Power supply circuit, electronic system and electronic system power supply end monitoring method

Abstract

The invention provides a power supply circuit, an electronic system and an electronic system power supply end monitoring method. The power supply circuit comprises a sampling precision conversion circuit and a power supply chip. The input end of the sampling precision conversion circuit is connected with the power supply end, and the output end of the sampling precision conversion circuit is connected with the power supply chip. According to the power supply circuit, the electronic system and the electronic system power supply end monitoring method provided by the invention, the shared signal sent by the power supply end of the electronic system can be obtained more timely and more accurately by depending on the sampling precision conversion circuit closer to the power supply end of the electronic system, and the more stable PWM signal is generated based on the voltage of the shared signal; therefore, the power supply chip closer to the processor in the electronic system can acquire the power supply voltage value of the power supply end of the electronic system more timely and more accurately, the monitoring real-time performance and the monitoring accuracy of monitoring the power supply end of the electronic system can be improved, the operation stability and the operation reliability of the electronic system can be improved, and the user perception can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic digital data processing, and in particular to a power supply circuit, an electronic system and a method for monitoring a power supply end of the electronic system. Background Art

[0002] For large electronic systems such as server systems, the stability of power supply is of great significance to the stable operation of the above large electronic systems.

[0003] In order to ensure stable power supply and efficient operation of the above-mentioned large electronic system in the related art, the stability and fluctuation of the power supply voltage of the above-mentioned power supply end can be monitored by sampling the voltage of the shared (Ishare) signal emitted by the above-mentioned power supply end.

[0004] However, the mainboard area in the above-mentioned large electronic system is usually large, which results in a long communication distance for the shared signal emitted by the above-mentioned power supply end to be transmitted from the power supply end to the power supply chip in the above-mentioned large electronic system, which in turn makes it difficult for the above-mentioned power supply chip to obtain the power supply voltage value of the above-mentioned power supply end in time, resulting in a certain lag in the monitoring of the above-mentioned power supply end. In addition, since the shared signal emitted by the above-mentioned power supply end is a low-voltage signal, in the process of transmitting the above-mentioned shared signal from the power supply end to the power supply chip in the above-mentioned large electronic system, the high-frequency signal in the above-mentioned large electronic system interferes with the above-mentioned shared signal to a large extent, resulting in the above-mentioned power supply chip having difficulty in accurately obtaining the power supply voltage value of the above-mentioned power supply end, which in turn results in a certain error in the monitoring of the power supply voltage of the above-mentioned power supply end. Therefore, how to improve the real-time monitoring and monitoring accuracy of the power supply end of a large electronic system is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0005] The present invention provides a power supply circuit, an electronic system and a method for monitoring the power supply end of the electronic system, so as to solve the defects of hysteresis and error in the prior art when monitoring the power supply end of a large electronic system, and to improve the real-time monitoring and monitoring accuracy of the power supply end of the large electronic system.

[0006] The present invention provides a power supply circuit, comprising: a sampling accuracy conversion circuit and a power supply chip; the sampling accuracy conversion circuit is arranged close to a power supply end of an electronic system, and the power supply chip is arranged close to a processor in the electronic system; the input end of the sampling accuracy conversion circuit is connected to the power supply end, and the output end of the sampling accuracy conversion circuit is connected to the power supply chip; The sampling accuracy conversion circuit is used to generate a pulse width modulation (PWM) signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal based on the voltage value of the shared signal when receiving the shared signal sent by the power supply end, and then send the PWM signal to the power supply chip; The power supply chip is used to obtain the voltage value of the shared signal based on the frequency duty cycle of the PWM signal when the PWM signal is received.

[0007] According to a power supply circuit provided by the present invention, the sampling accuracy conversion circuit comprises: a voltage comparator, a reference voltage source, a first capacitor and a PWM signal generator; The first input end of the voltage comparator is the input end of the sampling precision conversion circuit, the second input end of the voltage comparator is connected to a reference voltage source, the output end of the voltage comparator is respectively connected to the first end of the first capacitor and the input end of the PWM signal generator, the second end of the first capacitor is grounded, and the output end of the PWM signal generator is the output end of the sampling precision conversion circuit.

[0008] According to a power supply circuit provided by the present invention, the power supply chip includes: a power supply microcontroller unit, a voltage dividing resistor module, a second capacitor and a voltage follower; The input end of the voltage-dividing resistor module is connected to the output end of the sampling accuracy conversion circuit, the first output end of the voltage-dividing resistor module is connected to the first end of the second capacitor, the second output end of the voltage-dividing resistor module is connected to the first input end of the voltage follower, the second end of the second capacitor is grounded, the second input end of the voltage follower and the output end of the voltage follower are connected to the input end of the power supply microcontroller unit, and the output end of the power supply microcontroller unit is connected to the processor in the electronic system.

