Inductance type voltage stabilizer integrated with compensation inductor and power supply module

Abstract

The utility model relates to the technical field of power electronics, in particular to an inductance type voltage stabilizer integrated with a compensation inductor and a power supply module, which are characterized in that a coupling inductor unit and the compensation inductor are integrated in a packaging shell, and the compensation inductor is connected in series between two adjacent phases of secondary winding inductors. The two ends of the compensation inductor can be arranged on different planes respectively, in connection of two adjacent phases of secondary winding inductors, the tail end of the previous phase of secondary winding inductor and one end of the corresponding compensation inductor are located on the same welding face, and the head end of the next phase of secondary winding inductor and the other end of the corresponding compensation inductor are located on the same welding face. The two ends of the compensation inductor and the two ends of the corresponding secondary winding inductor are guaranteed to be located on the same welding face, the problem of line connection is solved, external wiring is not needed, and therefore the structure of the inductance type voltage stabilizer is more concise.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and in particular to an inductive voltage regulator and power module with integrated compensation inductor. Background Technology

[0002] Trans-Inductor Voltage Regulators (TLVRs) are primarily used in multi-phase power supply solutions to power high-current and high-power-density systems such as Graphics Processing Units (GPUs) and servers. When the system load undergoes rapid and large dynamic steps, the changing energy is coupled to the N-phase power supply through the inductive voltage regulator, thus optimizing the power supply's transient response.

[0003] like Figure 1 As shown, existing inductive voltage regulators all use the main power circuit inductor (i.e., L1~LN) coupled with the secondary winding inductor (i.e., L12~LN2). An additional compensation inductor Lc needs to be added outside the inductive voltage regulator to store and transfer energy during switching. However, this presents the following problems in practical applications:

[0004] 1. Additional compensation inductors will take up product space.

[0005] 2. When the two ends of the secondary winding inductor are not on the same printed circuit board (PCB) trace plane, an additional conductor will be needed to connect the ends of two adjacent secondary winding inductors, which will increase the trace complexity.

[0006] To more clearly explain question 2 above, please refer to... Figure 2 This inductive voltage regulator includes main power circuit inductors (i.e., L1 and L2) and secondary winding inductors (i.e., L12 and L22). The main power circuit inductor L1 is coupled to the secondary winding inductor L12, and the main power circuit inductor L2 is coupled to the secondary winding inductor L22. A lead wire needs to be extended from the beginning of the secondary winding inductor L12 to connect to the compensating inductor. Simultaneously, the end of the secondary winding inductor L12 needs to be connected to the beginning of the secondary winding inductor L22. However, the end of the secondary winding inductor L12 and the beginning of the secondary winding inductor L22 are not on the same circuit board soldering surface. Therefore, traces need to be added on both the upper and lower circuit boards, and then external connecting wires are used to connect the traces on the two circuit boards to achieve the connection between them (i.e., ...). Figure 2 The path L in the diagram increases the complexity of the routing.

[0007] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0008] The technical problem to be solved by this utility model is how to solve the problem that the two ends of the secondary coupling winding are not on the same PCB trace plane in the prior art, which requires an additional conductor to connect the beginning and end of the secondary coupling winding, thereby increasing the trace complexity, and the problem that the electrical stress borne by the compensation inductor is too large.

[0009] The present invention adopts the following technical solution:

[0010] In a first aspect, an inductive voltage regulator with integrated compensation inductor is provided, including a package housing, a first circuit board, a second circuit board, and an integrated inductor unit disposed between the first circuit board and the second circuit board, wherein the first circuit board and the second circuit board are respectively disposed on both sides of the package housing;

[0011] Each integrated inductor unit includes multiple coupled inductor units and at least one compensation inductor, with at least one compensation inductor disposed between two adjacent coupled inductor units; each coupled inductor unit includes a main circuit inductor and a secondary winding inductor, with the secondary winding inductor coupled to the main circuit inductor;

[0012] One end of the main circuit inductor is used to connect to the input voltage, and the other end of the main circuit inductor is used to connect to the power consumption terminal.

[0013] One end of the compensation inductor is connected to the secondary winding inductance of the preceding phase; the other end of the compensation inductor is connected to the secondary winding inductance of the following phase.

[0014] Preferably, the first circuit board has at least a first solder joint, a second solder joint, and a third solder joint; the second circuit board has at least a fourth solder joint, a fifth solder joint, and a sixth solder joint.

[0015] The second solder joint and the third solder joint are connected by internal wires in the first circuit board; the fourth solder joint and the fifth solder joint are connected by internal wires in the second circuit board.

