Server board-level power supply control circuit and power supply parallel control device

Abstract

The utility model provides a server board-level power supply control circuit and a power supply parallel control device, and relates to the technical field of power supply circuits. The server board-level power supply control circuit and the power supply parallel control device comprise a power supply control module, a current detection module and a voltage correction module, the power supply control module is connected with the current detection module and the voltage correction module; the current detection module is connected with the voltage correction module; the power supply control module is used for receiving an input voltage and a voltage correction signal output by the voltage correction module, and outputting an output voltage corresponding to a set value; the current detection module is used for detecting working current flowing to the load and outputting detection voltage when the load works based on the output voltage; the voltage correction module is used for receiving the detection voltage, the reference voltage and the common voltage and outputting a voltage correction signal. According to the server board-level power supply control circuit and the power supply parallel control device, the error between the output voltage and the set value is reduced, and the stability of power supply output is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply circuit, and particularly relates to a server board-level power supply control circuit and a power supply parallel control device. BACKGROUND

[0002] The server board-level power supply is a key component in data centers and high-performance computing, and its stability and reliability directly affect the operation efficiency of the entire system. With the increasing power demand of servers, the output capacity of a single power supply has been difficult to meet the high load demand, and therefore, multiple power supplies in parallel have become an important means to improve the output capacity.

[0003] In the prior art, a BUCK power supply architecture is usually adopted to realize conversion from input voltage to output voltage by controlling the on-off of a switch tube; and a power supply control chip adjusts the output voltage by detecting a voltage feedback signal so that the output voltage is stabilized at a set value.

[0004] However, the existing power supply control scheme still has problems such as large actual output voltage deviation, uneven output current, and poor stability during power supply control. CONTENT OF THE INVENTION

[0005] The present application provides a server board-level power supply control circuit and a power supply parallel control device to solve the problems such as large output voltage error, uneven output current, and poor stability during power supply control in the existing power supply control scheme.

[0006] In a first aspect, the present application provides a server board-level power supply control circuit, comprising a power supply control module, a current detection module, and a voltage correction module; the power supply control module is connected with the current detection module and the voltage correction module; the current detection module is connected with the voltage correction module.

[0007] The power supply control module is configured to receive an input voltage and a voltage correction signal output by the voltage correction module, and output an output voltage corresponding to a set value.

[0008] The current detection module is configured to detect a working current flowing to a load when the load works based on the output voltage, and output a detection voltage.

[0009] The voltage correction module is configured to receive the detection voltage, a reference voltage, and a common voltage, and output the voltage correction signal.

[0010] In a possible implementation, the voltage correction module comprises a first operational amplifier assembly, a second operational amplifier assembly, and a third operational amplifier assembly connected in sequence.

[0011] The first operational amplifier assembly is configured to receive the detection voltage and output a detection amplified voltage.

[0012] The second operational amplification component is configured to receive the detection amplification voltage and the reference voltage, and output a target detection voltage;

[0013] The third operational amplification component is configured to receive the target detection voltage and a common voltage, and output a voltage correction signal.

[0014] In a possible implementation, the first operational amplification component includes a first operational amplifier, a first resistor, and a second resistor, and the current detection module includes a current detection resistor;

[0015] The first input end of the first operational amplifier is connected with one end of the current detection resistor, and the second input end of the first operational amplifier is connected with the other end of the current detection resistor;

[0016] One end of the first resistor is connected with the output end of the first operational amplifier, and the other end of the first resistor is connected with one end of the second resistor;

[0017] The other end of the second resistor is grounded;

[0018] The second operational amplification component is connected between the first resistor and the second resistor.

[0019] In a possible implementation, the second operational amplification component includes a third resistor, a second operational amplifier, a fourth resistor, a fifth resistor, and a sixth resistor;

[0020] One end of the third resistor is connected between the first resistor and the second resistor, and is connected with the first input end of the second operational amplifier;

[0021] The other end of the third resistor is connected with the reference voltage output end;

[0022] One end of the fourth resistor is connected with one end of the fifth resistor, and the other end of the fourth resistor is grounded;

[0023] The second input end of the second operational amplifier is connected between the fourth resistor and the fifth resistor, and the output end of the second operational amplification component is connected with the other end of the fifth resistor;

[0024] One end of the sixth resistor is connected between the output end of the second operational amplification component and the fifth resistor, and the other end of the sixth resistor is connected with the third operational amplification component.

[0025] In a possible implementation, the third operational amplification component includes a seventh resistor, an eighth resistor, a ninth resistor, a third operational amplifier, a tenth resistor, an eleventh resistor, and a twelfth resistor;

[0026] The other end of the sixth resistor is connected with one end of the seventh resistor and one end of the eighth resistor;

[0027] The other end of the seventh resistor is connected with the common voltage signal connection end and one end of the tenth resistor;

[0028] The other end of the eighth resistor is connected with one end of the ninth resistor and the first input end of the third operational amplifier;

[0029] The other end of the ninth resistor is grounded;

[0030] The other end of the tenth resistor is connected with the second input end of the third operational amplifier and one end of the eleventh resistor;

[0031] The other end of the eleventh resistor is connected with the output end of the third operational amplifier;

[0032] One end of the twelfth resistor is connected between the eleventh resistor and the output end of the third operational amplifier, and the other end of the twelfth resistor is connected with the power supply control module.

