Charge adjusting method, charge adjusting circuit and electronic equipment

Abstract

The invention discloses a charge adjusting method, a charge adjusting circuit and electronic equipment. The charge adjusting method comprises the following steps: acquiring an input voltage of a voltage conversion circuit; detecting whether the input voltage is within a first threshold range; if the input voltage is within the first threshold range, a preset control signal is sent to the voltage conversion circuit; obtaining the output voltage and / or output current of the voltage conversion circuit; detecting whether the output voltage or the output current is within a second threshold range; if the output voltage or the output current is within a second threshold range, generating a driving control signal by using the output current; and the driving control signal is sent to the voltage conversion circuit to trigger the voltage conversion circuit to change the switching state so as to adjust the output current. Through the above mode, the charge regulation method effectively optimizes the waveform of the output current and reduces the rise time of the output current on the premise of avoiding triggering over-current protection, so as to ensure the quality and stability of power supply.

Description

Technical Field

[0001] This application relates to the technical field of circuit control, and particularly to a charge regulation method, a charge regulation circuit, and an electronic device. Background Art

[0002] Nowadays, with the increasing richness of electronic devices, the performance requirements for the driving power supply of electronic devices are becoming increasingly stringent. Especially when using the PI (Proportional Integral) control strategy to control the voltage conversion circuit for power supply, before the arrival of the first current pulse of the reference output current, the output current of the voltage conversion circuit is 0, and the output threshold voltage has not been established. Therefore, compared with the stable reference output current, there is a process of establishing the output threshold voltage for the first wave of the drive control signal. For the voltage conversion circuit, the output voltage is relatively small at this time. If the PI parameters of the closed-loop control are too large, the duty cycle of the drive control signal is relatively large, and it is easy to trigger overcurrent protection; if the PI parameters of the closed-loop control are too small, the speed of increase in the duty cycle of the drive control signal is relatively slow, which will result in a relatively slow current rise time, thus affecting the power supply quality and stability. Summary of the Invention

[0003] The main technical problem to be solved by this application is to provide a charge regulation method, a charge regulation circuit, and an electronic device, which can solve the problem that the control method of the voltage conversion circuit in the related art cannot avoid a slow current rise time and affect the power supply quality and stability under the premise of avoiding triggering overcurrent protection.

[0004] To solve the above technical problem, a technical solution adopted by this application is: to provide a charge regulation method, which is applied to the charge regulation of a voltage conversion circuit. Among them, the charge regulation method includes: obtaining the input voltage of the voltage conversion circuit; detecting whether the input voltage is within a first threshold range; if the input voltage is within the first threshold range, sending a preset control signal to the voltage conversion circuit; obtaining the output voltage and / or output current of the voltage conversion circuit; detecting whether the output voltage or output current is within a second threshold range; if the output voltage or output current is within the second threshold range, generating a drive control signal using the output current; and sending the drive control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change the switch state, thereby regulating the output current.

[0005] Among them, before the step of sending the preset control signal to the voltage conversion circuit, it further includes: generating the preset control signal with a preset duty cycle.

[0006] Among them, before the step of sending the preset control signal to the voltage conversion circuit, it further includes: generating the preset control signal using the difference between the lower limit value of the second threshold range and the output voltage.

[0007] Among them, generating a drive control signal using the output current includes: generating a drive control signal using the difference between the zero current and the output current; detecting the rising edge of a given pulsed current; and in response to the rising edge of the given pulsed current, adjusting the difference between the given pulsed current and the output current to obtain a drive control signal.

[0008] Among them, the step of adjusting the drive control signal using the difference between the given pulsed current and the output current includes: obtaining a target current integral value using the difference between the given pulsed current and the output current; obtaining the input current of the voltage conversion circuit; performing integral adjustment on the input current to obtain an integral reference value; and comparing the target current integral value with the integral reference value to obtain a drive control signal.

[0009] Among them, after the step of obtaining the input voltage of the voltage conversion circuit and before the step of detecting whether the input voltage is within the first threshold range, it further includes: detecting the rising edge of the given pulsed current; and in response to the rising edge of the given pulsed current, performing the step of detecting whether the input voltage is within the first threshold range.

