Bridge type bridging capacitor voltage regulation module circuit and power supply system

Abstract

The embodiment of the invention discloses a bridge type bridging capacitor voltage regulation module circuit and a power supply system. The bridge type bridging capacitor voltage regulation module circuit comprises a voltage division converter module, a transformer module, at least two current doubling rectifier modules and an output module. The voltage-dividing converter module comprises an input power supply, two voltage-dividing capacitors, two groups of half-bridge circuits and two bridging capacitors. Each group of half-bridge circuits comprises two first switching tubes. And each current doubling rectifying module comprises a blocking capacitor, two second switching tubes and two output inductors. The output module comprises an output capacitor and an electronic load. By adopting the embodiment of the invention, high efficiency, high power density and excellent transient response can be realized at the same time under the conditions of high step-down ratio and large current load, remarkable engineering application value is shown, and the method is particularly suitable for a power supply system of a new generation of AI data center chip.

Description

Technical Field

[0001] This invention relates to the field of power electronics technology, and in particular to a bridge-type bridging capacitor voltage regulation module circuit and power supply system. Background Technology

[0002] With the deepening application of high-performance computing, the data throughput of data centers has experienced explosive growth. This trend has directly prompted a significant increase in the power supply ratings of core processors such as CPUs and GPUs. Simultaneously, against the backdrop of the rapid development of Artificial Intelligence (AI) technology, high-performance computing chips in AI data centers place even more stringent demands on power supply systems. These chips typically consume hundreds or even thousands of watts and experience significant load fluctuations within milliseconds or even microseconds. Traditional voltage regulation module topologies struggle to balance high power density, high transient response, and high efficiency, especially in low-voltage, high-current output scenarios, where conduction losses, switching losses, and wiring losses all increase significantly, leading to reduced overall power supply system efficiency and a surge in thermal design pressure.

[0003] Therefore, designing a new voltage regulator module (VRM) topology that can meet the power supply requirements of AI data center customized processing units (X Processing Units, XPUs) for high power, low voltage, and high current, while ensuring high efficiency and achieving fast transient response and high power density, has become a technical challenge that the industry urgently needs to solve. Summary of the Invention

[0004] This application provides a bridge-type bridging capacitor voltage regulation module circuit and power supply system, which can simultaneously achieve high efficiency, high power density and excellent transient response under high step-down ratio and high current load conditions, demonstrating significant engineering application value, and is particularly suitable for power supply systems of next-generation AI data center chips.

[0005] The first aspect of this application provides a bridge-type bridging capacitor voltage regulation module circuit, which includes a voltage divider converter module and a transformer module. The voltage divider converter module includes an input power supply, two voltage divider capacitors, two sets of half-bridge circuits, and two bridging capacitors. Each set of half-bridge circuits includes two first switching transistors. One of the voltage divider capacitors has its positive side connected to the positive terminal of the input power supply, one of the voltage divider capacitors has its negative side connected to the positive side of the other voltage divider capacitor, and the other voltage divider capacitor has its negative side connected to the negative terminal of the input power supply. Each half-bridge circuit corresponds to one voltage divider capacitor, one end of one of the first switching transistors is connected to the positive side of the voltage divider capacitor, the other end of one of the first switching transistors is connected to one end of another first switching transistor, and the other end of the other first switching transistor is connected to the negative side of the voltage divider capacitor. The positive side of one of the bridging capacitors is connected between the two first switching transistors in one set of the half-bridge circuits, and the negative side of the other bridging capacitor is connected between the two first switching transistors in another set of the half-bridge circuits. The negative side of one of the bridging capacitors is connected to the positive side of the other bridging capacitor. The same-named terminals of the primary side of the transformer module are connected between the two voltage dividing capacitors, and the opposite-named terminals of the primary side of the transformer module are connected between the two bridging capacitors.