[0033] In a possible implementation, the power supply control module comprises a power supply control component, a power supply conversion component, a power supply output component, and a voltage feedback component;

[0034] The input end of the power supply conversion component is connected with the input voltage end, the output end of the power supply conversion component is connected with the input end of the power supply output component, and the control signal receiving end of the power supply conversion component is connected with the power supply control component;

[0035] The output end of the power supply output component is connected with the load;

[0036] The input end of the voltage feedback component is connected between the output end of the power supply conversion component and the input end of the power supply output component, and the output end of the voltage feedback component is connected with the power supply control component and the voltage correction module;

[0037] The current detection module is connected between the input end of the power supply output component and the to-be-connected point, or the current detection module is connected between the output end of the power supply output component and the load, wherein the to-be-connected point is a connection point formed by connection between the output end of the power supply conversion component, the input end of the power supply output component and the input end of the voltage feedback component.

[0038] In a possible implementation, when the current detection module comprises a current detection resistor, one end of the current detection resistor is connected with the input end of the power supply output component, and the other end of the current detection resistor is connected with the to-be-connected point; the two ends of the current detection resistor are connected with the voltage correction module.

[0039] In a possible implementation, when the current detection module comprises a current detection resistor, one end of the current detection resistor is connected with the load, and the other end of the current detection resistor is connected with the output end of the power supply output component; the two ends of the current detection resistor are connected with the voltage correction module.

[0040] Secondly, this application provides a server board-level power supply parallel control device, including a power control circuit; the power control circuit is the server board-level power control circuit as described in the first aspect and / or various possible embodiments of the first aspect.

[0041] In one possible implementation, the end of the voltage correction module in all power control circuits that receives the common voltage is connected.

[0042] The server board-level power control circuit and power parallel control device provided in this application connect a power control module to a current detection module and a voltage correction module; the current detection module is connected to the voltage correction module; the power control module receives the input voltage and the voltage correction signal output by the voltage correction module, and outputs an output voltage corresponding to the set value; the current detection module detects the working current flowing to the load when the load is operating based on the output voltage, and outputs a detected voltage; the voltage correction module receives the detected voltage, reference voltage, and common voltage, and outputs a voltage correction signal. This means that the power control module can detect the magnitude of the current flowing through its output voltage during operation and convert it into a voltage signal, and then output a voltage correction signal. This allows the power control module to dynamically adjust the input voltage conversion based on the voltage correction signal, reducing the error between the actual output voltage and the set value, adapting to load changes, and improving the stability of the power output. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] Figure 1 This is a schematic diagram of the structure of an existing power control scheme provided in the embodiments of this application;

[0045] Figure 2 A schematic diagram of a server board-level power control circuit provided in an embodiment of this application;

[0046] Figure 3 This is a schematic diagram of the voltage correction module provided in an embodiment of this application;

[0047] Figure 4 The circuit structure diagram of each component in the voltage correction module provided in the embodiments of this application is shown below.

[0048] Figure 5 This is a schematic diagram of the power control module provided in an embodiment of this application;

[0049] Figure 6 A schematic diagram of another server board-level power control circuit provided in an embodiment of this application;

[0050] Figure 7 A structure diagram of a server board-level power supply control circuit provided by an embodiment of the present application;

[0051] Figure 8 A circuit structure diagram of a voltage correction module of all power supply control circuits in a server board-level power supply parallel control device provided by an embodiment of the present application;

[0052] Figure 9 A circuit structure diagram of a server board-level power supply control circuit provided by an embodiment of the present application.

[0053] Explanation of reference numerals:

[0054] 100: power supply control module; 110: power supply control component; 120: power supply conversion component; 130: power supply output component; 140: voltage feedback component;

[0055] 200: current detection module;

[0056] 300: voltage correction module;

[0057] 310: first operational amplifier component; 311: first operational amplifier; 312: first resistor; 313: second resistor;

[0058] 320: second operational amplifier component; 321: third resistor; 322: second operational amplifier; 323: fourth resistor; 324: fifth resistor; 325: sixth resistor; 326: reference voltage output terminal;

[0059] 330: third operational amplifier component; 331: seventh resistor; 332: eighth resistor; 333: ninth resistor; 334: third operational amplifier; 335: tenth resistor; 336: eleventh resistor; 337: twelfth resistor; 338: common voltage signal connection terminal;

[0060] A: one end of a current detection resistor; A1: one end of a current detection resistor corresponding to a first power supply control circuit; A2: one end of a current detection resistor corresponding to a second power supply control circuit;

