Power supply control method, power supply control circuit, and electronic equipment

Abstract

The present application discloses a power supply control method, a power supply control circuit, and an electronic device. The power supply control method includes: obtaining the instantaneous value of the on-current in the voltage conversion circuit; integrating the instantaneous value of the on-current to obtain a charge integral; converting a pulse reference signal into a target charge; subtracting the charge integral from the target charge to obtain a charge error; adjusting a preset proportional coefficient and a preset integral coefficient in response to a level amplitude change of the pulse reference signal to obtain a proportional adjustment coefficient and an integral adjustment coefficient; using the proportional adjustment coefficient and the integral adjustment coefficient to proportionally and integrally adjust the charge error value to obtain a drive control signal, which is sent to the voltage conversion circuit to adjust the output current of the voltage conversion circuit. Through the above-mentioned manner, the power supply control method of the present application can effectively reduce the rise time and fall time of the output current, and achieve fast response within the full load range.

Description

Technical Field

[0001] The present application relates to the field of circuit control technology, and in particular to a power supply control method, a power supply control circuit, and an electronic device. Background Art

[0002] Nowadays, with the increasing number of electronic devices, the performance requirements for electronic device driving power supplies are becoming increasingly stringent. Especially in the power supply of high-power electronic devices, constant current or constant pulse current drive is required, and high requirements are placed on current rise time, fall time and current ripple.

[0003] However, related technologies typically use linear power supplies or switching power supplies. However, linear power supplies suffer from high power loss, poor device reliability, and limited output power. Switching power supplies also have current rise and fall times that are difficult to meet fast response requirements. Summary of the Invention

[0004] The main technical problem solved by this application is to provide a power supply control method, a power supply control circuit and an electronic device, which can solve the problems in related technologies such as large power loss of linear power supplies, poor equipment reliability, limited output power, and difficulty in quickly responding to current rise and fall times of switching power supplies.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a power supply control method, which is applied to the power supply control of a voltage conversion circuit, wherein the power supply control method includes: obtaining the instantaneous value of the on-current in the voltage conversion circuit; integrating the instantaneous value of the on-current to obtain the charge integral; obtaining a pulse reference signal, a preset proportional coefficient and a preset integral coefficient; converting the pulse reference signal into a target charge; subtracting the charge integral from the target charge to obtain a charge error value; adjusting the preset proportional coefficient and the preset integral coefficient in response to the level amplitude change of the pulse reference signal to obtain a proportional adjustment coefficient and an integral adjustment coefficient; using the proportional adjustment coefficient and the integral adjustment coefficient to proportionally and integrally adjust the charge error value to obtain a drive control signal; sending the drive control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change the switch state, thereby adjusting the output current of the voltage conversion circuit.

[0006] Among them, the steps of adjusting the preset proportional coefficient and the preset integral coefficient respectively in response to the level amplitude change of the pulse reference signal to obtain the proportional adjustment coefficient and the integral adjustment coefficient include: obtaining the rising edge of the pulse reference signal; multiplying the preset proportional coefficient by the first proportional rise factor in response to the rising edge to obtain the proportional adjustment coefficient; multiplying the preset integral coefficient by the first integral rise factor to obtain the integral adjustment coefficient.

[0007] Among them, the steps of adjusting the preset proportional coefficient and the preset integral coefficient in response to the level amplitude change of the pulse reference signal to obtain the proportional adjustment coefficient and the integral adjustment coefficient include: obtaining the falling edge of the pulse reference signal; multiplying the preset proportional coefficient by the first proportional reduction factor in response to the falling edge to obtain the proportional adjustment coefficient; multiplying the preset integral coefficient by the first integral reduction factor to obtain the integral adjustment coefficient.

[0008] Among them, the steps of adjusting the preset proportional coefficient and the preset integral coefficient respectively in response to the level amplitude change of the pulse reference signal to obtain the proportional adjustment coefficient and the integral adjustment coefficient include: obtaining the level change error value of the pulse reference signal; detecting whether the level change error value is within the preset error threshold range; if the level change error value is greater than the preset error threshold range; multiplying the preset proportional coefficient by the second proportional increase factor to obtain the proportional adjustment coefficient; multiplying the preset integral coefficient by the second integral increase factor to obtain the integral adjustment coefficient.

[0009] Among them, the step of multiplying the preset proportional coefficient by the second proportional increase factor to obtain the proportional adjustment coefficient includes: using the level change error value to obtain the proportional increase correction factor; wherein the proportional increase correction factor is positively correlated with the level change error value; after multiplying the preset proportional coefficient by the second proportional increase factor, multiplying it by the proportional increase correction factor to obtain the proportional adjustment coefficient.

[0010] The step of obtaining the rise correction factor by using the level change error value includes: performing calculation processing on the level change error value by using a preset correction function or a preset mapping relationship table to obtain a proportional rise correction factor and an integral rise correction factor.

[0011] Among them, the step of multiplying the preset integral coefficient by the second integral rise factor to obtain the integral adjustment coefficient includes: using the level change error value to obtain the integral rise correction factor; wherein the integral rise correction factor is positively correlated with the level change error value; after multiplying the preset integral coefficient by the second integral rise factor, multiplying it by the integral rise correction factor to obtain the integral adjustment coefficient.

[0012] Among them, the power control method also includes: if the level change error value is less than the preset error threshold range; multiplying the preset proportional coefficient by the second proportional reduction factor to obtain a proportional adjustment coefficient; multiplying the preset integral coefficient by the second integral reduction factor to obtain an integral adjustment coefficient.

[0013] Among them, the step of multiplying the preset proportional coefficient by the second proportional reduction factor to obtain the proportional adjustment coefficient includes: using the level change error value to obtain the proportional reduction correction factor; wherein the proportional reduction correction factor is positively correlated with the level change error value; after multiplying the preset proportional coefficient by the second proportional reduction factor, multiplying it by the proportional reduction correction factor to obtain the proportional adjustment coefficient.

[0014] Among them, the step of multiplying the preset integral coefficient by the second integral reduction factor to obtain the integral adjustment coefficient includes: using the level change error value to obtain the integral reduction correction factor; wherein the integral reduction correction factor is positively correlated with the level change error value; after multiplying the preset integral coefficient by the second integral reduction factor, multiplying it by the integral reduction correction factor to obtain the integral adjustment coefficient.

[0015] Among them, the steps of using the proportional adjustment coefficient and the integral adjustment coefficient to perform proportional-integral adjustment on the charge error value to obtain the drive control signal include: obtaining the output current; subtracting the output current from the pulse reference signal to obtain the current error value; using the current error value to obtain the proportional control factor coefficient and the integral control factor coefficient; wherein the proportional control factor coefficient and the integral control factor coefficient are both positively correlated with the current error value; multiplying the proportional adjustment coefficient by the proportional control factor coefficient to obtain the proportional control coefficient; multiplying the integral adjustment coefficient by the integral control factor coefficient to obtain the integral control coefficient; using the proportional control coefficient and the integral control coefficient to perform proportional-integral adjustment on the charge error value to obtain the drive control signal.

[0016] Among them, the proportional control factor coefficient includes an increasing proportional control factor coefficient and a decreasing proportional control factor coefficient, the proportional control coefficient includes an increasing proportional control coefficient and a decreasing proportional control coefficient, and the step of multiplying the proportional adjustment coefficient by the proportional control factor coefficient to obtain the proportional control coefficient includes: in response to an increase in the current error value, multiplying the proportional adjustment coefficient by the increasing proportional control factor coefficient to obtain the increasing proportional control coefficient; in response to a decrease in the current error value, multiplying the proportional adjustment coefficient by the decreasing proportional control factor coefficient to obtain the decreasing proportional control coefficient.

[0017] Among them, the integral control factor coefficient includes an increasing integral control factor coefficient and a decreasing integral control factor coefficient, the integral control coefficient includes an increasing integral control coefficient and a decreasing integral control coefficient, and the step of multiplying the integral adjustment coefficient by the integral control factor coefficient to obtain the integral control coefficient includes: in response to an increase in the current error value, multiplying the integral adjustment coefficient by the increasing integral control factor coefficient to obtain the increasing integral control coefficient; in response to a decrease in the current error value, multiplying the integral adjustment coefficient by the decreasing integral control factor coefficient to obtain the decreasing integral control coefficient.