[0006] In some embodiments, the bridge-type bridging capacitor voltage regulation module circuit further includes at least two current multiplier rectifier modules, each of which includes a DC blocking capacitor, two second switching transistors, and two output inductors; The same-name terminal of the negative side of the transformer module is connected to the positive terminal of the DC blocking capacitor. The negative terminal of the DC blocking capacitor is connected to one end of one of the second switching transistors and one end of one of the output inductors. The opposite-name terminal of the negative side of the transformer module is connected to one end of another second switching transistor and another output inductor. The other ends of the two output inductors are connected to...

[0007] In some embodiments, the transformer module includes at least two transformers, the number of which is the same as the number of current doubler rectifier modules, and each current doubler rectifier module corresponds to one transformer; The same-name terminal of the primary side of the first transformer is connected between the two voltage dividing capacitors, and at least two primary sides of the transformers are connected alternately in the order of opposite-name terminal, same-name terminal, and opposite-name terminal. The opposite-name terminal of the primary side of the last transformer is connected between the two bridging capacitors.

[0008] In some embodiments, the bridge-type cross-capacitor voltage regulation module circuit further includes an output module, the output module including an output capacitor and an electronic load, one end of the output capacitor being connected to the positive side of the electronic load and the other end of the two output inductors included in each current multiplier rectifier module.

[0009] In some embodiments, the windings of at least two of the transformers are integrated on the same first magnetic core, the first magnetic core comprising three magnetic columns, namely two outer columns and one middle column, wherein the windings of at least two of the transformers are concentrated and wound on the middle column.

[0010] In some embodiments, the two output inductors included in each current doubler rectifier module are negatively coupled inductors to each other, and the two output inductors included in each current doubler rectifier module are integrated in different second magnetic cores.

[0011] In some embodiments, the negative terminal of the input power supply, the other end of the second switching transistor, and the negative side of the electronic load are all grounded.

[0012] In some embodiments, both the first switch and the second switch are N-channel gallium nitride field-effect transistors.

[0013] In some embodiments, each operating cycle of the bridge-type bridging capacitor voltage regulation module circuit includes four stages; in chronological order... In the first stage, one of the first switching transistors in each half-bridge circuit and one of the second switching transistors in each current-doubling rectifier module are turned on, and the other first switching transistor in each half-bridge circuit and the other second switching transistor in each current-doubling rectifier module are turned off. In the second stage, the two first switching transistors included in each half-bridge circuit are turned off, and the two second switching transistors included in each current multiplier rectifier module are turned on. In the third stage, one of the first switching transistors in each half-bridge circuit and one of the second switching transistors in each current-doubling rectifier module are turned off, while the other first switching transistor in each half-bridge circuit and the other second switching transistor in each current-doubling rectifier module are turned on. The switching state in the fourth stage is the same as that in the second stage.

[0014] The second aspect of this application provides a power supply system for an AI data center acceleration processing unit, the power supply system for the AI ​​data center acceleration processing unit including the bridge-type cross-connect capacitor voltage regulation module circuit as described in the first aspect.

[0015] This application connects a bridging capacitor between the two switches in each half-bridge circuit on the positive side and to the negative side on the other side of the other switch. The charge balance of the bridging capacitor ensures equal average current sharing among the switches, resulting in reduced voltage stress for all switches. Because one switch in each half-bridge circuit is turned on during operation, multiple switches in multiple half-bridge circuits are always connected in parallel. This allows for segmented voltage reduction by sharing the buck ratio through the bridging capacitor, effectively reducing voltage stress and switching losses in single-stage power transistors. This enables the system to maintain high conversion efficiency even in high buck ratio scenarios, while also reducing the size of magnetic components and increasing power density. It demonstrates significant engineering application value, particularly suitable for power supply systems of next-generation AI data center chips. Attached Figure Description

[0016] 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, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This paper shows a schematic diagram of the structure of a bridge-type bridging capacitor voltage regulation module circuit according to an embodiment of the present application; Figure 2 A schematic plan view of a transformer provided in one embodiment of this application is shown; Figure 3 This invention provides a schematic diagram of the current loop structure at different stages of each operating cycle according to an embodiment of the present application. Figure 4 The diagram illustrates the waveforms of the control signal, peak current, and peak voltage as a function of duty cycle and switching transistor operating cycle provided in one embodiment of this application. Figure 5 A schematic diagram illustrating the effect of a DC blocking capacitor provided in one embodiment of this application is shown.

