Server board burning prevention system and working method

Abstract

The invention discloses a server board burning prevention system and a working method. The server board burning prevention system comprises a power source, a power supply circuit, a load circuit, a first sampling unit, a second sampling unit, a comparison unit and a control unit. The power supply, the power supply circuit and the load circuit are connected in sequence; one end of the first sampling unit is arranged on the power supply line and the other end is connected to the comparison unit; one end of the second sampling unit is arranged on the load line, and the other end is connected to the comparison unit; the control unit is connected to the comparison unit and the power supply. The first sampling unit and the second sampling unit are used for sampling the power supply line and the load line respectively, the comparison unit is used for comparing and analyzing the sampling result, whether the current is abnormal or not can be accurately judged in real time, and compared with a traditional single threshold value overcurrent protection mode, the device has higher accuracy and reliability, and the reliability of the device is improved. And a power supply can be quickly cut off, so that the server is effectively prevented from being burnt due to abnormal current, and stable operation of the server is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of server power supply technology, and in particular to a server anti-burn-out board system and its working method. Background Technology

[0002] During server operation, server circuit boards are at risk of burning out due to various reasons such as abnormal current and load short circuits. Once a server circuit board burns out, it not only causes server downtime and business interruption, resulting in significant economic losses, but may also damage critical data stored on the server. Currently, existing server protection measures suffer from problems such as untimely response and inaccurate protection when dealing with complex current changes and load anomalies. For example, some simple overcurrent protection devices only activate when the current exceeds a fixed threshold, failing to accurately determine the current difference between the power supply line and the load line. They are ill-equipped to provide effective protection against instantaneous current fluctuations or partial short circuits in the load line, thus failing to fundamentally prevent server circuit board burnout. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing server burn-out protection systems, such as untimely response and inaccurate protection, and to provide a server burn-out protection system and its working method.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] In a first aspect, embodiments of the present invention provide a server anti-burn-in system, comprising: a power supply, a power supply line, a load line, a first sampling unit, a second sampling unit, a comparison unit, and a control unit; the power supply, the power supply line, and the load line are connected in sequence; one end of the first sampling unit is disposed on the power supply line, and the other end is connected to the comparison unit; one end of the second sampling unit is disposed on the load line, and the other end is connected to the comparison unit; the control unit is connected to the comparison unit and the power supply.

[0006] In one embodiment, an amplifier unit is connected between the second sampling unit and the comparison unit.

[0007] In one embodiment, the first sampling unit includes a first resistor and a first current sensing amplifier; the first resistor is connected in series in the power supply line; the first current sensing amplifier is connected across the two ends of the first resistor and connected to the comparison unit.

[0008] In one embodiment, the second sampling unit includes a second resistor and a second current sensing amplifier; the second resistor is connected in series in the load line, and the second current sensing amplifier is connected across the two ends of the second resistor.

[0009] In one embodiment, a VR power conversion unit is provided between the power supply line and the load line.

[0010] In one embodiment, the load lines are provided in multiple ways and are arranged in parallel. The second sampling unit is provided corresponding to the load lines, and all the second sampling units are combined and connected to the amplifier unit.

[0011] In one embodiment, the second sampling unit further includes a third resistor, the two ends of which are respectively connected to the second current sensing amplifier and the amplifier unit.

[0012] In one embodiment, the control unit includes a control chip connected to the comparison unit and the power supply.

[0013] In one embodiment, the control unit further includes a BMC, which is connected to the control chip.

[0014] Secondly, embodiments of the present invention also provide a method for operating a server burn-out protection system, applicable to the server burn-out protection system described above, the method comprising:

[0015] The power supply provides power to the load line through the power supply line;

[0016] The first sampling unit samples the power supply line and obtains the first sampling result;

[0017] The second sampling unit samples the load line and obtains a second sampling result;

[0018] The comparison unit acquires and compares the first sampling result and the second sampling result, and obtains the comparison result;

[0019] When the comparison result is that the first sampling result is greater than the second sampling result, the comparison unit triggers the control unit;

[0020] The control unit controls the power supply to shut down, and the power supply stops supplying power to the load line.

