Starting control method and apparatus for voltage conditioning circuit, and computer device

Abstract

The present application relates to a starting control method and apparatus for a voltage conditioning circuit, and a computer device, a storage medium and a computer program product. The method comprises: acquiring an initial set voltage, which is smaller than a stable output voltage of a voltage conditioning circuit; acquiring an output voltage of the voltage conditioning circuit; if the output voltage of the voltage conditioning circuit is not equal to a target voltage, updating the initial set voltage on the basis of a voltage stepping value; and obtaining a starting control signal for the voltage conditioning circuit on the basis of the initial set voltage, the output voltage of the voltage conditioning circuit, and an output current of the voltage conditioning circuit, wherein the starting control signal is used for controlling a switching tube of the voltage conditioning circuit to operate. During a starting process of the voltage conditioning circuit, the difference between the initial set voltage and the output voltage of the voltage conditioning circuit can be maintained within a certain range by means of gradually increasing the value of the initial set voltage, so that no overcurrent occurs in an output end of the voltage conditioning circuit, thereby ensuring the performance of the circuit.

Description

Startup control method and device for voltage conditioning circuit and computer equipment Technical Field

[0001] The present application relates to the technical field of step-down conversion circuits, and in particular to a startup control method, apparatus, computer equipment, storage medium, and computer program product for a voltage conditioning circuit. Background Art

[0002] The buck circuit is a commonly used step-down DC regulated power supply circuit for voltage conditioning, typically converting a high voltage to a lower voltage. This circuit utilizes PWM technology to control the inductor and switching transistors to maintain the output voltage within a stable range. In addition to its voltage regulation performance, the buck circuit also offers advantages such as high efficiency and compact size, making it widely used in various electronic devices.

[0003] However, when the buck circuit starts, in order to achieve the set output voltage, the duty cycle of the switch tube in the buck circuit will be very large. At this time, overcurrent will occur at the output end of the buck circuit, which can easily cause damage to the switch tube in the buck circuit or damage to the load, affecting the performance of the circuit. Summary of the Invention

[0004] Based on this, it is necessary to provide a startup control method, device, computer equipment, computer-readable storage medium and computer program product for a voltage conditioning circuit to address the technical problem that the above-mentioned existing BUCK circuit has output overcurrent during the startup process, which causes damage to the switch tube or capacitive load.

[0005] In a first aspect, the present application provides a startup control method for a voltage conditioning circuit, comprising:

[0006] Obtaining a starting set voltage; the starting set voltage is less than a stable output voltage of the voltage conditioning circuit;

[0007] Obtain the output voltage of the voltage conditioning circuit;

[0008] If the output voltage of the voltage conditioning circuit is not equal to the target voltage, the initial set voltage is updated according to the voltage step value;

[0009] A start-up control signal of the voltage conditioning circuit is obtained according to the initial setting voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit; the start-up control signal is used to control the operation of the switch tube of the voltage conditioning circuit.

[0010] In one embodiment, updating the initial set voltage according to the voltage step value includes:

[0011] Determine whether the sum of the voltage step value and the initial set voltage is less than the target voltage;

[0012] If yes, the starting set voltage is updated to the sum of the voltage step value and the starting set voltage;

[0013] If not, the initial set voltage value is updated to the target voltage value.

[0014] In one embodiment, after obtaining the output voltage of the voltage conditioning circuit and before updating the initial set voltage according to the voltage step value, the method further includes:

[0015] If the output voltage of the voltage conditioning circuit is not equal to the target voltage, determining whether the sum of the output voltage of the voltage conditioning circuit and a preset error threshold is less than a preset target voltage;

[0016] If not, executing the step of updating the initial set voltage according to the voltage step value;

[0017] If so, the step of obtaining a start-up control signal of the voltage conditioning circuit according to the initial setting voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit is performed.

[0018] In one embodiment, obtaining a start-up control signal of the voltage conditioning circuit according to the initial set voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit includes:

[0019] The output value of the voltage outer loop is obtained according to the initial set voltage and the output voltage of the voltage conditioning circuit;

[0020] A start-up control signal of the voltage conditioning circuit is obtained according to the output value of the voltage outer loop and the output current of the voltage conditioning circuit.