[0018] Figure 6 This application illustrates different stages of output inductance provided in one embodiment. A schematic diagram of the equivalent structure. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] Please refer to Figure 1 This diagram illustrates a structural schematic of a bridge-type bridging capacitor voltage regulation module circuit according to an embodiment of this application. The bridge-type bridging capacitor voltage regulation module circuit includes a voltage divider converter module 10 and a transformer module 20. The voltage divider converter module 10 includes an input power supply. Two voltage divider capacitors and Two sets of half-bridge circuits 11 and 12, and two bridging capacitors. and Each half-bridge circuit includes two first switching transistors.

[0021] For example, the half-bridge circuit 11 includes a first switching transistor. and The half-bridge circuit 12 includes a first switching transistor. and .

[0022] One of the voltage divider capacitors has its positive side connected to the positive terminal of the input power supply, one of the voltage divider capacitors has its negative side connected to the positive side of the other voltage divider capacitor, and the other voltage divider capacitor has its negative side connected to the negative terminal of the input power supply.

[0023] For example, voltage divider capacitors The positive polarity side and the input power supply The positive terminal is connected to the voltage divider capacitor. The negative polarity side and the voltage divider capacitor The positive side is connected to the voltage divider capacitor. The negative polarity side and the input power supply The negative terminal connection.

[0024] Each half-bridge circuit corresponds to one voltage divider capacitor, one end of one of the first switching transistors is connected to the positive side of the voltage divider capacitor, the other end of one of the first switching transistors is connected to one end of another first switching transistor, and the other end of the other first switching transistor is connected to the negative side of the voltage divider capacitor.

[0025] For example, the half-bridge circuit 11 corresponds to the voltage divider capacitor. First switching transistor One end is connected to the voltage divider capacitor The positive side is connected, and the first switching transistor is connected. The other end is connected to the first switching transistor One end is connected to the first switching transistor. The other end is connected to the voltage divider capacitor. The negative side is connected. The voltage divider capacitor corresponding to half-bridge circuit 12. First switching transistor One end is connected to the voltage divider capacitor The positive side is connected, and the first switching transistor is connected. The other end is connected to the first switching transistor One end is connected to the first switching transistor. The other end is connected to the voltage divider capacitor. The negative polarity side is connected.

[0026] In some embodiments, the first switching transistor is an N-channel gallium nitride field-effect transistor, i.e., the first switching transistor. , , and All are N-channel gallium nitride field-effect transistors. Therefore, the first switching transistor... Drain and voltage divider capacitor The positive side is connected, and the first switching transistor is connected. The source and the first switch The drain connection, the first switching transistor Source and voltage divider capacitor The negative polarity side is connected. First switching transistor. Drain and voltage divider capacitor The positive side is connected, and the first switching transistor is connected. The source and the first switch transistor The drain connection, the first switching transistor Source and voltage divider capacitor The negative polarity side is connected.

[0027] Due to voltage dividing capacitors The negative polarity side and the voltage divider capacitor The positive side is connected, and the first switching transistor is connected. Source and voltage divider capacitor The negative side is connected to the first switching transistor. Drain and voltage divider capacitor The positive side is connected, therefore the first switching transistor The source and the first switch transistor The drain is also connected.

[0028] The positive side of one of the bridging capacitors is connected between the two first switching transistors in one set of the half-bridge circuits, and the negative side of the other bridging capacitor is connected between the two first switching transistors in another set of the half-bridge circuits. The negative side of one of the bridging capacitors is connected to the positive side of the other bridging capacitor.