[0010] Among them, the charge regulation method further includes: if the input voltage is not within the first threshold range, returning to perform the step of detecting the rising edge of the given pulsed current.

[0011] Among them, the charge regulation method further includes: if the input voltage is within the first threshold range, detecting the rising edge of the given pulsed current; and in response to the rising edge of the given pulsed current, sending a preset control signal to the voltage conversion circuit.

[0012] To solve the above technical problems, another technical solution adopted by this application is: providing a charge regulation circuit, among which, the charge regulation circuit is coupled to the voltage conversion circuit; and the charge regulation circuit uses the charge regulation method described in any one of the above to perform charge regulation on the voltage conversion circuit.

[0013] To solve the above technical problems, yet another technical solution adopted by this application is: providing an electronic device, among which, the electronic device includes a housing and a charge regulation circuit connected to the housing; and the charge regulation circuit is the charge regulation circuit described above.

[0014] The beneficial effects of the present application are as follows: Different from the prior art, the charge regulation method provided by the present application obtains the input voltage of the voltage conversion circuit to detect whether the input voltage is within the first threshold range. When the input voltage is within the first threshold range, a preset control signal is first sent to the voltage conversion circuit. When it is detected that the output voltage or output current is within the second threshold range, a drive control signal is generated using the output current and sent to the voltage conversion circuit to trigger the voltage conversion circuit to change the switching state. Thus, in the input voltage boosting stage, that is, at the initial stage of power supply, the voltage conversion circuit can be controlled in a way of first open-loop and then closed-loop, or first using the first closed-loop feedback control with a limited duty cycle and then using the second closed-loop feedback control with dynamic regulation, so as to establish an output threshold voltage before the voltage or current closed-loop access control, effectively optimize the output current waveform, reduce the output current rise time, effectively ensure the power supply quality and stability, and also have good dynamic response performance on the premise of avoiding triggering overcurrent protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, where: Figure 1 is a schematic flowchart of the first implementation manner of the charge regulation method of the present application; Figure 2 is a schematic structural diagram of the first implementation manner of the charge regulation circuit of the present application; Figure 3 is Figure 1 a schematic flowchart of an embodiment of S16 in Figure 4 is Figure 3 a schematic flowchart of an embodiment of S163 in Figure 5 is a schematic structural diagram of the second implementation manner of the charge regulation circuit of the present application; Figure 6 is Figure 4 a logic framework diagram of signal processing in the charge regulation method in Figure 7 is Figure 7 a waveform schematic diagram of each related signal in the charge regulation method in Figure 8 is a schematic flowchart of the second implementation manner of the charge regulation method of the present application; Figure 9 is Figure 8 a waveform schematic diagram of each related signal in the charge regulation method in Figure 10 is a schematic flowchart of the third implementation manner of the charge adjustment method of this application; Figure 11 is a schematic structural diagram of an implementation manner of an electronic device of this application. Specific implementation manners

[0016] Next, the technical solutions in the implementation manners of this application will be clearly and completely described in conjunction with the accompanying drawings in the implementation manners of this application. Obviously, the described implementation manners are only a part of the implementation manners of this application, rather than all of the implementation manners. Based on the implementation manners in this application, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by this application.

[0017] The terms "first", "second", and "third" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. All directional indications (such as up, down, left, right, front, back...) in the implementation manners of this application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, then the directional indications will also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0018] Referring to "implementation manner" herein means that the specific features, structures, or characteristics described in connection with the implementation manner may be included in at least one implementation manner of this application. The phrase appears in various places in the specification and does not necessarily refer to the same implementation manner, nor is it an independent or alternative implementation manner that is mutually exclusive with other implementation manners. Those skilled in the art will explicitly and implicitly understand that the implementation manners described herein can be combined with other implementation manners.

[0019] Next, this application will be described in detail in conjunction with the accompanying drawings and implementation manners.

[0020] Please refer to Figure 1 and Figure 2 , where Figure 1It is a schematic flowchart of the first embodiment of the charge regulation method of this application. Figure 2 It is a schematic structural diagram of the first embodiment of the charge regulation circuit of this application. Specifically, it may include the following steps: S11: Obtain the input voltage of the voltage conversion circuit.