[0009] According to a power supply circuit provided by the present invention, the target signal line for connecting the output end of the sampling accuracy conversion circuit with the power supply chip in the electronic system has a distance between the target signal line and the high-frequency signal line in the electronic system that is not less than a distance threshold.

[0010] According to a power supply circuit provided by the present invention, the voltage of the target signal line is determined based on the power supply voltage and / or the communication frequency of the processor in the electronic system.

[0011] According to a power supply circuit provided by the present invention, when the power supply voltage of the processor in the electronic system is 3.3V or 1.5V, the voltage of the target signal line is 5V.

[0012] According to a power supply circuit provided by the present invention, the voltage-dividing resistor module comprises: a first resistor and a second resistor; the input end of the first resistor is the input end of the voltage-dividing resistor module, the output end of the first resistor is the second output end of the voltage-dividing resistor module, and the output end of the second resistor is the first output end of the voltage-dividing resistor module; The input end of the second resistor is connected to the output end of the first resistor; Resistance values ​​of the first resistor and the second resistor are determined based on a supply voltage of a processor in the electronic system.

[0013] According to a power supply circuit provided by the present invention, the frequency duty cycle of the PWM signal ranges from 50% to 80%.

[0014] The present invention also provides an electronic system, comprising: a processor and any power supply circuit as described above; the power supply end of the electronic system and the processor are connected via the power supply circuit; The processor is used to obtain the monitoring result of the power supply end based on the voltage value of the shared signal when receiving the voltage value of the shared signal sent by the power supply circuit.

[0015] The present invention also provides a method for monitoring a power supply end of an electronic system based on any of the power supply circuits described above, characterized in that it comprises: The sampling accuracy conversion circuit in the power supply circuit, when acquiring the shared signal sent by the power supply end of the electronic system, generates a PWM signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal based on the voltage value of the shared signal, and then sends the PWM signal to the power supply chip in the power supply circuit; After the power supply chip obtains the voltage value of the shared signal based on the frequency duty cycle of the PWM signal, the voltage value of the shared signal is sent to the central processing unit CPU in the electronic system, so that the CPU in the electronic system can obtain the monitoring result of the power supply end of the electronic system based on the voltage value of the shared signal.

[0016] The present invention provides a power supply circuit, an electronic system, and a method for monitoring the power supply end of an electronic system. The power supply circuit includes a sampling accuracy conversion circuit and a power supply chip. The power supply chip and the power supply end of the electronic system are connected through the sampling accuracy conversion circuit. When the sampling accuracy conversion circuit receives a shared signal sent by the power supply end, the sampling accuracy conversion circuit generates a pulse width modulation (PWM) signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal based on the voltage value of the shared signal, and then sends the PWM signal to the power supply chip. When the power supply chip receives the PWM signal, the power supply chip obtains the voltage value of the shared signal based on the frequency duty cycle of the PWM signal, and then sends the voltage value of the shared signal to A processor in an electronic system, so that the processor in the electronic system can obtain the power supply voltage value of the power supply end based on the voltage value of the shared signal, can rely on a sampling accuracy conversion circuit that is closer to the power supply end of the electronic system, to more timely and accurately obtain the shared signal emitted by the power supply end of the electronic system and to generate a more stable PWM signal based on the voltage of the shared signal, so that a power supply chip that is closer to the processor in the electronic system can more timely and accurately collect the power supply voltage value of the power supply end of the electronic system, thereby improving the real-time monitoring and monitoring accuracy of the power supply end of the electronic system, improving the operating stability and reliability of the electronic system, and improving user perception. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is one of the structural schematic diagrams of the power supply circuit provided by the present invention.

[0019] Figure 2 It is a structural schematic diagram of a sampling accuracy conversion circuit in a power supply circuit provided by the present invention.

[0020] Figure 3 This is the second structural schematic diagram of the power supply circuit provided by the present invention.

[0021] Figure 4 It is a structural schematic diagram of a power supply chip in a power supply circuit provided by the present invention.

[0022] Figure 5 It is a flow chart of the method for monitoring the power supply end of an electronic system provided by the present invention.

[0023] Reference numerals: 101: power supply circuit; 102: sampling precision conversion circuit; 103: power supply chip; 104: power supply end; 105: electronic system; 106: processor; 201: voltage comparator; 202: reference voltage source; 203: first capacitor; 204: PWM signal generator; 301: high-frequency signal routing; 401: power supply micro control unit; 402: voltage divider resistor module; 403: second capacitor; 404: voltage follower; 405: first output end of the voltage divider resistor module; 406: second output end of the voltage divider resistor module; 407: first input end of the voltage follower; 408: second input end of the voltage follower; 409: output end of the voltage follower; 410: first resistor; 411: second resistor; DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the description of the present application, the terms "first", "second", etc. are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually a class, and the number of objects is not limited. For example, the first object can be one or more. In addition, in the description of the present application, "and / or" represents at least one of the connected objects, and the character " / " generally represents that the front and back associated objects are in an "or" relationship.