[0018] To solve the above technical problems, another technical solution adopted in this application is: to provide a power control circuit, wherein the power control circuit is coupled to a voltage conversion circuit; wherein the power control circuit adopts the power control method as described in any of the above items to control the power supply of the voltage conversion circuit.

[0019] In order to solve the above technical problems, another technical solution adopted in this application is: to provide an electronic device, wherein the electronic device includes a shell and a power control circuit connected to the shell; wherein the power control circuit is the power control circuit as described above.

[0020] The beneficial effects of the present application are as follows: Different from the prior art, the power supply control method provided by the present application obtains the instantaneous value of the on-current in the voltage conversion circuit, integrates the instantaneous value of the on-current to obtain a charge integral, obtains a pulse reference signal, a preset proportional coefficient, and a preset integral coefficient to convert the pulse reference signal into a target charge, subtracts the charge integral from the target charge to obtain a charge error value, and when the level amplitude of the pulse reference signal changes, adjusts the preset proportional coefficient and the preset integral coefficient respectively to obtain a proportional adjustment coefficient and an integral adjustment coefficient, and uses the proportional adjustment coefficient and the integral adjustment coefficient to perform proportional-integral adjustment on the charge error value to obtain a drive control signal, thereby being able to respond to changes in the level amplitude of the pulse reference signal, that is, when the load state changes, by adjusting the preset proportional coefficient and the preset integral coefficient, so that the drive control signal obtained thereby can more quickly adjust the output current of the voltage conversion circuit to the current amplitude range required by the changed load state, thereby effectively reducing the rise time and fall time of the output current, thereby achieving fast response within the full load range; and there is no need to operate the corresponding power device in the linear region, thereby reducing power loss, improving reliability, and eliminating the need to limit output power. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0022] Figure 1 This is a flow chart of the first embodiment of the power control method of the present application;

[0023] Figure 2 This is a schematic structural diagram of the first embodiment of the power supply control circuit of the present application;

[0024] Figure 3 yes Figure 1 S16 is a flow chart of the first embodiment;

[0025] Figure 4 yes Figure 1 S16 is a flow chart of the second embodiment;

[0026] Figure 5 yes Figure 1 S16 is a flow chart of the third embodiment;

[0027] Figure 6 This is a schematic structural diagram of a second embodiment of the power supply control circuit of the present application;

[0028] Figure 7 This is a schematic structural diagram of a third embodiment of the power supply control circuit of the present application;

[0029] Figure 8 yes Figure 5 A flow chart of an embodiment of S1633;

[0030] Figure 9 yes Figure 5 A flow chart of an embodiment of S1634;

[0031] Figure 10 yes Figure 5 A flow chart of an embodiment of S1636;

[0032] Figure 11 yes Figure 5 A schematic diagram of a flow chart of an embodiment of S1637;

[0033] Figure 12 yes Figure 1 A schematic diagram of a flow chart of an embodiment of S17;

[0034] Figure 13 yes Figure 12 A schematic diagram of a flow chart of an embodiment of S174;

[0035] Figure 14 yes Figure 12 A schematic diagram of a flow chart of an embodiment of S175;

[0036] Figure 15 It is a structural diagram of an embodiment of the electronic device of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] The terms "first," "second," and "third" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features identified. Therefore, features specified as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional designations (such as up, down, left, right, front, back, etc.) in the embodiments of this application are intended only to illustrate the relative positional relationships and movement of components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional designations will also change accordingly. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to such process, method, product, or apparatus.

[0039] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The present application is described in detail below with reference to the accompanying drawings and implementation methods.

[0041] Please refer to Figure 1 and Figure 2 ,in, Figure 1 This is a flow chart of the first embodiment of the power control method of the present application. Figure 2 This is a schematic diagram of the structure of the first embodiment of the power control circuit of the present application. Specifically, it can include the following steps:

[0042] S11: Obtain the instantaneous value of the on-current in the voltage conversion circuit.

[0043] It is understandable that the power control method in this embodiment is specifically applied to Figure 2 The power control of the first voltage conversion circuit 30 is shown; wherein the first power control circuit 20 is coupled to the first voltage conversion circuit 30, and the power control method described in any one of the items herein is used to implement power control on the first voltage conversion circuit 30.

[0044] It is worth noting that the first voltage conversion circuit 30 can specifically be a single-phase BUCK circuit (step-down conversion circuit), a multi-phase BUCK circuit or a BOOST circuit (boost conversion circuit), or any other reasonable circuit topology, and this embodiment does not impose any restrictions on this.

[0045] In some embodiments, the first power control circuit 20 may specifically include a control chip, a DSP (Digital Signal Processing) chip, an MCU (Micro Controller Unit) circuit, a CPU (Central Processing Unit), a single-chip microcomputer, a field programmable gate array, a programmable logic device, a discrete gate or transistor logic device, discrete hardware, and any other reasonable circuit unit with signal processing function, and this application does not limit this.

[0046] Furthermore, the term "coupled" as used herein encompasses both direct and indirect connection methods. Therefore, if a first circuit is described as being coupled to a second circuit, this means that the first circuit may be directly connected to the second circuit via electrical connection, wireless transmission, optical transmission, or other signal connection methods, or may be indirectly connected to the second circuit via other circuits or connection methods.

[0047] Specifically, the first power supply control circuit 20 monitors in real time the instantaneous current amplitude of the switch element inside the first voltage conversion circuit 30 when it is triggered to turn on, that is, the instantaneous value of the on-current Iphase.

[0048] The instantaneous value of the on-state current Iphase can be obtained by any reasonable sampling method such as a high-precision current sensor, a resistor, a Hall sensor, or circuit model estimation, and this application does not impose any limitation on this.

[0049] S12: Integrate the instantaneous value of the on-current to obtain the charge integral.

[0050] The instantaneous value of the on-state current Iphase is integrated within one cycle to obtain the charge integral Qphase within the cycle, that is, Qphase=∫Iphase dt.

[0051] S13: Obtain a pulse reference signal, a preset proportional coefficient, and a preset integral coefficient.

[0052] For the specific working conditions and power supply requirements of the load circuit, a set of appropriate PI (Proportional Integral) reference values, i.e., a preset proportional coefficient kp0 and a preset integral coefficient ki0, are obtained through experimental calibration or simulation optimization, and a reference pulse current is set, or a reference pulse current, a preset proportional coefficient kp0 and a preset integral coefficient ki0 are received from a host computer, so that the first voltage conversion circuit 30 has excellent current rise time and current fall time under the working conditions.

[0053] The reference pulse current may specifically be a periodic pulse waveform or other forms of reference signals.

[0054] It is worth noting that in order to ensure that the first voltage conversion circuit 30 can respond quickly to obtain sufficiently short current rise time and fall time when any output current Io jumps, the PI parameters should be adjusted according to the current load state, and first obtain the PI reference value with the load state changing from no-load to full load as a reference, and adjust the PI reference value in response to changes in other load states.

[0055] The host computer typically refers to a computer system with powerful computing and data processing capabilities. It is responsible for monitoring the entire control system, issuing commands, collecting data, processing and analyzing data, and interacting with the user. As the "brain" of the system, the host computer is capable of processing complex algorithms, storing long-term data, and providing a graphical user interface.

[0056] A slave computer is a device or controller directly connected to hardware such as sensors and actuators in a control system. It is responsible for executing specific control instructions from the master computer, such as outputting switch signals, adjusting analog quantities, and collecting data. Slave computers typically perform simple logic analysis and real-time control tasks.

[0057] S14: Convert the pulse reference signal into a target charge amount.

[0058] The pulse reference signal Iref is integrated within one cycle to obtain the corresponding target charge amount Qref.

[0059] S15: Subtract the charge integral from the target charge to obtain a charge error value.

[0060] The charge integral Qphase is subtracted from the target charge Qref to calculate the charge error Qer between the actual charge and the target charge, that is, Qer=Qref-Qphase.

[0061] S16: In response to the level amplitude change of the pulse reference signal, the preset proportional coefficient and the preset integral coefficient are adjusted to obtain a proportional adjustment coefficient and an integral adjustment coefficient respectively.