[0021] It can be understood that the charge regulation method in this embodiment is specifically applied to the charge regulation of the first voltage conversion circuit 30 as shown in Figure 2 Figure. Among them, the first charge regulation circuit 20 uses the charge regulation method described in any item herein to achieve charge regulation of the first voltage conversion circuit 30.

[0022] It should be noted that the first voltage conversion circuit 30 may specifically be a single-phase BUCK circuit (step-down conversion circuit), a multi-phase BUCK circuit, or a BOOST circuit (step-up conversion circuit), or any other reasonable form of circuit topology, and this embodiment does not limit this.

[0023] In some embodiments, the first charge regulation 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, discrete gates, or transistor logic devices, discrete hardware, or any other reasonable circuit unit with signal processing functions. This application does not limit this.

[0024] In addition, "coupled" in this article refers to including any direct and indirect connection means. Therefore, if it is described in the text that the first circuit is coupled to the second circuit, it means that the first circuit can be directly connected to the second circuit through electrical connection, wireless transmission, optical transmission, or other signal connection methods, or indirectly electrically connected or signal connected to the second circuit through other circuits or connection means.

[0025] Specifically, the first charge regulation circuit 20 monitors the input voltage of the first voltage conversion circuit 30 in real time, that is, the input voltage provided by the external power supply to the first voltage conversion circuit 30.

[0026] Among them, the input voltage can be specifically obtained through any reasonable sampling method such as a voltage sensor, a sampling resistor, or circuit model estimation. This application does not limit this.

[0027] S12: Detect whether the input voltage is within the first threshold range.

[0028] It is understandable that the specific corresponding range of the first threshold is the threshold voltage range for determining that the input voltage of the first voltage conversion circuit 30 has been established. When it is detected that the input voltage is within the first threshold range, it can be determined that the input voltage has been applied and the pre-charging state is entered.

[0029] Among them, if the input voltage is within the first threshold range, S13 is executed; if the input voltage is not within the first threshold range, S11 is returned for execution.

[0030] S13: Send a preset control signal to the voltage conversion circuit.

[0031] It is understandable that during the input voltage boosting stage, that is, at the initial stage of power supply, since the output voltage of the first voltage conversion circuit 30 is small, the rising slope of the inductor current is relatively large. If the PI parameters of the voltage or current closed-loop control are too large, that is, the duty cycle of the control signal is relatively large, it is easy to trigger the over-current protection of the inductor current. Therefore, it is necessary to limit the duty cycle of this control signal.

[0032] Specifically, the first charge regulation circuit 20 presets a control signal with a suitable duty cycle according to the actual power supply demand, that is, the preset control signal, and sends the preset control signal to the first voltage conversion circuit 30 to trigger it to change the switching state, thereby regulating the output voltage and output current of the first voltage conversion circuit 30.

[0033] In some embodiments, the drive control signal can 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, etc. The present application does not make any limitations in this regard.

[0034] In some embodiments, the duty cycle of the preset control signal can specifically be a constant value and less than the set threshold; or, the duty cycle changes as a preset function with time as the independent variable and is limited to less than the set threshold; or, the duty cycle is determined by a closed-loop control implemented according to the output voltage and / or output current and is limited to less than the set threshold, or a duty cycle that changes dynamically determined by a voltage closed-loop control defined by a reference voltage. To distinguish it from the subsequent closed-loop control, it can be defined as the first closed-loop feedback control. The present application does not make any limitations in this regard.

[0035] It is worth noting that the set threshold is specifically reasonably set at the initial stage of input voltage establishment to avoid triggering the over-current protection of the inductor current. The present application does not make any limitations in this regard.

[0036] S14: Obtain the output voltage and / or output current of the voltage conversion circuit.

[0037] Sample and obtain the output voltage and / or output current from the first voltage conversion circuit 30.

[0038] S15: Detect whether the output voltage or output current is within the second threshold range.

[0039] Detect whether the currently obtained output voltage is within the second threshold range, or detect whether the output current is within the second threshold range.