[0061] B: the other end of the current detection resistor; B1: the other end of the current detection resistor corresponding to the first power supply control circuit; B2: the other end of the current detection resistor corresponding to the second power supply control circuit;

[0062] C: target detection voltage detection terminal; C1: target detection voltage detection terminal corresponding to the first power supply control circuit; C2: target detection voltage detection terminal corresponding to the second power supply control circuit;

[0063] D: Voltage correction signal output terminal; D1: Voltage correction signal output terminal corresponding to the first power control circuit; D2: Voltage correction signal output terminal corresponding to the second power control circuit;

[0064] E: Connection point; F: Load; R: Current sensing resistor;

[0065] Q1: First switching transistor; Q2: Second switching transistor; L: Inductor; VIN: Input voltage terminal; Vout: Output voltage terminal; V FB Voltage feedback signal; IC Control Logic: power control chip.

[0066] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0067] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0068] Figure 1 This is a schematic diagram of the structure of an existing power control scheme provided in the embodiments of this application, such as... Figure 1 As shown, in the prior art, a BUCK power supply is used as the basic architecture. The power control chip IC Control Logic controls the switching of the first switch Q1 and the second switch Q2 to realize the conversion between the input voltage VIN and the output voltage Vout. The inductor L stores energy when the switches are on and releases energy when they are off, thus playing a role in energy transfer. Simultaneously, the power control chip detects the voltage feedback signal V... FB This method adjusts the output voltage to stabilize it at the set value. However, this approach still suffers from problems such as large deviations in actual output voltage, uneven output current, and poor stability during power control.

[0069] Based on this, when the circuit structure using the scheme is used for parallel connection of different power supplies, even if the output voltages of the multiple power supplies are set to the same value, due to the discreteness of the parameters of the components of each power supply and the difference of the control loops, the deviation of the actual output voltages is larger. Such deviation will cause uneven distribution of the output current when in parallel connection, some power supplies can be overloaded, while other power supplies are in a light load state, thereby causing problems such as system instability, loop interference, even oscillation and power failure. In order to solve the above problems, the prior art usually uses a high-precision control chip with parallel connection function, but this will cause a significant increase in cost, which is not practical.

[0070] In view of the above technical problems, the embodiment of the present application provides a server board-level power supply control circuit and a power supply parallel connection control device. The power supply control module is connected with the current detection module and the voltage correction module; the current detection module is connected with the voltage correction module; the power supply control module receives the input voltage and the voltage correction signal output by the voltage correction module, and outputs an output voltage corresponding to a set value; the current detection module detects the working current flowing to the load when the load works based on the output voltage, and outputs a detection voltage; the voltage correction module receives the detection voltage, a reference voltage and a common voltage, and outputs a voltage correction signal. The means that the voltage correction module receives the detection voltage, a reference voltage and a common voltage, and outputs a voltage correction signal, can detect the current size of the output voltage of the power supply control module when working and convert it into a voltage signal, and then output the voltage correction signal through the voltage correction module, so that the power supply control module can dynamically adjust the conversion of the input voltage based on the voltage correction signal, reduce the error between the actual output voltage and the set value, adapt to load changes, improve the stability of the power supply output, and correspondingly, when there is a demand for parallel connection of different power supplies to provide load power supply service in the server board-level power supply, each power supply can be connected using the server board-level power supply control circuit provided by the embodiment of the present application to form a power supply parallel connection control device. The device can detect the load current in real time and output a detection voltage, so as to understand the current demand of the load, and adjust the power supply output in time, so as to realize stable parallel connection of multiple power supplies and load balancing.

[0071] The technical scheme of the present application and how the technical scheme of the present application solves the above technical problems will be described in detail in the specific embodiments below. The specific embodiments below can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0072] Reference Figure 2This application provides a server board-level power control circuit, including a power control module 100, a current detection module 200, and a voltage correction module 300. The power control module 100 is connected to the current detection module 200 and the voltage correction module 300. The current detection module 200 is connected to the voltage correction module 300. The power control module 100 is used to receive the input voltage and the voltage correction signal output by the voltage correction module, and output an output voltage corresponding to a set value. The current detection module 200 is used to detect the operating current flowing to the load when the load is operating based on the output voltage, and output a detected voltage. The voltage correction module 300 is used to receive the detected voltage, the reference voltage, and the common voltage, and output a voltage correction signal.

[0073] The power control module 100 is the core control component of the entire circuit, responsible for receiving and processing voltage signals. On one hand, it receives the input voltage, providing the initial power input to the circuit; on the other hand, it receives the voltage correction signal output from the voltage correction module 300, adjusts it accordingly, and outputs the corresponding set value to meet the specific voltage requirements of the load. The power control module 100 can be configured as a single power supply in a server board-level power supply, or as any power supply in a multi-power supply system connected in parallel. For example, the power control module 100 can be... Figure 1 The circuit structure in the power control scheme shown.