[0027] Combine the following Figure 1-Figure 4 The power supply circuit provided by the present invention is described.

[0028] Figure 1 is one of the structural schematic diagrams of the power supply circuit provided by the present invention, such as Figure 1 As shown, the power supply circuit 101 includes: a sampling accuracy conversion circuit 102 and a power supply chip 103; the sampling accuracy conversion circuit 102 is arranged close to the power supply end 104 of the electronic system 105, and the power supply chip 103 is arranged close to the processor 106 in the electronic system 105; the input end of the sampling accuracy conversion circuit 102 is connected to the power supply end 104, and the output end of the sampling accuracy conversion circuit 102 is connected to the power supply chip 103.

[0029] The sampling accuracy conversion circuit 102 is used to generate a pulse width modulation PWM signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal based on the voltage value of the shared signal when receiving the shared signal sent by the power supply terminal 104, and then send the PWM signal to the power supply chip 103.

[0030] The power supply chip 103 is used to obtain the voltage value of the shared signal based on the frequency duty cycle of the PWM signal when receiving the PWM signal.

[0031] Specifically, the electronic system 105 in the embodiment of the present invention may include a large electronic system such as a server system and a computer system.

[0032] The power supply end 104 of the electronic system 105 refers to the power supply part that provides the required power for the entire electronic system 105. The power supply end 104 of the electronic system 105 generally includes a power conversion unit, a filter circuit, a protection circuit, etc., to ensure that stable, reliable and satisfactory power is provided to each component in the electronic system 105.

[0033] The supply voltage of the power supply terminal 104 refers to the power supply voltage provided by the power supply terminal 104 to the electronic system 105. The stability and accuracy of the supply voltage of the power supply terminal 104 directly affect the performance and reliability of the electronic system 105.

[0034] The sharing (Ishare) signal is a control signal used to achieve current sharing or load balancing in the electronic system 105. The sharing signal allows each power supply or module to share current information and adjust their respective output currents according to the information to achieve load balancing.

[0035] By sampling the shared signal sent by the power supply end 104 of the electronic system 105 in real time, the stability and fluctuation of the power supply voltage of the power supply end 104 can be monitored.

[0036] It should be noted that in the server system, the monitoring of the power supply end 104 of the server system in the related art is to determine the output power consumption and working status of the power supply end 104 of the server system by sampling the voltage of the shared signal output by the power supply end 104 of the server system.

[0037] The shared signal output by the power supply terminal 104 of the server system is usually an 8V high-voltage signal. The shared signal needs to be converted into an analog signal after voltage division sampling inside the server system, and then sent to the peripheral communication circuit of the CPU in the server system. The peripheral communication circuit sends the analog signal to the CPU for unified processing. The peripheral communication circuit can be the power supply chip 103.

[0038] In order to solve the technical defect that the mainboard area in the electronic system 105 is usually large, resulting in a long communication distance for the shared signal sent by the power supply terminal 104 of the electronic system 105 to be transmitted from the power supply terminal 104 to the central processing unit 106 CPU in the electronic system 105, which leads to a certain lag in the CPU's monitoring of the power supply voltage of the power supply terminal 104. In addition, since the shared signal sent by the power supply terminal 104 is a low-voltage signal, during the process of transmitting the shared signal from the power supply terminal 104 to the CPU, the high-frequency signal in the electronic system 105 interferes with the shared signal greatly, resulting in a certain error in the CPU's monitoring of the power supply voltage of the power supply terminal 104, in the embodiment of the present invention, a sampling accuracy conversion circuit 102 is added between the power supply terminal 104 of the electronic system 105 and the power supply chip 103 in the electronic system 105.

[0039] After the shared signal emitted by the power supply end 104 of the electronic system 105 is sent to the sampling precision conversion circuit 102, the sampling precision conversion circuit 102 can obtain the voltage value of the above-mentioned shared signal, and then based on the voltage value of the above-mentioned shared circuit, can generate a PWM signal whose frequency duty cycle is linearly positively correlated with the voltage value of the above-mentioned shared signal through numerical calculation, and then the above-mentioned PWM signal can be sent to the power supply chip 103.

[0040] Among them, the PWM (Pulse Width Modulation) signal is a digital signal that approximates the analog signal by adjusting the duty cycle of the pulse signal (i.e. the proportion of the high-level time to the entire signal cycle). The PWM signal consists of a series of periodic pulses, and the amplitude of the signal is expressed by changing the width of the pulse (i.e. the duration of the high level). The larger the pulse width, the higher the signal amplitude; conversely, the smaller the pulse width, the lower the signal amplitude.