[0016] One end of the secondary winding inductor of the preceding phase is connected to the first solder joint, and the other end of the secondary winding inductor of the preceding phase is connected to the fourth solder joint; one end of the compensation inductor is connected to the fifth solder joint, and the other end of the compensation inductor is connected to the second solder joint; one end of the secondary winding inductor of the following phase is connected to the third solder joint, and the other end of the secondary winding inductor of the following phase is connected to the sixth solder joint.

[0017] Preferably, an insulating cavity is provided on one side of the encapsulation shell, the compensating inductor is disposed in the insulating cavity, and the two ends of the compensating inductor are exposed from the insulating cavity.

[0018] Preferably, at least a first conductive element and a second conductive element are provided in the inner cavity of the encapsulation shell;

[0019] The other end of the secondary winding inductance of the preceding phase is connected to one end of the first conductive element, and the other end of the first conductive element is connected to one end of the compensation inductor; the other end of the compensation inductor is connected to one end of the second conductive element, and the other end of the second conductive element is connected to one end of the secondary winding inductance of the following phase.

[0020] Preferably, an inductive intercalator is disposed in the inner cavity of the encapsulation shell, and the compensating inductor is integrated in the inductive intercalator;

[0021] The other end of the secondary winding inductor of the preceding phase is connected to one end of the inductor interlocking conductor; the other end of the inductor interlocking conductor is connected to one end of the secondary winding inductor of the following phase.

[0022] Preferably, it also includes multiple switching units, each of the coupled inductor units being connected to a corresponding switching unit, the switching unit including a first switching transistor and a second switching transistor, both the first switching transistor and the second switching transistor being disposed on the first circuit board;

[0023] One end of the first switching transistor is connected to the input voltage, and the other end of the first switching transistor is connected to one end of the second switching transistor and one end of the main circuit inductor, respectively. The other end of the second switching transistor is grounded.

[0024] Preferably, it further includes an input filtering unit and an output filtering unit, one end of the input filtering unit is connected to the input voltage, and the other end of the input filtering unit is grounded; one end of the output filtering unit is connected to one end of the main circuit inductor, and the other end of the output filtering unit is grounded.

[0025] Preferably, the coupling coefficient between the compensation inductor and two adjacent coupled inductor units is less than or equal to a preset value.

[0026] Preferably, the compensation inductor is at a preset angle to the second circuit board.

[0027] In a second aspect, a power supply module is provided, including at least one inductive regulator with an integrated compensating inductor as described in the first aspect.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0029] This invention integrates both the coupling inductor unit and the compensation inductor inside the package housing. The compensation inductor is connected in series between two adjacent secondary winding inductors. The two ends of the compensation inductor can be respectively set on different planes. In the connection of two adjacent secondary winding inductors, the tail end of the previous secondary winding inductor and one end of the corresponding compensation inductor are on the same welding surface, and the head end of the next secondary winding inductor and the other end of the corresponding compensation inductor are on the same welding surface. This ensures that the two ends of the compensation inductor and the two ends of the corresponding secondary winding inductor are on the same welding surface, solving the wiring connection problem and eliminating the need for external wiring, thus making the structure of the inductive voltage regulator simpler.

[0030] On the other hand, this invention distributes the large voltage that was originally borne by the independent compensation inductor evenly across multiple compensation inductors, greatly reducing the voltage value borne by each compensation inductor and ensuring the stability of the inductive voltage regulator. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the circuit structure of a conventional inductive voltage regulator provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the internal structure of a conventional inductive voltage regulator provided in an embodiment of this utility model;

[0034] Figure 3 This is a schematic diagram of the external structure of an inductive voltage regulator with integrated compensation inductor provided in an embodiment of this utility model;

[0035] Figure 4 This is a schematic diagram of the internal structure of an inductive voltage regulator with integrated compensation inductor provided in an embodiment of this utility model;

[0036] Figure 5 This is a schematic diagram of the circuit structure of an inductive voltage regulator with integrated compensation inductor provided in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the first connection scheme provided in this embodiment of the utility model;

[0038] Figure 7 This is another structural schematic diagram of the first connection scheme provided in the embodiment of this utility model;

[0039] Figure 8 This is a schematic diagram of the structure of a multiphase coupled inductor unit provided in an embodiment of the present invention;

[0040] Figure 9 This is another schematic diagram of the structure of the multiphase coupled inductor unit provided in this embodiment of the present invention;

[0041] Figure 10 This is a structural schematic diagram of the second connection scheme provided in this embodiment of the utility model;

[0042] Figure 11 This is a structural schematic diagram of the third connection scheme provided in this embodiment of the utility model;

[0043] Figure 12 This is another structural schematic diagram of the third connection scheme provided in this embodiment of the utility model;

[0044] Figure 13 This is a structural schematic diagram of the fourth connection scheme provided in this embodiment of the utility model;

[0045] Figure 14 This is another structural schematic diagram of the fourth connection scheme provided in this utility model embodiment;

[0046] Figure 15 This is a schematic diagram of the structure of a switching unit provided in an embodiment of the present invention;

[0047] Figure 16 This is a schematic diagram of the circuit structure of a switching unit provided in an embodiment of the present utility model;

[0048] Figure 17 This is another structural schematic diagram of the inductive voltage regulator provided in this embodiment of the utility model. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0050] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.