[0040] It should be noted that the second threshold range can specifically be a voltage threshold range or a current threshold range; and the lower limit value of the voltage threshold range can specifically be set according to the threshold voltage corresponding to the rated output voltage when maintaining the normal operation of the load, and is less than the threshold voltage, and can specifically be 50%-85% of the threshold voltage; the lower limit value of the current threshold range can specifically be set according to the threshold current corresponding to the rated output current when maintaining the normal operation of the load, and is less than the threshold current, and can specifically be 50%-85% of the threshold current. This application does not make any limitations in this regard.

[0041] Among them, if the output voltage is within the second threshold range, or the output current is within the second threshold range, then execute S16. If the output voltage is not within the second threshold range, or the output current is not within the second threshold range, then return to execute S13.

[0042] S16: Generate a drive control signal using the output current.

[0043] When it is determined that the output voltage is within the second threshold range, or the output current is within the second threshold range, a PI controller, or any other reasonable feedback control algorithm such as a PID (Proportional Integral Derivative) controller can be used to process the currently obtained output current to obtain a drive control signal, and dynamically adjust the duty cycle of the drive control signal. To distinguish it from the foregoing closed-loop control, it can be defined as the second closed-loop feedback control. This application does not make any limitations in this regard.

[0044] S17: Send 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.

[0045] Send the drive control signal that is under dynamic adjustment to the first voltage conversion circuit 30 to trigger the first voltage conversion circuit 30 to change the switch state in real time, thereby dynamically adjusting the output current.

[0046] It is understandable that the first charge regulation circuit 20 can specifically divide two control stages according to the output voltage or output current after the input voltage is established. In the first stage, that is, in the pre-charging stage where the input voltage is within the first threshold range but the output voltage or output current is lower than the second threshold range, an open-loop or first closed-loop feedback control is implemented using a preset control signal with a limited duty cycle. In the second stage, that is, in the current closed-loop control stage where the output voltage or output current is within the second threshold range, a drive control signal is used to implement the second closed-loop feedback control, so as to control the first voltage conversion circuit 30 in the way of first open-loop then closed-loop during the input voltage boosting stage, that is, at the initial stage of power supply, or first using the first closed-loop feedback control with a limited duty ratio and then using the second closed-loop feedback control with dynamic regulation, so as to establish the output threshold voltage before the voltage or current closed-loop access control on the premise of avoiding triggering over-current protection, effectively optimize the output current waveform, reduce the output current rise time, thus effectively ensuring the power supply quality and stability, and also having better dynamic response performance.

[0047] Further, in an embodiment, S13 may specifically include: generating a preset control signal using a preset duty ratio.

[0048] It is understandable that the preset duty ratio can be a constant value, or can be less than a set threshold and change according to a preset function with time as the independent variable, and the present application does not make any limitation thereto.

[0049] Further, in an embodiment, S13 may specifically further include: generating a preset control signal using the difference between the lower limit value of the second threshold range and the output voltage.

[0050] It is understandable that the preset control signal can specifically also perform voltage feedback regulation according to the difference between the lower limit value of the second threshold range and the output voltage, so as to avoid triggering over-current protection due to an excessive duty ratio by limiting the reference voltage.

[0051] Please continue to refer to Figure 3 , Figure 3 is Figure 1 a schematic flowchart of an embodiment of S16. In an embodiment, the charge regulation method of the present application further includes some more specific steps in addition to the above S11 - S17. Specifically, S16 may specifically further include the following steps: S161: Generating a drive control signal using the difference between the zero current and the output current.

[0052] It should be noted that when it is determined that the output voltage or output current is within the second threshold range, that is, entering the current closed-loop feedback control, and at this time, before the first wave of the reference current as the control target, that is, the given pulse current, arrives, it can be understood that the given pulse current is 0.

[0053] Specifically, before the first wave of the given pulse current is obtained, the first charge regulation circuit 20 subtracts the current output currently obtained from zero current to obtain a current difference, and performs proportional-integral regulation on the current difference to obtain a drive control signal.

[0054] S162: Detect the rising edge of the given pulse current.

[0055] It can be understood that the given pulse current has a transition from a low level to a high level, i.e., a rising edge, and a transition from a high level to a low level, i.e., a falling edge; among them, when the first charge regulation circuit 20 obtains the first rising edge, it is determined that the first wave of the given pulse current has arrived.