[0021] In one embodiment, obtaining a start-up control signal of the voltage conditioning circuit according to an output value of the voltage outer loop and an output current of the voltage conditioning circuit includes:

[0022] If the output value of the voltage outer loop is greater than the current limit value, a start-up control signal of the voltage conditioning circuit is obtained according to the current limit value and the output current of the voltage conditioning circuit;

[0023] If the output value of the voltage outer loop is less than the current limit value, a start-up control signal of the voltage conditioning circuit is obtained according to the output value of the voltage outer loop and the output current of the voltage conditioning circuit.

[0024] In one embodiment, obtaining the initial set voltage includes:

[0025] When it is detected that the output switch tube of the voltage conditioning circuit is turned on, the initial set voltage is obtained.

[0026] In a second aspect, the present application further provides a startup control device for a voltage conditioning circuit, comprising:

[0027] An initial setting voltage acquisition module is used to acquire an initial setting voltage, where the initial setting voltage is less than a stable output voltage of a voltage conditioning circuit;

[0028] An output voltage acquisition module, used to obtain the output voltage of the voltage conditioning circuit;

[0029] An initial setting voltage update module is used to update the initial setting voltage according to the voltage step value if the output voltage of the voltage conditioning circuit is not equal to the target voltage;

[0030] The startup control module is used to obtain a startup control signal of the voltage conditioning circuit according to the starting set voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit; the startup control signal is used to control the operation of the switch tube of the voltage conditioning circuit.

[0031] In a third aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0032] Obtaining a starting set voltage; the starting set voltage is less than a stable output voltage of the voltage conditioning circuit;

[0033] Obtain the output voltage of the voltage conditioning circuit;

[0034] If the output voltage of the voltage conditioning circuit is not equal to the target voltage, the initial set voltage is updated according to the voltage step value;

[0035] A start-up control signal of the voltage conditioning circuit is obtained according to the initial setting voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit; the start-up control signal is used to control the operation of the switch tube of the voltage conditioning circuit.

[0036] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0037] Obtaining a starting set voltage; the starting set voltage is less than a stable output voltage of the voltage conditioning circuit;

[0038] Obtain the output voltage of the voltage conditioning circuit;

[0039] If the output voltage of the voltage conditioning circuit is not equal to the target voltage, the initial set voltage is updated according to the voltage step value;

[0040] A start-up control signal of the voltage conditioning circuit is obtained according to the initial setting voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit; the start-up control signal is used to control the operation of the switch tube of the voltage conditioning circuit.

[0041] In a fifth aspect, the present application further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the following steps:

[0042] Obtaining a starting set voltage; the starting set voltage is less than a stable output voltage of the voltage conditioning circuit;

[0043] Obtain the output voltage of the voltage conditioning circuit;

[0044] If the output voltage of the voltage conditioning circuit is not equal to the target voltage, the initial set voltage is updated according to the voltage step value;

[0045] A start-up control signal of the voltage conditioning circuit is obtained according to the initial setting voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit; the start-up control signal is used to control the operation of the switch tube of the voltage conditioning circuit.

[0046] The startup control method, device, computer equipment, storage medium, and computer program product for the voltage conditioning circuit described above include obtaining a starting set voltage, where the starting set voltage is less than the stable output voltage of the voltage conditioning circuit; obtaining the output voltage of the voltage conditioning circuit, and if the output voltage of the voltage conditioning circuit is not equal to the target voltage, updating the starting set voltage according to the voltage step value; and obtaining a startup control signal for the voltage conditioning circuit based on the starting set voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit. The startup control signal is used to control the operation of the switch tube of the voltage conditioning circuit. During the startup process of the voltage conditioning circuit, the startup control method of the voltage conditioning circuit updates the smaller starting set voltage according to the step value, so that the difference between the starting set voltage and the actual output voltage of the voltage conditioning circuit can be kept within a certain range, thereby preventing overcurrent from occurring at the output end of the voltage conditioning circuit and ensuring the performance of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] FIG1 is a diagram illustrating an application environment of a startup control method for a voltage conditioning circuit according to an embodiment;

[0049] FIG2 is a schematic flow chart of a startup control method of a voltage conditioning circuit in one embodiment;

[0050] FIG3 is a flow chart of a startup control method of a voltage conditioning circuit in another embodiment;

[0051] FIG4 is a flow chart of a startup control method of a voltage conditioning circuit in yet another embodiment;

