Boost circuit safety management system and method

Abstract

The invention discloses a boost circuit safety management system and method, and relates to the technical field of boost circuits, and the boost circuit safety management system comprises a boost circuit and a safety management system. The booster circuit is connected with the safety management system; the boost circuit comprises an input switch tube which is used for controlling on-off of an input power supply and the boost circuit. And the safety management system is used for acquiring working parameters in the booster circuit, performing safety detection on the booster circuit according to the working parameters, and when a safety detection result is abnormal, adjusting a first duty ratio of a grid electrode of the input switch tube to be a first target value so as to control disconnection of the input switch tube by using the first duty ratio. An input switch tube is integrated in the booster circuit, and when safety detection is abnormal, the safety management system adjusts a first duty ratio to a first target value, quickly turns off the input switch tube, cuts off connection between an input power supply and the booster circuit, and prevents energy from being continuously injected into a load through a booster inductor and a fly-wheel diode in the booster circuit. Hardware damage and printing plate firing are avoided.

Description

Technical Field

[0001] This application relates to the technical field of boost circuits, and in particular to a boost circuit safety management system and method. Background Art

[0002] As a core component for converting low voltage to high voltage, the boost circuit is widely used in scenarios that require boosting, such as storage servers. Its stability and reliability directly affect system safety. However, traditional boost circuits have inherent defects in load anomalies, surge impact, and health management, and a systematic optimization solution is urgently needed.

[0003] Currently, the boost circuit in related technologies controls energy conversion through a boost switch tube. When a safety anomaly such as a load short circuit or overcurrent is detected, only the boost switch tube is turned off to attempt to block energy transmission. However, the input power supply still supplies power to the load through the freewheeling path formed by the boost inductor and freewheeling diode in the boost circuit, and the connection between the input power supply and the load cannot be physically cut off. The boost inductor and freewheeling diode may be damaged due to overheating, and even cause the printed circuit board to catch fire. Summary of the Invention

[0004] This application provides a boost circuit safety management system and method to at least solve the problem that in related technologies, when a safety detection anomaly occurs in the boost circuit, the input power supply cannot be physically cut off, resulting in hardware overheating damage and fire risk.

[0005] This application provides a boost circuit safety management system, including: A boost circuit and a safety management system; The boost circuit is connected to the safety management system; The boost circuit includes an input switch tube, and the input switch tube is used to control the on / off of the input power supply and the boost circuit; The safety management system is used to obtain the operating parameters in the boost circuit, and perform a safety detection on the boost circuit according to the operating parameters. When the safety detection result is abnormal, the first duty cycle of the gate of the input switch tube is adjusted to a first target value to control the disconnection of the input switch tube using the first duty cycle.

[0006] This application also provides a boost circuit safety management method, which is applied to the safety management system in the aforementioned boost circuit safety management system, and includes: Obtain the operating parameters in the boost circuit, and perform a safety detection on the boost circuit according to the operating parameters. The boost circuit is connected to the safety management system; When the safety detection result is abnormal, adjust the first duty cycle of the gate of the input switch tube in the boost circuit to a first target value to control the disconnection of the input switch tube using the first duty cycle. The input switch tube is used to control the on / off of the input power supply and the boost circuit.

[0007] The boost circuit safety management system of the present application includes a boost circuit and a safety management system; the boost circuit is connected to the safety management system; the boost circuit includes an input switching transistor for controlling the on / off of the input power supply and the boost circuit; the safety management system is configured to obtain the operating parameters in the boost circuit and perform safety detection on the boost circuit according to the operating parameters. When the safety detection result is abnormal, the first duty ratio of the gate of the input switching transistor is adjusted to a first target value to control the disconnection of the input switching transistor using the first duty ratio. In the present application, an input switching transistor is integrated in the boost circuit, and the gate of the input switching transistor is controlled by the safety management system through the first duty ratio. When the safety detection is abnormal, the safety management system adjusts the first duty ratio to the first target value to quickly turn off the input switching transistor, cut off the connection between the input power supply and the boost circuit, prevent energy from being continuously injected into the load through the boost inductor and the freewheeling diode in the boost circuit, and avoid the risks of hardware damage and printed circuit board fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] To more clearly illustrate the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0009] Figure 1 Schematic diagram of a traditional boost circuit in a related art provided by an embodiment of the present application; Figure 2 Schematic diagram of a boost circuit safety management system provided by an embodiment of the present application; Figure 3 Schematic diagram of a specific boost circuit provided by an embodiment of the present application; Figure 4 Schematic diagram of a specific safety management system provided by an embodiment of the present application; Figure 5 Flowchart of the boost circuit safety management method provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0010] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the protection scope of the present application.

