, which makes it easy to encounter short circuits between the first and second pins, and between the third and fourth pins during soldering. These are locations prone to short circuits.

[0049] PCB production lines typically use AOI (Automated Optical Inspection) and X-ray technology to inspect for short circuits and cold solder joints that occur during production. AOI can magnify specific areas of the board, allowing visual inspection to detect external short circuits or cold solder joints. X-ray can see through semiconductors, providing a more direct view of soldering problems. However, because the core of an inductor is made of ferrite, existing X-ray technology cannot penetrate the inductor and therefore cannot assess the soldering condition of the internal pins. It cannot detect short circuits between the pins of a TLVR inductor or open solder joints on the second and third pins. Furthermore, since the second and third pins are located inside a traditional TLVR inductor, their view is obstructed by the first and fourth pins on the outside. This results in low efficiency and a high rate of missed detections for AOI technology, leading to a high soldering failure rate for traditional TLVR inductors.

[0050] Current server designs do not directly address the risks of pin short circuits and cold solder joints during traditional TLVR inductor soldering. Instead, they employ ICT (In-Circuit Test) stations to intercept these issues by adding interception mechanisms. ICT testing technology is a widely used automated testing method in circuit board manufacturing and assembly. ICT testing is typically performed in the middle and later stages of circuit board manufacturing to check whether components are correctly installed, possess the correct electrical characteristics, and verify that the circuit board meets design requirements. During ICT testing, the test instrument inserts the circuit board into a test fixture and then performs a series of tests on the components using test probes or styluses, including resistance, capacitance, inductance, open circuit, and short circuit characteristics. The test results are compared with the circuit board design specifications to determine whether the circuit board passes the test. ICT testing offers advantages such as high speed, high coverage, high accuracy, and good repeatability, improving the quality and efficiency of circuit board manufacturing and reducing product defects and costs. Therefore, in the electronics manufacturing industry, ICT testing has become a common testing method. Its interception method is often to run specific test scripts and determine whether there are short circuits and poor soldering inside the traditional TLVR inductor based on the script's execution results. On the one hand, the above process still causes cost loss, and on the other hand, the increased interception methods will inevitably increase the production time of PCB boards, reduce production efficiency, and bring greater cost loss.

[0051] It should be noted that the TLVR dual-winding inductor proposed in this application is different from the traditional TLVR inductor and is a new type of TLVR. The above-mentioned TLVR dual-winding inductor has a different pin arrangement than the traditional TLVR inductor. All TLVR dual-winding inductors in this application are new types of TLVR that are different from the traditional TLVR inductor.

[0052] In one exemplary embodiment, the secondary inductor further includes a second U-shaped portion, and the target magnetic core further includes a core portion located within the receiving cavity and on the inner surface of the magnetic core housing, the second U-shaped portion being located on the outer periphery of the core portion; when the secondary inductor is horizontally unfolded, the surface of the second U-shaped portion is square, and the second pin and the third pin are respectively connected to a diagonal of the second U-shaped portion, the surface of the secondary inductor being a centrally symmetrical pattern.

[0053] Optionally, in this embodiment, Figure 4 This is a schematic diagram showing the secondary inductance of a conventional TLVR inductor and a TLVR dual-winding inductor according to an embodiment of this application, as shown below. Figure 4As shown, a traditional TLVR inductor has four pins. Pins one and four are the primary inductor pins, and pins two and three are the secondary inductor pins. Ordinary inductors only have pins one and four and lack an internal secondary coupling inductor. As can be seen from the figure, the secondary inductor of a traditional TLVR inductor unfolds into a regular elongated shape. The difference between the TLVR dual-winding inductor in this application and the traditional TLVR inductor lies in the design of the second and third pin positions. The TLVR dual-winding inductor optimizes and improves the arrangement of the second and third pins compared to the traditional TLVR inductor. The second and third pins, which were traditionally located on the inside of the TLVR inductor, are moved to the sides of the inductor. After optimization, the secondary side of the TLVR dual-winding inductor unfolds into a Z-shape.