[0062] When it is detected that the amplitude of the pulse reference signal Iref changes, for example, it jumps from a low level to a high level, or from a high level to a low level, the preset proportional coefficient kp0 is adjusted according to the change amplitude to obtain the proportional adjustment coefficient kpt, and the preset integral coefficient ki0 is adjusted to obtain the integral adjustment coefficient kit.

[0063] Among them, the adjustment function or mapping relationship corresponding to the adjustment of the preset proportional coefficient kp0 and the preset integral coefficient ki0 can be specifically a linear or nonlinear mapping; and when the amplitude of the pulse reference signal Iref changes by the same amplitude but in a different direction, that is, jumping from a low level to a high level, the adjustment function or mapping relationship corresponding to jumping from a high level to a low level is different.

[0064] It is worth noting that the load states of the first voltage conversion circuit 30 generally include no load, light load, full load, and overload. No load refers to the operating state of the device or system without any load connected; the load is significantly lower than the rated capacity, and the specific ratio varies by application, generally referring to a load factor of less than 30% of the rated power (or less than 50% in some scenarios); full load refers to a load close to or equal to the rated capacity, such as when the generator output power is consistent with the nameplate nominal value; and overload refers to a load exceeding the rated capacity.

[0065] In addition, load rate is a core parameter that measures the relationship between the actual operating load of a device or system and its rated capacity. Its definition and calculation method vary depending on the application field.

[0066] ‌General definition: Load factor = actual load / rated load * 100%. This applies to scenarios such as transformers, motors, and power systems. For example, the load factor of a transformer is the ratio of its output apparent power to its rated capacity.

[0067] In which, the level amplitude of the pulse reference signal Iref is determined by the current load state, and its level amplitude is different corresponding to different load states; or it can be understood that under different load rates of the first voltage conversion circuit 30, the pulse reference signal Iref has different level amplitudes, and the level amplitude of the pulse reference signal Iref and the load rate satisfy a specific functional relationship or mapping relationship.

[0068] The change in the level amplitude of the pulse reference signal Iref corresponds to a change in the load state of the first voltage conversion circuit 30, such as a change from no-load to light-load, or from light-load to overload, or from full-load to no-load, or any other reasonable state change; it can also correspond to a load rate change from 0 to 30%, or from 20% to 80%, or from 100% to 50%, or any other reasonable change amplitude, and this application does not limit this.

[0069] S17: Perform proportional-integral regulation on the charge error value using the proportional regulation coefficient and the integral regulation coefficient to obtain a drive control signal.

[0070] The updated proportional adjustment coefficient kpt and integral adjustment coefficient kit are used to perform proportional-integral adjustment on the charge error value Qer to output a reference signal for modulating the duty cycle, namely, the drive control signal PWM.

[0071] In some embodiments, the drive control signal PWM may specifically be one or more of any reasonable control signals such as a PWM (Pulse Width Modulation) signal or a PFM (Pulse Frequency Modulation) signal, and this application does not limit this.

[0072] S18: Sending a driving control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change the switch state, thereby adjusting the output current of the voltage conversion circuit.

[0073] The driving control signal PWM is sent to the first voltage conversion circuit 30 to control the switch element in the first voltage conversion circuit 30 to be turned on or off, thereby adjusting the output current Io to make it close to the reference waveform.

[0074] In the above scheme, in response to the change in the level amplitude of the pulse reference signal Iref, that is, when the load state changes, by adjusting the preset proportional coefficient kp0 and the preset integral coefficient ki0, the drive control signal PWM obtained thereby can more quickly adjust the output current Io of the first voltage conversion circuit 30 to the current amplitude range required by the changed load state, so as to effectively reduce the rise time and fall time of the output current Io, thereby achieving a fast response within the full load range; and there is no need to make the corresponding power device operate in the linear region, the power loss is low, the reliability is good, and the output power does not need to be limited.

[0075] Moreover, by adopting the first voltage conversion circuit 30 under charge control, the power supply response speed can be effectively improved by directly implementing closed-loop control of the charge amount using the principle of charge control while reducing the ripple of the output current Io; combined with a dynamic PI controller, appropriate PI parameters are adjusted according to different output currents Io and pulse stages, that is, different pulse reference signals Iref, so that the first voltage conversion circuit 30 can respond quickly to any load mutation within the full load range, and the first voltage conversion circuit 30 has sufficiently short current rise time and fall time while reducing output overshoot.

[0076] Real-time adjustment of PI parameters based on changes in the reference signal amplitude improves system response speed and stability under sudden load changes. Automatic optimization of control parameters during switching between light and heavy loads balances efficiency and output accuracy. Charge error-based closed-loop control, adaptive parameter adjustment to reference signal variations, more stable and efficient current regulation, and support for a variety of topologies and complex load requirements. This highly flexible, responsive, and stable control solution is ideal for the design and implementation of modern, high-performance power management systems.

[0077] Please continue reading Figure 3 , Figure 3 yes Figure 1 In one embodiment, the power control method of the present application includes, in addition to the above steps S11-S18, further including some more specific steps. Specifically, the above step S16 may further include the following steps:

[0078] S1611: Obtain the rising edge of the pulse reference signal.

[0079] It can be understood that the pulse reference signal Iref has a transition from a low level to a high level, ie, a rising edge, and a transition from a high level to a low level, ie, a falling edge.

[0080] Specifically, the first power supply control circuit 20 identifies and detects the rising edge of the pulse reference signal Iref. For example, this goal can be achieved through any reasonable method such as a hardware circuit (such as an edge trigger) or a software algorithm (for example, writing corresponding code in an embedded system) or a controller counter, and this application does not limit this.

[0081] S1612: In response to the rising edge, multiply the preset proportional coefficient by the first proportional increase factor to obtain a proportional adjustment coefficient.

[0082] When the rising edge of the pulse reference signal Iref is detected, the preset proportional coefficient kp0 is multiplied by the first proportional increase factor bs1 to obtain the proportional adjustment coefficient kpt, ie, kpt=kp0*bs1.

[0083] S1613: Multiply the preset integral coefficient by the first integral increase factor to obtain an integral adjustment coefficient.

[0084] The integral adjustment coefficient kit is calculated by multiplying the preset integral coefficient ki0 by the first integral rise factor js1, that is, kit=ki0*js1.

[0085] In some embodiments, the first proportional increase factor bs1 and the first integral increase factor js1 can be the same or different; and the first proportional increase factor bs1 and the first integral increase factor js1 can be different in response to the level change amplitude of the pulse reference signal Iref, that is, the difference between the level amplitude of the pulse reference signal Iref before the step change and the level amplitude after the step change, or they can be the same, and can be specifically obtained by fitting and setting based on simulation prediction or experimental optimization, and this application does not limit this.

[0086] Please continue reading Figure 4 , Figure 4 yes Figure 1 In one embodiment, the power control method of the present application includes, in addition to the above steps S11-S18, further including some more specific steps. Specifically, the above step S16 may further include the following steps:

[0087] S1621: Get the falling edge of the pulse reference signal.

[0088] Specifically, the first power supply control circuit 20 identifies and detects the falling edge of the pulse reference signal Iref. For example, this goal can be achieved through any reasonable method such as a hardware circuit (such as an edge trigger) or a software algorithm (for example, writing corresponding code in an embedded system) or a controller counter, and this application does not limit this.

[0089] S1622: In response to the falling edge, multiply the preset proportional coefficient by the first proportional reduction factor to obtain a proportional adjustment coefficient.

[0090] Similarly, when the falling edge of the pulse reference signal Iref is detected, the preset proportional coefficient kp0 is multiplied by the first proportional reduction factor bj1 to obtain the proportional adjustment coefficient kpt, ie, kpt=Iref*bj1.

[0091] S1623: Multiply the preset integral coefficient by the first integral reduction factor to obtain an integral adjustment coefficient.

[0092] The integral adjustment coefficient kit is calculated by multiplying the preset integral coefficient ki0 by the first integral reduction factor jj1, that is, kit=ki0*jj1.

[0093] In some embodiments, when the currently acquired level change error value Ver is the same, the first proportional reduction factor bj1 is different from the first proportional increase factor bs1, and the first integral reduction factor jj1 is different from the first integral increase factor js1.