[0029] For example, bridging capacitors The positive side is connected to the first switching transistor included in the half-bridge circuit 11. and Between, bridging capacitor The negative side is connected to the first switching transistor included in the half-bridge circuit 12. and Between, bridging capacitor The negative side and the bridging capacitor The positive polarity side is connected.

[0030] The same-named terminals of the primary side of the transformer module are connected between the two voltage dividing capacitors, and the opposite-named terminals of the primary side of the transformer module are connected between the two bridging capacitors.

[0031] Similarly, due to the voltage divider capacitor The negative polarity side and the voltage divider capacitor The positive side is connected, and the first switching transistor is connected. Source and voltage divider capacitor The negative side is connected to the first switching transistor. Drain and voltage divider capacitor The positive polarity side is connected, therefore the corresponding terminals of the primary side of the transformer module are connected to the two first switching transistors. and They are also connected.

[0032] As can be seen, this application connects a bridging capacitor between the two switches in each half-bridge circuit on the positive side and to the negative side of the bridging capacitor on the other side of the other switch. The charge balance of the bridging capacitor ensures that the average current sharing among the switches is equal, and all switches experience reduced voltage stress. Because one switch in each half-bridge circuit is turned on when the bridge-type bridging capacitor voltage regulation module circuit is working, multiple switches in multiple half-bridge circuits are always connected in parallel. Thus, the step-down ratio can be shared by the bridging capacitor to achieve segmented step-down, effectively reducing the voltage stress and switching losses of single-stage power transistors. This allows the system to maintain high conversion efficiency even in high step-down ratio scenarios, while reducing the size of magnetic components and increasing power density. It demonstrates significant engineering application value and is particularly suitable for power supply systems of next-generation AI data center chips.

[0033] Please continue to refer to this. Figure 1The bridge-type bridging capacitor voltage regulation module circuit also includes at least two current multiplier rectifier modules, each of which includes a DC blocking capacitor, two second switching transistors, and two output inductors.

[0034] The same-name terminal of the negative side of the transformer module is connected to the positive terminal of the DC blocking capacitor. The negative terminal of the DC blocking capacitor is connected to one end of one of the second switching transistors and one end of one of the output inductors. The opposite-name terminal of the negative side of the transformer module is connected to one end of another second switching transistor and another output inductor. The other ends of the two output inductors are connected to...

[0035] For example, two current-multiplying rectifier modules are used here. The current-multiplying rectifier module 31 includes a DC blocking capacitor. Two second switching transistors and Two output inductors and The same-name terminal on the negative side of the transformer module and the DC blocking capacitor. The positive terminal is connected to the DC blocking capacitor. The negative terminal and the second switching transistor and output inductor One end is connected to the opposite terminal of the negative side of the transformer module and the second switching transistor. and output inductor One end is connected to two output inductors. and The other end is connected.

[0036] The current multiplier rectifier module 32 includes a DC blocking capacitor. Two second switching transistors and Two output inductors and The same-name terminal on the negative side of the transformer module and the DC blocking capacitor. The positive terminal is connected to the DC blocking capacitor. The negative terminal and the second switching transistor and output inductor One end is connected to the opposite terminal of the negative side of the transformer module and the second switching transistor. and output inductor One end is connected to two output inductors. and The other end is connected.

[0037] In some embodiments, the second switching transistor is an N-channel gallium nitride field-effect transistor, i.e., the second switching transistor. , , and All are N-channel gallium nitride field-effect transistors. Therefore, the DC blocking capacitor... The negative terminal and the second switching transistor The drain connection, the opposite terminal of the negative side of the transformer module and the second switching transistor Drain connection; DC blocking capacitor The negative terminal and the second switching transistor The drain connection, the opposite terminal of the negative side of the transformer module and the second switching transistor The drain connection.