[0011] It should be noted that in the description of this application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. The terms "first", "second", etc. in this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0012] The boost circuit (such as the Boost circuit), as the core component for converting low voltage to high voltage, is widely used in scenarios that require boosting, such as storage servers. Its stability and reliability directly affect system security. However, traditional boost circuits have inherent defects in terms of load anomalies, surge impacts, and health management, and there is an urgent need for a systematic optimization solution.

[0013] Currently, the boost circuit of related technologies controls energy conversion through a boost switch tube. When detecting safety anomalies such as load short circuit or overcurrent, it only turns off the boost switch tube to attempt to block energy transmission. However, the input power supply still supplies power to the load through the freewheeling path formed by the boost inductor and the freewheeling diode in the boost circuit, and fails to physically cut off the connection between the input power supply and the load. The boost inductor and the freewheeling diode may be damaged due to overheating, and even cause the printed circuit board to catch fire.

[0014] Currently, the boost circuit of related technologies controls energy conversion through a boost switch tube. When detecting safety anomalies such as load short circuit or overcurrent, it only turns off the boost switch tube to attempt to block energy transmission. However, the input power supply still supplies power to the load through the freewheeling path formed by the boost inductor and the freewheeling diode in the boost circuit, and fails to physically cut off the connection between the input power supply and the load. The boost inductor and the freewheeling diode may be damaged due to overheating, and even cause the printed circuit board to catch fire. Moreover, due to power density limitations, the selection of the boost inductor, the freewheeling diode, and the design of the main circuit power supply wiring cannot be infinitely large. When the system is powered on or the printed circuit board is hot-plugged for maintenance, the output filter capacitor will generate a surge current, and an unreasonable boost power-on timing will increase the surge current impact. In addition, related technologies do not have a strategy for predicting the health status of the boost circuit and cannot collect black box logs of abnormal states.

[0015] Specifically, as Figure 1 shown, this application provides a schematic diagram of a traditional boost circuit in related technologies. Referring to Figure 1, The traditional boost circuit consists of a boost switch transistor Q1, a storage inductor L1, a freewheeling diode D1, an input filter capacitor C1, an output filter capacitor C2, and a dummy load R1. When the traditional boost circuit is operating normally, through the periodic switching action of Q1, L1 stores energy and then boosts the output through D1; however, when a short circuit or overcurrent anomaly occurs in the load, simply turning off Q1 cannot cut off the freewheeling path formed by the input power supply through L1 and D1, which may cause L1 and D1 to overheat and be damaged, and even pose safety hazards such as the printed circuit board catching fire.

[0016] To solve the problems in the related solutions, the embodiment of the present application provides a boost circuit safety management system. By integrating an input switch transistor at the input end of the boost circuit, its gate is connected to the pulse width modulation signal (PWM signal) output by the safety management system. When the safety detection result of the boost circuit is abnormal, the safety management system immediately adjusts the first duty cycle of the PWM signal from the current value to the first target value, causing the input switch transistor to quickly enter the cut-off state. This physical disconnection mechanism completely cuts off the connection path between the input power supply and the boost circuit, blocking the channel for energy to continuously inject into the faulty load through the boost inductor and the freewheeling diode, effectively avoiding device damage caused by overheating and the risk of the printed circuit board catching fire, and significantly improving the safety and reliability of the system. To enable those skilled in the art of this technology to better understand the solution of the present application, the following further elaborates on the present application in conjunction with the drawings and specific embodiments.

[0017] Figure 2 It is a schematic diagram of a boost circuit safety management system provided by an embodiment of the present application.

[0018] As Figure 2 shown, the system includes: A boost circuit 1 and a safety management system 2; The boost circuit 1 is connected to the safety management system 2; The boost circuit 1 includes an input switch transistor Q2, and the input switch transistor Q2 is used to control the on / off of the input power supply and the boost circuit 1; The safety management system 2 is used to obtain the operating parameters in the boost circuit 1, perform safety detection on the boost circuit 1 according to the operating parameters, and when the safety detection result is abnormal, adjust the first duty cycle of the gate of the input switch transistor Q2 to the first target value to control the disconnection of the input switch transistor Q2 using the first duty cycle.

[0019] In some embodiments, as Figure 3 shown, the present application provides a schematic diagram of a specific boost circuit. Referring to Figure 3 , the boost circuit of the present application consists of an input switch transistor Q2, a boost switch transistor Q1, a storage inductor L1, a freewheeling diode D1, an input filter capacitor C1, an output filter capacitor C2, and a dummy load R1.