[0056] Specifically, the first charge regulation circuit 20 identifies and detects the rising edge of the given pulse current. For example, this can be achieved by any reasonable means such as a hardware circuit (such as an edge trigger), a software algorithm (for example, writing corresponding code in an embedded system), or a controller counter, and the present application does not limit this.

[0057] S163: In response to the rising edge of the given pulse current, adjust the obtained drive control signal by using the difference between the given pulse current and the output current.

[0058] When the rising edge of the given pulse current is obtained, the current difference can be obtained by subtracting the output current from the current given pulse current, and proportional-integral regulation is performed on the current difference to output a reference signal for modulating the duty cycle, that is, the drive control signal.

[0059] It can be understood that before the first wave of the given pulse current arrives, due to the existence of a pre-charging stage, the output voltage or output current is in the second threshold range, that is, the output threshold voltage has been established. Therefore, the rising time of the output current when the first given pulse current of the first voltage conversion circuit 30 arrives can be effectively increased, and this rising time is consistent with the rising process of subsequent given pulse currents after they appear stably, that is, non-first current pulses, and can effectively achieve the purpose of optimizing the waveform and reducing the rising time, and optimize the consistency of the output current.

[0060] Please continue to refer to Figure 4 , Figure 4 is Figure 3 The schematic flowchart of an embodiment of S163 in. In an embodiment, the charge regulation method of the present application further includes some more specific steps in addition to the above S161 - S163. Specifically, the above S163 may further include the following steps: S1631: Obtain a target current integral value by using the difference between the given pulse current and the output current.

[0061] Please continue to refer to Figure 5, Figure 5 It is a schematic structural diagram of the second embodiment of the charge regulation circuit of the present application.

[0062] It can be understood that the charge regulation method in this embodiment can specifically be that a second charge regulation circuit (not shown in the figure) realizes charge regulation for the second voltage conversion circuit 40 as shown in Figure 5 to supply power to the load circuit 101. Among them, the second voltage conversion circuit 40 includes a switching sub-circuit 41 and a regulated output sub-circuit 42. The switching sub-circuit 41 includes a first switching transistor Q1, a second switching transistor Q2, and a third switching transistor Q3. The regulated output sub-circuit 42 includes a first diode D1, a second diode D2, a third diode D3, a first inductor L1, a second inductor L2, a third inductor L3, and an output capacitor C1. The load circuit 101 includes an equivalent diode DF and an equivalent resistor R1.

[0063] Among them, the first end of the first switching transistor Q1 is coupled to the first end of the second switching transistor Q2 and the first end of the third switching transistor Q3, and is used to be coupled to the first end of the DC power supply DC. The second end of the first switching transistor Q1 is coupled to the first end of the first inductor L1 and the second end of the first diode D1. The second end of the second switching transistor Q2 is coupled to the first end of the second inductor L2 and the second end of the second diode D2. The second end of the third switching transistor Q3 is coupled to the first end of the third inductor L3 and the second end of the third diode D3. The second end of the first inductor L1 is coupled to the second end of the second inductor L2, the second end of the third inductor L3, and the first end of the output capacitor C1, and is used to be coupled to the first end of the equivalent diode DF. The first end of the first diode D1 is coupled to the first end of the second diode D2, the first end of the third diode D3, and the second end of the output capacitor C1, and is used to be coupled to the second end of the DC power supply DC and the second end of the equivalent resistor R1. The second end of the equivalent diode DF is coupled to the first end of the equivalent resistor R1. The third ends of the first switching transistor Q1, the second switching transistor Q2, and the third switching transistor Q3 are all coupled to the second charge regulation circuit.

[0064] In some embodiments, the first switching transistor Q1, the second switching transistor Q2, and the third switching transistor Q3 can specifically be one of MOSFET (Metal Oxide Semiconductor Field Effect Transistor), triode, thin film transistor, or field effect transistor, or any other reasonable switching transistor. The present application does not limit this.

[0065] In other embodiments, the second voltage conversion circuit 40 may specifically be a single-phase BUCK circuit, a BOOST circuit, or a multi-phase BUCK circuit with any other reasonable number of phases; and the load circuit 101 may specifically further include one or more of any reasonable circuit elements such as an equivalent series resistance, an equivalent capacitance, an equivalent series diode, etc., and this embodiment does not limit this.