[0041] The power supply chip 103 is also called a power management chip (Power Management Integrated Circuits, PMIC), which is a chip responsible for power management such as power conversion, distribution, and detection in the electronic system 105. The power supply chip 103 converts the input power into the stable voltage and current required by the system through complex internal circuits and algorithms to ensure the normal operation of the electronic equipment.

[0042] It should be noted that the power supply chip 103 in the embodiment of the present invention is arranged near the processor 106 in the electronic system 105, and the sampling accuracy conversion circuit 102 is arranged near the power supply end 104 of the electronic system 105, that is, the distance between the sampling accuracy conversion circuit 102 and the power supply end 104 of the electronic system 105 is not greater than the preset value, and the distance between the power supply chip 103 and the processor 106 in the electronic system 105 is not greater than the preset value.

[0043] It should be noted that the number of power supply chips 103 in the embodiment of the present invention may be multiple, and the power supply chips 103 may correspond one-to-one to the processors 106 in the electronic system 105, and the corresponding power supply chips 103 and processors 106 may be connected via signal lines.

[0044] When the power supply chip 103 in the embodiment of the present invention receives the above-mentioned PWM signal sent by the sampling precision conversion circuit 102, based on the frequency duty cycle of the above-mentioned PWM signal, it can calculate the voltage value of the shared signal emitted by the power supply end 104 of the electronic system 105 through numerical calculation, and then based on the voltage value of the above-mentioned shared signal, it can judge the power supply state and output power of the power supply end 104 of the electronic system 105.

[0045] After calculating the voltage value of the shared signal emitted by the power supply end 104 of the electronic system 105, the power supply chip 103 in the embodiment of the present invention can also send the voltage value of the shared signal to the processor 106 in the electronic system 105, so that the processor 106 can obtain the power supply voltage value, power and power supply status of the power supply end 104 of the electronic system 105 based on the voltage value of the shared signal, so as to monitor the power supply voltage of the power supply end 104.

[0046] It should be noted that the processor 106 in the electronic system 105 in the embodiment of the present invention may include a CPU in the electronic system 105 .

[0047] It should be noted that, when the sampling accuracy conversion circuit 102 in the embodiment of the present invention receives a shared signal sent by the power supply end 104 of the electronic system 105, it can also determine whether the power supply end 104 is in a normal power supply state by detecting whether the shared signal reaches current sharing. Then, when it is determined that the shared signal reaches current sharing, the voltage value of the shared signal can be obtained, and then based on the voltage value of the shared signal, a pulse width modulation PWM signal is generated whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal.

[0048] It should be noted that, in the embodiment of the present invention, the voltage value of the shared signal sent by the power supply terminal 104 of the electronic system 105 can be 0 to 8V.

[0049] It should be noted that, in the embodiment of the present invention, the power supply voltage value of the power supply end 104 of the electronic system 105 can be 12V. Through the power supply circuit 101 provided by the present invention, the 12V power supply voltage value can be converted into a 3.3V or 5V power supply voltage value to power electronic devices such as the processor 106 in the electronic system 105.

[0050] Figure 2 Schematic diagram of the structure of the sampling accuracy conversion circuit in the power supply circuit provided by the present invention. Figure 2 As shown, as an optional embodiment, the sampling accuracy conversion circuit 102 includes: a voltage comparator 201 , a reference voltage source 202 , a first capacitor 203 and a PWM signal generator 204 .

[0051] The first input terminal of the voltage comparator 201 is the input terminal of the sampling precision conversion circuit 102, the second input terminal of the voltage comparator 201 is connected to the reference voltage source 202, the output terminal of the voltage comparator 201 is respectively connected to the first terminal of the first capacitor 203 and the input terminal of the PWM signal generator 204, the second terminal of the first capacitor 203 is grounded, and the output terminal of the PWM signal generator 204 is the output terminal of the sampling precision conversion circuit 102.

[0052] Specifically, the voltage comparator 201 is a circuit for identifying and comparing input signals, and is a basic unit circuit for constituting a non-sinusoidal wave generating circuit. Its working principle is to compare two input voltages (usually a voltage to be compared and a reference voltage), and output a high level or low level signal according to the comparison result.

[0053] The shared signal outputted by the power supply terminal 104 of the electronic system 105 may be inputted into the voltage comparator 201 via the first input terminal of the voltage comparator 201 .

[0054] The reference voltage signal output by the reference voltage source 202 may be input into the voltage comparator 201 through the second input terminal of the voltage comparator 201 .

[0055] It should be noted that the voltage of the reference voltage signal output by the reference voltage source 202 in the embodiment of the present invention can be determined based on prior knowledge and / or actual conditions, and the voltage of the reference voltage signal output by the reference voltage source 202 is used to ensure that the voltage comparator 201 outputs the shared signal sent by the power supply terminal 104, thereby preventing the output of a shared signal with an excessive voltage, which may damage the power supply circuit 101. The voltage of the reference voltage signal output by the reference voltage source 202 is not specifically limited in the embodiment of the present invention.