[0052] FIG5 is a flow chart of a startup control method of a voltage conditioning circuit in yet another embodiment;

[0053] FIG6 is a schematic flow chart of a startup control method of a voltage conditioning circuit in another embodiment;

[0054] FIG7 is a flow chart of a startup control method of a voltage conditioning circuit in yet another embodiment;

[0055] FIG8 is a schematic diagram of the waveforms of the output voltage and output current of a conventional voltage conditioning circuit;

[0056] FIG9 is a schematic diagram of waveforms of output voltage and output current of a voltage conditioning circuit according to an embodiment;

[0057] FIG10 is a schematic diagram of waveforms of output voltage and output current of a voltage conditioning circuit in another embodiment;

[0058] FIG11 is a flow chart of a startup control method of a voltage conditioning circuit in yet another embodiment;

[0059] FIG12 is a structural block diagram of a startup control device of a voltage conditioning circuit in one embodiment;

[0060] FIG13 is a diagram showing the internal structure of an electronic device in one embodiment. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0062] The startup control method for a voltage conditioning circuit provided in an embodiment of the present application can be applied to a controller as shown in Figure 1. Figure 1 shows the specific structure of the voltage conditioning circuit, wherein the first terminal of the controller is connected to the output terminal of the voltage conditioning circuit and can obtain the output voltage and output current of the voltage conditioning circuit. The second terminal of the controller is connected to the switch tube G1 and the switch tube G2 in the voltage conditioning circuit and can control the operation of the switch tube G1 and the switch tube G2.

[0063] In an exemplary embodiment, as shown in FIG2 , a startup control method for a voltage conditioning circuit is provided, which is described by taking the method applied to the controller in FIG1 as an example, and includes the following steps 202 to 208 . Among them:

[0064] Step 202: Obtain an initial set voltage.

[0065] The initial set voltage is lower than the stable output voltage of the voltage conditioning circuit. The stable output voltage of the voltage conditioning circuit is the output voltage when the voltage conditioning circuit enters a stable operating state after startup. Specifically, the initial set voltage can be set by a person skilled in the art. For example, the initial set voltage can be set to 2V.

[0066] Step 204: Obtain the output voltage of the voltage conditioning circuit.

[0067] 1 , the output voltage Uo of the voltage conditioning circuit may be the voltage across capacitor C1. Specifically, the output terminal of the voltage conditioning circuit may be sampled in real time to obtain the real-time output voltage of the voltage conditioning circuit.

[0068] Step 206 : If the output voltage of the voltage conditioning circuit is not equal to the target voltage, the initial setting voltage is updated according to the voltage step value.

[0069] The target voltage represents the voltage value that the output of the voltage conditioning circuit needs to reach and can be equal to the stable output voltage of the voltage conditioning circuit. The voltage step value can be set by those skilled in the art. For example, the voltage step value can be set to 2V.

[0070] For example, if the output voltage of the voltage conditioning circuit is not equal to the target voltage, the starting set voltage value may be increased by a single voltage step value, such that the updated starting set voltage value is the sum of the starting set voltage value before the update and the single voltage step value. Furthermore, when the difference between the output voltage of the voltage conditioning circuit and the target voltage exceeds a preset threshold range, the starting set voltage value may be increased by multiple voltage step values, such that the updated starting set voltage value is the sum of the starting set voltage value before the update and the multiple voltage step values, thereby improving the response speed of the voltage conditioning circuit and thereby enhancing the startup control efficiency of the voltage conditioning circuit.

[0071] Step 208 : obtaining a start-up control signal of the voltage conditioning circuit according to the initial setting voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit.

[0072] The output current of the voltage conditioning circuit can also be obtained by real-time current sampling at the output end of the voltage conditioning circuit. The startup control signal is used to control the operation of the switch tube of the voltage conditioning circuit. Specifically, the reference current of the voltage conditioning circuit can be obtained based on the starting set voltage and the output voltage of the voltage conditioning circuit. Then, the startup control signal of the voltage conditioning circuit can be obtained based on the reference current of the voltage conditioning circuit and the output current of the voltage conditioning circuit. Referring to Figure 1, the switch tube G1 and the switch tube G2 in the voltage conditioning circuit are alternately turned on or off under the control of the startup control signal, thereby controlling the voltage at the output end of the voltage conditioning circuit.