[0021] The server burn-out protection system and working method of the present invention have the following advantages compared with the prior art: by setting a first sampling unit and a second sampling unit to sample the power supply line and the load line respectively, and using a comparison unit to compare and analyze the sampling results, it is possible to determine whether the current is abnormal in real time and accurately. Compared with the traditional single threshold overcurrent protection method, it has higher accuracy and reliability, and can quickly cut off the power supply, effectively preventing the server from burning out due to abnormal current, and ensuring the stable operation of the server.

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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.

[0024] Figure 1 A schematic diagram of the server burn-out protection system provided in this embodiment of the invention. Figure 1 ;

[0025] Figure 2 A schematic diagram of the server burn-out protection system provided in this embodiment of the invention. Figure 2 ;

[0026] Figure 3 This is a flowchart illustrating the working method of the server anti-burn-in board provided in an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0034] See Figures 1 to 2As shown, this embodiment of the invention provides a server anti-burn-out board system, including: a power supply J1, a power supply line 1, a load line 2, a first sampling unit 3, a second sampling unit 4, a comparison unit U2, and a control unit 5; the power supply J1, the power supply line 1, and the load line 2 are connected in sequence; one end of the first sampling unit 3 is disposed on the power supply line 1, and the other end is connected to the comparison unit U2; one end of the second sampling unit 4 is disposed on the load line 2, and the other end is connected to the comparison unit U2; the control unit 5 is connected to the comparison unit U2 and the power supply J1.

[0035] Specifically, the server burn-out prevention system in this embodiment is based on the principle of current balance monitoring. Power supply J1 supplies power to load line 2 through power supply line 1. Under normal circumstances, the current output by power supply line 1 should be approximately equal to the current consumed by load line 2. The first sampling unit 3 and the second sampling unit 4 sample the current of power supply line 1 and load line 2 in real time, respectively, and transmit the sampling results to the comparison unit U2. The comparison unit U2 compares the two sampling results. If the difference exceeds the normal range, it indicates a possible abnormal situation such as current leakage or load short circuit. In this case, the comparison unit U2 triggers the control unit 5, which controls power supply J1 to shut off to protect the server circuit board. This embodiment enables real-time, accurate, and reliable monitoring of the current status of power supply line 1 and load line 2, timely detection of current abnormalities, and rapid disconnection of power supply J1, effectively preventing the server from burning out due to current abnormalities and ensuring the stable operation of the server.

[0036] In one specific embodiment, an amplifier unit U1 is connected between the second sampling unit 4 and the comparison unit U2.

[0037] Specifically, the core function of amplifier unit U1 is to precisely amplify the current signal output by the second sampling unit 4 through a flexibly configurable amplification factor. This amplification is not simply signal enhancement, but rather converts the current signal sampled by the second sampling unit 4 into a maximum safe threshold signal corresponding to the input current, providing a precise reference for comparator unit U2. By reasonably setting the amplification factor, the amplified signal can accurately reflect the maximum allowable input current value of power supply line 1 under safe operating conditions of load line 2, allowing comparator unit U2 to clearly define the boundary between normal power supply and overcurrent protection.

[0038] This amplification design, based on the maximum safe threshold of output current conversion, makes the judgment benchmark of the comparison unit U2 more closely match the actual operating requirements of the load, avoiding the misjudgment or lag problems that may occur with traditional fixed threshold protection. The adjustable amplification factor allows the system to adapt to the safety threshold requirements under different load scenarios. Whether under light or heavy load conditions, the protection range can be accurately set, significantly improving the flexibility and reliability of overcurrent protection and further strengthening the safety protection barrier of server lines.