[0094] In some embodiments, the first proportional reduction factor bj1 and the first integral reduction factor jj1 can be the same or different; and the first proportional reduction factor bj1 and the first integral reduction factor jj1 can be different in response to the level change amplitude of the pulse reference signal Iref, that is, the difference between the level amplitude of the pulse reference signal Iref before the step change and the level amplitude after the step change, or they can be the same, and can be specifically obtained by fitting and setting based on simulation prediction or experimental optimization, and this application does not limit this.

[0095] When the falling edge of the driving control signal PWM is detected, the charge integration value Qphase is reset to zero, waiting for the next rising edge to re-integrate the instantaneous value of the conduction current Iphase.

[0096] See also Figure 5 , Figure 5 yes Figure 1 In one embodiment, the power control method of the present application includes, in addition to the above steps S11-S18, further including some more specific steps. Specifically, the above step S16 may further include the following steps:

[0097] S1631: Obtain the level change error value of the pulse reference signal.

[0098] Please continue reading Figure 6 , Figure 6 It is a structural diagram of the second embodiment of the power control circuit of the present application.

[0099] It is understandable that the power control method in this embodiment can specifically be that the second power control circuit 40 controls the Figure 6 The second voltage conversion circuit 50 shown in the figure realizes current regulation. The second voltage conversion circuit 50 includes a switch subcircuit 51 and a regulation output subcircuit 52; the switch subcircuit 51 includes a first upper switch tube Q H 1 and the first down-converter switch Q L 1, the regulating output sub-circuit 52 includes a first capacitor C1, a second capacitor C2, a first upper diode D H 1. The first down diode D L 1. The first inductor L1 and the output capacitor Co correspond to a single-phase buck circuit.

[0100] The first terminal of the first capacitor C1 is coupled to the first upper switch transistor Q H 1, and is used to couple with the first end of the DC power supply DC, the second end of the first capacitor C1 is coupled to the first end of the second capacitor C2, the first upper diode Q H 1 and the first lower diode Q L1, and the second end of the second capacitor C2 is coupled to the first down-converter switch Q L 1, and is used to couple with the second end of the DC power supply DC and be grounded, the first upper switch tube Q H The second end of 1 is coupled to the first upper diode D H 1 and the first end of the first inductor L1, the second end of the first inductor L1 is coupled to the first end of the output capacitor Co and is used to couple with the first end of the equivalent series diode Do in the load circuit 101, the first down-converter switch Q L The second end of 1 is coupled to the first upper diode D H 1 and the second end of the output capacitor Co, and is used to be coupled to the second end of the equivalent series diode Do in the load circuit 101.

[0101] In other embodiments, the load circuit 101 may further include one or more of any reasonable circuit elements such as an equivalent resistor, an equivalent capacitor, an equivalent series diode, etc., and this application does not limit this.

[0102] The second power supply control circuit 40 specifically includes a charge sampling integration circuit 41 and a dynamic control circuit 42. The charge sampling integration circuit 41 further includes a current sampling circuit 411, a charge integration circuit 412, and a charge feedback control circuit 413. The current sampling circuit 411 is coupled to the first upper switch tube Q H 1 and / or the first down-converting switch Q L 1, and coupled to the charge integration circuit 412, the charge integration circuit 412 is coupled to the charge feedback control circuit 413, the charge feedback control circuit 413 is coupled to the dynamic control circuit 42, the first upper diode D H 1 and the third terminal of the first down diode D L 1's third end.

[0103] In some embodiments, the first upper switch tube Q H 1. The first down-converter switch Q L Specifically, it can be a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), a triode, a thin film transistor, a field effect transistor, or any other reasonable switch tube, which is not limited in this application.

[0104] Please continue reading Figure 7 , Figure 7 It is a structural diagram of the third embodiment of the first power control circuit of the present application.

[0105] In other embodiments, the second voltage conversion circuit 50 may be a multi-phase BUCK circuit, that is, the switch sub-circuit 51 may include a first upper switch tube Q H 1. The second upper switch tube Q H 2. ..., nth upper switch tube Q H n (n is an integer greater than 1), the first down-converter switch Q L 1. The second bottom switch tube Q L 2. ..., nth bottom switch tube Q L The regulating output subcircuit 52 includes a first capacitor C1, a second capacitor C2, a first upper diode D H 1. The second upper diode D H 2. ..., nth upper diode D H n, the first down diode D L 1. The second bottom diode D L 2. ..., nth bottom diode D L n, first inductor L1, second inductor L2, ..., nth inductor Ln, output capacitor Co.

[0106] The first terminal of the first capacitor C1 is coupled to the first upper switch transistor Q H 1, the first end, the second upper switch tube Q H 2, ..., the nth upper switch tube Q H The first end of n is coupled to the first end of the DC power supply DC, the second end of the first capacitor C1 is coupled to the first end of the second capacitor C2, the first upper diode D H 1, the first end, the second upper diode D H 2, ..., the nth upper diode D H n and the first down diode D L 1, the second lower diode D L 2, ..., the nth bottom diode D L The second end of the second capacitor C2 is coupled to the first down-converter switch Q L The first end of 1 and the second bottom switch tube Q L 2, ..., the nth bottom switch tube Q L n, and is used to couple with the second end of the DC power supply DC and be grounded, the first upper switch tube Q H The second end of 1, the second upper switch tube Q H 2, ..., the nth upper switch tube Q H The second end of n is respectively coupled to the first upper diode D H 1, the second upper diode DH 2, ..., the nth upper diode D H n and the first end of the first inductor L1, the first end of the second inductor L2, ..., the first end of the nth inductor Ln. The second end of the first inductor L1 is coupled to the second end of the second inductor L2, ..., the second end of the nth inductor Ln and the first end of the output capacitor Co, and is used to couple to the first end of the equivalent series diode Do in the load circuit 101. The first down-converter switch Q L The second end of 1, the second bottom switch tube Q L The second end of 2, ..., the nth bottom switch tube Q L The second end of n is respectively coupled to the first upper diode D H 1, the first end, the second upper diode D H 2, ..., the nth upper diode D H n and the second end of the output capacitor Co, and is used to be coupled to the second end of the equivalent series diode Do in the load circuit 101.

[0107] Of course, in other embodiments, the second voltage conversion circuit 50 may be a multi-phase interleaved BOOST circuit (boost conversion circuit), a single-phase BOOST circuit or other circuit topologies, which is not limited in this embodiment.

[0108] For ease of understanding, the second voltage conversion circuit 50 is taken as a single-phase BUCK circuit as an example for explanation. The dynamic control circuit 42 sets the pulse reference signal Iref, or receives the pulse reference signal Iref sent by the host computer, so as to detect the level amplitude change of the pulse reference signal Iref in real time, so as to calculate the level change error value Ver between the level amplitude V1 before the step change and the level amplitude V2 after the step change of the pulse reference signal Iref, that is, Ver=V2-V1.

[0109] Among them, the host computer can be specifically understood as a system processor that monitors and controls the working status and application scenarios of the load circuit to determine the current power supply requirements of the load circuit, such as the load circuit's requirements for output power or output current Io, and then sets the pulse reference signal Iref.

[0110] S1632: Detect whether the level change error value is within a preset error threshold range.

[0111] It's worth noting that in some application scenarios, to ensure better power supply quality, increases and decreases in the pulse reference signal Iref's amplitude will correspond to different PI parameters. For example, when the first voltage conversion circuit 30 is specifically powering a laser pump source, because the load characteristics of the laser pump source are equivalent to a model consisting of multiple ideal diodes in series with a resistor, unlike a constant-voltage output power supply, the output voltage Vo of the first voltage conversion circuit 30 will change under different output currents Io. Therefore, for a laser pump source driven by pulsed current, the first voltage conversion circuit 30 has different demagnetization voltages during the rising and falling phases of the current pulse signal. Specifically, when the input voltage Vin remains unchanged, the output voltage Vo is low during the rising phase of the current pulse signal, and the demagnetization voltage Vc is equal to the input voltage Vin minus the output voltage Vo, i.e., Vc = Vin-Vo, which is relatively large. During the falling phase of the current pulse signal, the output voltage Vo is high, and the demagnetization voltage Vc is equal to the input voltage Vin minus the output voltage Vo, which is relatively small.

[0112] Therefore, if the same set of PI parameters is used to adjust the rising or falling phase of the current pulse signal, it will inevitably lead to a current rising slope that is too large, resulting in current overshoot, or a current falling slope that is too small, resulting in a current falling time that is too long. Either result is an undesirable situation in the field of laser power supply.