[0073] The startup control method for the voltage conditioning circuit described above includes obtaining a starting set voltage, wherein the starting set voltage is less than the stable output voltage of the voltage conditioning circuit; obtaining the output voltage of the voltage conditioning circuit, and if the output voltage of the voltage conditioning circuit is not equal to the target voltage, updating the starting set voltage according to the voltage step value. A startup control signal for the voltage conditioning circuit is obtained based on the starting set voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit. The startup control signal is used to control the operation of the switch tube of the voltage conditioning circuit. During the startup process of the voltage conditioning circuit, the startup control method for the voltage conditioning circuit gradually increases the value of the starting set voltage, so that the difference between the starting set voltage and the output voltage of the voltage conditioning circuit is kept within a certain range, thereby preventing overcurrent from occurring at the output end of the voltage conditioning circuit, thereby ensuring the performance of the circuit.

[0074] In an exemplary embodiment, as shown in FIG. 3 , step 206 includes steps 302 to 306 .

[0075] Step 302 , determining whether the sum of the voltage step value and the initial set voltage is less than the target voltage.

[0076] Specifically, when the sum of the voltage step value and the initial setting voltage is less than the target voltage, step 304 is executed; when the sum of the voltage step value and the initial setting voltage is greater than or equal to the target voltage, step 306 is executed.

[0077] Step 304 : Update the initial set voltage to the sum of the voltage step value and the initial set voltage.

[0078] Step 306: Update the initial set voltage value to the target voltage value.

[0079] In this embodiment, by judging whether the sum of the voltage step value and the starting set voltage is less than the target voltage, and updating the starting set voltage when the sum of the voltage step value and the starting set voltage is less than the target voltage, the target output voltage of the voltage conditioning circuit can be reduced, thereby reducing the difference between the voltage at the output end of the voltage conditioning circuit and the voltage across the load, avoiding the occurrence of overcurrent, and ensuring the performance of the voltage conditioning circuit.

[0080] In an exemplary embodiment, as shown in FIG. 4 , after step 204 and before step 206 , the startup control method of the voltage conditioning circuit further includes step 402 .

[0081] Step 402: If the output voltage of the voltage conditioning circuit is not equal to the target voltage, determine whether the sum of the output voltage of the voltage conditioning circuit and the preset error threshold is less than the preset target voltage. If so, execute step 208; otherwise, execute step 206.

[0082] The preset target voltage can be obtained according to the preset starting target voltage and the preset target voltage step value. As the output voltage of the voltage conditioning circuit increases, the preset target voltage will also gradually increase.

[0083] Exemplarily, after obtaining the first output voltage of the voltage conditioning circuit in the current control cycle, if the first output voltage of the voltage conditioning circuit is not equal to the target voltage, a determination is made as to whether the sum of the first output voltage of the voltage conditioning circuit and a preset error threshold is less than the preset target voltage. In this case, the preset target voltage may be a preset starting target voltage. If so, the starting set voltage is updated according to the voltage step value; otherwise, the starting set voltage is not updated. A start control signal for the voltage conditioning circuit is then derived based on the updated starting set voltage or the unupdated starting set voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit. Under control of the start control signal, the voltage at the output of the voltage conditioning circuit changes. The next control cycle then begins, and the second output voltage of the voltage conditioning circuit is obtained. If the second output voltage of the voltage conditioning circuit is not equal to the target voltage, the preset target voltage is updated to the sum of the preset target voltage of the previous control cycle and the preset target voltage step value. Subsequent steps are then performed until the voltage conditioning circuit meets stable operation conditions, i.e., the output voltage of the voltage conditioning circuit is equal to the target voltage. In a more detailed embodiment, the preset error threshold may be 0.5V, and the preset starting target voltage may be 2V.

[0084] In this embodiment, after obtaining the output voltage of the voltage conditioning circuit, before updating the starting set voltage according to the voltage step value, when the output voltage of the voltage conditioning circuit is not equal to the target voltage, it is determined whether the sum of the output voltage of the voltage conditioning circuit and the preset error threshold is less than the preset target voltage, and when the sum of the output voltage of the voltage conditioning circuit and the preset error threshold is greater than or equal to the preset target voltage, the starting set voltage is updated according to the voltage step value, thereby achieving timely updating of the starting set voltage to improve the efficiency of the startup control of the voltage conditioning circuit.