[0074] The current detection module 200 is used to monitor the output current in the circuit. When the load operates based on the voltage output by the power control module 100, this module can detect the operating current flowing to the load in real time and convert the detected current information into a detection voltage output for further processing by the subsequent voltage correction module 300, providing a basis for judging the operating status of the load and the stability of the circuit.

[0075] The voltage correction module 300 is used to receive the detection voltage output by the current detection module 200, as well as the reference voltage and common voltage. Through the structure of the voltage correction module 300, these voltage signals are processed and a voltage correction signal is output to the power control module 100, thereby realizing the precise adjustment of the power supply output voltage, making the output voltage more stable and more in line with the working requirements of the load.

[0076] The addition of a current detection module enables real-time monitoring of the operating current, timely detection of load anomalies, and protection of circuit safety. The added voltage correction module can automatically output a voltage correction signal based on the detected voltage to adjust the output voltage and ensure its stability. The collaborative work of the three modules forms a closed-loop control circuit, which improves the stability and reliability of the power control circuit, reduces the occurrence of failures, extends the service life of the server, and reduces maintenance costs.

[0077] In some embodiments, seeFigure 3 The voltage correction module 300 comprises a first operational amplification component 310, a second operational amplification component 320 and a third operational amplification component 330 connected in sequence; the first operational amplification component 310 is configured to receive a detection voltage and output a detection amplified voltage; the second operational amplification component 320 is configured to receive the detection amplified voltage and a reference voltage and output a target detection voltage; and the third operational amplification component 330 is configured to receive the target detection voltage and a common voltage and output a voltage correction signal.

[0078] It should be noted that the first operational amplification component 310 is configured to amplify the detection voltage output by the current detection module, enhance the signal strength of the detection voltage, and output a detection amplified voltage, so that the subsequent circuit can process the signal more clearly and accurately.

[0079] The second operational amplification component 320 is configured to receive the detection amplified voltage output by the first operational amplification component 310, compare and analyze the detection amplified voltage with the reference voltage, and output a target detection voltage that can more accurately reflect the deviation of the current circuit state from the ideal state, thereby providing a key basis for subsequent voltage correction.

[0080] The third operational amplification component 330 is configured to receive the target detection voltage output by the second operational amplification component 320, combine the target detection voltage with the common voltage for comprehensive operation and amplification, and finally output a voltage correction signal, which is fed back to the power supply control module to realize accurate correction of the output voltage.

[0081] By sequentially amplifying the detection voltage, comparing and processing the detection voltage with the reference voltage, and combining the detection voltage with the common voltage for comprehensive operation through the three operational amplification components, a precise voltage correction signal is output, thereby realizing automatic and accurate adjustment of the output voltage, effectively compensating for voltage deviation caused by changes in load and other factors, ensuring that the output voltage is stable around the set value, significantly improving the stability and reliability of the server board-level power supply system, and ensuring efficient operation of the server components under stable voltage.

[0082] In some embodiments, referring to Figure 4 The first operational amplification component 310 comprises a first operational amplifier 311, a first resistor 312 and a second resistor 313, and the current detection module comprises a current detection resistor; a first input end of the first operational amplifier 311 is connected to one end A of the current detection resistor, and a second input end of the first operational amplifier 311 is connected to the other end B of the current detection resistor; one end of the first resistor 312 is connected to an output end of the first operational amplifier 311, and the other end of the first resistor 312 is connected to one end of the second resistor 313; the other end of the second resistor 313 is grounded; and the second operational amplification component 320 is connected between the first resistor 312 and the second resistor 313.

[0083] In the structure, the first operational amplifier 311 is the core device of the first operational amplifier assembly 310, which has two input ends connected to the two ends A and B of the current detection resistor, and can receive and amplify the voltage difference (corresponding to the detection voltage) between the two ends of the current detection resistor. The detection voltage can reflect the working current flowing to the load, and the first operational amplifier 311 amplifies the weak voltage difference signal so that the subsequent circuit can better process and utilize the signal.

[0084] The first resistor 312 and the second resistor 313 together constitute a voltage dividing circuit, which is used for further processing and adjusting the amplified signal output by the first operational amplifier 311, and also plays a role in limiting current and stabilizing the signal.

[0085] The weak voltage difference between the two ends of the current detection resistor is amplified by the first operational amplifier 311 to enhance the signal reflecting the working current of the load, so that the subsequent circuit can more accurately acquire and process the signal; the voltage dividing circuit composed of the first resistor 312 and the second resistor 313 adjusts and stabilizes the amplified signal, ensuring that the detection amplified voltage output to the second operational amplifier assembly 320 is accurate and reliable.