[0020] Among them, the source of the input switching transistor Q2 is connected to the input power supply, the drain is connected to the input filter capacitor C1 and the energy storage inductor L1, and the gate is connected to the safety management system.

[0021] The boost switching transistor Q1 is used to control the energy storage and release of the energy storage inductor L1 to achieve the boost function; the energy storage inductor L1 is used to store the energy of the input voltage and release the energy when Q1 is turned off to boost the output voltage; the freewheeling diode D1 is used to conduct when Q1 is turned off to provide a freewheeling path for L1 and maintain the stability of the output voltage; the input filter capacitor C1 / output filter capacitor C2 are respectively used to smooth the input / output voltage and reduce the ripple interference; the input switching transistor Q2 is a newly added control device in this application, which is connected in series between the input power supply and the boost circuit and is used to cut off or conduct the input power supply path.

[0022] In some embodiments, the input switching transistor Q2 of this application is a power MOS transistor installed on the input side of the boost circuit. As an "electronic switch" for controlling the on and off of the input power supply, its on state is controlled by the pulse width modulation signal (PWM signal) output by the safety management system.

[0023] This application can adjust the gate voltage of the input switching transistor through the duty cycle of the PWM signal (i.e., the first duty cycle) to achieve dynamic control from micro-conduction (for example, the first duty cycle is 10%) to full conduction (the first duty cycle is the second target value, that is, 100%); when the first duty cycle is the first target value (i.e., 0%), it is fully turned off to cut off the input power supply path.

[0024] In some embodiments, the operating parameters are electrical physical quantities reflecting the operating state of the boost circuit and are the basis for the safety management system to perform safety detection.

[0025] The operating parameters in this application may include the input voltage (Vin), input current (Iin), output voltage (Vo), output current (Io), Vds / Ids of the boost switching transistor Q1 in the boost circuit.

[0026] Among them, the input voltage (Vin) is the voltage value of the input power supply and is used to judge whether there is overvoltage or undervoltage abnormality; the input current (Iin) is the current value of the input power supply, and the circuit load state and energy transfer efficiency are judged in combination with the output current; the output voltage (Vo) is the output voltage value of the boost circuit and is used to judge whether the boost function is normal and the load power supply state; the output current (Io) is the current value on the load side and is the core parameter for detecting abnormalities such as overcurrent and short circuit; Vds / Ids of the boost switching transistor Q1 is the voltage and current between the source and drain of Q1 and is used to calculate the on-resistance and predict the health state of Q1 (such as the degree of aging and whether it is about to fail).

[0027] In some embodiments, safety detection is a process in which the safety management system determines whether there is an abnormal risk in the boost circuit based on operating parameters through methods such as threshold comparison.

[0028] In some embodiments, the first duty cycle is the ratio of the high-level duration to the entire period in the PWM signal output by the safety management system to the gate of the input switching transistor Q2, and is used to control the conduction degree of Q2. The first target value is the target value of the PWM duty cycle set by the safety management system when the safety detection result is abnormal, usually 0%, and is used to quickly turn off the input switching transistor Q2.

[0029] Specifically, when the first duty cycle is the first target value (0%), Q2 is completely turned off, and the input power supply is disconnected from the boost circuit; when the first duty cycle is the second target value (100%), Q2 is completely turned on, and the input power supply is fully connected to the boost circuit at full power. When the safety detection result is abnormal, the present application can quickly adjust the PWM duty cycle of the gate of Q2 to the first target value (such as 0%), so that the input switching transistor Q2 changes from the on state to the off state, physically cutting off the input power supply path, preventing energy from continuously injecting into the fault point, and avoiding hardware damage.

[0030] In some embodiments, as Figure 4 shown, the present application provides a schematic diagram of a specific safety management system. Referring to Figure 4 , the safety management system includes an input protection control module, a monitoring and pre-judging module, a boost drive protection module, and a sampling module.

[0031] Among them, the monitoring and pre-judging module is respectively connected to the input protection control module, the boost drive protection module, and the sampling module. The input protection control module is connected to the gate of the input switching transistor Q2 in the boost circuit, and the boost drive protection module is connected to the gate of the boost switching transistor Q1. The health pre-judging module of the present application can specifically be an MCU micro-control unit.

[0032] In some embodiments, the input protection control module is used to obtain the operating parameters of the boost circuit. When the operating parameters are not within the first preset safety range, it determines that the safety detection result of the boost circuit is abnormal, and adjusts the first duty cycle to the first target value, so as to turn off the input switching transistor and physically cut off the connection between the input power supply and the boost circuit, disconnecting the input voltage and the load.

[0033] Among them, the operating parameters include the input voltage and the input current.