[0051] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0052] In describing some embodiments, the terms "coupled," "coupled," and "connected," and their derivative expressions, may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "connected" or "coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other, such as "optical coupling" or "wireless connection." The embodiments disclosed herein are not necessarily limited to the scope of this invention.

[0053] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0054] Example 1:

[0055] In existing inductive voltage regulators, taking a two-phase example, such as Figure 2As shown, when the secondary winding inductors in each phase-coupled inductor unit are connected in series, the two ends to be connected (i.e., ends A and B) are located on different soldering surfaces. Therefore, traces need to be added on both the upper and lower circuit boards, and then external connecting wires are used to connect the traces on the two circuit boards to achieve the connection (i.e., ...). Figure 2 This increases the complexity of the wiring (path L), and the need for additional wiring greatly increases the complexity of the circuit design. Moreover, more wiring means more soldering points, which undoubtedly increases the probability of errors in the production process and increases production costs and the difficulty of quality control.

[0056] To address the aforementioned issues, this embodiment proposes an inductive voltage regulator with integrated compensation inductors. This inductive voltage regulator includes an integrated inductor unit, which comprises an N-phase coupled inductor unit and at least one compensation inductor. At least one compensation inductor is provided between every two adjacent coupled inductor units, where N is greater than or equal to 2. At least one compensation inductor is provided between every two adjacent coupled inductor units (i.e., one or more compensation inductors can be connected in series or parallel; this embodiment and accompanying drawings use the example of only one compensation inductor between adjacent coupled inductor units); alternatively, only a portion of adjacent coupled inductor units have compensation inductors between them, while other coupled inductor units may not have compensation inductors between them.

[0057] In one embodiment, such as Figure 4 As shown, the integrated inductor unit may include two-phase coupled inductor units.

[0058] In one embodiment, such as Figure 5 As shown, the integrated inductor unit may include N-phase coupled inductor units, and a compensation inductor is provided between each two adjacent coupled inductor units (i.e., there are a total of N-1 compensation inductors).

[0059] To facilitate the introduction of inductive voltage regulators, Figure 3 and Figure 4 To illustrate the structure of an inductive voltage regulator, consider the following example: The inductive voltage regulator includes a package housing, a first circuit board, a second circuit board, and an integrated inductor unit disposed between the first and second circuit boards. The first and second circuit boards are respectively located on opposite sides of the package housing. Each integrated inductor unit includes multiple coupled inductor units and at least one compensation inductor. At least one compensation inductor is disposed between two adjacent coupled inductor units (i.e., ...). Figure 4 The coupled inductor unit includes a main circuit inductor (including L1, L2, etc.) and a secondary winding inductor (including L12, L22, etc.). The secondary winding inductor is coupled to the main circuit inductor. One end of the main circuit inductor is used to connect to the input voltage, and the other end of the main circuit inductor is used to connect to the power consumption terminal.

[0060] One end of the compensation inductor is connected to the secondary winding inductor of the preceding phase; the other end of the compensation inductor is connected to the secondary winding inductor of the following phase, wherein the two ends of the compensation inductor are respectively on the same welding surface as the two ends of the corresponding secondary winding inductor.

[0061] It should be noted that the preceding phase and the following phase are relative concepts. The secondary winding inductance of the preceding phase and the secondary winding inductance of the following phase refer to the secondary winding inductance of each of the two adjacent coupled inductor units.

[0062] It should be noted that one end of the secondary winding inductor at the beginning is grounded, and the other end is connected to the compensating inductor or directly to the secondary winding inductor of the next phase; one end of the secondary winding inductor at the end is connected to the compensating inductor or directly to the secondary winding inductor of the preceding phase, and the other end is grounded. The other secondary winding inductors, except for those at the beginning and end, have at least two of the following connection relationships: the secondary winding inductors of the preceding and following phases are connected through the compensating inductor, or the secondary winding inductors of the preceding and following phases are connected together through other conductive components.

[0063] The enclosure serves as the physical protective barrier for the entire module. Mechanically, it resists external impacts such as collisions and vibrations, protecting the delicate internal electronic components from damage. From an electrical perspective, the enclosure provides excellent insulation, preventing electromagnetic interference from the external environment and ensuring the safe and stable operation of the inductor module under various electrical conditions.