[0085] In an exemplary embodiment, as shown in FIG. 5 , step 208 includes step 502 and step 504 .

[0086] Step 502 : obtaining an output value of the voltage outer loop according to the initial set voltage and the output voltage of the voltage conditioning circuit.

[0087] The voltage conditioning circuit startup control method provided in this embodiment can employ a dual-loop PI correction strategy, comprising an outer voltage loop and an inner current loop. Specifically, the initial set voltage can serve as a reference voltage for the outer voltage loop. The output voltage of the voltage conditioning circuit can serve as a voltage feedback signal for the outer voltage loop. The outer voltage loop can obtain an output value based on the reference voltage and the voltage feedback signal. The output value of the outer voltage loop can serve as an input for the inner current loop.

[0088] Step 504 : obtaining a start-up control signal of the voltage conditioning circuit according to the output value of the voltage outer loop and the output current of the voltage conditioning circuit.

[0089] Among them, the output value of the voltage outer loop can be used as the reference current of the current inner loop, the output current of the voltage conditioning circuit can be used as the current feedback signal of the current inner loop, and the output value of the current inner loop is the start-up control signal of the voltage conditioning circuit.

[0090] In this embodiment, by adopting the inner and outer double-loop PI correction strategy of the voltage outer loop and the current inner loop, the sensitivity of the startup control of the voltage conditioning circuit can be improved, thereby further improving the startup control efficiency of the voltage conditioning circuit.

[0091] In an exemplary embodiment, as shown in FIG. 6 , step 504 includes step 602 and step 604 .

[0092] Step 602: If the output value of the voltage outer loop is greater than the current limit value, a start-up control signal of the voltage conditioning circuit is obtained according to the current limit value and the output current of the voltage conditioning circuit.

[0093] Specifically, when the output value of the outer voltage loop exceeds the current limit, the current limit is used as a reference current for the inner current loop to limit the output current of the voltage conditioning circuit, further preventing overcurrent. In a more detailed embodiment, the current limit can be 1 / 3 of the rated current of the switch in the voltage conditioning circuit.

[0094] Step 604 : If the output value of the voltage outer loop is less than the current limit value, a start-up control signal of the voltage conditioning circuit is obtained according to the output value of the voltage outer loop and the output current of the voltage conditioning circuit.

[0095] Specifically, when the output value of the voltage outer loop is less than or equal to the current limit value, the output value of the voltage outer loop is used as the reference current of the current inner loop, and then the start control signal of the voltage conditioning circuit is obtained according to the reference current and the output current of the step-down current.

[0096] In this embodiment, by setting a current limiting value and obtaining a startup control signal of the voltage conditioning circuit based on the current limiting value and the output current of the voltage conditioning circuit when the output value of the voltage outer loop is greater than the current limiting value, the voltage conditioning circuit can be further prevented from overcurrent during the startup process, thereby causing damage to the switch tube of the voltage conditioning circuit or damage to the load, thereby ensuring the working performance of the voltage conditioning circuit.

[0097] In an exemplary embodiment, as shown in FIG. 7 , step 202 includes step 702 .

[0098] Step 702: When it is detected that the output switch of the voltage conditioning circuit is turned on, an initial set voltage is obtained.

[0099] The output switching transistors of the voltage conditioning circuit may be switching transistors G1 and G2 in Figure 1 . When switching transistors G1 and G2 are turned on, the current flowing through coil L in Figure 1 increases, and the current at the output terminal of the step-down current increases. Therefore, when the increase in current at the output terminal of the step-down current is detected, a starting set voltage can be obtained, and then startup control of the voltage conditioning circuit can be performed according to the startup control method for a voltage conditioning circuit in any of the above-described embodiments to prevent overcurrent.

[0100] In this embodiment, when it is detected that the output switch tube of the voltage conditioning circuit is turned on, the initial set voltage is obtained, and then the voltage conditioning circuit is started and controlled, thereby saving resources.

[0101] To facilitate understanding of the startup control method of the voltage conditioning circuit, a specific embodiment is provided below for illustration. The voltage conditioning circuit in this embodiment is a BUCK circuit, and FIG1 shows the specific structure of the BUCK circuit.