[0034] In some embodiments, the input protection control module is further configured to: when the input power supply is connected and conducted to the boost circuit, adjust the first duty cycle to a second target value according to a first preset step size, so as to control the input switching transistor to conduct by using the first duty cycle. When the system is powered on, the first duty cycle gradually increases, and the voltage of the input switching transistor slowly rises, suppressing the inrush current, eliminating the influence on the front end of the power supply module, and improving the power supply reliability.

[0035] In some embodiments, when the operating parameters are not within the first preset safety range, the input protection control module is configured to determine that the first status signal is a low-level signal and transmit the first status signal to the monitoring and prediction module; when the operating parameters are within the first preset safety range, the input protection control module is configured to determine that the first status signal is a high-level signal and transmit the first status signal to the monitoring and prediction module.

[0036] Refer to Figure 4 , the input control module outputs the PWM2 signal, controls the input switching transistor Q2 by adjusting the duty cycle of the PWM2 signal (i.e., the first duty cycle), and outputs the PWGD2 status signal (i.e., the first status signal) to the monitoring and prediction module.

[0037] When the voltage of the input switching transistor Q2 is within the normal range, the PWGD2 status signal is a high-level signal, and in other cases, the PWGD2 status signal is a low-level signal.

[0038] EN2 is a control signal sent by the monitoring and prediction module to the input protection control module, which is controlled by the voltage division of the monitoring and prediction module and the power supply input voltage. When the control signal is a high-level signal, it is determined that the boost circuit is effective. When the control signal is a low-level signal, the input protection control module adjusts the first duty cycle to a first target value based on the low-level control signal to turn off the input switching transistor.

[0039] The input protection control module implements the EFUSE function and monitors the input voltage and output current in the operating parameters. When the input voltage and / or the input circuit are not within their corresponding first preset safety ranges, it can be determined that there are safety abnormal conditions such as input undervoltage, input overvoltage, and output overcurrent, and the safety detection result is determined to be abnormal. At this time, the PWM2 duty cycle is adjusted to quickly turn off Q2 to prevent damage to the boost inductor and fire on the printed circuit board, and to prevent secondary spread of the fault.

[0040] Wherein, the first preset safety range is the overvoltage, undervoltage, and overcurrent protection thresholds of the input protection control module designed according to the power supply parameters of the boost circuit. The specific values are subject to the actual situation and are not limited in the embodiments of the present application.

[0041] In some embodiments, since the boost circuit includes a boost switching transistor for controlling the on / off of the boost circuit, the safety management system of the present application is further configured to obtain the operating parameters in the boost circuit, perform safety detection on the boost circuit according to the operating parameters, and when the safety detection result is abnormal, adjust the second duty ratio of the gate of the boost switching transistor to a first target value to control the disconnection of the boost switching transistor by using the second duty ratio.

[0042] In some embodiments, the boost drive protection module is configured to obtain the operating parameters of the boost circuit. When the operating parameters are not within the second preset safety range, it determines that the safety detection result of the boost circuit is abnormal and adjusts the second duty ratio to the first target value to disconnect the boost switching transistor and cut off the boost circuit.

[0043] Among them, the operating parameters include the input voltage, output voltage, input current, and output current.

[0044] In some embodiments, the boost drive protection module is further configured to store the operating parameters in a preset storage space in the boost drive protection module when the operating parameters are not within the second preset safety range.

[0045] In some embodiments, the boost drive protection module is configured to determine that the second status signal is a low-level signal and transmit the second status signal to the monitoring and pre-judging module when the operating parameters are not within the second preset safety range; the boost drive protection module is configured to determine that the second status signal is a high-level signal and transmit the second status signal to the monitoring and pre-judging module when the operating parameters are within the second preset safety range.

[0046] The boost drive protection module realizes the function of the boost power integration chip and jointly develops the abnormal pre-judging and processing function with the system on a conventional chip. Refer to Figure 4 , the boost drive protection module monitors the input voltage, output voltage, input current, and output current in the operating parameters. When any one of the input voltage, output voltage, input current, and output current is not within its corresponding second preset safety range, it determines that there are abnormal conditions such as output overcurrent short circuit and input voltage range in the boost circuit, that is, it determines that the detection result of the boost circuit is abnormal. At this time, by adjusting the second duty ratio to the first target value, the boost switching transistor is controlled to disconnect and the boost circuit is turned off. PWGD1 is the second status signal output by the boost drive protection control module. When the second status signal is a high-level signal, it indicates that the boost circuit is working normally. When the second status signal is a low-level signal, it indicates that the boost circuit is working abnormally.