[0064] In one embodiment, the first circuit board is disposed on the top of the package housing, and the second circuit board is disposed on the bottom of the package housing. Both are manufactured using PCB technology. The circuit boards integrate interfaces for connecting to external circuits, such as pins and sockets, to enable data interaction and power transmission between the module and other circuit systems. More specific details are not described in this embodiment.

[0065] Taking the secondary winding inductance in the first phase coupled inductor unit and the secondary winding inductance in the second phase coupled inductor unit connected in series as an example, the bottom of the secondary winding inductance in the first phase coupled inductor unit needs to be connected to the top of the secondary winding inductance in the second phase coupled inductor unit. In the prior art, an additional wire is required to achieve the connection between the two ends.

[0066] In one embodiment, the compensation inductor is integrated inside the package housing. The compensation inductor enables the series connection of the two ends of the secondary winding inductors. The second circuit board is directly connected to the compensation inductor, and then connected in series with the secondary winding inductor of the adjacent coupled inductor unit through the vertical interconnect of the first circuit board (such as metal pillars or embedded wires). No external wiring across layers is required throughout the process. The compensation inductor is embedded between the adjacent coupled inductor units and connected through a short path, reducing unnecessary external wiring.

[0067] In terms of circuit principle, when the load current increases instantaneously, the duty cycle of the pulse width modulation (PWM) of one phase of the multiphase power supply increases, causing the current flowing through the compensation inductor to increase. Since the secondary winding inductance of all phases is connected in series with the compensation inductor, the current change of the compensation inductor will be coupled to the coupling inductor units of all remaining phases, increasing the current of each phase. Similarly, when the load current decreases instantaneously, the current decrease of the compensation inductor will be coupled to the coupling inductor units of all remaining phases. This is equivalent to all phases responding to the change in transient current together, and the total output current can quickly reach the current required by the load, effectively improving the transient response of the multiphase power supply.

[0068] To further illustrate the above embodiments, this embodiment proposes multiple schemes to ensure that the two ends of the compensation inductor are on the same welding surface as the two ends of the corresponding secondary winding inductor.

[0069] In one embodiment, such as Figure 6 and Figure 7 As shown, the first scheme includes: at least a first solder joint (a) in the figure, a second solder joint (b) in the figure, and a third solder joint (c) in the figure are provided on the first circuit board; at least a fourth solder joint (not shown) in the figure, a fifth solder joint (d) in the figure, and a sixth solder joint (not shown) are provided on the second circuit board; wherein, the second solder joint and the third solder joint are connected by an internal wire (i.e., internal wire 1) in the first circuit board; the fourth solder joint and the fifth solder joint are connected by an internal wire (i.e., internal wire 2) in the second circuit board; one end of the secondary winding inductor of the preceding phase is connected to the first solder joint, and the other end of the secondary winding inductor of the preceding phase is connected to the fourth solder joint; one end of the compensation inductor is connected to the fifth solder joint, and the other end of the compensation inductor is connected to the second solder joint; one end of the secondary winding inductor of the following phase is connected to the third solder joint, and the other end of the secondary winding inductor of the following phase is connected to the sixth solder joint.

[0070] The fourth solder joint is located on the second circuit board opposite to the first solder joint, and the sixth solder joint is located on the second circuit board opposite to the third solder joint. The connection relationship between the first solder joint and other devices can be at least one of the following three cases: the first solder joint can be grounded, or the first solder joint is connected to the compensation inductor of the preceding phase, or the first solder joint is connected to the secondary winding inductor of the preceding phase. The connection relationship between the sixth solder joint and other devices can also be at least one of the following three cases: the sixth solder joint can be grounded, or the sixth solder joint is connected to the compensation inductor of the preceding phase, or the sixth solder joint is connected to the secondary winding inductor of the preceding phase.

[0071] By rationally designing the solder joints and internal wire connection methods on the first and second circuit boards, the two ends of the compensation inductor and the two ends of the corresponding secondary winding inductor can be on the same soldering surface, thereby simplifying the soldering process and reducing the complexity of the wiring.

[0072] In the first circuit board, the second and third solder joints are connected by internal wires. In the second circuit board, the fourth and fifth solder joints are connected by internal wires.