[0086] In some embodiments, referring to Figure 4 , the second operational amplifier assembly 320 includes a third resistor 321, a second operational amplifier 322, a fourth resistor 323, a fifth resistor 324, and a sixth resistor 325; one end of the third resistor 321 is connected between the first resistor 312 and the second resistor 313, and is connected with the first input end of the second operational amplifier 322; the other end of the third resistor 321 is connected with the reference voltage output end 326; one end of the fourth resistor 323 is connected with one end of the fifth resistor 324, and the other end of the fourth resistor 323 is grounded; the second input end of the second operational amplifier 322 is connected between the fourth resistor 323 and the fifth resistor 324, and the output end of the second operational amplifier assembly 320 is connected with the other end of the fifth resistor 324; one end of the sixth resistor 325 is connected between the output end of the second operational amplifier assembly 320 and the fifth resistor 324, and the other end of the sixth resistor 325 is connected with the third operational amplifier assembly 330.

[0087] Among them, the third resistor 321 is used to further combine (such as voltage addition) the detection amplified voltage output by the first operational amplifier assembly with the reference voltage, to provide a suitable input signal for the second operational amplifier 322, so as to realize further processing of the signal.

[0088] It should be noted that the second operational amplifier 322 receives the signal processed by the third resistor 321 and the signal obtained by voltage division of the fourth resistor 323 and the fifth resistor 324. The two input signals are amplified by the second operational amplifier 322, and the target detection voltage reflecting the difference between the current detection voltage and the reference voltage is output.

[0089] The fourth resistor 323 provides a suitable reference potential for the second input terminal of the second operational amplifier 322, thereby affecting the output of the second operational amplifier 322; the fifth resistor 324 cooperates with the fourth resistor 323 in voltage division, one end of which is connected to the fourth resistor 323, and the other end is connected to the output terminal of the second operational amplifier 322, forming a feedback loop for adjusting the gain and stability of the second operational amplifier 322, and ensuring the accuracy of the output signal.

[0090] The sixth resistor 325 can play a role in isolation and buffering, preventing the output of the second operational amplifier assembly 320 from being affected by the subsequent circuit, and at the same time can appropriately adjust the output target detection voltage to better adapt to the input requirements of the third operational amplifier assembly 330.

[0091] Through the cooperative work of various resistors and the second operational amplifier 322, the detection amplification voltage output by the first operational amplifier assembly 310 is accurately compared and amplified with the reference voltage, so as to accurately output the target detection voltage, provide a key signal for further processing of the third operational amplifier assembly 330, and help the entire voltage correction module to output a more accurate voltage correction signal, so that the server board-level power supply control circuit can more stably and accurately control the output voltage, and ensure the stable operation of the server.

[0092] In some embodiments, referring to Figure 4 , the third operational amplifier assembly 330 includes a seventh resistor 331, an eighth resistor 332, a ninth resistor 333, a third operational amplifier 334, a tenth resistor 335, an eleventh resistor 336, and a twelfth resistor 337; the other end of the sixth resistor 325 is connected to one end of the seventh resistor 331 and one end of the eighth resistor 332; the other end of the seventh resistor 331 is connected to a common voltage signal connection end 338 and one end of the tenth resistor 335; the other end of the eighth resistor 332 is connected to one end of the ninth resistor 333 and the first input terminal of the third operational amplifier 334; the other end of the ninth resistor 333 is grounded; the other end of the tenth resistor 335 is connected to the second input terminal of the third operational amplifier 334 and one end of the eleventh resistor 336; the other end of the eleventh resistor 336 is connected to the output terminal of the third operational amplifier 334; one end of the twelfth resistor 337 is connected between the eleventh resistor 336 and the output terminal of the third operational amplifier 334, and the other end of the twelfth resistor 337 is connected to the power supply control module.

[0093] The seventh resistor 331 is used to introduce the common voltage signal into the circuit and mix it with the target detection voltage (i.e. the voltage corresponding to the target detection voltage detection end point C) to a certain extent, so as to provide a suitable input signal for the subsequent operational amplifier.

[0094] The eighth resistor 332 is used to transmit the target detection voltage signal to the third operational amplifier, and at the same time, it performs impedance matching and current limiting on the signal. The ninth resistor 333 cooperates with the eighth resistor 332 to provide a suitable bias voltage and input impedance for the first input end of the third operational amplifier.

[0095] The third operational amplifier 334 is the core device of the third operational amplification component 330. It receives the target detection voltage and the common voltage signal processed by the seventh resistor 331, the eighth resistor 332 and the ninth resistor 333, and compares, operates and amplifies the two signals, and outputs a signal used to correct the output voltage of the power supply.

[0096] The tenth resistor 335 is used to transmit the common voltage signal to the second input end of the third operational amplifier, and at the same time, it participates in determining the input condition of the operational amplifier. The eleventh resistor 336 is connected between the output end and the second input end of the third operational amplifier 334, forming a feedback loop. By adjusting the feedback coefficient, the gain and stability of the third operational amplifier 334 can be controlled, and the accuracy and reliability of the output signal can be ensured.

[0097] It should be noted that the other end of the twelfth resistor 337 is connected with the power supply control module through the voltage correction signal output end D. It can play the role of isolation and buffering, preventing the power supply control module from affecting the output of the third operational amplifier 334, and at the same time, it can properly adjust the output voltage correction signal to better adapt to the input requirements of the power supply control module.