[0047] Meanwhile, when the safety detection result of the boost circuit is abnormal, the boost drive protection module can also store the current input voltage, input current, output voltage, and output current with abnormal safety detection results in a preset storage space (FLASH). The safety management system can read the working parameters related to the abnormal safety detection results stored in the preset storage space through the PMBUS or SMBUS channel.

[0048] In some embodiments, the monitoring and prediction module is configured to: obtain a first status signal sent by the input protection control module, and send a control signal to the boost drive protection module based on the first status signal, or obtain a second status signal sent by the boost drive protection module, and send a control signal to the input protection control module based on the second status signal.

[0049] In some embodiments, the monitoring and prediction module is configured to: obtain a first status signal output by the input protection control module. When it is determined that the first status signal is a high-level signal, send a high-level control signal to the boost drive protection module, so that the boost drive protection module adjusts the second duty cycle of the gate of the boost switch tube in the boost circuit to a second target value based on the high-level control signal. Or obtain a second status signal output by the boost drive protection module. When the second status signal is a low level, send a low-level control signal to the input protection control module, so that the input protection control module adjusts the first duty cycle of the gate of the input switch tube to a first target value based on the low-level control signal.

[0050] The monitoring and prediction module can monitor the first status signal (PWGD2) output by the input protection control module and the second status signal (PWGD1) output by the boost drive protection circuit in real time.

[0051] Refer to Figure 4 , when the monitoring and prediction module detects that the first status signal sent by the input protection control module is a high-level signal (the voltage after the input protection control module is within the normal range), send a high-level control signal (i.e., the high-level EN1 signal) to the boost drive protection circuit, so that the boost drive protection control module adjusts the second duty cycle of the gate of the boost switch tube Q1 in the boost circuit to a second target value based on the high-level control signal, and the boost circuit starts to work.

[0052] Refer to Figure 4 , when the monitoring and prediction module detects that the second status signal sent by the boost drive protection module is a low-level signal (the falling edge of PWGD1 triggers an external interrupt of the MCU), send a low-level control signal (i.e., the low-level EN2 signal) to the input protection control module, so that the input protection control module adjusts the first duty cycle of the gate of the input switch tube Q2 to a first target value based on the low-level control signal to prevent secondary spread of the fault.

[0053] In some embodiments, the sampling module is configured to obtain the operating parameters of the boost circuit and send the operating parameters to the monitoring and prediction module. The operating parameters include the output voltage, the output current, and the voltage and current between the source and drain of the boost switching transistor.

[0054] In some embodiments, the monitoring and prediction module is further configured to: predict the health status of the boost circuit based on the operating parameters and send the health status to the boost drive protection module.

[0055] Referring to Figure 4 , the sampling module samples the input voltage Vin, the input current Iin, the output voltage Vo, the output current Io, the voltage Vds between the source and drain of the boost switching transistor Q1, and the current Ids between the source and drain of the boost switching transistor Q1, and transmits these sampled operating parameters to the monitoring and prediction module, so that the monitoring and prediction module performs health status prediction based on these operating parameters.

[0056] In some embodiments, the monitoring and prediction module is further configured to: determine the on-resistance of the boost switching transistor according to the voltage and current between the source and drain; determine whether the boost switching transistor is about to fail according to the on-resistance of the boost switching transistor; when it is determined that the boost switching transistor is about to fail, send the failure information that the boost switching transistor is about to fail to the boost drive protection module, so that the boost drive protection module adjusts the second duty cycle of the gate of the boost switching transistor in the boost circuit to a first target value according to the failure information at a second preset step size.

[0057] In some embodiments, the monitoring and prediction module is further configured to: determine whether the load of the boost circuit is abnormal according to the output voltage and the output current; when the load is abnormal, send the abnormal information of the abnormal load to the boost drive protection module, so that the boost drive protection module adjusts the second duty cycle of the gate of the boost switching transistor in the boost circuit to a first target value according to the abnormal information at a second preset step size. To achieve a slow turn-off of the boost circuit and prevent the failure of the power supply path and the input protection module due to abnormal turn-off.

[0058] Specifically, the input protection control module and the monitoring and prediction module can be connected through a PMBUS interface or an SMBUS interface, and the boost drive protection module and the monitoring and prediction module can be connected through a PMBUS interface or an SMBUS interface, and the health status is transmitted through the PMBUS interface or the SMBUS interface.

[0059] Referring to Figure 4, the monitoring and prediction module calculates the ratio of the voltage Vds and current Ids between the source and drain of the boost switch Q1 based on the voltage Vds and current Ids between the source and drain of the boost switch Q1, uses this ratio as the on-resistance of the boost switch Q1, predicts the health status of the boost switch Q1 based on the change in on-resistance, and determines whether the boost switch Q1 is about to fail when the resistance change rate of the on-resistance is greater than or equal to the preset change range. The monitoring and prediction module sends the failure information that the boost switch Q1 is about to fail to the boost drive protection module through the SMBUS channel.