[0056] Optionally, the voltage of the reference voltage signal output by the reference voltage source 202 in the embodiment of the present invention may be determined based on the power supply voltage and / or communication frequency of the processor 106 in the electronic system 105 .

[0057] Preferably, when the power supply voltage of the processor 106 in the electronic system 105 is 3.3V, the voltage of the reference voltage signal output by the reference voltage source 202 is 5V.

[0058] The PWM signal generator 204 in the embodiment of the present invention is a device or circuit capable of generating a digital signal with a specific duty cycle. A high-frequency timer is built in the PWM signal generator 204. After receiving the shared signal output by the voltage comparator 201, the PWM signal generator 204 can generate a pulse width modulation PWM signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal based on the voltage of the received shared signal.

[0059] Optionally, in the embodiment of the present invention, the frequency of the PWM signal generated by the PWM signal generator 204 is 100 MHz.

[0060] As an optional embodiment, the frequency duty cycle of the PWM signal ranges from 50% to 80%.

[0061] Specifically, when the voltage value of the shared signal emitted by the power supply terminal 104 of the electronic system 105 is 0 to 8V, if the voltage of the shared signal received by the PWM signal generator 204 is 0V, the PWM signal generator 204 can generate and output a PWM signal with a frequency duty cycle of 50%; if the voltage of the shared signal received by the PWM signal generator 204 is 0V, the PWM signal generator 204 can generate and output a PWM signal with a frequency duty cycle of 80%.

[0062] Based on the corresponding relationship between 0V voltage and 50% frequency duty cycle and 8V voltage and 80% frequency duty cycle, a linear positive correlation slope can be obtained. Based on the above slope, the PWM signal generator 204 can generate a pulse width modulation PWM signal whose frequency duty cycle is linearly positively correlated with the voltage value of the above shared signal based on the voltage of the received shared signal.

[0063] It should be noted that, when the PWM signal output by the PWM signal generator 204 has a voltage comparison accuracy of 0.1V, there are 80 frequency duty cycle classifications of the PWM signal corresponding to the shared signal of 0 to 8V.

[0064] The power supply circuit in the embodiment of the present invention includes a sampling accuracy conversion circuit and a power supply chip. The power supply chip and the power supply end of the electronic system are connected through the sampling accuracy conversion circuit. When the sampling accuracy conversion circuit receives a shared signal sent by the power supply end, based on the voltage value of the shared signal, it generates a pulse width modulation PWM signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal, and then sends the PWM signal to the power supply chip. When the power supply chip receives the PWM signal, it obtains the voltage value of the shared signal based on the frequency duty cycle of the PWM signal, and then sends the voltage value of the shared signal to the processor in the electronic system, so that the processor in the electronic system can obtain the power supply voltage value of the power supply end based on the voltage value of the shared signal. The sampling accuracy conversion circuit closer to the power supply end of the electronic system can be relied on to obtain the shared signal sent by the power supply end of the electronic system more timely and accurately, and generate a more stable PWM signal based on the voltage of the shared signal, so that the power supply chip closer to the processor in the electronic system can collect the power supply voltage value of the power supply end of the electronic system more timely and accurately, thereby improving the real-time monitoring and monitoring accuracy of the power supply end of the electronic system, improving the operation stability and reliability of the electronic system, and improving user perception.

[0065] Figure 3 This is the second structural schematic diagram of the power supply circuit provided by the present invention, such as Figure 3 As shown, as an optional embodiment, the distance between the target signal line connecting the output end of the sampling precision conversion circuit 102 and the power supply chip 103 and the high-frequency signal line 301 in the electronic system 105 is not less than a predefined distance threshold.

[0066] Specifically, in the embodiment of the present invention, the signal line used to connect the output end of the sampling accuracy conversion circuit 102 and the power supply chip 103 is called a target signal line.

[0067] In order to solve the technical defect in the related art that the shared signal emitted by the above-mentioned power supply terminal 104 is a low-voltage signal, and in the process of the above-mentioned shared signal being transmitted from the power supply terminal 104 to the CPU, the high-frequency signal in the electronic system 105 interferes with the above-mentioned shared signal to a large extent, resulting in a certain error in the CPU's monitoring of the power supply voltage of the above-mentioned power supply terminal 104, the distance between the target signal routing in the embodiment of the present invention and the high-frequency signal routing 301 in the electronic system 105 is not less than a predefined distance threshold, thereby reducing the interference of the high-frequency signal in the electronic system 105 on the PWM signal output by the sampling precision conversion circuit 102.

[0068] It should be noted that the distance threshold in the embodiment of the present invention may be determined based on prior knowledge, actual conditions, and the mainboard design of the electronic system 105. The specific value of the distance threshold is not limited in the embodiment of the present invention.