[0039] In one specific embodiment, the first sampling unit 3 includes a first resistor R1 and a first current sensing amplifier U5; the first resistor R1 is connected in series in the power supply line 1; the first current sensing amplifier U5 is connected across the first resistor R1 and connected to the comparison unit U2.

[0040] Specifically, the first sampling unit 3 employs a combination of a first resistor R1 and a first current sensing amplifier U5. According to Ohm's law, when current flows through a resistor, a voltage drop is generated across the resistor, and this voltage drop is proportional to the current. The first resistor R1 is connected in series in the power supply line 1. When current flows through the power supply line 1, a corresponding voltage drop is generated across the first resistor R1. The first current sensing amplifier U5 converts this voltage drop into a corresponding current signal and then transmits this signal to the comparison unit U2, thereby achieving sampling and monitoring of the current in the power supply line 1. This design of the first sampling unit 3 is simple in structure and low in cost, while accurately acquiring the current signal of the power supply line 1, providing reliable data support for the comparison unit U2, thus achieving effective monitoring of the server's power supply current and ensuring the safe operation of the server.

[0041] In one specific embodiment, the second sampling unit 4 includes a second resistor R2 / R3 / Rn and a second current sensing amplifier U6 / U7 / Un; the second resistor R2 / R3 / Rn is connected in series in the load line 2, and the second current sensing amplifier U6 / U7 / Un is connected across the two ends of the second resistor R2 / R3 / Rn.

[0042] Specifically, the second sampling unit 4 uses a combination of a second resistor R2 / R3 / Rn and a second current sensing amplifier U6 / U7 / Un. Similar to the first sampling unit 3, it samples the current of the load line 2 using Ohm's law and the principle of a current sensing amplifier. The current in the load line 2 passes through the second resistor R2 / R3 / Rn, generating a voltage drop across it that is proportional to the magnitude of the current. The second current sensing amplifier U6 / U7 / Un converts this voltage drop into a corresponding current signal, which is then transmitted to the subsequent comparison unit U2 or amplifier unit U1 (if present) to monitor the current status of the load line 2.

[0043] More specifically, the first current sensing amplifier U5 and the second current sensing amplifiers U6 / U7 / Un all use the INA199 current sensing amplifier, and the amplification factor of the first current sensing amplifier U5 and the second current sensing amplifiers U6 / U7 / Un is the same. The amplification factor can be set to 100x, 200x, or other factors as needed. Using the INA199 current sensing amplifier ensures accurate sampling signals due to its high precision. The same amplification factor provides a consistent benchmark for the first and second sampling results, reducing comparison errors caused by amplification differences and improving the accuracy of current difference judgment. Selectable amplification factors such as 100x and 200x adapt to different current scenarios, enhancing system adaptability and flexibility, and ensuring reliable operation of the burn-out protection logic.

[0044] In one specific embodiment, a VR power conversion unit 6 is provided between the power supply line 1 and the load line 2.

[0045] Specifically, a VR power conversion unit 6 is installed between power supply line 1 and load line 2. Its core principle is to achieve precise voltage conversion and regulation. The voltage output from power supply line 1 may not match the voltage required by load line 2. The VR power conversion unit 6 converts the input voltage of power supply line 1 into a stable voltage suitable for load line 2, while also possessing certain voltage regulation and filtering functions to reduce the impact of voltage fluctuations on load line 2, providing a stable voltage foundation for subsequent current sampling and protection logic. The addition of the VR power conversion unit 6 solves the problem of mismatch between the supply voltage and load requirements, reducing the risk of abnormal current due to voltage instability. Stable voltage output makes the operation of load line 2 more reliable, while also making the current sampling signal more stable, reducing the interference of voltage fluctuations on sampling accuracy, and indirectly improving the protection accuracy of the entire anti-burnout board system.

[0046] In one specific embodiment, there are multiple load lines 2, and the multiple load lines 2 are arranged in parallel. The second sampling unit 4 is arranged corresponding to the load line 2, and all the second sampling units 4 are combined and connected to the amplifier unit U1.