[0073] In one embodiment, refer to Figure 7 The coupling between the secondary winding inductor and the main circuit inductor is based on the principle of electromagnetic induction. Changes in the current of the main circuit inductor induce an electromotive force in the secondary winding inductor. One end of the secondary winding inductor can be connected to the first solder joint and grounded, providing a stable reference potential for the circuit and contributing to stable circuit operation. The other end of the secondary winding inductor is connected to the fourth solder joint, establishing a connection with other lines on the second circuit board. One end of the compensation inductor is connected to the fifth solder joint, and the other end is connected to the second solder joint. Since the second and third solder joints are connected through internal wires on the first circuit board, and the fifth and fourth solder joints are connected through internal wires on the second circuit board, the two ends of the compensation inductor are associated with the two ends of the corresponding secondary winding inductors, and are on the same soldering surface (achieved through solder joint connection). In adjacent coupled inductor units, one end of the secondary winding inductor is connected to the third solder joint, and then connected to the second solder joint through internal wires on the first circuit board, thus establishing a connection with one end of the compensation inductor, completing the series connection relationship between the secondary winding inductors in the entire circuit.

[0074] In one embodiment, such as Figure 8 and Figure 9 As shown, the integrated inductor unit includes a 6-phase coupled inductor unit and 5 compensation inductors. The secondary winding inductors in the 6-phase coupled inductor unit and the 5 compensation inductors are connected in series through the above scheme. More specific details will not be elaborated in this embodiment.

[0075] With the above structural design, during soldering, it is no longer necessary to run additional traces to connect the two ends of the two-phase secondary winding inductors located on different planes, as is the case with traditional methods. This greatly simplifies the soldering process and improves production efficiency. At the same time, reducing external traces lowers the risk of electrical interference and failures that may be caused by complex wiring, improves the stability and reliability of the entire inductor module, and optimizes the spatial layout of the circuit board, making the module structure more compact.

[0076] In one embodiment, refer to Figure 7 When the lengths of the secondary winding inductors (L12 and L22) are shorter than those of the main circuit inductors (L1 and L2), the internal wires 1 and 2 can be placed directly inside the package housing, ensuring the same connection method and implementation principle as the first scheme above, without having to integrate the internal wires 1 and 2 into the corresponding circuit board.

[0077] When designing an inductive voltage regulator with integrated compensation inductors, it is necessary to reasonably adjust the distance between the compensation inductor and adjacent coupled inductor units according to specific circuit performance requirements to obtain a suitable coupling coefficient, thereby optimizing circuit performance. In one embodiment, the coupling coefficient between the compensation inductor and two adjacent coupled inductor units is less than or equal to a preset value. The preset value can be 0.3.

[0078] The above are as follows Figure 6 and Figure 7 Based on the first scheme structure shown, if the influence of the coupling coefficient between inductors is not considered, in one embodiment, such as Figure 10 As shown, the second approach includes: an insulating cavity can be provided on one side of the package housing, and the compensation inductor is disposed within the insulating cavity, with both ends of the compensation inductor exposed from the insulating cavity to be connected to solder points on the circuit board. The insulating cavity is located on one side of the package housing but does not extend beyond its boundaries, allowing the compensation inductor to have an independent magnetic core and windings within a relatively enclosed insulating cavity. This avoids the influence of the coupling coefficient between the compensation inductor and adjacent coupled inductor units.

[0079] Similarly, to connect the two ends of the secondary winding inductors in adjacent two-phase coupled inductor units without using additional external wires from the inductor module, in addition to the solution of embedding internal wires in the first and second circuit boards, this embodiment also proposes another structure. In one embodiment, as shown... Figure 11As shown, the third scheme includes: at least a first conductive element and a second conductive element are provided in the inner cavity of the encapsulation shell; the other end of the secondary winding inductor of the previous phase is connected to one end of the first conductive element, and the other end of the first conductive element is connected to one end of the compensation inductor; the other end of the compensation inductor is connected to one end of the second conductive element, and the other end of the second conductive element is connected to one end of the secondary winding inductor of the next phase.

[0080] Figure 11 Taking a two-phase coupled inductor unit as an example, the first and second conductive components are typically made of materials with good conductivity and a certain degree of rigidity, such as copper or aluminum. Their shape and size may be designed according to the internal space of the package and the circuit connection requirements. Through the first and second conductive components, a complete connection path is constructed inside the package, realizing the connection between the two ends of the secondary winding inductor in adjacent coupled inductor units without the need for additional external wires.

[0081] In one embodiment, in order for the third scheme to meet the actual situation, that is, when the integrated inductor unit includes a multi-phase coupled inductor unit, it is necessary to ensure that the length of the secondary winding inductance and each compensation inductor in each phase coupled inductor unit is small enough (i.e., the proportion in the vertical direction is small) so that all devices can be placed in the package housing.