[0066] Please continue to refer to Figure 6 and Figure 7 , where Figure 6 is Figure 4 a logic framework diagram of signal processing in the charge regulation method in Figure 7 is Figure 4 a waveform schematic diagram of each relevant signal in the charge regulation method in

[0067] For easy understanding, taking the second voltage conversion circuit 40 as the above-mentioned three-phase BUCK circuit as an example, when the second charge regulation circuit detects that the input voltage has been established, that is, when the input voltage is within the first threshold range, it enters the pre-charge stage to make the control signal G a preset control signal, that is, the control signal G includes the first control signal G1, the first control signal G2, and the first control signal G3 with phase staggering, and the duty cycle is constant or the duty cycle is limited, so as to be able to trigger the first switch tube Q1, the second switch tube Q2, and the third switch tube Q3 to conduct or turn off respectively by using the first control signal G1, the first control signal G2, and the first control signal G3, thereby regulating the output voltage or the output current Io.

[0068] When detecting whether the output voltage or the output current Io is within the second threshold range, it enters the current closed-loop control stage to make the control signal G a drive control signal, that is, subtracting the output current Io from the given pulse current Iref to obtain a current difference, and performing proportional-integral regulation on the current difference to obtain a target current integral value.

[0069] S1632: Obtain the input current of the voltage conversion circuit.

[0070] Further, sample and obtain the first input current Iin1, the second input current Iin2, and the third input current Iin3 from the first switch tube Q1, the second switch tube Q2, and the third switch tube Q3 respectively.

[0071] S1633: Perform integral regulation on the input current to obtain an integral reference value.

[0072] Use the first input current Iin1, the second input current Iin2, and the third input current Iin3 to charge the corresponding integral capacitors respectively to perform integral regulation to obtain the first integral reference value, the second integral reference value, and the third integral reference value.

[0073] S1634: Compare the target current integral value with the integral reference value to obtain a drive control signal.

[0074] Compare the target current integral value with a first integral reference value, a second integral reference value, and a third integral reference value respectively to obtain a first control signal G1, a first control signal G2, and a first control signal G3. For example, determine the turn-off moment of the first control signal G1, i.e., the falling edge, when the target current integral value is equal to the first integral reference value, and determine the rising edge of the first control signal G1 according to the set switching period, and respectively obtain the first control signal G2 and the first control signal G3 according to this signal processing logic.

[0075] It should be noted that before the rising edge of the given pulse current Iref arrives, specifically, set the given pulse current Iref to 0, and respectively generate the first control signal G1, the first control signal G2, and the first control signal G3 according to the above signal processing logic, and when detecting the rising edge of the given pulse current Iref, use the given pulse current Iref to respectively generate and dynamically adjust the first control signal G1, the first control signal G2, and the first control signal G3.

[0076] In addition, when the number of switching tubes in the switching sub-circuit 41 is any reasonable number such as 1, 2, or 4, the number of the control signal G and the corresponding signals also corresponds to any reasonable number such as 1, 2, or 4, which will not be elaborated here.

[0077] As can be seen from the above, by restricting the duty cycle of the control signal G in the pre-charging stage, it is possible to effectively avoid the overcurrent protection of the inductance current triggered by the relatively large rising slope of the first inductance current I L1 , the second inductance current I L2 and the third inductance current I L3 during the process of establishing the threshold voltage before the arrival of the first wave of the given pulse current Iref due to the relatively small output voltage, and an output threshold voltage has been established before the arrival of the given pulse current Iref, which can also effectively improve the rising time of the output current Io when the first given pulse current Iref arrives, and this rising time is consistent with the rising process of the subsequent given pulse current Iref after it appears stably, i.e., the non-first current pulse, which can effectively achieve the purpose of optimizing the waveform and reducing the rising time, and optimize the consistency of the output current Io.

[0078] Please refer to Figure 8 , Figure 8 which is a schematic flow chart of the second implementation manner of the charge regulation method of this application. The charge regulation method of this implementation manner is Figure 1 a schematic flow chart of a refined implementation manner of the charge regulation method in S51: Obtain the input voltage of the voltage conversion circuit.