[0047] Specifically, multiple load lines 2 are configured in parallel, and a corresponding second sampling unit 4 is configured and connected to amplifier unit U1 after current convergence. The principle is to optimize signal transmission paths while achieving independent monitoring of multiple lines. The second sampling unit 4 of each load line 2 independently collects current signals, which are then aggregated and input to amplifier unit U1. This retains the advantages of accurate sampling for single lines while reducing amplifier resource consumption through centralized amplification, balancing monitoring accuracy and system complexity. Independent sampling of multiple lines ensures accurate fault location, and anomalies in a single line can be identified through local changes in the converged signal. The centralized amplification design after current convergence reduces the number of amplifiers, lowers hardware costs and circuit layout complexity, while avoiding signal distortion caused by differences in amplifier parameters, improving the consistency of the reference signal, and making the comparison unit U2 more accurate.

[0048] In one specific embodiment, the second sampling unit 4 further includes a third resistor R22 / R33 / Rnn, the two ends of which are connected to the second current sensing amplifier U6 / U7 / Un and the amplifier unit U1, respectively.

[0049] Specifically, the third resistor R22 / R33 / Rnn in the second sampling unit 4 is connected between the second current sensing amplifier U6 / U7 / Un and the amplifier unit U1. Its function is to achieve signal conditioning and impedance matching. The signal output by the second current sensing amplifier U6 / U7 / Un may have impedance mismatch issues. The third resistor R22 / R33 / Rnn can adjust the signal transmission impedance and fine-tune the signal strength to ensure that the signal input to the amplifier unit U1 is within the optimal amplification range, reducing signal distortion. The third resistor R22 / R33 / Rnn solves the impedance mismatch problem in signal transmission, reduces signal reflection and attenuation, and improves the stability and accuracy of signal transmission. By fine-tuning the signal strength, saturation or distortion of the amplifier due to excessively strong or weak input signals is avoided, ensuring effective amplification of the second sampled signal and improving the judgment accuracy of the comparison unit U2.

[0050] In one specific embodiment, the control unit 5 includes a control chip U3, which is connected to the comparison unit U2 and the power supply J1.

[0051] Specifically, the control chip U3 is either an MCU or a CPLD. The control unit 5 uses the control chip U3 (MCU or CPLD) and is connected to the comparator unit U2 and the power supply J1. The core principle is to achieve rapid response and flexible adaptation for overcurrent protection through a programmable control chip. The CPLD, with its high-speed logic processing capabilities, can complete trigger signal reception and power-off command output in microseconds; the MCU, through its built-in program, performs complex logic judgments and multitasking. Both can execute preset protection logic based on the trigger signal from the comparator unit, adapting to the different requirements of response speed and functional complexity in various scenarios.

[0052] In one specific embodiment, the control unit 5 further includes a BMC U4, which is connected to the control chip U3.

[0053] Specifically, control unit 5 adds a BMC U4 (Baseboard Management Controller) and connects to control chip U3. The principle is to achieve intelligent management and remote monitoring of the protection system. As the management core of the server, BMC U4 can interact with control chip U3 to obtain and display the operating status and fault information of the protection system. It can also send configuration commands to control chip U3 to adjust protection parameters, enabling remote configuration and upgrades of the protection logic. The combination of BMC U4 and control chip U3 gives the burn-out protection board system remote monitoring and management capabilities. Administrators can grasp the system status and handle faults without on-site operation, improving the convenience and efficiency of server maintenance. BMC U4's data analysis capabilities provide data support for the optimization of the protection system; through long-term data accumulation, the protection strategy can be continuously improved.

[0054] See Figure 3 As shown, in addition, this embodiment of the invention also provides a method for operating a server burn-in protection system, applicable to the above-mentioned server burn-in protection system, the method comprising:

[0055] S1, power supply J1 supplies power to load line 2 through power supply line 1;

[0056] At this time, the input voltage of power supply J1 is V1, and the output voltage of load line 2 is V2.