[0082] For example, if the secondary winding inductance and each compensating inductor have the same length, and their proportion in the vertical direction to the main circuit inductance is k, then when a two-phase coupled inductor unit is included, k = 1 / 3, such as... Figure 12 As shown; when a three-phase coupled inductor unit is included, k = 1 / 5; when a four-phase coupled inductor unit is included, k = 1 / 7; and so on, to obtain the length of each secondary winding inductor and the length of each compensation inductor. Based on the above setting of the ratio k of the length of the secondary winding inductor and each compensation inductor in the vertical direction to the length of the main circuit inductor, it can be ensured that when the integrated inductor unit includes a multi-phase coupled inductor unit, all components (including secondary winding inductors and compensation inductors) are housed within the package, ensuring the integrity and completeness of the inductive voltage regulator structure.

[0083] The specific value of k needs to be determined based on actual design requirements, package size limitations, and circuit performance requirements, and is not specifically limited in this embodiment. In one embodiment, the third scheme also needs to ensure that the coupling coefficient between the compensation inductor and the two adjacent coupled inductor units is less than or equal to a preset value. The preset value can be 0.3.

[0084] Similarly, to achieve the connection of the two ends of the secondary winding inductance in adjacent two-phase coupled inductor units without using external additional wires or embedding internal wires in the first and second circuit boards, this embodiment also proposes another structure. In one embodiment, such as... Figure 13 As shown, the fourth scheme includes: an inductor-embedded conductor is provided in the inner cavity of the package shell, and the compensation inductor is integrated in the inductor-embedded conductor; the other end of the secondary winding inductor of the previous phase is connected to one end of the inductor-embedded conductor; and the other end of the inductor-embedded conductor is connected to one end of the secondary winding inductor of the next phase.

[0085] In this embodiment, the compensation inductor is integrated into the inductor interlocking conductor, and the two ends of two adjacent secondary winding inductors are directly connected through the inductor interlocking conductor. In order to save internal space of the package housing, in one embodiment, the inductor interlocking conductor can be arranged parallel to the second circuit board. Figure 13 The diagram shows a two-phase coupled inductor unit and an inductor-embedded conductor. Similarly, when multi-phase coupled inductor units are included, the length of the secondary winding inductance in each coupled inductor unit must be sufficiently small in the vertical direction (i.e., its proportion in the vertical direction is small), and the length of the inductor-embedded conductor must also be sufficiently small in the horizontal direction (i.e., its proportion in the horizontal direction between the main circuit inductance in the first coupled inductor unit and the distance between the main circuit inductance in the last coupled inductor unit).

[0086] For example, if the proportion of the secondary winding inductance to the main circuit inductance length in the vertical direction is x, and the proportion of the length of the inductor-coupled conductor in the horizontal direction to the total length of the inductance from the first phase to the last phase of the main circuit is y, then when a two-phase coupled inductor unit is included, x = 1 / 2, y = 1; when a three-phase coupled inductor unit is included, x = 1 / 3, y = 1 / 2; and so on. Figure 14 As shown, when a four-phase coupled inductor unit is included, x = 1 / 4, y = 1 / 3, and so on, to obtain the length of each secondary winding inductor and the length of the inductor-embedded conductor. Based on the above settings of the proportion x of the length of the secondary winding inductor and each compensation inductor in the vertical direction to the length of the main circuit inductor, and the proportion y of the length of the secondary winding inductor and each compensation inductor in the horizontal direction to the total length of the first phase main circuit inductor to the last phase main circuit inductor, all components (including secondary winding inductors and compensation inductors) can be housed within the package when the integrated inductor unit includes a multi-phase coupled inductor unit, ensuring the integrity and completeness of the inductor regulator structure.

[0087] The specific x and y values ​​need to be determined based on actual design requirements, package size limitations, and circuit performance requirements, and are not specifically limited in this embodiment.

[0088] The above embodiments propose four different schemes to connect the two ends of the secondary winding inductors in adjacent two-phase coupled inductor units sequentially without using external additional wires. Without considering the influence of the secondary winding inductance and the length of the compensation inductor, in the first, second, and third schemes, the compensation inductor can be at a preset angle to the second circuit board. To save space, the preset angle can be 90°. In the fourth scheme, to save space, the inductor clamping conductor can be arranged parallel to the second circuit board.

[0089] In one embodiment, such as Figure 15 and Figure 16 As shown, the inductive regulator with integrated compensation inductor also includes multiple switching units. Each coupled inductor unit is connected to a corresponding switching unit. The switching unit includes a first switching transistor (i.e., Q1, Q3, Q5, or Q7) and a second switching transistor (i.e., Q2, Q4, Q6, or Q8). Both the first and second switching transistors are mounted on the first circuit board. One end of the first switching transistor is connected to the input voltage, and the other end of the first switching transistor is connected to one end of the second switching transistor and one end of the main circuit inductor, respectively. The other end of the second switching transistor is grounded.