[0102] In a conventional buck circuit output, if there is a large capacitor at the output end or the load is a capacitive load, a large current will be output to charge the capacitor during the startup of the buck circuit, which is the overcurrent phenomenon mentioned above. However, this can easily cause damage to the output switch tube or the load. Specifically, the output voltage and output current waveforms of a conventional buck circuit during startup can be referred to in Figure 8. The target voltage in Figure 8 is the output voltage of the buck circuit when it is operating stably, that is, the stable output voltage mentioned in the above embodiment. It can be seen from Figure 8 that the output current has a large spike. The reason for this spike current is that in order to achieve the set target voltage at the output end of the buck circuit, the duty cycle of the switch tube in the buck circuit is very large. At this time, the voltage at the output end of the buck circuit increases. In conjunction with Figure 1, the voltage across capacitor C1 increases. However, when the load is capacitor C2, at the moment capacitor C2 is connected, the difference between the voltage across capacitor C2 and the voltage across capacitor C1 is relatively large, which leads to the appearance of a spike current.

[0103] In order to avoid the occurrence of peak current, an embodiment of the present application provides a startup control method for a voltage conditioning circuit, which adopts a dual-loop control strategy, an outer voltage loop, an inner current loop, and a given soft start for the outer loop, that is, a given starting set voltage, thereby avoiding the phenomenon of instantaneous current surge. Exemplarily, after adopting a dual-loop control strategy and a startup control method with a given soft start for the outer loop, the waveforms of the output voltage and output current of the BUCK circuit can be referred to Figure 9. As can be seen from Figure 9, the starting set voltage of the outer voltage loop gradually increases with a step value of 2V until it reaches the target voltage value, thereby keeping the difference between the actual output voltage of the BUCK circuit and the starting set voltage within a certain range, thereby reducing the difference between capacitor C1 and capacitor C2 in the BUCK circuit and avoiding the occurrence of peak current.

[0104] Furthermore, the startup control method for the voltage conditioning circuit provided in this embodiment also adds a constant current inner loop, that is, the maximum value of the reference current of the current inner loop (corresponding to the current limit value mentioned above) is set to half the rated current of the switch tube in the buck circuit. In this way, when the buck circuit starts, a constant current charging phenomenon occurs under the action of the constant current inner loop, ensuring that the switch tube is not damaged and also allowing the buck circuit to start quickly. Among them, the output voltage and output current waveforms of the buck circuit after adding the constant current inner loop can be referred to in Figure 10. As can be seen from Figure 10, during the time period t1-t2, the output current operates within the allowable range and the load is charged with constant current in a constant current manner, causing the output voltage to rise rapidly.

[0105] As shown in FIG11 , the specific steps of the startup control method of the voltage conditioning circuit provided in this embodiment include:

[0106] 1. When it is detected that the output switch tube in the BUCK circuit is turned on, the starting set voltage is obtained and set to 2V.

[0107] 2. Perform voltage sampling on the output end of the BUCK circuit to obtain a sampled output voltage, and perform current sampling on the output end to obtain a sampled output current.

[0108] 3. The sampled output voltage is used as the voltage feedback signal of the voltage outer loop PI operation, and the starting set voltage is used as the reference voltage of the voltage outer loop PI operation.

[0109] 4. Determine whether the PI output of the outer voltage loop is greater than the current limit. If so, first update the PI output of the outer voltage loop to the current limit, and then use the updated PI output as the reference current for the inner current loop. If not, directly use the PI output of the outer voltage loop as the reference current for the inner current loop.

[0110] 5. The sampled output current obtained in step 1 is used as the current feedback signal for the current inner loop PI operation. A PWM (Pulse Width Modulation) signal is calculated and output based on this current feedback signal and the reference current obtained in step 4. The PWM signal is used to control the alternating on and off states of switches G1 and G2 in the buck circuit.

[0111] 6. Determine whether the current output voltage of the buck circuit is equal to the target voltage. If so, terminate startup control and stabilize the buck circuit. If not, further determine whether the value of the current output voltage plus 0.5V is greater than or equal to the preset target voltage. 0.5V corresponds to the preset error threshold in the above embodiment.

[0112] 6.1. If the current output voltage plus 0.5V is greater than or equal to the preset target voltage, further determine whether the current starting set voltage plus 2V is less than the target voltage. If so, update the starting set voltage to the current starting set voltage plus 2V, and return to step 1. If not, update the starting set voltage to the target voltage, and return to step 1. 2V corresponds to the voltage step value in the above embodiment.