[0098] Through the cooperative work of various resistors and the third operational amplifier, the target detection voltage output by the second operational amplification component is accurately compared and amplified with the common voltage signal. The resistors play a role in signal transmission, impedance matching, bias setting and feedback adjustment, etc., to ensure that the third operational amplifier can accurately output the voltage correction signal. The isolation and buffering effect of the twelfth resistor ensures that the signal can be stably and accurately transmitted to the power supply control module.

[0099] In some embodiments, please refer to Figure 2 , Figure 5 , Figure 6 , Figure 7The power supply control module 100 comprises a power supply control component 110, a power supply conversion component 120, a power supply output component 130, and a voltage feedback component 140. The input end of the power supply conversion component 120 is connected with the input voltage end. The output end of the power supply conversion component 120 is connected with the input end of the power supply output component 130. The control signal receiving end of the power supply conversion component 120 is connected with the power supply control component 110. The output end of the power supply output component 130 is connected with the load. The input end of the voltage feedback component 140 is connected between the output end of the power supply conversion component 120 and the input end of the power supply output component 130. The output end of the voltage feedback component 140 is connected with the power supply control component 110 and the voltage correction module 300. The current detection module 200 is connected between the input end of the power supply output component 130 and the to-be-connected point E, or the current detection module 200 is connected between the output end of the power supply output component 130 and the load F. The to-be-connected point E is a connection point formed by the connection between the output end of the power supply conversion component 120, the input end of the power supply output component 130, and the input end of the voltage feedback component 140.

[0100] It can be understood that the structure shown in the embodiments of the present application does not constitute a specific limitation on the power supply control module 100. In other embodiments of the present application, the power supply control module 100 can comprise more or fewer components than shown (for example, the voltage feedback component 140 is omitted, or the voltage feedback component 140 is combined with the power supply conversion component 120 into a new conversion component), or some components are combined, or some components are split, or different component arrangements, as long as the power supply control can be realized, the input voltage can be converted, and the output voltage corresponding to the set value can be outputted. The components shown can be realized by hardware, software, or a combination of software and hardware.

[0101] Through the cooperative work of the power supply control component, the power supply conversion component, the power supply output component, and the voltage feedback component, accurate control and stable adjustment of the power supply output voltage are realized.

[0102] In some embodiments, referring to Figure 6 When the current detection module comprises a current detection resistor R, one end A of the current detection resistor R is connected with the input end of the power supply output component 130, and the other end B of the current detection resistor R is connected with the to-be-connected point E. The two ends A and B of the current detection resistor R are connected with the voltage correction module 300.

[0103] This structure can detect the current condition before the power supply output voltage is directly outputted to the load after conversion, can perceive the possible current abnormality in the power supply conversion process in advance, can timely feedback and adjust the output of the power supply control module through the voltage correction module, can avoid the unstable power supply to the load due to the problem of the power supply conversion link, and can guarantee the reliability of the power supply conversion process.

[0104] In some embodiments, please refer to Figure 7 When the current detection module includes a current detection resistor R, one end A of the current detection resistor R is connected with the load F, and the other end B of the current detection resistor R is connected with the output end of the power output component 130; the two ends A and B of the current detection resistor R are connected with the voltage correction module 300.

[0105] In this structure, the actual working current flowing to the load can be directly and accurately detected, and the current change of the load itself, such as load short circuit, overload, etc., can be found in time, so that the voltage correction module can quickly respond and feedback to the power control module to adjust the output, accurately meet the real-time current demand of the load, and enhance the stability and safety of the power supply to the load, effectively protecting the normal operation of the load.

[0106] When there is a demand for multiple power supplies (same or different types of power supplies) to be connected in parallel to provide load power supply services in a server board-level power supply, the embodiments of the present application also provide a server board-level power supply parallel control device, which includes a power control circuit; the power control circuit is the server board-level power supply control circuit of the first aspect and / or various possible embodiments of the first aspect.

[0107] It should be noted that by connecting the voltage correction modules of each power control circuit, the parallel connection of multiple power supplies can be realized, and further, after the voltage correction modules are connected, the detection voltage information in each circuit can be shared, so that the output voltage and output current of a certain power supply circuit can be automatically adjusted based on the detection voltage.

[0108] The device can detect the load current in real time and output the detection voltage, so as to understand the current demand of the load and facilitate timely adjustment of the power output, so as to realize stable parallel connection of multiple power supplies and load balancing.

[0109] In some embodiments, one end of the voltage correction module of all power control circuits for receiving a common voltage is connected.

[0110] Please refer to Figure 8 , one end of the voltage correction module for receiving a common voltage is the common voltage signal connection end 338 shown in Figure 8 .