[0090] Each phase-coupled inductor unit corresponds to a switching unit, meaning each phase-coupled inductor unit includes a first switching transistor and a second switching transistor. The first and second switching transistors are periodically switched on and off, and the input voltage (Vin) is chopped into a pulse signal through high-frequency switching action to control the energy storage and release of the inductive voltage regulator.

[0091] During the turn-on phase, when the first switch (e.g., Q1) is turned on, the input voltage charges the main circuit inductor, the current rises linearly, and energy is stored in the main circuit inductor. After the first switch is turned off, the second switch (e.g., Q2) is turned on (synchronous rectification), and the current in the main circuit inductor flows through the low-side freewheeling, releasing energy to the load. The on-time ratio (i.e., the duty cycle of the switch) is adjusted in real time according to load changes to maintain the stability of the output voltage (Vout). In one embodiment, the PWM controller corresponding to the switch monitors the output voltage Vout feedback, increasing the duty cycle to quickly replenish energy when the load suddenly increases, and decreasing the duty cycle to prevent overshoot when the load decreases.

[0092] In one embodiment, refer to Figure 16The inductive voltage regulator with integrated compensation inductor further includes an input filter unit and an output filter unit. One end of the input filter unit is connected to the input voltage, and the other end is grounded. One end of the output filter unit is connected to one end of the main circuit inductor, and the other end is grounded. Both the input filter unit and the output filter unit are mounted on a first circuit board or a second circuit board.

[0093] The input filtering unit includes capacitor C1, and the output filtering unit includes capacitors C2 and C3. Input voltages often contain various high-frequency noise and interference signals, which may adversely affect the normal operation of the module's internal circuitry. The main function of the input filtering unit is to filter out these high-frequency noise and interference signals.

[0094] The input and output filtering units work together to provide excellent filtering for the entire integrated compensated inductor voltage regulator. The input filtering unit ensures the purity of the input voltage, reducing the impact of external interference on the internal circuitry of the module, while the output filtering unit ensures the stability and high quality of the output voltage, meeting the power requirements of the load equipment.

[0095] It is worth noting that all descriptions of the methods in this embodiment are existing technologies and will not be elaborated upon in this embodiment.

[0096] In this embodiment, both the coupling inductor and the compensation inductor are integrated inside the package. The compensation inductor is connected in series between two adjacent secondary winding inductors. The two ends of the compensation inductor can be set on different planes. In the connection of two adjacent secondary winding inductors, the tail end of the previous secondary winding inductor and one end of the corresponding compensation inductor are on the same welding surface, and the head end of the next secondary winding inductor and the other end of the corresponding compensation inductor are on the same welding surface. This ensures that the two ends of the compensation inductor and the two ends of the corresponding secondary winding inductor are on the same welding surface, solving the wiring connection problem and eliminating the need for external wiring, thus making the structure of the inductive voltage regulator simpler.

[0097] Example 2:

[0098] In some application scenarios, without considering the issue that the two ends of the secondary winding inductance in a multiphase coupled inductor unit are not on the same solder surface, requiring external wires to connect the two ends of adjacent phase secondary winding inductances, such as... Figure 17 As shown, a compensation inductor can also be connected in series between the secondary winding inductors in every two-phase coupled inductor units. That is, when there are N-phase coupled inductor units, N / 2 compensation inductors need to be set.

[0099] In other embodiments, in the design of an inductive voltage regulator integrated with N (N>2) phase coupled inductor units, compensation inductors can be placed between any adjacent phases as needed. In Embodiment 1, since the two ends of the secondary winding inductors in adjacent phase coupled inductor units are connected through compensation inductors without the need for external wiring, compensation inductors are placed between each adjacent phase. In one embodiment, compensation inductors can be placed at any position and in any number of locations among the N secondary winding inductors according to actual needs. Multiple compensation inductors evenly distribute the large voltage originally borne by the independent compensation inductor across multiple compensation inductors, greatly reducing the voltage value borne by each compensation inductor, thereby ensuring the stability of the inductive voltage regulator.

[0100] Example 3:

[0101] To further illustrate the inductive voltage regulator with integrated compensation inductor proposed in Embodiments 1 and 2, this embodiment proposes a power supply module including at least one inductive voltage regulator with integrated compensation inductor.

[0102] In this embodiment, both the coupling inductor and the compensation inductor are integrated inside the package. The compensation inductor is connected in series between two adjacent secondary winding inductors. The two ends of the compensation inductor can be set on different planes. In the connection of two adjacent secondary winding inductors, the tail end of the previous secondary winding inductor and one end of the corresponding compensation inductor are on the same welding surface, and the head end of the next secondary winding inductor and the other end of the corresponding compensation inductor are on the same welding surface. This ensures that the two ends of the compensation inductor and the two ends of the corresponding secondary winding inductor are on the same welding surface, solving the wiring connection problem and eliminating the need for external wiring, thus making the structure of the inductive voltage regulator simpler.