[0060] Refer to Figure 4 , the monitoring and prediction module can also predict the health status of the load based on the change rules of the output voltage and output current. When the change rate of at least one of the output voltage and output current is greater than or equal to its corresponding preset change range, it is determined that the output load is approaching abnormality (i.e., the load is abnormal). The monitoring and prediction module sends the abnormal information of the load abnormality to the boost drive protection module through the SMBUS channel.

[0061] It can be understood that EN2 = (PWGD1 && VIN && (health status prediction result)), that is, only when the health prediction module determines that the second status signal output by the boost drive protection module is a high-level signal, the input voltage is within its corresponding preset safe range, and there is no abnormality in the health status, the health prediction module determines to output a high-level control signal to the input protection control module.

[0062] EN1 = (PWGD2 && (health status prediction result)), that is, only when the health prediction module determines that the first status signal output by the input protection control module is a high-level signal and there is no abnormality in the health status, the health prediction module determines to output a high-level control signal to the boost drive protection module.

[0063] Through this application, an input switch is integrated in the boost circuit, and the gate of the input switch is controlled by the safety management system through the first duty cycle. When a safety detection abnormality occurs, the safety management system adjusts the first duty cycle to the first target value to quickly turn off the input switch, cut off the connection between the input power supply and the boost circuit, and prevent energy from continuously injecting into the load through the boost inductor and freewheeling diode in the boost circuit, avoiding the risk of hardware damage and printed circuit board fire.

[0064] Based on Figures 2 to 4 the embodiment shown, Figure 5 Figure 21 further shows a flowchart of a boost circuit safety management method proposed by this application. The boost circuit safety management method in this application is applied to the safety management system in the boost circuit. As Figure 5 shown, this method includes the following steps: Step 101: Obtain the operating parameters in the boost circuit and perform a safety check on the boost circuit according to the operating parameters. The boost circuit is connected to the safety management system.

[0065] Step 102: When the safety check result is abnormal, adjust the first duty cycle of the gate of the input switching transistor in the boost circuit to a first target value to control the disconnection of the input switching transistor using the first duty cycle. The input switching transistor is used to control the connection and disconnection of the input power supply and the boost circuit.

[0066] In some embodiments, referring to Figure 4 , since the safety management system of the present application includes an input protection control module, a monitoring and prediction module, a boost drive protection module, and a sampling module.

[0067] In some embodiments, the input protection control module of the present application can, according to the input voltage and input current in the operating parameters of the boost circuit obtained, when either the input voltage or the input current is not within its corresponding first preset safety range, determine that the safety check result of the boost circuit is abnormal and adjust the first duty cycle to the first target value.

[0068] When the input power supply is connected and conducted to the boost circuit, the input protection control module adjusts the first duty cycle to a second target value at a first preset step size to transmit the second target value to the gate of the input switching transistor and control the conduction of the input switching transistor using the first duty cycle.

[0069] When either the input voltage or the input current is not within its corresponding first preset safety range, the input protection control module determines that the first status signal is a low-level signal and transmits the first status signal to the monitoring and prediction module; when both the input voltage and the input current are within the first preset safety range, the input protection control module determines that the first status signal is a high-level signal and transmits the first status signal to the monitoring and prediction module.

[0070] In some embodiments, the boost drive protection module of the present application can obtain the operating parameters in the boost circuit and perform a safety check on the boost circuit according to the operating parameters. When the safety check result is abnormal, adjust the second duty cycle of the gate of the boost switching transistor to a first target value to transmit the second duty cycle of the first target value to the gate of the boost switching transistor and control the disconnection of the boost switching transistor using the second duty cycle.

[0071] The boost drive protection module obtains the input voltage, output voltage, input current, and output current in the operating parameters of the boost circuit. When any one of the input voltage, output voltage, input current, and output current is not within its corresponding second preset safety range, determine that the safety check result of the boost circuit is abnormal and adjust the second duty cycle to the first target value.

[0072] When any one of the input voltage, output voltage, input current, and output current is not within the second preset safety range, the boost drive protection module stores the current input voltage, output voltage, input current, and output current in a preset storage space in the boost drive protection module.

[0073] When any one of the input voltage, output voltage, input current, and output current is not within its corresponding second preset safety range, the boost drive protection module determines that the second status signal is a low-level signal and transmits the second status signal to the monitoring and prediction module; the boost drive protection module is used to determine that the second status signal is a high-level signal when the operating parameters are within the second preset safety range and transmit the second status signal to the monitoring and prediction module.