[0054] Optionally, in this embodiment, the TLVR dual-winding inductor improves upon the traditional TLVR inductor package by arranging the two internal pins on both sides of the TLVR inductor. This increases the spacing between the internal pins, mitigating the risk of short circuits between internal pins in traditional TLVR inductors. Furthermore, placing the previously invisible internal pins on both sides of the TLVR dual-winding inductor makes all pins visible, resolving the issue of VR malfunction caused by the inability to check for cold or empty solder joints.

[0055] In one exemplary embodiment, both the second pin and the third pin have square surfaces when unfolded.

[0056] Optionally, in this embodiment, the second and third pins can be other shapes when unfolded, including circles, trapezoids, etc. The key is the deployment position of the pins at the bottom of the TLVR dual-winding inductor, and the shape of the pins is not limited.

[0057] In an exemplary embodiment, the primary inductor further includes a first U-shaped portion located on the outer periphery of a second U-shaped portion, with a gap between the first U-shaped portion and the second U-shaped portion; when the primary inductor is horizontally unfolded, the surface of the first U-shaped portion is square, and the first pin and the fourth pin are respectively connected to opposite sides of the first U-shaped portion, and the surface of the primary inductor is an axisymmetric shape.

[0058] Optionally, in this embodiment, the TLVR dual-winding inductor contains two inductors: the larger outer one is the primary inductor, and the smaller inner one is the secondary inductor. The primary inductor includes a first U-shaped portion, and the secondary inductor includes a second U-shaped portion. When the primary and secondary inductors are deployed within the receiving cavity, there is a gap between the first U-shaped portion and the second U-shaped portion.

[0059] In one exemplary embodiment, both the first pin and the fourth pin have square surfaces when unfolded.

[0060] Optionally, in this embodiment, the first and fourth pins can be other shapes when unfolded, including circles, trapezoids, etc., and the shape of the pins is not limited.

[0061] In one exemplary embodiment, the first U-shaped portion and the second U-shaped portion are parallel to each other.

[0062] Optionally, in this embodiment, the first U-shaped portion and the second U-shaped portion being parallel to each other means that each portion is parallel. The U-shaped portion includes an arc-shaped portion and a vertical portion, and the arc-shaped portions of the two U-shaped portions are parallel, as are the vertical portions.

[0063] In an exemplary embodiment, the first pin and the fourth pin are arranged on one set of opposite sides of the bottom surface of the target magnetic core, and the second pin and the third pin are arranged on another set of opposite sides of the bottom surface of the target magnetic core.

[0064] Optionally, in this embodiment, such as Figure 4 As shown, the first and fourth pins are symmetrically distributed on a pair of opposite sides of the bottom surface of the target magnetic core, and the second and third pins are symmetrically distributed on another pair of opposite sides of the bottom surface of the target magnetic core.

[0065] In one exemplary embodiment, when multiple TLVR dual-winding inductors are connected in series, the third pin of the previous TLVR dual-winding inductor is connected to the second pin of the next TLVR dual-winding inductor.

[0066] Due to the change in the position of the internal inductor pins, this invention designs a more favorable method for inductor layout and routing in TLVR architectures. Figure 5 This is a schematic diagram of the series wiring of a conventional TLVR inductor and a TLVR dual-winding inductor according to an embodiment of this application, as shown below. Figure 5 As shown, this invention optimizes the inductor packaging structure. The increased spacing between the first and second pins, and the third and fourth pins, eliminates the risk of short circuits due to solder bridging during soldering. Simultaneously, placing the second and third pins on opposite sides of the inductor allows direct observation of their soldering, preventing cold solder joints and open circuits. Compared to traditional TLVR inductor layouts, this invention proposes a more rational, space-saving, and advantageous layout method. Figure 5As shown, the left side represents the layout of a traditional TLVR inductor, while the right side represents the optimized layout of a TLVR dual-winding inductor proposed in this application. Because the secondary inductors of all TLVR inductors need to be connected in series, traditional TLVR inductors require a Z-shaped layout design to cross-connect the secondary inductors. However, the TLVR dual-winding inductor design proposed in this application can achieve the series connection of all TLVR inductors using the shortest path, making it simpler and more convenient. Since inductors are magnetic devices with significant internal voltage fluctuations, a simpler layout design reduces the impact of the inductor's magnetic field radiation on surrounding devices.