[0113] 6.2. If the current output voltage + 0.5V is less than the preset target voltage, the initial set voltage will not be updated and the process will return to step 1.

[0114] The startup control method for a voltage conditioning circuit provided in this embodiment utilizes a cycle-by-cycle sampling dual closed-loop PI control strategy, namely, an outer voltage loop and an inner current loop. The reference voltage of the outer voltage loop is gradually increased in 2V steps to maintain the actual output voltage within two volts of the reference voltage. Furthermore, the maximum value of the reference current of the inner current loop is set within a safe range. Even if a rapid current increase is detected, the current loop can quickly activate, keeping the current within the allowable range and rapidly increasing the output voltage using a constant current. This method ensures safe startup control of the voltage conditioning circuit, with a fast response speed, and is independent of the capacitive load size, thus guaranteeing the performance of the voltage conditioning circuit.

[0115] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0116] Based on the same inventive concept, embodiments of the present application also provide a voltage conditioning circuit startup control device for implementing the aforementioned voltage conditioning circuit startup control method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the voltage conditioning circuit startup control device provided below can be found in the aforementioned limitations of the voltage conditioning circuit startup control method and will not be further elaborated here.

[0117] In an exemplary embodiment, as shown in FIG12 , a startup control device 900 for a voltage conditioning circuit is provided, comprising: an initial setting voltage acquisition module 901, an output voltage acquisition module 902, an initial setting voltage update module 903, and a startup control module 904, wherein:

[0118] An initial setting voltage acquisition module 901 is used to acquire an initial setting voltage, where the initial setting voltage is less than a stable output voltage of a voltage conditioning circuit;

[0119] An output voltage acquisition module 902 is used to obtain the output voltage of the voltage conditioning circuit;

[0120] An initial setting voltage updating module 903 is configured to update the initial setting voltage according to the voltage step value if the output voltage of the voltage conditioning circuit is not equal to the target voltage;

[0121] The startup control module 904 is used to obtain a startup control signal of the voltage conditioning circuit according to the initial setting voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit; the startup control signal is used to control the operation of the switch tube of the voltage conditioning circuit.

[0122] In an exemplary embodiment, the starting setting voltage update module 903 is also used to determine whether the sum of the voltage step value and the starting setting voltage is less than the target voltage; if so, the starting setting voltage is updated to the sum of the voltage step value and the starting setting voltage; if not, the value of the starting setting voltage is updated to the value of the target voltage.

[0123] In an exemplary embodiment, the startup control device 900 of the voltage conditioning circuit further includes an output voltage determination module, wherein:

[0124] The output voltage judgment module is used to determine whether the sum of the output voltage of the voltage conditioning circuit and a preset error threshold is less than the preset target voltage if the output voltage of the voltage conditioning circuit is not equal to the target voltage; if not, execute the step of updating the starting set voltage according to the voltage step value; if so, execute the step of obtaining a start control signal of the voltage conditioning circuit according to the starting set voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit.

[0125] In an exemplary embodiment, the startup control module 904 includes a voltage outer loop calculation unit and a current inner loop calculation unit, wherein:

[0126] The voltage outer loop calculation unit is used to obtain the output value of the voltage outer loop according to the initial set voltage and the output voltage of the voltage conditioning circuit.

[0127] The current inner loop calculation unit is used to obtain a start-up control signal of the voltage conditioning circuit according to the output value of the voltage outer loop and the output current of the voltage conditioning circuit.

[0128] In an exemplary embodiment, the current inner loop calculation unit is also used to obtain a start-up control signal of the voltage conditioning circuit based on the current limiting value and the output current of the voltage conditioning circuit if the output value of the voltage outer loop is greater than the current limiting value; if the output value of the voltage outer loop is less than the current limiting value, obtain a start-up control signal of the voltage conditioning circuit based on the output value of the voltage outer loop and the output current of the voltage conditioning circuit.

[0129] In an exemplary embodiment, the initial setting voltage acquisition module 901 is further configured to acquire the initial setting voltage when it is detected that the output switch tube of the voltage conditioning circuit is turned on.