[0038] As can be seen, this application utilizes a symmetrical secondary structure and capacitor bridging design to eliminate the DC bias current on the transformer secondary side caused by load imbalance, reduce core losses and magnetic saturation risk, and improve system operation stability and reliability.

[0039] Please continue to refer to this. Figure 1 The transformer module includes at least two transformers, the number of which is the same as the number of current multiplier rectifier modules, and each current multiplier rectifier module corresponds to one transformer; The same-name terminal of the primary side of the first transformer is connected between the two voltage dividing capacitors, and at least two primary sides of the transformers are connected alternately in the order of opposite-name terminal, same-name terminal, and opposite-name terminal. The opposite-name terminal of the primary side of the last transformer is connected between the two bridging capacitors.

[0040] For example, the transformer module includes two transformers. and The current multiplier rectifier module 31 corresponds to the transformer. The current multiplier rectifier module 32 corresponds to the transformer. ,transformer Original Edge The terminals with the same name are connected to the two voltage divider capacitors. and Between, transformer Original Edge Heterogeneous terminals and transformers Original Edge Connected to the same-named terminals, transformer Original Edge The opposite terminals are connected to the two bridging capacitors. and between.

[0041] If the transformer module includes multiple transformers Then the transformer Original Edge The terminals with the same name are connected to the two voltage divider capacitors. and Between, transformer Original Edge Heterogeneous terminals and transformers Original Edge Connected to the same-named terminals, transformer Original Edge Heterogeneous terminals and transformers Original Edge Connect the terminals with the same name, ... transformer Original Edge Heterogeneous terminals and transformers Original Edge Connected to the same-named terminals, transformer Original Edge The opposite terminals are connected to the two bridging capacitors. and between.

[0042] In some embodiments, the windings of at least two of the transformers are integrated on the same first magnetic core, the first magnetic core comprising three magnetic columns, namely two outer columns and one middle column, wherein the windings of at least two of the transformers are concentrated and wound on the middle column.

[0043] For example, the transformer module includes two transformers. and At that time, transformer and The windings are integrated on the same first magnetic core, which includes three magnetic pillars: two outer pillars and one middle pillar. (Transformer) and The windings are all concentrated on the central column, and the first magnetic core can be, for example, an ER core.

[0044] In some embodiments, the two output inductors included in each current doubler rectifier module are negatively coupled inductors to each other, and the two output inductors included in each current doubler rectifier module are integrated in different second magnetic cores.

[0045] For example, and They are negatively coupled inductors. and They are negatively coupled inductors. and Integrated into a second magnetic core and It is integrated into another second magnetic core.

[0046] As can be seen, this application improves the dynamic current response speed under load changes by using a negatively coupled inductor design, effectively suppresses output voltage fluctuations, and meets the millisecond / microsecond load change requirements of AI chips.

[0047] Please continue to refer to this. Figure 1The bridge-type cross-connected capacitor voltage regulation module circuit also includes an output module 40, which includes an output capacitor. and electronic load The output capacitor One end is connected to the electronic load The positive polarity side and the other end of the two output inductors included in each current multiplier rectifier module are all connected.

[0048] For example, when the current multiplier rectifier module includes two output capacitors... One end is connected to the electronic load The positive polarity side and and The other end and The other end is connected to the output capacitor. and electronic load in parallel.

[0049] Please continue to refer to this. Figure 1 The negative terminal of the input power supply, the other end of the second switching transistor, and the negative side of the electronic load are all grounded, i.e., the input power supply... negative terminal, second switching transistor , , and source and electron load The negative polarity side is grounded.

[0050] As can be seen, compared with the two-stage VRM, this application is simpler in structure, has fewer components, simplifies drive control and PCB routing, and reduces manufacturing costs.