[0113] It can be seen from this that after obtaining the level change error value Ver, it is necessary to further distinguish between positive and negative values ​​to determine the current change trend of the pulse reference signal Iref.

[0114] It is understandable that the preset error threshold range is a level amplitude range reasonably set to distinguish whether the pulse reference signal Iref increases in a positive direction, decreases in a negative direction, or remains unchanged within a relatively stable threshold range.

[0115] Specifically, the dynamic control circuit 42 is used to detect whether the currently acquired level change error value Ver is within a preset error threshold range, so that when it is detected that the level change error value Ver is greater than the preset error threshold range, it is determined that the pulse reference signal Iref increases in a positive direction, that is, the current pulse signal step change is in the rising stage; when it is detected that the level change error value Ver is less than the preset error threshold range, it is determined that the pulse reference signal Iref decreases in a negative direction, that is, the current pulse signal step change is in the falling stage; when it is detected that the level change error value Ver is within the preset error threshold range, it is determined that the pulse reference signal Iref remains unchanged, that is, the current pulse signal does not undergo a step change.

[0116] In some embodiments, the upper limit value of the preset error threshold range is equal to the absolute value of its lower limit value, and is 5%-10% of the maximum value of the external input pulse reference signal Iref, that is, 5%-10% of the pulse reference signal Iref obtained when the current load state is full load, and preferably 6% of the maximum value of the pulse reference signal Iref. This application does not limit this.

[0117] If the level change error value Ver is greater than the preset error threshold range, execute S1633; if the level change error value Ver is within the preset error threshold range, execute S1635; if the level change error value Ver is less than the preset error threshold range, execute S1637.

[0118] S1633: Multiply the preset proportional coefficient by the second proportional increase factor to obtain a proportional adjustment coefficient.

[0119] Specifically, the current sampling circuit 411 is used to monitor in real time the instantaneous current amplitude of the switch element inside the first voltage conversion circuit 30 when it is triggered to turn on, so as to obtain the instantaneous value of the on-state current Iphase.

[0120] The charge integration circuit 412 integrates the instantaneous value of the on-state current Iphase within one cycle to obtain the charge integration value Qphase within the cycle.

[0121] The charge feedback control circuit 413 obtains a set of appropriate PI reference values, namely, a preset proportional coefficient kp0, a preset integral coefficient ki0, through experimental calibration or simulation optimization, and sets the pulse reference current Iref, or receives the pulse reference current Iref, the preset proportional coefficient kp0 and the preset integral coefficient ki0 input by the host computer.

[0122] Furthermore, when the charge feedback control circuit 413 determines using the dynamic control circuit 42 that the currently acquired level change error value Ver is greater than the preset error threshold range, it multiplies the preset proportional coefficient kp0 by the second proportional increase factor bs2 to obtain the proportional adjustment coefficient kpt, that is, kpt=kp0*bs2.

[0123] S1634: Multiply the preset integral coefficient by the second integral increase factor to obtain an integral adjustment coefficient.

[0124] The charge feedback control circuit 413 multiplies the preset proportional coefficient kp0 by the second proportional increase factor bs2 to obtain the proportional adjustment coefficient kpt, ie, kpt=kp0*bs2.

[0125] In some embodiments, the second proportional increase factor bs2 and the second integral increase factor js2 can be the same or different; and the second proportional increase factor bs2 and the second integral increase factor js2 can be different in response to the level change amplitude of the pulse reference signal Iref, that is, the difference between the level amplitude of the pulse reference signal Iref before the step change and the level amplitude after the step change, or they can be the same, and can be specifically obtained by fitting and setting based on simulation prediction or experimental optimization, and this application does not limit this.

[0126] S1635: Assign the preset proportional coefficient and the preset integral coefficient to the proportional adjustment coefficient and the integral adjustment coefficient respectively.

[0127] When the charge feedback control circuit 413 determines that the currently acquired level change error value Ver is within the preset error threshold range, it assigns the preset proportional coefficient kp0 and the preset integral coefficient ki0 to the proportional adjustment coefficient kpt and the integral adjustment coefficient kit respectively, that is, the current PI parameters are maintained unchanged and are the PI reference values, and the proportional adjustment coefficient kpt is equal to the preset proportional coefficient kp0, and the integral adjustment coefficient kit is equal to the preset integral coefficient ki0.

[0128] S1636: Multiply the preset proportional coefficient by the second proportional reduction factor to obtain a proportional adjustment coefficient.

[0129] When the charge feedback control circuit 413 determines that the currently acquired level change error value Ver is smaller than the preset error threshold range, it multiplies the preset proportional coefficient kp0 by the second proportional reduction factor bj2 to obtain the proportional adjustment coefficient kpt, ie, kpt=kp0*bj2.

[0130] S1637: Multiply the preset integral coefficient by the second integral reduction factor to obtain an integral adjustment coefficient.

[0131] The charge feedback control circuit 413 multiplies the preset integral coefficient ki0 by the second integral reduction factor jj2 to obtain the integral adjustment coefficient kit, ie, kit=ki0*jj2.

[0132] In some embodiments, when the currently acquired level change error value Ver is the same, the second proportional reduction factor bj2 is different from the second proportional increase factor bs2, and the second integral reduction factor jj2 is different from the second integral increase factor js2.

[0133] In some embodiments, the second proportional increase factor bs2 and the second integral increase factor js2 can be the same or different; and the second proportional increase factor bs2 and the second integral increase factor js2 can be different in response to the level change amplitude of the pulse reference signal Iref, that is, the difference between the level amplitude of the pulse reference signal Iref before the step change and the level amplitude after the step change, or they can be the same, and can be specifically obtained by fitting and setting based on simulation prediction or experimental optimization, and this application does not limit this.

[0134] It is understandable that the charge feedback control circuit 413 is also used to integrate the pulse reference signal Iref within one cycle to obtain the corresponding target charge amount Qref, and subtract the charge integration amount Qphase from the target charge amount Qref to calculate the error between the actual charge and the target charge, that is, the charge error value Qer.

[0135] Furthermore, the charge feedback control circuit 413 uses the currently updated proportional adjustment coefficient kpt and integral adjustment coefficient kit to perform proportional-integral adjustment on the charge error value Qer to output a reference signal for modulating the duty cycle, i.e., the drive control signal PWM, and sends the drive control signal PWM to the first upper switch tube Q H 1 and the first down-converter switch Q L 1, thereby adjusting the output current Io.

[0136] The second voltage conversion circuit 50 is a multi-phase BUCK circuit, and the charge feedback control circuit 413 is used to send the drive control signal PWM to the first upper switch tube Q H 1. The second upper switch tube Q H 2. ..., nth upper switch tube Q H n, the first down-converter switch Q L 1. The second bottom switch tube Q L 2. ..., nth bottom switch tube Q L n, in order to adjust the output current Io.

[0137] It can be understood that, through the above method, the charge feedback control circuit 413 can dynamically adjust the duty cycle of the drive control signal PWM, and can quickly and stably respond to the sudden change of the output current Io in both the rising and falling stages of the pulse reference signal Iref, so that the second voltage conversion circuit 50 has a sufficiently short current rise time and fall time.

[0138] It is worth noting that different switching tubes receive different driving control signals PWM, and there is a specific phase difference, which will not be elaborated here.

[0139] Furthermore, in one embodiment, the above S1632 may further specifically include: detecting whether the absolute value of the level change error value Ver is greater than a preset error value, and detecting whether the level change error value Ver is greater than zero.

[0140] It is understandable that the preset error value is the upper limit of the preset error threshold range, that is, 5%-10% of the maximum value of the pulse reference signal Iref, and preferably 6% of the maximum value of the pulse reference signal Iref.

[0141] Among them, if the absolute value of the level change error value Ver is greater than the error preset value and greater than zero, execute S1633; if the absolute value of the level change error value Ver is less than or equal to the error preset value, execute S1635; if the absolute value of the level change error value Ver is greater than the error preset value and less than zero, execute S1637.

[0142] Please continue reading Figure 8 , Figure 8 yes Figure 5 In one embodiment, the power control method of the present application includes not only S1631 to S1637 above, but also some more specific steps. Specifically, S1633 above may further include the following steps:

[0143] S16331: Use the level change error value to obtain the proportional increase correction factor.