[0069] Optionally, the target signal line in the embodiment of the present invention can be routed along the outer edge of the mainboard of the electronic system 105, so as to be away from the high-frequency signal lines near the memory and CPU in the electronic system 105, so as to reduce the interference of the high-frequency signal in the electronic system 105 on the PWM signal output by the sampling precision conversion circuit 102.

[0070] Optionally, the target signal line in the embodiment of the present invention may be arranged on a layout layer of a mainboard of the electronic system 105 to ensure the stability of the PWM signal and the accuracy of signal transmission.

[0071] In the embodiment of the present invention, the distance between the target signal routing for connecting the output end of the sampling accuracy conversion circuit and the power supply chip and the high-frequency signal routing in the electronic system is not less than a predefined distance threshold, which can make the stable and real-time high-voltage PWM signal have stronger anti-interference ability, better ensure the stability of the PWM signal and the accuracy of PWM signal transmission, and make the target signal line have strong anti-interference ability in the non-minimum routing stage. At the same time, it also brings more free space for layout and wiring on the electronic system motherboard, which can reduce the pressure of layout and wiring on the electronic system motherboard.

[0072] As an optional embodiment, the voltage of the target signal trace is determined based on the power supply voltage and / or the communication frequency of the processor 106 in the electronic system 105 .

[0073] It should be noted that in the related art, the power supply end 104 of the electronic system 105 is connected to the power supply chip 103 via a 3V PMbus signal line. Compared with high-frequency signals with frequencies above 1 GHz, the shared signal emitted by the power supply end 104 of the electronic system 105 is easily interfered by high-frequency signals or packet loss may occur.

[0074] Among them, the PMbus (Power Management Bus) signal line is a serial communication protocol signal line used for power management. The above protocol is based on the SMBus (System Management Bus) and I2C bus standards, and adds more commands and features to meet the needs of power management. The PMBus signal line is mainly used to control and monitor power supply equipment to improve power efficiency, extend power life and ensure system reliability.

[0075] Therefore, in the embodiment of the present invention, determining the voltage of the target signal routing based on the power supply voltage and / or communication frequency of the processor 106 in the electronic system 105 can increase the transmission voltage of the PWM signal, thereby improving the anti-interference ability of the PWM signal when it is transmitted from the PWM signal generator 204 to the power supply chip 103.

[0076] As an optional embodiment, when the power supply voltage of the processor 106 in the electronic system 105 is 3.3V or 1.5V, the voltage of the target signal line is 5V.

[0077] Specifically, since the main frequency of the main control chip of the CPU in the electronic system 105 is usually as high as the communication frequency of 2~4GHz HZ, the power supply voltage is usually 3.3V or 1.5V. Therefore, the voltage of the target signal routing in the embodiment of the present invention is 5V. The 5V target signal routing can better reduce the electromagnetic interference of high-frequency signals in the electronic system 105.

[0078] Figure 4 Schematic diagram of the structure of the power supply chip in the power supply circuit provided by the present invention. Figure 4 As shown, as an optional embodiment, the power supply chip 103 includes: a power microcontroller unit 401 , a voltage-dividing resistor module 402 , a second capacitor 403 and a voltage follower 404 .

[0079] The input end of the voltage divider resistor module 402 is connected to the output end of the sampling accuracy conversion circuit 102, the first output end 405 of the voltage divider resistor module is connected to the first end of the second capacitor 403, the second output end 406 of the voltage divider resistor module is connected to the first input end 407 of the voltage follower, the second end of the second capacitor 403 is grounded, the second input end 408 of the voltage follower and the output end 409 of the voltage follower are connected to the input end of the power microcontroller unit 401, and the output end of the power microcontroller unit 401 is connected to the processor 106 in the electronic system 105.

[0080] Specifically, the voltage-dividing resistor module 402 in the embodiment of the present invention is used to divide the voltage of the received PWM signal, and then send the divided PWM signal to the voltage follower 404 .

[0081] The voltage follower 404 is a special amplifier circuit, the basic principle of which is to use negative feedback to achieve close follow-up between the output voltage and the input voltage. In this circuit, the amplifier (usually an operational amplifier) ​​acts as a negative feedback system. When the input voltage changes, the amplifier automatically adjusts the output voltage so that the negative feedback pin remains at the same potential, so that the output voltage is always equal to the input voltage.

[0082] The voltage follower 404 can analyze and process the divided PWM signal, and then input the analyzed and processed PWM signal into the power microcontroller unit 401 (MCU) as an input signal.

[0083] The power microcontroller unit 401 can process and analyze the input signal to obtain the voltage value of the shared signal output by the power supply terminal 104 of the electronic system 105 .