[0051] Please refer to Figure 2 The diagram shows a plan view of a transformer according to an embodiment of this application. In a specific embodiment provided in this application, the transformer windings include 8 layers, wherein the bottom layer is a transformer that rotates counterclockwise upwards. Original Edge The first turn, and the 7th and 6th layers are transformers that rotate clockwise upwards. Secondary side Two turns, this is the transformer. Secondary side The two layers of windings are connected in parallel to enhance current carrying capacity, and the fifth layer is a transformer that rotates counterclockwise upwards. Original Edge The second turn, the transformer The turns ratio is 2:1. The fourth layer is a transformer that rotates counterclockwise upwards. Original Edge The first turn, and the third and second layers are transformers that rotate clockwise upwards. Secondary side Two turns, this is the transformer. Secondary side The two layers of windings are connected in parallel to enhance current carrying capacity; the first layer is a transformer that rotates counterclockwise upwards. Original Edge The second turn, the transformer The ratio is 2:1.

[0052] In one specific embodiment provided in this application, the voltage of the input power supply, the voltage across the voltage divider capacitor, the voltage across the bridging capacitor, and the voltage across the transformer can be determined based on the voltages of each working circuit in the bridge-type bridging capacitor voltage regulation module circuit. For example:

[0053] in, Indicates the input DC voltage. ( () represents the voltage across the capacitor. Let represent the voltage across the two transformers. By solving the above equations simultaneously, we can obtain the voltage across each capacitor. Assume... , can be obtained , Then through two transformers and Series voltage divider The voltage at the secondary side after passing through a transformer with a turns ratio of 2:1 Finally, a 3:1 conversion is achieved through a current doubler rectifier step-down circuit to output 1V DC power.

[0054] In one specific embodiment provided in this application, each operating cycle of the bridge-type bridging capacitor voltage regulation module circuit includes four stages; in chronological order, In the first stage, one of the first switching transistors in each half-bridge circuit and one of the second switching transistors in each current-doubling rectifier module are turned on, and the other first switching transistor in each half-bridge circuit and the other second switching transistor in each current-doubling rectifier module are turned off. In the second stage, the two first switching transistors included in each half-bridge circuit are turned off, and the two second switching transistors included in each current multiplier rectifier module are turned on. In the third stage, one of the first switching transistors in each half-bridge circuit and one of the second switching transistors in each current-doubling rectifier module are turned off, while the other first switching transistor in each half-bridge circuit and the other second switching transistor in each current-doubling rectifier module are turned on. The switching state in the fourth stage is the same as that in the second stage.

[0055] For example, please refer to Figure 3 It shows a schematic diagram of the current loop structure at different stages of each working cycle provided in one embodiment of this application.

[0056] The first stage is At that moment, the first switching transistor and Second switching transistor and Turn on, first switching transistor and Second switching transistor and Turn off. The circuit containing the primary side of the transformer is called the front-end circuit, and the circuit containing the secondary side is called the back-end circuit. The front-end circuit has three current loops in the first stage. Based on the direction of the current, the first loop is... The second branch loop is The third branch loop is The secondary side has a total of 4 circuits. Since the subsequent stage consists of two identical current-multiplying rectifier circuits, only one circuit will be analyzed here. Similarly, the other circuit can be deduced. The first circuit on the secondary side is... The second branch loop is .

[0057] The second stage is The fourth stage is At that moment, the first switching transistor , , and Turn off, second switch transistor , , and Conduction. The preceding stage has one circuit. The subsequent stage has a total of 4 circuits. ( =5, 6, 7, 8, =1, 2, 3, 4).

[0058] The third stage is At that moment, the first switching transistor and Second switching transistor and Turn off, first switching transistor and Second switching transistor and Conduction. The preceding circuit has three current loops in the first stage. Based on the direction of the current, the first loop is... The second branch loop is The third branch loop is The secondary side has a total of 4 circuits. Since the subsequent stage consists of two identical current-multiplying rectifier circuits, only one circuit will be analyzed here. Similarly, the other circuit can be deduced. The first circuit on the secondary side is... The second branch loop is .