[0144] It is understandable that when the step change amplitude of the pulse reference signal Iref, that is, the level change error value Ver, is different, different PI control parameters will correspond. After the preset proportional coefficient kp0 and the preset integral coefficient ki0 are adjusted in response to the rise or fall of the pulse reference signal Iref, they need to be further corrected again corresponding to the different level change error values ​​Ver.

[0145] Specifically, the charge feedback control circuit 413 calculates or searches a preset mapping table to obtain the scale-up correction factor bsz in response to the currently acquired level change error value Ver.

[0146] In some embodiments, the proportional increase correction factor bsz is positively correlated with the level change error value Ver, that is, when the level change error value Ver is larger, the proportional increase correction factor bsz is also larger; when the level change error value Ver is smaller, the proportional increase correction factor bsz is also smaller; and the proportional increase correction factor bsz can specifically be in any reasonable proportional relationship with the level change error value Ver, such as a linear function, a first-order nonlinear function, a second-order nonlinear function, an arithmetic function or a specific mapping relationship, and this application does not limit this.

[0147] S16332: Multiply the preset proportional coefficient by the second proportional increase factor, and then multiply by the proportional increase correction factor to obtain the proportional adjustment coefficient.

[0148] The charge feedback control circuit 413 multiplies the preset proportional coefficient kp0 by the second proportional increase factor bs2 and then by the proportional increase correction factor bsz to obtain the proportional adjustment coefficient kpt, ie, kpt=kp0*bs2*bsz.

[0149] Furthermore, in one embodiment, the above-mentioned S16331 may specifically include: using a preset correction function or a preset mapping relationship table to perform calculation processing on the level change error value Ver to obtain a proportional increase correction factor bsz.

[0150] It is understandable that the preset correction function or preset mapping relationship table can be fitted through simulation prediction or experimental optimization, and the charge feedback control circuit 413 can specifically use the preset correction function to calculate the level change error value Ver to obtain the proportional increase correction factor bsz, or it can obtain the proportional increase correction factor bsz corresponding to the level change error value Ver by looking up the preset mapping relationship table.

[0151] Please continue reading Figure 9 , Figure 9 yes Figure 5 Flowchart of an embodiment of S1634 in FIG. In one embodiment, the power control method of the present application includes, in addition to the above S1631-S1637, further including some more specific steps. Specifically, the above S1634 may further include the following steps:

[0152] S16341: Use the level change error value to obtain the integral rise correction factor.

[0153] Similarly, the charge feedback control circuit 413 is further configured to calculate or search a preset mapping table to obtain an integral rise correction factor jsz according to the currently acquired level change error value Ver.

[0154] In some embodiments, the integral rise correction factor jsz is positively correlated with the level change error value Ver, that is, when the level change error value Ver is larger, the integral rise correction factor jsz is also larger; when the level change error value Ver is smaller, the integral rise correction factor jsz is also smaller; and the integral rise correction factor jsz can specifically be in any reasonable proportional relationship with the level change error value Ver, such as a linear function, a first-order nonlinear function, a second-order nonlinear function, an arithmetic function or a specific mapping relationship, and this application does not limit this.

[0155] S16342: Multiply the preset integral coefficient by the second integral increase factor, and then multiply by the integral increase correction factor to obtain the integral adjustment coefficient.

[0156] The charge feedback control circuit 413 multiplies the preset integral coefficient ki0 by the second integral rise factor js2 and then by the integral rise correction factor jsz to obtain the integral adjustment coefficient kit, ie, kit=ki0*js2*jsz.

[0157] Furthermore, in one embodiment, the above-mentioned S16341 may specifically further include: using a preset correction function or a preset mapping relationship table to perform calculation processing on the level change error value Ver to obtain an integral rise correction factor jsz.

[0158] It is understandable that the preset correction function or preset mapping relationship table can be specifically fitted through simulation prediction or experimental optimization, and the charge feedback control circuit 413 can specifically use the preset correction function to perform calculation processing on the level change error value Ver to obtain the integral rise correction factor jsz, or it can obtain the integral rise correction factor jsz corresponding to the level change error value Ver by looking up the preset mapping relationship table.

[0159] Please continue reading Figure 10 , Figure 10 yes Figure 5 In one embodiment, the power control method of the present application includes not only S1631 to S1637 above, but also some more specific steps. Specifically, S1636 above may further include the following steps:

[0160] S16361: Use the level change error value to obtain the proportional reduction correction factor.

[0161] Similarly, the charge feedback control circuit 413 is further configured to calculate or search a preset mapping table to obtain a proportional reduction correction factor bjz according to the currently acquired level change error value Ver.

[0162] In some embodiments, the proportional reduction correction factor bjz is positively correlated with the level change error value Ver, and the proportional reduction correction factor bjz can specifically be in any reasonable proportional relationship with the level change error value Ver, such as a linear function, a first-order nonlinear function, a second-order nonlinear function, an arithmetic function or a specific mapping relationship. This application does not limit this.

[0163] S16362: Multiply the preset proportional coefficient by the second proportional reduction factor, and then multiply by the proportional reduction correction factor to obtain the proportional adjustment coefficient.

[0164] The charge feedback control circuit 413 multiplies the preset proportional coefficient kp0 by the second proportional reduction factor bj2 and then by the proportional reduction correction factor bjz to obtain the proportional adjustment coefficient kpt, ie, kpt=kp0*bj2*bjz.

[0165] Furthermore, in one embodiment, the above-mentioned S16361 may specifically further include: using a preset correction function or a preset mapping relationship table to perform calculation processing on the level change error value Ver to obtain a proportional reduction correction factor bjz.

[0166] It is understandable that the preset correction function or the preset mapping relationship table can be specifically fitted through simulation prediction or experimental optimization, and the charge feedback control circuit 413 can specifically use the preset correction function to calculate the level change error value Ver to obtain the proportional reduction correction factor bjz, or it can obtain the proportional reduction correction factor bjz corresponding to the level change error value Ver by looking up the preset mapping relationship table.

[0167] Please continue reading Figure 11 , Figure 11 yes Figure 5 In one embodiment, the power control method of the present application includes not only S1631 to S1637 above, but also some more specific steps. Specifically, S1637 above may further include the following steps:

[0168] S16371: Use the level change error value to obtain the integral drop correction factor.

[0169] Similarly, the charge feedback control circuit 413 is further configured to calculate or search a preset mapping table to obtain an integral decrease correction factor jjz according to the currently acquired level change error value Ver.

[0170] In some embodiments, the integral decrease correction factor jjz is positively correlated with the level change error value Ver, and the integral decrease correction factor jjz can specifically be in any reasonable proportional relationship with the level change error value Ver, such as a linear function, a first-order nonlinear function, a second-order nonlinear function, an arithmetic function or a specific mapping relationship. This application does not limit this.

[0171] S16372: Multiply the preset integral coefficient by the second integral reduction factor, and then multiply by the integral reduction correction factor to obtain the integral adjustment coefficient.

[0172] The charge feedback control circuit 413 multiplies the preset integral coefficient ki0 by the second integral reduction factor jj2 and then by the integral reduction correction factor jjz to obtain the integral adjustment coefficient kit, ie, kit=ki0*jj2*jjz.

[0173] Furthermore, in one embodiment, the above-mentioned S16371 may specifically further include: using a preset correction function or a preset mapping relationship table to perform calculation processing on the level change error value Ver to obtain an integral decrease correction factor jjz.

[0174] It is understandable that the preset correction function or the preset mapping relationship table can be specifically fitted through simulation prediction or experimental optimization, and the charge feedback control circuit 413 can specifically use the preset correction function to perform calculation processing on the level change error value Ver to obtain the integral decrease correction factor jjz, or it can obtain the integral decrease correction factor jjz corresponding to the level change error value Ver by looking up the preset mapping relationship table.

[0175] In some embodiments, when the currently acquired level change error value Ver is the same, the proportional decrease correction factor bjz is different from the proportional increase correction factor bsz, and the integral decrease correction factor jjz is different from the integral increase correction factor jsz.

[0176] Please continue reading Figure 12 , Figure 12 yes Figure 1 In one embodiment, the power control method of the present application includes, in addition to the above steps S11-S18, further including some more specific steps. Specifically, the above step S17 may further include the following steps:

[0177] S171: Obtain output current.