[0084] It should be noted that in the embodiment of the present invention, the power microcontroller unit 401 is connected to the processor 106 in the electronic system 105 via the PMbus signal line. After the power microcontroller unit 401 obtains the voltage value of the shared signal output by the power supply end 104 of the electronic system 105, the voltage value of the above-mentioned shared signal can be sent to the processor 106 in the electronic system 105 via the PMbus signal line, so that the above-mentioned processor 106 can obtain the power supply voltage value, power and power supply status of the power supply end 104 of the electronic system 105 based on the voltage value of the above-mentioned shared signal, so as to realize the monitoring of the power supply voltage of the above-mentioned power supply end 104.

[0085] As an optional embodiment, the voltage divider resistor module 402 includes: a first resistor 410 and a second resistor 411; the input end of the first resistor 410 is the input end of the voltage divider resistor module 402, the output end of the first resistor 410 is the second output end 406 of the voltage divider resistor module, and the output end of the second resistor 411 is the first output end 405 of the voltage divider resistor module.

[0086] An input terminal of the second resistor 411 is connected to an output terminal of the first resistor 410 .

[0087] The resistance values ​​of the first resistor 410 and the second resistor 411 are determined based on the supply voltage of the processor 106 in the electronic system 105 .

[0088] In the embodiment of the present invention, the power supply chip includes a power microcontroller unit, a voltage-dividing resistor module, a second capacitor and a voltage follower, which can more accurately and efficiently obtain the voltage value of the shared signal output by the power supply end of the electronic system based on the received PWM signal, improve the real-time monitoring and monitoring accuracy of the power supply end of the electronic system, improve the operating stability and reliability of the electronic system, and improve user perception.

[0089] Based on the contents of the above embodiments, an electronic system includes: a processor and the power supply circuit 101 as described above; the power supply end of the electronic system and the processor are connected through the power supply circuit 101.

[0090] The processor is used to obtain the monitoring result of the power supply end based on the voltage value of the shared signal when receiving the voltage value of the shared signal sent by the power supply circuit.

[0091] It should be noted that the electronic system in the embodiment of the present invention may include a large electronic system such as a server system and a computer system.

[0092] The electronic system in the embodiment of the present invention includes a processor and the power supply circuit 101. The processor in the electronic system in the embodiment of the present invention uses the power supply circuit 101 to obtain the voltage value of the shared signal sent by the power supply end of the electronic system, and then obtains the monitoring result of the power supply end of the electronic system based on the voltage value of the shared circuit. The specific steps can refer to the contents of the above embodiments, which will not be repeated in the embodiment of the present invention.

[0093] It should be noted that the monitoring result of the power supply end in the embodiment of the present invention may include but is not limited to at least one of the power supply voltage, power supply state and output power of the power supply end.

[0094] The electronic system in the embodiment of the present invention includes a processor and the above-mentioned power supply circuit, and can rely on the sampling accuracy conversion circuit in the above-mentioned power supply circuit that is closer to the power supply end of the electronic system to obtain the shared signal emitted by the power supply end of the electronic system more timely and accurately, and generate a more stable PWM signal based on the voltage of the shared signal, so that the power supply chip in the above-mentioned power supply circuit that is closer to the processor in the electronic system can collect the power supply voltage value of the power supply end of the electronic system more timely and accurately, thereby improving the real-time monitoring and monitoring accuracy of the power supply end of the electronic system, improving the operating stability and reliability of the electronic system, and improving user perception.

[0095] Figure 5 1 is a flow chart of the electronic system power supply end monitoring method provided by the present invention. The electronic system power supply end monitoring method provided by the present invention is implemented based on the power supply circuit 101 as described above. Figure 5 As shown, the method includes the following: Step 501, the sampling accuracy conversion circuit 102 in the power supply circuit 101, when obtaining a shared signal emitted by the power supply terminal 104 of the electronic system 105, generates a PWM signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal based on the voltage value of the shared signal, and then sends the PWM signal to the power supply chip 103 in the power supply circuit 101.

[0096] In step 502, the power supply chip 103 obtains the voltage value of the shared signal based on the frequency duty cycle of the PWM signal, and then sends the voltage value of the shared signal to the processor 106 in the electronic system 105, so that the CPU in the electronic system 105 can obtain the monitoring result of the power supply end 104 based on the voltage value of the shared signal.

[0097] It should be noted that the electronic system power supply terminal monitoring method provided by the present invention is implemented based on the power supply circuit 101 described above. The specific implementation steps of the electronic system power supply terminal monitoring method provided by the present invention can refer to the contents of the above embodiments. The embodiments of the present invention will not be repeated.