[0057] S2. The first sampling unit 3 samples the power supply line 1 and obtains the first sampling result;

[0058] Specifically, the first sampling result is the input current amplified by the first current sensing amplifier U5, denoted as I1;

[0059] S3, the second sampling unit 4 samples the load line 2 and obtains the second sampling result;

[0060] Specifically, when there is one load line 2 in the server burn-out protection system, the second sampling result is the output current amplified by the second current sensing amplifier U6 and amplifier unit U1, denoted as I2 = K * I22. When there are n load lines 2 in the server burn-out protection system, I2 = K * (I22 + I33 + ... + Inn), where I22, I33, and Inn are the output currents of each load line 2 amplified by the second current sensing amplifiers U6, U7, and Inn, respectively, and K is the amplification factor of amplifier unit U1. The second sampling result represents the reference signal of the maximum safe threshold of the input current and is directly used to define the safe boundary of the power supply current.

[0061] More specifically, when there is no VR power conversion unit 6 between power supply line 1 and load line 2, theoretically I1=I22+I33+…+Inn. Considering that the sampling results may have an error of 10% to 20%, K can be set to 1.1 to 1.2.

[0062] When there is only one load line 2, and a VR power conversion unit 6 exists between the power supply line 1 and the load line 2, the VR power conversion unit 6 has a conversion efficiency, the range of which is [fmin, fmax]. Theoretically:

[0063] I 1*V1*f=I22*V2, Vr1=I 1*R1, Vr2=I22*R2;

[0064] Vr1 / Vr2=I 1*R1 / (I22*R2)=V2*R1 / (V1*R2*f);

[0065] Where Vr1 is the voltage difference across the first sampling resistor R1 and Vr2 is the voltage difference across the second sampling resistor R2; at this time, considering an error of 10% to 20%, and considering that the conversion efficiency f of the VR power conversion unit 6 is the lowest, the amplifier's amplification factor can be set to 1.1*V2*R1 / (V1*R2*fmin) to 1.2*V2*R1 / (V1*R2*fmin).

[0066] The amplifier gain K is dynamically adjusted for different scenarios with and without the VR power conversion unit 6: Without the VR unit, K is set to 1.1-1.2 to account for a 10%-20% error, closely matching actual current fluctuations; with the VR unit, K is set to 1.1-1.2 times the theoretically calculated value based on the minimum conversion efficiency, resistance-voltage difference, and voltage parameters, ensuring the amplified signal accurately corresponds to the maximum safe threshold of the input current. This on-demand adaptive setting improves the accuracy of the comparison unit U2's judgment benchmark, reduces false positives and false negatives due to scenario differences, and enhances the reliability and system adaptability of overcurrent protection.

[0067] S4. Comparison unit U2 acquires and compares the first sampling result and the second sampling result, and obtains the comparison result;

[0068] Specifically, based on the core comparison logic of "actual input current vs. maximum safety threshold", comparison unit U2 directly compares the first sampling result (real-time input current I1) with the second sampling result (maximum safety threshold). Without the VR unit, it compares whether I1 exceeds the safety threshold represented by K*(I2² + ... + Inn). With the VR unit, based on the threshold formula derived from energy conservation, it determines whether I1 exceeds the safety threshold corresponding to 1.1-1.2 times the theoretically calculated value. The threshold over-limit judgment is implemented through hardware circuitry, generating the comparison result. By explicitly defining the second sampling result as the safety threshold, the comparison logic is upgraded from "current difference judgment" to "direct comparison of actual value and safety upper limit," simplifying the judgment chain while improving the clarity of the reference, making overcurrent judgment more intuitive and accurate, and further reducing the probability of misjudgment.

[0069] S5. When the comparison result is that the first sampling result is greater than the second sampling result, the comparison unit U2 triggers the control unit 5.