[0059] In one specific embodiment provided in this application, the voltage ripple of the two voltage divider capacitors and the two bridging capacitors can be determined based on the charge balance principle of the two bridging capacitors in steady state.

[0060] For example, two bridging capacitors and Conducted only during the first and third phases, by and Based on the principle of charge balance in steady state, the following relationships are obtained:

[0061] In both the first and third stages of steady-state operation, an equal amount of charge ∆Q flows through. and Because the primary winding current in both stages is... and Because they are shared, there are a total of 2 ∆Q charges flowing through the winding in each stage. ∆Q is calculated in these modes. and Shared total charge ∆Q, due to and The sum of their voltages remains constant, and their ripple voltages are equal. Therefore, calculate them separately. , , and voltage ripple 、 、 and for:

[0062]

[0063]

[0064] in:

[0065] Where D represents the duty cycle of the subsequent current multiplier rectifier. Indicates the duty cycle of the switching transistor. Let n represent the output current and n represent the transformer turns ratio. Based on the continuity of the capacitor voltage, the peak voltage stress of each switching transistor in the preceding stage can be derived as follows:

[0066] Please refer to Figure 4 and Figure 5 , Figure 4 The diagram shows a waveform representation of the control signal, peak current, and peak voltage as a function of duty cycle and switching transistor operating cycle, according to an embodiment of this application. Figure 5 A schematic diagram illustrating the effect of a DC blocking capacitor provided in one embodiment of this application is shown.

[0067] Furthermore, at different stages, each output inductor corresponds to a different equivalent inductance.

[0068] For example, please refer to Figure 6 This illustrates a different stage of output inductor provided in one embodiment of this application. A schematic diagram of the equivalent structure. For example, the equivalent inductance at each stage , , and They are respectively:

[0069]

[0070]

[0071]

[0072] in , M is and The mutual inductance coefficient, D is the duty cycle set in the current multiplier rectifier circuit.

[0073] This application also provides a power supply system for an AI data center acceleration processing unit, the power supply system for the AI ​​data center acceleration processing unit including the bridge-type cross-connect capacitor voltage regulation module circuit as described in any of the above embodiments.

[0074] It is understood that the specific examples in this application are only intended to help those skilled in the art better understand the implementation methods of this application, and are not intended to limit the scope of the invention.

[0075] It is understood that the various implementation methods described in this application can be implemented individually or in combination, and the implementation methods in this application are not limited in this respect.

[0076] Unless otherwise stated, all technical and scientific terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items. The singular forms "a," "the," and "the" as used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0077] The above are merely specific embodiments of this application, but the scope of protection of this invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this invention should be determined by the scope of the claims.

Claims

1. A bridge type across capacitor voltage regulation module circuit, characterized by, The bridge type cross capacitor voltage regulation module circuit comprises a voltage divider module and a transformer module, the voltage divider module comprises an input power supply, two voltage divider capacitors, two groups of half-bridge circuits and two bridge capacitors, and each group of half-bridge circuits comprises two first switch tubes; The positive side of one of the voltage divider capacitors is connected to the positive pole of the input power supply, the negative side of one of the voltage divider capacitors is connected to the positive side of the other voltage divider capacitor, and the negative side of the other voltage divider capacitor is connected to the negative pole of the input power supply; Each group of the half-bridge circuits corresponds to one of the voltage divider capacitors, one end of one of the first switch tubes is connected to the positive side of the voltage divider capacitor, the other end of one of the first switch tubes is connected to one end of the other first switch tube, and the other end of the other first switch tube is connected to the negative side of the voltage divider capacitor; The positive side of one of the bridge capacitors is connected between the two first switch tubes included in one of the half-bridge circuits, the negative side of the other bridge capacitor is connected between the two first switch tubes included in the other half-bridge circuit, and the negative side of one of the bridge capacitors is connected to the positive side of the other bridge capacitor; The same end of the primary side of the transformer module is connected between the two voltage divider capacitors, and the different end of the primary side of the transformer module is connected between the two bridge capacitors.