[0111] Wherein, A1 is one end of the current detection resistor corresponding to the first power control circuit; B1 is the other end of the current detection resistor corresponding to the first power control circuit; C1 is the target detection voltage detection end point corresponding to the first power control circuit; D1 is the voltage correction signal output end corresponding to the first power control circuit. The voltage correction module corresponding to the first power control circuit is represented by voltage correction module 1.

[0112] A2 is one end of the current detection resistor corresponding to the second power supply control circuit; B2 is the other end of the current detection resistor corresponding to the second power supply control circuit; C2 is the target detection voltage detection end point corresponding to the second power supply control circuit; D2 is the voltage correction signal output end corresponding to the second power supply control circuit. The voltage correction module corresponding to the second power supply control circuit is represented by voltage correction module 2.

[0113] By connecting one end of the voltage correction module of all power supply control circuits receiving the common voltage, the cooperative work and precise regulation of the multi-power supply control circuit can be realized. The common voltage provides a unified reference for the voltage correction module of each power supply control circuit, so that each circuit is based on the same standard when correcting the output voltage, thereby enhancing the consistency and stability of the output voltage.

[0114] When the load changes or abnormalities occur, each power supply control circuit can quickly adjust the output voltage through the voltage correction module according to the common voltage and the current and voltage detected by itself, thereby avoiding the problem of uneven current caused by the difference in output voltage, improving the overall efficiency and reliability of the power supply system, and ensuring that each component of the server board can obtain stable and balanced power supply, thereby ensuring the stable operation of the server.

[0115] Therefore, in the application process, the BUCK power supply is taken as the basic structure of the power supply control module, and a circuit structure diagram of a server board-level power supply control circuit is provided to describe the working process of the corresponding server board-level power supply control circuit and the power supply parallel control device of the embodiment of the application, as shown in Figure 9 The current detection resistor R is connected between the input end of the power supply output component and the to-be-connected point. When the load starts to work based on the voltage output by the output voltage end, the current flows from the power supply output to the load, and the current direction on R is from left to right, which will cause a voltage drop on R. The voltages at both ends (A and B) of R can be denoted as V A and V B , respectively. Then, the voltages at both ends of the current detection resistor R are amplified by the first operational amplifier 311 in the voltage correction module, and after amplification, the reference voltage (the voltage corresponding to the reference voltage output end 326) and the detected amplified voltage are added by the second operational amplifier 322 to obtain the target detection voltage (the voltage corresponding to the target detection voltage detection end point C). When there is a voltage difference between the target detection voltage and the common voltage (the voltage corresponding to the common voltage signal connection end 338), a certain proportional feedback will be fed back to the third operational amplifier 334, and a voltage correction signal (the signal corresponding to the voltage correction signal output end D) will be output. The voltage correction signal output end D and the voltage feedback signal in the voltage control module are connected together to form the voltage feedback signal of the entire power supply control circuit, and finally the voltage feedback signal is fed back to the power supply control chip IC ControlLogic in the voltage control module to adjust the output voltage.

[0116] Based on this, when two power supplies need to be connected in parallel, only the common voltage signal connection end 338 of each power supply control circuit needs to be connected together to achieve the parallel connection of multiple power supplies, forming a server board-level power supply parallel control device; if three or even more power supplies need to be connected in parallel, it is also the same common voltage signal connection end 338. Taking the parallel connection of two power supplies as an example, please refer to Figure 8 When the load of the two power supply control circuits is balanced, the target detection voltage of C1 and C2 is basically equal, and the voltage correction signal of D1 and D2 does not need to correct the voltage feedback signal of the original circuit (BUCK power supply control module). When the output current of the first power supply control circuit suddenly increases, the difference (detection voltage) between A1 and B1 increases, and after being amplified by the amplifier, the target detection voltage of C1 also increases, then the voltage difference between the seventh resistor 331 in the voltage correction module 1 corresponding to the first power supply control circuit increases, the voltage correction signal of D1 will increase according to the pre-set proportion and be superimposed on the voltage feedback signal of the power supply control module in the first power supply control circuit, and the power supply control module in the first power supply control circuit will control the power device to reduce the energy from input to output; in this process, since the target detection voltage of C1 increases, the common voltage of the common voltage signal connection end 338 increases, the voltage difference between the seventh resistor 331 in the voltage correction module 2 corresponding to the second power supply control circuit decreases, the voltage correction signal of D2 will decrease according to the pre-set proportion and be superimposed on the voltage feedback signal of the power supply control module in the second power supply control circuit, and the power supply control module in the second power supply control circuit will control the power device to increase the energy from input to output, so as to automatically adjust based on the voltage correction module, achieve the purpose of power energy sharing, realize the power balance between circuits, and reduce the cost of server board-level power supply parallel control.

[0117] Those skilled in the art will readily conceive other embodiments of the application upon considering the specification and practicing the utility model disclosed herein. The application is intended to cover any variations, uses, or adaptations of the application following the general principles thereof and including those not specifically disclosed herein which are obvious to those skilled in the art. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the application are indicated by the following claims.