[0098] In the embodiment of the present invention, when a shared signal emitted by a power supply end of an electronic system is acquired by a sampling accuracy conversion circuit in a power supply circuit, a PWM signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal is generated based on the voltage value of the shared signal, and then the PWM signal is sent to a power supply chip in the power supply circuit. After the power supply chip acquires the voltage value of the shared signal based on the frequency duty cycle of the PWM signal, the voltage value of the shared signal is sent to a processor in the electronic system, so that the CPU in the electronic system can acquire the monitoring result of the power supply end based on the voltage value of the shared signal. The sampling accuracy conversion circuit in the power supply circuit that is closer to the power supply end of the electronic system can be relied on to acquire the shared signal emitted by the power supply end of the electronic system more timely and accurately, and generate a more stable PWM signal based on the voltage of the shared signal, so that the power supply chip in the power supply circuit that is closer to the processor in the electronic system can acquire the supply voltage value of the power supply end of the electronic system more timely and accurately, thereby improving the real-time monitoring and the monitoring accuracy of the power supply end of the electronic system, improving the operation stability and reliability of the electronic system, and improving the user perception.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power supply circuit, It is characterized in that include: Sampling accuracy conversion circuit and power supply chip; The sampling accuracy conversion circuit is arranged close to the power supply end of the electronic system, and the power supply chip is arranged close to the processor in the electronic system; The input end of the sampling accuracy conversion circuit is connected to the power supply end, and the output end of the sampling accuracy conversion circuit is connected to the power supply chip; The sampling accuracy conversion circuit is used to generate a pulse width modulation (PWM) signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal based on the voltage value of the shared signal when receiving the shared signal sent by the power supply end, and then send the PWM signal to the power supply chip; The power supply chip is used to obtain the voltage value of the shared signal based on the frequency duty cycle of the PWM signal when the PWM signal is received.

2. The power supply circuit according to claim 1, It is characterized in that The sampling accuracy conversion circuit comprises: a voltage comparator, a reference voltage source, a first capacitor and a PWM signal generator; The first input end of the voltage comparator is the input end of the sampling precision conversion circuit, the second input end of the voltage comparator is connected to a reference voltage source, the output end of the voltage comparator is respectively connected to the first end of the first capacitor and the input end of the PWM signal generator, the second end of the first capacitor is grounded, and the output end of the PWM signal generator is the output end of the sampling precision conversion circuit.

3. The power supply circuit according to claim 1, It is characterized in that The power supply chip comprises: a power microcontroller unit, a voltage-dividing resistor module, a second capacitor and a voltage follower; The input end of the voltage-dividing resistor module is connected to the output end of the sampling accuracy conversion circuit, the first output end of the voltage-dividing resistor module is connected to the first end of the second capacitor, the second output end of the voltage-dividing resistor module is connected to the first input end of the voltage follower, the second end of the second capacitor is grounded, the second input end of the voltage follower and the output end of the voltage follower are connected to the input end of the power supply microcontroller unit, and the output end of the power supply microcontroller unit is connected to the processor in the electronic system.

4. The power supply circuit according to claim 1, It is characterized in that The distance between the target signal line used to connect the output end of the sampling accuracy conversion circuit and the power supply chip in the electronic system and the high-frequency signal line in the electronic system is not less than a distance threshold.

5. The power supply circuit according to claim 4, It is characterized in that The voltage of the target signal trace is determined based on a power supply voltage and / or a communication frequency of a processor in the electronic system.

6. The power supply circuit according to claim 5, It is characterized in that When the power supply voltage of the processor in the electronic system is 3.3V or 1.5V, the voltage of the target signal line is 5V.

7. The power supply circuit according to claim 3, It is characterized in that The voltage-dividing resistor module comprises: a first resistor and a second resistor; The input end of the first resistor is the input end of the voltage-dividing resistor module, the output end of the first resistor is the second output end of the voltage-dividing resistor module, and the output end of the second resistor is the first output end of the voltage-dividing resistor module; The input end of the second resistor is connected to the output end of the first resistor; Resistance values ​​of the first resistor and the second resistor are determined based on a supply voltage of a processor in the electronic system.

8. The power supply circuit according to any one of claims 1 to 7, It is characterized in that The frequency duty cycle of the PWM signal ranges from 50% to 80%.

9. An electronic system, It is characterized in that include: A processor and a power supply circuit as claimed in any one of claims 1 to 8; The power supply end of the electronic system and the processor are connected via the power supply circuit; The processor is used to obtain the monitoring result of the power supply end based on the voltage value of the shared signal when receiving the voltage value of the shared signal sent by the power supply circuit.

10. A method for monitoring a power supply end of an electronic system based on the power supply circuit according to any one of claims 1 to 8, It is characterized in that include: The sampling accuracy conversion circuit in the power supply circuit, when acquiring the shared signal sent by the power supply end of the electronic system, generates a PWM signal whose frequency duty cycle is linearly positively correlated with the voltage value of the shared signal based on the voltage value of the shared signal, and then sends the PWM signal to the power supply chip in the power supply circuit; After the power supply chip obtains the voltage value of the shared signal based on the frequency duty cycle of the PWM signal, the voltage value of the shared signal is sent to the central processing unit CPU in the electronic system, so that the CPU in the electronic system can obtain the monitoring result of the power supply end of the electronic system based on the voltage value of the shared signal.

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