2. The bridge across the capacitance voltage regulating module circuit according to claim 1, characterized in that, The bridge type cross capacitor voltage regulation module circuit further comprises at least two current doubling rectifier modules, each of which comprises a DC blocking capacitor, two second switch tubes and two output inductors; The same end of the negative side of the transformer module is connected to the positive pole of the DC blocking capacitor, the negative pole of the DC blocking capacitor is connected to one of the second switch tubes and one end of one of the output inductors, the different end of the negative side of the transformer module is connected to the other second switch tube and one end of the other output inductor, and the other ends of the two output inductors are connected.

3. The bridge spanning capacitance voltage regulating module circuit of claim 2, wherein, The transformer module comprises at least two transformers, the number of the transformers is the same as the number of the current doubling rectifier modules, and each of the current doubling rectifier modules corresponds to one of the transformers; The same end of the primary side of the first transformer is connected between the two voltage divider capacitors, the primary sides of the at least two transformers are connected in the order of different end, same end and different end, and the different end of the primary side of the last transformer is connected between the two bridge capacitors.

4. The bridge spanning capacitance voltage regulating module circuit of claim 3, wherein, The bridge type cross capacitor voltage regulation module circuit further comprises an output module, the output module comprises an output capacitor and an electronic load, and one end of the output capacitor is connected to the positive side of the electronic load and the other ends of the two output inductors included in each of the current doubling rectifier modules.

5. The bridge tap capacitor voltage regulation module circuit of claim 3 or 4, wherein, The windings of the at least two transformers are integrated on a same first magnetic core, the first magnetic core comprises three magnetic columns, i.e., two outer columns and one middle column, and the windings of the at least two transformers are concentratedly wound on the middle column.

6. The bridge-type capacitance voltage adjustment module circuit according to any one of claims 2 to 4, characterized by, Each of the current doubling rectifier modules includes two output inductors that are mutually coupled inductors, and the two output inductors of each of the current doubling rectifier modules are integrated in different second magnetic cores.

7. The bridge-type capacitance voltage adjustment module circuit according to any one of claims 1 to 4, characterized by, The negative pole of the input power supply, the other end of the second switch tube and the negative polarity side of the electronic load are grounded.

8. The bridge-type capacitance voltage adjustment module circuit according to any one of claims 1 to 4, characterized by, The first switch tube and the second switch tube are N-channel gallium nitride field effect transistors.

9. The bridge-type capacitance voltage adjustment module circuit according to any one of claims 2 to 4, characterized by, Each working cycle of the bridge across the capacitor voltage regulation module circuit includes four stages; in time sequence, In the first stage, one of the first switch tubes included in each of the half-bridge circuits and one of the second switch tubes included in each of the current doubling rectifier modules are turned on, and the other of the first switch tubes included in each of the half-bridge circuits and the other of the second switch tubes included in each of the current doubling rectifier modules are turned off. In the second stage, the two first switch tubes included in each of the half-bridge circuits are turned off, and the two second switch tubes included in each of the current doubling rectifier modules are turned on. In the third stage, one of the first switch tubes included in each of the half-bridge circuits and one of the second switch tubes included in each of the current doubling rectifier modules are turned off, and the other of the first switch tubes included in each of the half-bridge circuits and the other of the second switch tubes included in each of the current doubling rectifier modules are turned on. The switch tube state in the fourth stage is the same as that in the second stage.

10. A power supply system for an artificial intelligence data center accelerated processing unit, comprising: The power supply system of the artificial intelligence data center acceleration processing unit faces the bridge across the capacitor voltage regulation module circuit as claimed in any one of claims 1-9.

Images