[0074] In some embodiments, the monitoring and prediction module of the present application is used to obtain the first status signal sent by the input protection control module and send a control signal to the boost drive protection module based on the first status signal, or obtain the second status signal sent by the boost drive protection module and send a control signal to the input protection control module based on the second status signal.

[0075] The monitoring and prediction module obtains the first status signal output by the input protection control module. When it is determined that the first status signal is a high-level signal, it sends a high-level control signal to the boost drive protection module so that the boost drive protection module adjusts the second duty cycle of the gate of the boost switch tube in the boost circuit to a second target value based on the high-level control signal, or obtains the second status signal output by the boost drive protection module. When the second status signal is a low level, it sends a low-level control signal to the input protection control module so that the input protection control module adjusts the first duty cycle of the gate of the input switch tube to a first target value based on the low-level control signal.

[0076] In some embodiments, the sampling module of the present application can obtain the operating parameters of the boost circuit and send the operating parameters to the monitoring and prediction module. The operating parameters include the output voltage, output current, and the voltage and current between the source and drain of the boost switch tube.

[0077] In some embodiments, the monitoring and prediction module of the present application can predict the health status of the boost circuit based on the operating parameters collected by the sampling module and send the health status to the boost drive protection module.

[0078] The monitoring and prediction module determines the on-resistance of the boost switch transistor based on the voltage between the source and the drain and the current between the source and the drain; determines whether the boost switch transistor is about to fail based on the on-resistance of the boost switch transistor; when it is determined that the boost switch transistor is about to fail, sends the failure information that the boost switch transistor is about to fail to the boost drive protection module, so that the boost drive protection module adjusts the second duty cycle of the gate of the boost switch transistor in the boost circuit to a first target value according to the failure information at a second preset step size.

[0079] The monitoring and prediction module determines whether the load of the boost circuit is abnormal based on the output voltage and the output current; when the load is abnormal, sends the abnormal information that the load is abnormal to the boost drive protection module, so that the boost drive protection module adjusts the second duty cycle of the gate of the boost switch transistor in the boost circuit to a first target value according to the abnormal information at a second preset step size.

[0080] It should be noted that the boost circuit safety management method in this application is the same as the principle executed by the safety management system in the above Figures 2 to 4 embodiment, and will not be elaborated here.

[0081] An embodiment of the present application further provides an electronic device, including the boost circuit safety management system in any of the above embodiments.

[0082] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, and the computer program is set to execute the steps in any of the above embodiments of the boost circuit safety management method when running.

[0083] In an exemplary embodiment, the above computer-readable storage medium may include, but is not limited to: USB flash drive, read-only memory (abbreviated as ROM), random access memory (abbreviated as RAM), mobile hard disk, magnetic disk or optical disc, etc., various media that can store computer programs.

[0084] An embodiment of the present application further provides a computer program product, the above computer program product includes a computer program, and when the computer program is executed by a processor, it implements the steps in any of the above embodiments of the boost circuit safety management method.

[0085] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the steps in any of the above embodiments of the boost circuit safety management method.

[0086] Those skilled in the art may further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0087] The above has introduced in detail a boost circuit safety management system and method provided by this application. Specific examples are used herein to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A boost circuit safety management system, characterized in that Comprising: A boost circuit and a safety management system; The boost circuit is connected to the safety management system; The boost circuit includes an input switching transistor for controlling the on / off of the input power supply and the boost circuit; The safety management system is configured to obtain operating parameters in the boost circuit and perform a safety detection on the boost circuit based on the operating parameters. When the safety detection result is abnormal, the first duty cycle of the gate of the input switching transistor is adjusted to a first target value to control the disconnection of the input switching transistor using the first duty cycle.

2. The system according to claim 1, characterized in that, The safety management system includes: An input protection control module; The input protection control module is connected to the gate of the input switching transistor; The input protection control module is configured to obtain the operating parameters of the boost circuit. When the operating parameters are not within a first preset safety range, it determines that the safety detection result of the boost circuit is abnormal and adjusts the first duty cycle to the first target value. The operating parameters include the input voltage and the input current.

3. The system according to claim 2, wherein The input protection control module is further configured to: When the input power supply is connected and conducting to the boost circuit, adjust the first duty cycle to a second target value in accordance with a first preset step size to control the input switching transistor to conduct using the first duty cycle.