[0079] Among them, S51 is the same as Figure 1 S11 in, for specific details, please refer to S11 and its related textual descriptions, which will not be elaborated here.

[0080] S52: Detect the rising edge of the given pulse current.

[0081] Please continue to refer to Figure 9 , Figure 9 which Figure 8 is a waveform schematic diagram of an embodiment of each related signal of the charge regulation method in

[0082] It can be understood that the difference between the charge regulation method of this embodiment and the Figure 1 charge regulation method in is that there is no current closed-loop feedback control waiting state, but instead, when the rising edge of the given pulse current arrives, the output threshold voltage starts to be established, that is, the rising edge of the given pulse current is used as the starting trigger condition for initiating charge regulation in the pre-charge stage.

[0083] Specifically, when the input voltage is obtained, the rising edge of the given pulse current is identified and detected.

[0084] In other embodiments, specifically, the input voltage can also be obtained after the rising edge of the given pulse current is detected.

[0085] S53: In response to the rising edge of the given pulse current, detect whether the input voltage is within the first threshold range.

[0086] When the rising edge of the given pulse current is detected, that is, when the first wave is determined to arrive, detect whether the currently obtained input voltage is within the first threshold range and start pre-charging.

[0087] S54: Send a preset control signal to the voltage conversion circuit.

[0088] S55: Obtain the output voltage and / or output current of the voltage conversion circuit.

[0089] S56: Detect whether the output voltage or output current is within the second threshold range.

[0090] S57: Generate a drive control signal using the output current.

[0091] S58: Send the drive control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change the switch state, thereby regulating the output current.

[0092] Among them, S54, S55, S56, S57, and S58 are the same as Figure 1S13, S14, S15, S16, and S17 in [reference] are the same. For details, please refer to S13, S14, S15, S16, S17 and their relevant textual descriptions, which will not be elaborated here.

[0093] Please refer to Figure 10 , Figure 10 is a schematic flowchart of the third implementation manner of the charge regulation method of this application. The charge regulation method of this implementation manner is Figure 1 a schematic flowchart of a refined implementation manner of the charge regulation method in [reference], specifically including the following steps: S61: Obtain the input voltage of the voltage conversion circuit.

[0094] Among them, S61 is the same as Figure 1 S11 in [reference]. For details, please refer to S11 and its relevant textual descriptions, which will not be elaborated here.

[0095] S62: Detect whether the input voltage is within the first threshold range.

[0096] Detect whether the currently obtained input voltage is within the first threshold range.

[0097] Among them, if the input voltage is within the first threshold range, execute S63; if the input voltage is not within the first threshold range, return to execute S61.

[0098] S63: Detect the rising edge of the given pulse current.

[0099] It can be understood that the difference between the charge regulation method of this implementation manner and Figure 1 the charge regulation method in [reference] is that there is also no current closed-loop feedback control waiting state. Instead, when it is determined that the input voltage has been established and the rising edge of the given pulse current arrives, the output threshold voltage begins to be established, that is, the rising edge of the given pulse current is used as the starting trigger condition for pre-charging to initiate charge regulation.

[0100] Specifically, when it is determined that the input voltage is within the first threshold range, the rising edge of the given pulse current is identified and detected.

[0101] S64: In response to the rising edge of the given pulse current, send a preset control signal to the voltage conversion circuit.

[0102] When the rising edge of the given pulse current is detected, that is, when it is determined that the first wave arrives, enter the pre-charging stage, and send a preset control signal to the first voltage conversion circuit 30 to trigger it to change the switch state, thereby regulating the output voltage and output current of the first voltage conversion circuit 30.

[0103] S65: Obtain the output voltage and / or output current of the voltage conversion circuit.

[0104] S66: Detect whether the output voltage or output current is within a second threshold range.

[0105] S67: Generate a drive control signal using the output current.

[0106] S68: Send the drive control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change its switching state, thereby regulating the output current.

[0107] Among them, S65, S66, S67, and S68 are the same as Figure 1 S14, S15, S16, and S17 in. For specific details, please refer to S14, S15, S16, and S17 and their related textual descriptions, which will not be elaborated here.