[0067] In one exemplary embodiment, the target magnetic core is made of ferrite.

[0068] Optionally, in this embodiment, the target magnetic core can also be made of ceramic core, powder iron core, etc.

[0069] In one exemplary embodiment, the primary inductor and the secondary inductor are made of copper.

[0070] Optionally, in this embodiment, the primary and secondary inductors can also be made of other conductors, such as iron, silver, and other metals.

[0071] This embodiment provides a server power supply, including: a power supply circuit and a TLVR dual-winding inductor. The TLVR dual-winding inductor includes a target magnetic core, a primary-side inductor, and a secondary-side inductor. The target magnetic core includes a core housing with a receiving cavity. A portion of the primary-side inductor and the secondary-side inductor are located within the receiving cavity. The pins of the primary-side inductor and the secondary-side inductor are respectively arranged around the outer surface of the core housing.

[0072] The primary-side inductor is used to connect to the power supply circuit;

[0073] The secondary inductor is used to connect to the power supply circuit and to form a mutual inductance coil group with the primary inductor;

[0074] The power supply circuit is used to supply power to the central processing unit in the server, and the TLVR dual-winding inductor is used to store energy during the power supply process of the power supply circuit.

[0075] Optionally, in this embodiment, the server power supply may, but is not limited to, powering the central processing unit in the server, or powering any device in the server that requires power; no limitation is made here.

[0076] Optionally, in this embodiment, the server power supply includes a power supply circuit and a TLVR dual-winding inductor. The TLVR dual-winding inductor is a device used for energy storage in the power supply circuit. The TLVR dual-winding inductor can generate coupled inductance with the target magnetic core through the interaction of its internal primary-side inductance and secondary-side inductance, thereby achieving the energy storage function.

[0077] In one exemplary embodiment, the primary-side inductor includes a first pin and a fourth pin, and the secondary-side inductor includes a second pin and a third pin, wherein...

[0078] The first central axis and the second central axis are perpendicular to each other. The first central axis is the central axis between the first pin and the fourth pin, and the second central axis is the central axis between the second pin and the third pin. The first pin, the second pin, the third pin, and the fourth pin are all connected to the power supply circuit.

[0079] When the first pin and the fourth pin are energized, the primary inductor interacts with the target magnetic core to generate a first inductance. When the second pin and the third pin are energized, the secondary inductor interacts with the target magnetic core to generate a second inductance coupled to the first inductor.

[0080] Optionally, in this embodiment, the TLVR dual-winding inductor includes a primary-side inductor and a secondary-side inductor. The primary-side inductor and the secondary-side inductor are connected to the power supply circuit by soldering their respective pins to the power supply circuit. Due to the arrangement of the pins (first pin, second pin, third pin, and fourth pin), the pins are all on the outside, so that after the pins are soldered to the power supply circuit, the inner pins will not be blocked by the outer pins. Problems such as cold solder joints and short circuits that occur during the pin soldering process can be detected in time, making the detection more convenient.

[0081] In an exemplary embodiment, the primary inductor further includes a first U-shaped portion, and the secondary inductor further includes a second U-shaped portion. The target magnetic core further includes a core portion located within the receiving cavity and on the inner surface of the magnetic core housing. The second U-shaped portion is located on the outer periphery of the core portion, and the first U-shaped portion is located on the outer periphery of the second U-shaped portion. There is a gap between the first U-shaped portion and the second U-shaped portion.

[0082] When the primary inductor is horizontally unfolded, the surface of the first U-shaped portion is square, and the first pin and the fourth pin are respectively connected to opposite sides of the first U-shaped portion. The surface of the primary inductor is an axisymmetric figure.

[0083] When the secondary inductor is horizontally unfolded, the surface of the second U-shaped portion is square, and the second pin and the third pin are respectively connected to one diagonal of the second U-shaped portion. The surface of the secondary inductor is a centrally symmetrical shape.