[0178] Specifically, the first power control circuit 20 is used to sample the first voltage conversion circuit 30 to obtain its output current Io.

[0179] S172: Subtract the output current from the pulse reference signal to obtain a current error value.

[0180] The current error value Ier is calculated by subtracting the output current Io from the pulse reference signal Iref, that is, Ier=Iref-Io.

[0181] S173: Obtain a proportional control factor coefficient and an integral control factor coefficient using the current error value.

[0182] It is understandable that when the difference between the pulse reference signal Iref and the output current Io, i.e., the current error value Ier, is different, different PI control parameters will be used to ensure a good current rise time and current fall time. For example, for a single pulse rise phase or pulse fall phase, the proportional control factor coefficient bk0 and the integral control factor coefficient jk0 are time-varying. For the rising phase of the pulse reference signal Iref, when the difference between the pulse reference signal Iref and the output current Io at the initial moment is large, i.e., when the current error value Ier is large, a larger proportional control factor coefficient bk0 and an integral control factor coefficient jk0 need to be set to make the output current Io quickly approach the pulse reference signal Iref, thereby obtaining an optimal current rise time effect. At the end of the pulse step, the difference between the pulse reference signal Iref and the output current Io is small, i.e., the current error value Ier is small, and a smaller proportional adjustment coefficient kpt and integral adjustment coefficient kit need to be set so that the current output current Io can reach the pulse reference signal Iref through fine-tuning, thereby avoiding unnecessary current overshoot.

[0183] Therefore, after the preset proportional coefficient kp0 and the preset integral coefficient ki0 are adjusted in response to the rise or fall of the pulse reference signal Iref, they need to be further adjusted again corresponding to different current error values ​​Ier.

[0184] Specifically, the first power control circuit 20 performs corresponding function calculation or searches a mapping table on the currently acquired current error value Ier to obtain a proportional control factor coefficient bk0 and an integral control factor coefficient jk0.

[0185] In some embodiments, the proportional control factor coefficient bk0 and the integral control factor coefficient jk0 are both positively correlated with the current error value Ier, that is, when the current error value Ier is large, the proportional control factor coefficient bk0 and the integral control factor coefficient jk0 are also large; when the current error value Ier is small, the proportional control factor coefficient bk0 and the integral control factor coefficient jk0 are also small; and the proportional control factor coefficient bk0 and the integral control factor coefficient jk0 can specifically be in any reasonable proportional relationship with the current error value Ier, such as a linear function, a first-order nonlinear function, a second-order nonlinear function, an arithmetic function or a specific mapping relationship, and this application does not limit this.

[0186] S174: Multiply the proportional adjustment coefficient by the proportional control factor coefficient to obtain the proportional control coefficient.

[0187] Multiply the proportional adjustment coefficient kpt by the proportional control factor coefficient bk0 to obtain the proportional control coefficient kpz, that is, kpz=kpt*bk0.

[0188] S175: Multiply the integral adjustment coefficient by the integral control factor coefficient to obtain the integral control coefficient.

[0189] Multiply the integral adjustment coefficient kit by the integral control factor coefficient jk0 to obtain the integral control coefficient kiz, that is, kiz=kit*jk0.

[0190] S176: Using the proportional control coefficient and the integral control coefficient, the charge error value is proportionally and integrally adjusted to obtain a drive control signal.

[0191] The updated proportional control coefficient kpz and integral control coefficient kiz are used to perform proportional-integral adjustment on the charge error value Qer to update the reference signal of the output modulation duty cycle, that is, the drive control signal PWM.

[0192] Please continue reading Figure 13 , Figure 13 yes Figure 12 In one embodiment, the power control method of the present application includes, in addition to the above steps S171-S176, further including some more specific steps. Specifically, the above step S174 may further include the following steps:

[0193] S1741: In response to the current error value increasing, multiply the proportional adjustment coefficient by the increasing proportional control factor coefficient to obtain the increasing proportional control coefficient.

[0194] It is understandable that in some application scenarios, to ensure better power supply quality, increases and decreases in the pulse reference signal Iref's level amplitude will correspond to different PI parameters. Therefore, after obtaining the level change error value Ver, it is necessary to further distinguish between positive and negative values ​​to determine the current change trend of the pulse reference signal Iref.

[0195] The proportional control factor coefficient bk0 also includes an increasing proportional control factor coefficient sbk and a decreasing proportional control factor coefficient jbk, and the proportional control coefficient kpz includes an increasing proportional control coefficient skpz and a decreasing proportional control coefficient jkpz.

[0196] Specifically, the first power supply control circuit 20 detects the current error value Ier in real time, and when it is determined that the current error value Ier increases, multiplies the proportional adjustment coefficient kpt by the rising proportional control factor coefficient sbk to obtain the rising proportional control coefficient skpz, that is, skpz=kpt*sbk*kpz.

[0197] S1742: In response to the current error value decreasing, multiply the proportional adjustment coefficient by the decreasing proportional control factor coefficient to obtain the decreasing proportional control coefficient.

[0198] When it is determined that the current error value Ier is reduced, the proportional adjustment coefficient kpt is multiplied by the decreasing proportional control factor coefficient jbk to obtain the decreasing proportional control coefficient jkpz, that is, kpz=kpt*jbk.

[0199] When the currently acquired current error value Ier is the same, the decreasing proportional control factor coefficient jbk is different from the increasing proportional control factor coefficient sbk.

[0200] Please continue reading Figure 14 , Figure 14 yes Figure 12 In one embodiment, the power control method of the present application includes, in addition to the above steps S171-S176, further including some more specific steps. Specifically, the above step S175 may further include the following steps:

[0201] S1751: In response to the current error value increasing, multiply the integral adjustment coefficient by the rising integral control factor coefficient to obtain the rising integral control coefficient.

[0202] The integral control factor coefficient jk0 also includes an increasing integral control factor coefficient sjk and a decreasing integral control factor coefficient jjk, and the integral control coefficient kiz includes an increasing integral control coefficient skiz and a decreasing integral control coefficient jkiz.

[0203] Similarly, when it is determined that the current error value Ier increases, the integral adjustment coefficient kit is multiplied by the rising integral control factor coefficient sjk to obtain the rising integral control coefficient skiz, that is, kiz=kit*sjk.

[0204] S1752: In response to the current error value decreasing, multiply the integral adjustment coefficient by the decreasing integral control factor coefficient to obtain a decreasing integral control coefficient.

[0205] When it is determined that the current error value Ier is reduced, the integral adjustment coefficient kit is multiplied by the decreasing integral control factor coefficient jjk to obtain the decreasing integral control coefficient jkiz, that is, kiz=kit*jjk.

[0206] When the currently acquired current error value Ier is the same, the decreasing integral control factor coefficient jjk is different from the increasing integral control factor coefficient sjk.

[0207] In some embodiments, the rising proportional control factor coefficient sbk and the rising integral control factor coefficient sjk can be the same or different; and the rising proportional control factor coefficient sbk and the rising integral control factor coefficient sjk can be different in response to different current error values ​​Ier, or they can be the same, and are obtained by fitting and setting based on simulation prediction or experimental optimization. This application does not limit this.

[0208] In some embodiments, the decreasing proportional control factor coefficient jbk and the decreasing integral control factor coefficient jjk can be the same or different; and the decreasing proportional control factor coefficient jbk and the decreasing integral control factor coefficient jjk can be different in response to different current error values ​​Ier, or can be the same, and are obtained by fitting and setting based on simulation prediction or experimental optimization. This application does not limit this.

[0209] This application also provides an electronic device, see Figure 15 , Figure 15 FIG. 2 is a schematic diagram of the structure of an embodiment of an electronic device of the present application. In this embodiment, the electronic device 60 includes a housing 61 and a third power control circuit 62 connected to the housing 61 .

[0210] It should be noted that the third power control circuit 62 described in this embodiment is the first power control circuit 20 or the second power control circuit 40 described in any one of the above embodiments. Figures 1-14 And the related text content will not be repeated here.