[0108] This application also provides an electronic device. Please refer to Figure 11 , Figure 11 which is a schematic structural diagram of an embodiment of the electronic device of this application. In this embodiment, the electronic device 70 includes a housing 71 and a third charge regulation circuit 72 connected to the housing 71.

[0109] It should be noted that the third charge regulation circuit 72 described in this embodiment is the first charge regulation circuit 20 or the second charge regulation circuit described in any of the above embodiments. For specific details, please refer to Figures 1 - 10 and the related textual content, which will not be elaborated here.

[0110] The beneficial effects of this application are as follows: Different from the prior art, the charge regulation method provided by this application detects the input voltage of the voltage conversion circuit to determine whether the input voltage is within a first threshold range. When the input voltage is within the first threshold range, a preset control signal is first sent to the voltage conversion circuit. When it is detected that the output voltage or output current is within a second threshold range, a drive control signal is generated using the output current and sent to the voltage conversion circuit to trigger the voltage conversion circuit to change its switching state. Thus, in the input voltage rising stage, that is, at the initial stage of power supply, the voltage conversion circuit can be controlled in a manner of first open-loop and then closed-loop, or first using a first closed-loop feedback control with a limited duty cycle and then using a second closed-loop feedback control with dynamic regulation. Before the voltage or current closed-loop access control is triggered, an output threshold voltage is established to effectively optimize the output current waveform and reduce the output current rise time, thereby effectively ensuring the power supply quality and stability, and also having good dynamic response performance.

[0111] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A charge regulation method, which is applied to the charge regulation of a voltage conversion circuit, is characterized in that The charge regulation method includes: Obtaining the input voltage of the voltage conversion circuit; Detecting whether the input voltage is within a first threshold range; If the input voltage is within the first threshold range, sending a preset control signal to the voltage conversion circuit; Obtaining the output voltage and / or output current of the voltage conversion circuit; Detecting whether the output voltage or the output current is within a second threshold range; If the output voltage or the output current is within the second threshold range, generating a drive control signal using the difference between zero current and the output current; Detecting the rising edge of a given pulse current; In response to the rising edge of the given pulse current, adjusting the drive control signal using the difference between the given pulse current and the output current; Sending the adjusted drive control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change its switching state, thereby adjusting the output current.

2. The charge regulation method according to claim 1, wherein Before the step of sending the preset control signal to the voltage conversion circuit, it further includes: Generating the preset control signal with a preset duty cycle.

3. The charge regulation method according to claim 1, wherein Before the step of sending the preset control signal to the voltage conversion circuit, it further includes: Generating the preset control signal using the difference between the lower limit value of the second threshold range and the output voltage.

4. The charge regulation method according to claim 1, characterized in that The step of adjusting the drive control signal using the difference between the given pulse current and the output current includes: Obtaining a target current integral value using the difference between the given pulse current and the output current; Obtaining the input current of the voltage conversion circuit; Performing integral regulation on the input current to obtain an integral reference value; Comparing the target current integral value with the integral reference value to obtain the drive control signal.

5. The charge regulation method according to claim 1, wherein After the step of obtaining the input voltage of the voltage conversion circuit and before the step of detecting whether the input voltage is within the first threshold range, it further includes: Detecting the rising edge of a given pulse current; In response to the rising edge of the given pulse current, performing the step of detecting whether the input voltage is within the first threshold range.

6. The charge regulation method according to claim 5, characterized in that, The charge regulation method further includes: If the input voltage is not within the first threshold range, returning to perform the step of detecting the rising edge of the given pulse current.

7. The charge regulation method according to claim 1, wherein The charge regulation method further includes: If the input voltage is within the first threshold range, detecting the rising edge of a given pulse current; In response to the rising edge of the given pulse current, sending a preset control signal to the voltage conversion circuit.

8. A charge regulation circuit, characterized in that, The charge regulation circuit is coupled to the voltage conversion circuit; Wherein, the charge regulation circuit performs charge regulation on the voltage conversion circuit using the charge regulation method described in any one of claims 1-7.

9. An electronic device, characterized in that, The electronic device includes a housing and a charge regulation circuit connected to the housing; Wherein, the charge regulation circuit is the charge regulation circuit described in claim 8.

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