[0103] On the other hand, in this embodiment, the large voltage that was originally borne by the independent compensation inductor is evenly distributed across multiple compensation inductors, greatly reducing the voltage value borne by each compensation inductor and ensuring the stability of the inductive voltage regulator.

[0104] For the specific structure of the inductive voltage regulator with integrated compensation inductor, please refer to Embodiment 1, which will not be repeated in this embodiment.

[0105] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An inductive voltage regulator with integrated compensation inductor, characterized in that, It includes a package housing, a first circuit board, a second circuit board, and an integrated inductor unit disposed between the first circuit board and the second circuit board, wherein the first circuit board and the second circuit board are respectively disposed on both sides of the package housing; Each integrated inductor unit includes multiple coupled inductor units and at least one compensation inductor, with at least one compensation inductor disposed between two adjacent coupled inductor units; each coupled inductor unit includes a main circuit inductor and a secondary winding inductor, with the secondary winding inductor coupled to the main circuit inductor; One end of the main circuit inductor is used to connect to the input voltage, and the other end of the main circuit inductor is used to connect to the power consumption terminal. One end of the compensation inductor is connected to the secondary winding inductance of the preceding phase; the other end of the compensation inductor is connected to the secondary winding inductance of the following phase.

2. The inductive voltage regulator with integrated compensation inductor according to claim 1, characterized in that, The first circuit board has at least a first solder joint, a second solder joint, and a third solder joint; the second circuit board has at least a fourth solder joint, a fifth solder joint, and a sixth solder joint. The second solder joint and the third solder joint are connected by internal wires in the first circuit board; the fourth solder joint and the fifth solder joint are connected by internal wires in the second circuit board. One end of the secondary winding inductor of the preceding phase is connected to the first solder joint, and the other end of the secondary winding inductor of the preceding phase is connected to the fourth solder joint; one end of the compensation inductor is connected to the fifth solder joint, and the other end of the compensation inductor is connected to the second solder joint; one end of the secondary winding inductor of the following phase is connected to the third solder joint, and the other end of the secondary winding inductor of the following phase is connected to the sixth solder joint.

3. The inductive voltage regulator with integrated compensation inductor according to claim 2, characterized in that, An insulating cavity is provided on one side of the encapsulation shell, and the compensation inductor is disposed in the insulating cavity, with both ends of the compensation inductor exposed from the insulating cavity.

4. The inductive voltage regulator with integrated compensation inductor according to claim 1, characterized in that, The inner cavity of the encapsulation shell is provided with at least a first conductive element and a second conductive element; The other end of the secondary winding inductance of the preceding phase is connected to one end of the first conductive element, and the other end of the first conductive element is connected to one end of the compensation inductor; the other end of the compensation inductor is connected to one end of the second conductive element, and the other end of the second conductive element is connected to one end of the secondary winding inductance of the following phase.

5. The inductive voltage regulator with integrated compensation inductor according to claim 1, characterized in that, An inductive intercalator is disposed in the inner cavity of the encapsulation shell, and the compensating inductor is integrated in the inductive intercalator; The other end of the secondary winding inductor of the preceding phase is connected to one end of the inductor interlocking conductor; the other end of the inductor interlocking conductor is connected to one end of the secondary winding inductor of the following phase.

6. The inductive voltage regulator with integrated compensation inductor according to any one of claims 1-5, characterized in that, It also includes multiple switching units, each of the coupled inductor units being connected to a corresponding switching unit. The switching unit includes a first switching transistor and a second switching transistor, both of which are disposed on the first circuit board. One end of the first switching transistor is connected to the input voltage, and the other end of the first switching transistor is connected to one end of the second switching transistor and one end of the main circuit inductor, respectively. The other end of the second switching transistor is grounded.

7. The inductive voltage regulator with integrated compensation inductor according to any one of claims 1-5, characterized in that, It also includes an input filtering unit and an output filtering unit. One end of the input filtering unit is connected to the input voltage, and the other end of the input filtering unit is grounded. One end of the output filtering unit is connected to one end of the main circuit inductor, and the other end of the output filtering unit is grounded.

8. The inductive voltage regulator with integrated compensation inductor according to any one of claims 1-5, characterized in that, The coupling coefficient between the compensation inductor and the two adjacent coupled inductor units is less than or equal to a preset value.

9. The inductive voltage regulator with integrated compensation inductor according to any one of claims 1-5, characterized in that, The compensation inductor is at a preset angle to the second circuit board.

10. A power supply module, characterized in that, Including at least one inductive regulator with an integrated compensation inductor as described in any one of claims 1-9.

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