[0118] It should be understood that the application is not limited to the precise construction which has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the application is limited only by the claims which follow.

Claims

1. A server board level power control circuit, comprising: The power supply control module, the current detection module and the voltage correction module are connected; the current detection module and the voltage correction module are connected; The power supply control module is used for receiving an input voltage and a voltage correction signal output by the voltage correction module, and outputting an output voltage corresponding to a set value; The current detection module is used for detecting a working current flowing to the load when the load works based on the output voltage, and outputting a detection voltage; The voltage correction module is used for receiving the detection voltage, a reference voltage and a common voltage, and outputting a voltage correction signal.

2. The circuit of claim 1, wherein, The voltage correction module comprises a first operational amplifier assembly, a second operational amplifier assembly and a third operational amplifier assembly connected in sequence; The first operational amplifier assembly is used for receiving the detection voltage and outputting a detection amplified voltage; The second operational amplifier assembly is used for receiving the detection amplified voltage and the reference voltage and outputting a target detection voltage; The third operational amplifier assembly is used for receiving the target detection voltage and the common voltage and outputting the voltage correction signal.

3. The circuit of claim 2, wherein, The first operational amplifier assembly comprises a first operational amplifier, a first resistor and a second resistor, and the current detection module comprises a current detection resistor; A first input end of the first operational amplifier is connected with one end of the current detection resistor, and a second input end of the first operational amplifier is connected with the other end of the current detection resistor; One end of the first resistor is connected with an output end of the first operational amplifier, and the other end of the first resistor is connected with one end of the second resistor; The other end of the second resistor is grounded; The second operational amplifier assembly is connected between the first resistor and the second resistor.

4. The circuit of claim 3, wherein, The second operational amplifier assembly comprises a third resistor, a second operational amplifier, a fourth resistor, a fifth resistor and a sixth resistor; One end of the third resistor is connected between the first resistor and the second resistor and connected with a first input end of the second operational amplifier; The other end of the third resistor is connected with a reference voltage output end; One end of the fourth resistor is connected with one end of the fifth resistor, and the other end of the fourth resistor is grounded; A second input end of the second operational amplifier is connected between the fourth resistor and the fifth resistor, and an output end of the second operational amplifier assembly is connected with the other end of the fifth resistor; One end of the sixth resistor is connected between the output end of the second operational amplifier assembly and the fifth resistor, and the other end of the sixth resistor is connected with the third operational amplifier assembly.

5. The circuit of claim 4, wherein, The third operational amplifier assembly comprises a seventh resistor, an eighth resistor, a ninth resistor, a third operational amplifier, a tenth resistor, an eleventh resistor and a twelfth resistor; The other end of the sixth resistor is connected with one end of the seventh resistor and one end of the eighth resistor; The other end of the seventh resistor is connected with a common voltage signal connection end and one end of the tenth resistor; The other end of the eighth resistor is connected with one end of the ninth resistor and a first input end of the third operational amplifier; The other end of the ninth resistor is grounded; Another end of the tenth resistor is connected with a second input end of the third operational amplifier, one end of the eleventh resistor; Another end of the eleventh resistor is connected with an output end of the third operational amplifier; One end of the twelfth resistor is connected between the eleventh resistor and the output end of the third operational amplifier, and another end of the twelfth resistor is connected with the power supply control module.

6. The circuit of claim 1, wherein, The power supply control module comprises a power supply control component, a power supply conversion component, a power supply output component and a voltage feedback component; An input end of the power supply conversion component is connected with an input voltage end, an output end of the power supply conversion component is connected with an input end of the power supply output component, and a control signal receiving end of the power supply conversion component is connected with the power supply control component; An output end of the power supply output component is connected with a load; An input end of the voltage feedback component is connected between an output end of the power supply conversion component and an input end of the power supply output component, and an output end of the voltage feedback component is connected with the power supply control component and the voltage correction module; The current detection module is connected between an input end of the power supply output component and a to-be-connected point, or the current detection module is connected between an output end of the power supply output component and the load, wherein the to-be-connected point is a connection point formed by connecting between an output end of the power supply conversion component, an input end of the power supply output component and an input end of the voltage feedback component.

7. The circuit of claim 6, wherein, When the current detection module comprises a current detection resistor, one end of the current detection resistor is connected with the input end of the power supply output component, and another end of the current detection resistor is connected with the to-be-connected point; both ends of the current detection resistor are connected with the voltage correction module.

8. The circuit of claim 6, wherein, When the current detection module comprises a current detection resistor, one end of the current detection resistor is connected with the load, and another end of the current detection resistor is connected with the output end of the power supply output component; both ends of the current detection resistor are connected with the voltage correction module.

9. A server board level power paralleling control apparatus, comprising: The server board-level power supply control circuit comprises a plurality of power supply control circuits.

10. The server board level power-shedding control apparatus of claim 9, wherein, One end of the voltage correction module of all power supply control circuits for receiving a common voltage is connected.

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