[0084] Optionally, in this embodiment, unlike traditional TLVR inductors where the secondary inductor is horizontally unfolded and the second and third pins are connected to opposite sides of the second U-shaped portion, and the surface of the secondary inductor is axially symmetrical, resulting in a dense pin arrangement and a vertically linear arrangement of the pins in traditional TLVR inductors, making it difficult to easily detect cold solder joints or short circuits on the inner pins, this embodiment modifies the connection between the second and third pins in the second U-shaped portion of the secondary inductor. The second and third pins are each connected to a diagonal of the second U-shaped portion, and the surface of the secondary inductor is centrally symmetrical. This allows the second and third pins to be arranged around the outer surface of the core housing, preventing them from being obstructed by the outer pins, thus making it easier to detect cold solder joints or short circuits.

[0085] In one exemplary embodiment, the server power supply includes a plurality of TLVR dual-winding inductors, wherein the plurality of TLVR dual-winding inductors are connected in series. In the series connection, the second pin of the first TLVR dual-winding inductor and the third pin of the last TLVR dual-winding inductor are connected to the power supply circuit, and the third pin of the previous TLVR dual-winding inductor is connected to the second pin of the next TLVR dual-winding inductor.

[0086] Optionally, in this embodiment, such as Figure 5 As shown, in traditional TLVR inductors, the second and third pins are located on the inner side of the outer surface of the core housing. Therefore, when multiple traditional TLVR inductors are connected in series, the vertical position of the third pin of the previous traditional TLVR inductor is different from that of the second pin of the next traditional TLVR inductor. This requires an additional bend in the connection line, resulting in longer lines and losses. In contrast, the arrangement of the second and third pins in a traditional TLVR inductor is modified. The vertical position of the third pin of the previous TLVR dual-winding inductor is the same as that of the second pin of the next TLVR dual-winding inductor. This eliminates the need for an additional bend in the connection line, resulting in a simpler circuit and no unnecessary losses.

[0087] It should be noted that this application proposes a design for a TLVR dual-winding inductor, which improves the internal pin arrangement based on the traditional TLVR inductor package by placing the two internal pins on both sides of the TLVR dual-winding inductor. On the one hand, this increases the spacing between the internal pins, eliminating the risk of short circuits between the internal pins of traditional TLVR inductors. On the other hand, placing the previously invisible internal pins on both sides of the TLVR inductor makes all pins visible, solving the problem of VR malfunction caused by the inability to check for cold or empty solder joints on the internal pins.

[0088] Secondly, due to the change in the position of the internal inductor pins, this application also proposes a layout routing method that is more conducive to TLVR inductors. Compared with the traditional layout routing method of TLVR inductors, this invention proposes a more reasonable, space-saving, and advantageous layout method.

[0089] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. A TLVR dual-winding inductor, characterized in that, include: A target magnetic core, a primary-side inductor, and a secondary-side inductor, wherein the target magnetic core includes a core housing with a receiving cavity, portions of the primary-side inductor and the secondary-side inductor are located within the receiving cavity, the primary-side inductor includes a first pin and a fourth pin, and the secondary-side inductor includes a second pin and a third pin, the first pin, the second pin, the third pin, and the fourth pin are arranged on the outer surface of the core housing, and a first central axis and a second central axis are perpendicular to each other, the first central axis being the central axis of the first pin and the fourth pin, and the second central axis being the central axis of the second pin and the third pin; The primary inductor is used to generate a first inductance by interacting with the target magnetic core when the first pin and the fourth pin are energized. The secondary inductor is used to generate a second inductor coupled to the first inductor when the second pin and the third pin are energized, by interacting with the target magnetic core. The secondary inductor further includes a second U-shaped portion. The target magnetic core also includes a core portion located within the receiving cavity and on the inner surface of the core housing. The second U-shaped portion is located on the outer periphery of the core portion. When the secondary inductor is horizontally unfolded, the surface of the second U-shaped portion is square, and the second pin and the third pin are respectively connected to a diagonal of the second U-shaped portion. The surface of the secondary inductor is a centrally symmetrical shape.

2. The TLVR dual-winding inductor according to claim 1, characterized in that, Both the second pin and the third pin have square surfaces when unfolded.