[0211] The beneficial effects of the present application are as follows: Different from the prior art, the power supply control method provided by the present application obtains the instantaneous value of the on-current in the voltage conversion circuit, integrates the instantaneous value of the on-current to obtain a charge integral, obtains a pulse reference signal, a preset proportional coefficient, and a preset integral coefficient to convert the pulse reference signal into a target charge, subtracts the charge integral from the target charge to obtain a charge error value, and when the level amplitude of the pulse reference signal changes, adjusts the preset proportional coefficient and the preset integral coefficient respectively to obtain a proportional adjustment coefficient and an integral adjustment coefficient, and uses the proportional adjustment coefficient and the integral adjustment coefficient to perform proportional-integral adjustment on the charge error value to obtain a drive control signal, thereby being able to respond to changes in the level amplitude of the pulse reference signal, that is, when the load state changes, by adjusting the preset proportional coefficient and the preset integral coefficient, so that the drive control signal obtained thereby can more quickly adjust the output current of the voltage conversion circuit to the current amplitude range required by the changed load state, thereby effectively reducing the rise time and fall time of the output current, thereby achieving fast response within the full load range; and there is no need to operate the corresponding power device in the linear region, thereby reducing power loss, improving reliability, and eliminating the need to limit output power.

[0212] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power supply control method, applied to power supply control of a voltage conversion circuit, characterized in that: The power control method comprises: Obtaining an instantaneous value of an on-state current in the voltage conversion circuit; Integrating the instantaneous value of the on-state current to obtain an integral charge; Obtaining a pulse reference signal, a preset proportional coefficient, and a preset integral coefficient; converting the pulse reference signal into a target charge amount; Subtracting the charge integral from the target charge to obtain a charge error value; In response to the level amplitude change of the pulse reference signal, the preset proportional coefficient and the preset integral coefficient are respectively adjusted to obtain the proportional adjustment coefficient and the integral adjustment coefficient; wherein, the step of adjusting the preset proportional coefficient and the preset integral coefficient to obtain the proportional adjustment coefficient and the integral adjustment coefficient in response to the level amplitude change of the pulse reference signal comprises: obtaining a level change error value of the pulse reference signal; detecting whether the level change error value is within a preset error threshold range; if the level change error value is greater than the preset error threshold range; multiplying the preset proportional coefficient by a second proportional increase factor to obtain the proportional adjustment coefficient; and multiplying the preset integral coefficient by the second integral increase factor to obtain the integral adjustment coefficient; Performing proportional-integral regulation on the charge error value using the proportional regulation coefficient and the integral regulation coefficient to obtain a drive control signal; The driving control signal is sent to the voltage conversion circuit to trigger the voltage conversion circuit to change the switch state, thereby adjusting the output current of the voltage conversion circuit.

2. The power control method according to claim 1, wherein: The step of adjusting the preset proportional coefficient and the preset integral coefficient respectively to obtain the proportional adjustment coefficient and the integral adjustment coefficient in response to the level amplitude change of the pulse reference signal includes: Obtaining a rising edge of the pulse reference signal; In response to the rising edge, multiplying the preset proportional coefficient by a first proportional increase factor to obtain the proportional adjustment coefficient; The preset integral coefficient is multiplied by a first integral increase factor to obtain the integral adjustment coefficient.

3. The power control method according to claim 1, wherein: The step of adjusting the preset proportional coefficient and the preset integral coefficient in response to the level amplitude change of the pulse reference signal to obtain the proportional adjustment coefficient and the integral adjustment coefficient includes: Obtaining a falling edge of the pulse reference signal; In response to the falling edge, multiplying the preset proportional coefficient by a first proportional reduction factor to obtain the proportional adjustment coefficient; The preset integral coefficient is multiplied by a first integral reduction factor to obtain the integral adjustment coefficient.

4. The power control method according to claim 1, wherein: The step of multiplying the preset proportional coefficient by the second proportional increase factor to obtain the proportional adjustment coefficient includes: Obtaining a proportional increase correction factor using the level change error value; wherein the proportional increase correction factor is positively correlated with the level change error value; The preset proportional coefficient is multiplied by the second proportional increase factor, and then multiplied by the proportional increase correction factor to obtain the proportional adjustment coefficient.

5. The power control method according to claim 4, wherein: The step of obtaining a proportional increase correction factor by using the level change error value comprises: The level change error value is processed by a calculation using a preset correction function or a preset mapping relationship table to obtain the proportional increase correction factor.

6. The power control method according to claim 4, wherein: The step of multiplying the preset integral coefficient by the second integral rising factor to obtain the integral adjustment coefficient includes: Obtaining an integral rise correction factor using the level change error value; wherein the integral rise correction factor is positively correlated with the level change error value; The preset integral coefficient is multiplied by the second integral increase factor, and then multiplied by the integral increase correction factor to obtain the integral adjustment coefficient.

7. The power control method according to claim 1, wherein: The power control method further includes: If the level change error value is less than the preset error threshold range; Multiplying the preset proportional coefficient by a second proportional reduction factor to obtain the proportional adjustment coefficient; The preset integral coefficient is multiplied by a second integral reduction factor to obtain the integral adjustment coefficient.

8. The power control method according to claim 7, wherein: The step of multiplying the preset proportional coefficient by the second proportional reduction factor to obtain the proportional adjustment coefficient includes: Obtaining a proportional reduction correction factor using the level change error value; wherein the proportional reduction correction factor is positively correlated with the level change error value; The preset proportional coefficient is multiplied by the second proportional reduction factor, and then multiplied by the proportional reduction correction factor to obtain the proportional adjustment coefficient.

9. The power control method according to claim 8, wherein: The step of multiplying the preset integral coefficient by the second integral reduction factor to obtain the integral adjustment coefficient includes: Obtaining an integral decrease correction factor using the level change error value; wherein the integral decrease correction factor is positively correlated with the level change error value; The preset integral coefficient is multiplied by the second integral reduction factor, and then multiplied by the integral reduction correction factor to obtain the integral adjustment coefficient.

10. The power supply control method according to any one of claims 1 to 9, characterized in that: The step of performing proportional-integral regulation on the charge error value using the proportional regulation coefficient and the integral regulation coefficient to obtain a drive control signal comprises: obtaining the output current; Subtracting the output current from the pulse reference signal to obtain a current error value; Obtaining a proportional control factor coefficient and an integral control factor coefficient using the current error value; wherein the proportional control factor coefficient and the integral control factor coefficient are both positively correlated with the current error value; Multiplying the proportional adjustment coefficient by the proportional control factor coefficient to obtain a proportional control coefficient; Multiplying the integral adjustment coefficient by the integral control factor coefficient to obtain an integral control coefficient; The drive control signal is obtained by performing proportional-integral adjustment on the charge error value using the proportional control coefficient and the integral control coefficient.

11. The power control method according to claim 10, wherein: The proportional control factor coefficient includes an increasing proportional control factor coefficient and a decreasing proportional control factor coefficient, and the proportional control coefficient includes an increasing proportional control coefficient and a decreasing proportional control coefficient. The step of multiplying the proportional adjustment coefficient by the proportional control factor coefficient to obtain the proportional control coefficient includes: In response to an increase in the current error value, multiplying the proportional adjustment coefficient by the rising proportional control factor coefficient to obtain the rising proportional control coefficient; In response to the current error value decreasing, the proportional adjustment coefficient is multiplied by the decreasing proportional control factor coefficient to obtain the decreasing proportional control coefficient.

12. The power control method according to claim 10, wherein: The integral control factor coefficient includes an increasing integral control factor coefficient and a decreasing integral control factor coefficient, and the integral control coefficient includes an increasing integral control coefficient and a decreasing integral control coefficient. The step of multiplying the integral adjustment coefficient by the integral control factor coefficient to obtain the integral control coefficient includes: In response to an increase in the current error value, multiplying the integral adjustment coefficient by the rising integral control factor coefficient to obtain the rising integral control coefficient; In response to the current error value decreasing, the integral adjustment coefficient is multiplied by the decreasing integral control factor coefficient to obtain the decreasing integral control coefficient.

13. A power supply control circuit, characterized in that: The power control circuit is coupled to the voltage conversion circuit; The power control circuit controls the power supply of the voltage conversion circuit using the power control method according to any one of claims 1 to 12.

14. An electronic device, characterized in that: The electronic device includes a housing and a power control circuit connected to the housing; Wherein, the power control circuit is the power control circuit as claimed in claim 13.

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