[0130] Each module in the startup control device for the voltage conditioning circuit described above may be implemented in whole or in part via software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in hardware form, or may be stored in a computer device memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0131] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure may be shown in Figure 13. The computer device includes a processor, memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are connected to the system bus via the input / output interface. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and computer program stored in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals via wired or wireless communication, and the wireless communication may be achieved via Wi-Fi, a mobile cellular network, NFC (near field communication), or other technologies. When executed by the processor, the computer program implements a method for controlling startup of a voltage conditioning circuit. The display unit of the computer device is used to produce a visual image and may be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device casing, or an external keyboard, touchpad or mouse.

[0132] Those skilled in the art will understand that the structure shown in FIG13 is merely a block diagram of a portion of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0133] In an exemplary embodiment, a computer device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0134] In an exemplary embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0135] In an exemplary embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0136] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the above-described method embodiments. Any reference to a memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), data processing logic devices based on quantum computing, and the like.

[0137] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0138] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A startup control method for a voltage conditioning circuit, characterized in that: The method comprises: Obtaining a starting set voltage; the starting set voltage being less than a stable output voltage of a voltage conditioning circuit; Obtaining an output voltage of the voltage conditioning circuit; If the output voltage of the voltage conditioning circuit is not equal to the target voltage, updating the initial setting voltage according to the voltage step value; A start control signal of the voltage conditioning circuit is obtained according to the initial setting voltage, the output voltage of the voltage conditioning circuit and the output current of the voltage conditioning circuit; the start control signal is used to control the operation of the switch tube of the voltage conditioning circuit.

2. The method according to claim 1, characterized in that The updating of the initial setting voltage according to the voltage step value comprises: Determining whether the sum of the voltage step value and the initial set voltage is less than the target voltage; If yes, then updating the initial setting voltage to the sum of the voltage step value and the initial setting voltage; If not, the value of the initial setting voltage is updated to the value of the target voltage.

3. The method according to claim 1, characterized in that After acquiring the output voltage of the voltage conditioning circuit and before updating the initial setting voltage according to the voltage step value, the method further includes: If the output voltage of the voltage conditioning circuit is not equal to the target voltage, determining whether the sum of the output voltage of the voltage conditioning circuit and a preset error threshold is less than a preset target voltage; If not, executing the step of updating the initial setting voltage according to the voltage step value; If yes, the step of obtaining a start-up control signal of the voltage conditioning circuit according to the initial setting voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit is performed.

4. The method according to claim 1, characterized in that: The step of obtaining a start control signal of the voltage conditioning circuit according to the initial setting voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit comprises: Obtaining an output value of the voltage outer loop according to the initial setting voltage and the output voltage of the voltage conditioning circuit; A start-up control signal of the voltage conditioning circuit is obtained according to the output value of the voltage outer loop and the output current of the voltage conditioning circuit.

5. The method according to claim 4, characterized in that The step of obtaining a start-up control signal of the voltage conditioning circuit according to the output value of the voltage outer loop and the output current of the voltage conditioning circuit comprises: If the output value of the voltage outer loop is greater than the current limiting value, a start control signal of the voltage conditioning circuit is obtained according to the current limiting value and the output current of the voltage conditioning circuit; If the output value of the voltage outer loop is less than the current limiting value, a start-up control signal of the voltage conditioning circuit is obtained according to the output value of the voltage outer loop and the output current of the voltage conditioning circuit.

6. The method according to claim 1, characterized in that The obtaining of the initial setting voltage comprises: When it is detected that the output switch tube of the voltage conditioning circuit is turned on, the initial setting voltage is obtained.

7. A startup control device for a voltage conditioning circuit, characterized in that: The device comprises: A starting setting voltage acquisition module, used for acquiring a starting setting voltage, wherein the starting setting voltage is less than a stable output voltage of a voltage conditioning circuit; An output voltage acquisition module, used to acquire the output voltage of the voltage conditioning circuit; An initial setting voltage updating module, used for updating the initial setting voltage according to a voltage step value if the output voltage of the voltage conditioning circuit is not equal to the target voltage; A startup control module is used to obtain a startup control signal of the voltage conditioning circuit according to the starting set voltage, the output voltage of the voltage conditioning circuit, and the output current of the voltage conditioning circuit; the startup control signal is used to control the operation of the switch tube of the voltage conditioning circuit.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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