3. The TLVR dual-winding inductor according to claim 1, characterized in that, The primary inductor further includes a first U-shaped portion, which is located on the outer periphery of the second U-shaped portion, and there is a gap between the first U-shaped portion and the second U-shaped portion; When the primary inductor is horizontally unfolded, the surface of the first U-shaped portion is square, and the first pin and the fourth pin are respectively connected to opposite sides of the first U-shaped portion. The surface of the primary inductor is an axisymmetric shape.

4. The TLVR dual-winding inductor according to claim 3, characterized in that, Both the first pin and the fourth pin have square surfaces when unfolded.

5. The TLVR dual-winding inductor according to claim 3, characterized in that, The first U-shaped portion and the second U-shaped portion are parallel to each other.

6. The TLVR dual-winding inductor according to claim 1, characterized in that, The first pin and the fourth pin are arranged on one pair of opposite sides of the bottom surface of the target magnetic core, and the second pin and the third pin are arranged on another pair of opposite sides of the bottom surface of the target magnetic core.

7. The TLVR dual-winding inductor according to any one of claims 1 to 5, characterized in that, In the case of multiple TLVR dual-winding inductors connected in series, the third pin of the previous TLVR dual-winding inductor is connected to the second pin of the next TLVR dual-winding inductor.

8. The TLVR dual-winding inductor according to any one of claims 1 to 5, characterized in that, The target magnetic core is made of ferrite.

9. The TLVR dual-winding inductor according to any one of claims 1 to 5, characterized in that, The primary inductor and the secondary inductor are made of copper.

10. A server power supply, characterized in that, include: A power supply circuit and a TLVR dual-winding inductor are disclosed. The TLVR dual-winding inductor includes a target magnetic core, a primary-side inductor, and a secondary-side inductor. The target magnetic core includes a core housing with a receiving cavity. A portion of the primary-side inductor and a portion of the secondary-side inductor are located within the receiving cavity. The leads of the primary-side inductor and the secondary-side inductor are respectively arranged around the perimeter of the outer surface of the core housing. The primary-side inductor is used to connect to the power supply circuit; The secondary inductor is used to connect to the power supply circuit and to form a mutual inductance coil group with the primary inductor; The power supply circuit is used to supply power to the central processing unit in the server, and the TLVR dual-winding inductor is used to store energy during the power supply process of the power supply circuit. The primary inductor includes a first pin and a fourth pin, and the secondary inductor includes a second pin and a third pin. The first central axis and the second central axis are perpendicular to each other. The first central axis is the central axis between the first pin and the fourth pin, and the second central axis is the central axis between the second pin and the third pin. The secondary inductor further includes a second U-shaped portion. The target magnetic core also includes a core portion located within the receiving cavity and on the inner surface of the magnetic core housing. The second U-shaped portion is located on the outer periphery of the core portion. When the secondary inductor is horizontally unfolded, the surface of the second U-shaped portion is square, and the second pin and the third pin are respectively connected to one diagonal of the second U-shaped portion. The surface of the secondary inductor is a centrally symmetrical shape.

11. The server power supply according to claim 10, characterized in that, The first pin, the second pin, the third pin, and the fourth pin are all connected to the power supply circuit; When the first pin and the fourth pin are energized, the primary inductor interacts with the target magnetic core to generate a first inductance. When the second pin and the third pin are energized, the secondary inductor interacts with the target magnetic core to generate a second inductance coupled to the first inductor.

12. The server power supply according to claim 11, characterized in that, The primary inductor further includes a first U-shaped portion, which is located on the outer periphery of the second U-shaped portion, and there is a gap between the first U-shaped portion and the second U-shaped portion; When the primary inductor is horizontally unfolded, the surface of the first U-shaped portion is square, and the first pin and the fourth pin are respectively connected to opposite sides of the first U-shaped portion. The surface of the primary inductor is an axisymmetric shape.

13. The server power supply according to any one of claims 11 to 12, characterized in that, The server power supply includes multiple TLVR dual-winding inductors, wherein the multiple TLVR dual-winding inductors are connected in series. In the series structure, the second pin of the first TLVR dual-winding inductor and the third pin of the last TLVR dual-winding inductor are connected to the power supply circuit, and the third pin of the previous TLVR dual-winding inductor is connected to the second pin of the next TLVR dual-winding inductor.

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