4. The system according to claim 2, wherein The safety management system further includes: A monitoring and prediction module; The monitoring and prediction module is connected to the input protection control module; The input protection control module is configured to determine that a first status signal is a low-level signal and transmit the first status signal to the monitoring and prediction module when the operating parameters are not within the first preset safety range; The input protection control module is configured to determine that the first status signal is a high-level signal and transmit the first status signal to the monitoring and prediction module when the operating parameters are within the first preset safety range.

5. The system according to claim 4, wherein The boost circuit further includes: A boost switching transistor for controlling the on / off of the boost circuit; The safety management system is configured to obtain operating parameters in the boost circuit and perform a safety detection on the boost circuit based on the operating parameters. When the safety detection result is abnormal, the second duty cycle of the gate of the boost switching transistor is adjusted to a first target value to control the disconnection of the boost switching transistor using the second duty cycle.

6. The system according to claim 5, wherein The safety management system further includes: A boost drive protection module; The boost drive protection module is connected to the gate of the boost switching transistor; The boost drive protection module is configured to obtain the operating parameters of the boost circuit. When the operating parameters are not within a second preset safety range, it determines that the safety detection result of the boost circuit is abnormal and adjusts the second duty cycle to the first target value. The operating parameters include the input voltage, the output voltage, the input current, and the output current.

7. The system according to claim 6, characterized in that, The boost drive protection module is further configured to: When the operating parameters are not within the second preset safety range, store the operating parameters in a preset storage space in the boost drive protection module.

8. The system according to claim 6, wherein The safety management system further includes: A monitoring and prediction module; The monitoring and prediction module is connected to the boost drive protection module; The boost driving protection module is used to determine that the second status signal is a low-level signal when the operating parameter is not within the second preset safety range, and transmit the second status signal to the monitoring and prediction module; The boost driving protection module is used to determine that the second status signal is a high-level signal when the operating parameter is within the second preset safety range, and transmit the second status signal to the monitoring and prediction module.

9. The system according to any one of claims 4 or 8, characterized in that The monitoring and prediction module is used for: Obtaining the first status signal sent by the input protection control module, and sending a control signal to the boost driving protection module based on the first status signal, or obtaining the second status signal sent by the boost driving protection module, and sending a control signal to the input protection control module based on the second status signal.

10. The system according to claim 9, characterized in that The monitoring and prediction module is used for: Obtaining the first status signal output by the input protection control module, and when it is determined that the first status signal is a high-level signal, sending a high-level control signal to the boost driving protection module, so that the boost driving protection module adjusts the second duty ratio of the gate of the boost switch tube in the boost circuit to a second target value based on the high-level control signal, or Obtaining the second status signal output by the boost driving protection module, and when the second status signal is a low level, sending a low-level control signal to the input protection control module, so that the input protection control module adjusts the first duty ratio of the gate of the input switch tube to the first target value based on the low-level control signal.

11. The system according to claim 5, wherein The safety management system further includes: A sampling module; The sampling module is respectively connected to the boost circuit and the monitoring and prediction module; The sampling module is used to obtain the operating parameters of the boost circuit and send the operating parameters to the monitoring and prediction module, and the operating parameters include output voltage, output current, and the voltage and current between the source and drain of the boost switch tube.

12. The system according to claim 11, wherein The monitoring and prediction module is further used for: Predicting the health status of the boost circuit based on the operating parameters, and sending the health status to the boost driving protection module.

13. The system according to claim 12, wherein The monitoring and prediction module is further used for: Determining the on-resistance of the boost switch tube according to the voltage and current between the source and drain; Determining whether the boost switch tube is about to fail according to the on-resistance of the boost switch tube; When it is determined that the boost switch tube is about to fail, sending the failure information that the boost switch tube is about to fail to the boost driving protection module, so that the boost driving protection module adjusts the second duty ratio of the gate of the boost switch tube in the boost circuit to the first target value according to the failure information at a second preset step size.

14. The system according to claim 12, wherein The monitoring and prediction module is further used for: Determining whether the load of the boost circuit is abnormal according to the output voltage and the output current; When the load is abnormal, sending the abnormal information of the load to the boost driving protection module, so that the boost driving protection module adjusts the second duty ratio of the gate of the boost switch tube in the boost circuit to the first target value according to the abnormal information at a second preset step size.

15. A method for safety management of a boost circuit, characterized in that, The method is applied to the security management system in the boost circuit security management system described in any one of claims 1-14, and includes: Obtaining the operating parameters in the boost circuit, and performing security detection on the boost circuit according to the operating parameters, where the boost circuit is connected to the security management system; When the security detection result is abnormal, adjusting the first duty cycle of the gate of the input switching transistor in the boost circuit to a first target value, so as to control the disconnection of the input switching transistor by using the first duty cycle, and the input switching transistor is used to control the on / off of the input power supply and the boost circuit.

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