[0070] Specifically, based on the "threshold over-limit trigger" logic, when the first sampling result (actual input current) exceeds the second sampling result (maximum safe threshold), it indicates that the power supply current has exceeded the load's safe bearing limit, posing a risk of board burnout. The comparison unit U2 transmits the "over-limit" status to the control unit 5 through hardware level transitions or digital instructions, completing the crucial transition from safety monitoring to protection activation and ensuring timely risk response.

[0071] S6, Control Unit 5 controls the power supply J1 to turn off, and the power supply J1 stops supplying power to the load line 2.

[0072] Specifically, the control chip U3 and BMC U4 in control unit 5 work together to shut down power supply J1 based on the principle of combining fast response and intelligent management. When the comparator unit U2 triggers control unit 5, the control chip U3, with its high-speed logic processing capability, immediately receives the trigger signal and, through its connection with power supply J1, outputs a control command to quickly shut down power supply J1, cutting off the connection between power supply line 1 and load line 2. This process is completed in microseconds, which can quickly prevent overcurrent damage to the lines. At the same time, the control chip U3 transmits the shutdown command and related status information to BMC U4. BMC U4 records detailed data of this shutdown event, such as the shutdown time, the first sampling result and the second sampling result at the time of triggering, etc., and monitors and locks the shutdown status through its own management function to prevent power supply J1 from restarting unexpectedly if the fault is not resolved. The collaborative work of control chip U3 and BMC U4 makes the shutdown of power supply J1 both fast and efficient, and also has intelligent management and recording functions, improving the reliability and maintainability of the entire anti-burn-out board system.

[0073] The above embodiments are preferred implementations of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A server anti-burn-out board system, characterized in that, include: Power supply, power supply line, load line, first sampling unit, second sampling unit, comparison unit and control unit; The power supply, the power supply line, and the load line are connected in sequence; one end of the first sampling unit is located on the power supply line, and the other end is connected to the comparison unit; One end of the second sampling unit is located on the load line, and the other end is connected to the comparison unit; The control unit is connected to the comparison unit and the power supply.

2. The server burn-out protection system according to claim 1, characterized in that, An amplifier unit is connected between the second sampling unit and the comparison unit.

3. The server burn-out protection system according to claim 1, characterized in that, The first sampling unit includes a first resistor and a first current sensing amplifier; the first resistor is connected in series in the power supply line; the first current sensing amplifier is connected across the first resistor and connected to the comparison unit.

4. The server burn-out protection system according to claim 3, characterized in that, The second sampling unit includes a second resistor and a second current sensing amplifier; the second resistor is connected in series in the load line, and the second current sensing amplifier is connected across the two ends of the second resistor.

5. The server burn-out protection system according to claim 4, characterized in that, A VR power conversion unit is provided between the power supply line and the load line.

6. The server burn-out protection system according to claim 4, characterized in that, The load line has multiple lines, and the multiple load lines are arranged in parallel. The second sampling unit is arranged corresponding to the load line. All the second sampling units are combined and connected to the amplifier unit.

7. The server burn-out protection system according to claim 6, characterized in that, The second sampling unit further includes a third resistor, the two ends of which are respectively connected to the second current sensing amplifier and the amplifier unit.

8. The server burn-out protection system according to claim 1, characterized in that, The control unit includes a control chip, which is connected to the comparison unit and the power supply.

9. The server burn-out protection system according to claim 8, characterized in that, The control unit also includes a BMC, which is connected to the control chip.

10. A method for operating a server burn-out protection system, characterized in that, The server burn-out protection system according to any one of claims 1 to 9, wherein the working method includes: The power supply provides power to the load line through the power supply line; The first sampling unit samples the power supply line and obtains the first sampling result; The second sampling unit samples the load line and obtains a second sampling result; The comparison unit acquires and compares the first sampling result and the second sampling result, and obtains the comparison result; When the comparison result is that the first sampling result is greater than the second sampling result, the comparison unit triggers the control unit; The control unit controls the power supply to shut down, and the power supply stops supplying power to the load line.

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