Charge adjustment method, charge adjustment circuit, and electronic device

Abstract

The application discloses a charge regulation method, a charge regulation circuit and an electronic device. The charge regulation method comprises the following steps: acquiring an input voltage of a voltage conversion circuit; detecting whether the input voltage is located in a first threshold range; if the input voltage is located in the first threshold range, sending a preset control signal to the voltage conversion circuit; acquiring an output voltage and / or an output current of the voltage conversion circuit; detecting whether the output voltage or the output current is located in a second threshold range; if the output voltage or the output current is located in the second threshold range, generating a driving control signal by using the output current; and sending the driving control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change a switching state, so as to regulate the output current. In the foregoing manner, the charge regulation method can effectively optimize the output current waveform and reduce the output current rising time under the premise of avoiding triggering the overcurrent protection, so as to ensure the power supply quality and stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit control, in particular to a charge regulation method, a charge regulation circuit and an electronic device. BACKGROUND

[0002] Nowadays, with the increasing richness of electronic devices, the performance requirements of the power supply driving the electronic devices are increasingly stringent. In particular, in the power supply using a PI (Proportional Integral) control strategy to control the voltage conversion circuit, before the first current pulse of the reference output current arrives, 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, the first wave of the driving control signal has a process of establishing the output threshold voltage. For the voltage conversion circuit, the output voltage is small at this time. If the PI parameters of the closed-loop control are too large, the duty cycle of the driving control signal is large, which is easy to trigger the overcurrent protection. If the PI parameters of the closed-loop control are too small, the speed of increasing the duty cycle of the driving control signal is slow, which will lead to a slow current rise time, thereby affecting the power supply quality and stability. SUMMARY

[0003] The technical problem solved by the present 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 triggering the overcurrent protection and slow current rise time, thereby affecting the power supply quality and stability.

[0004] To solve the above technical problem, one technical solution adopted by the present application is to provide a charge regulation method applied to the charge regulation of a voltage conversion circuit, wherein the charge regulation method comprises: obtaining an input voltage of the voltage conversion circuit; detecting whether the input voltage is located in a first threshold range; if the input voltage is located in the first threshold range, sending a preset control signal to the voltage conversion circuit; obtaining an output voltage and / or an output current of the voltage conversion circuit; detecting whether the output voltage or the output current is located in a second threshold range; if the output voltage or the output current is located in the second threshold range, generating a driving control signal by using the output current; and sending the driving control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change the switching state, thereby regulating the output current.

[0005] Before the step of sending the preset control signal to the voltage conversion circuit, the method further comprises: generating the preset control signal by using a preset duty cycle.

[0006] Before the step of sending the preset control signal to the voltage conversion circuit, the method further comprises: generating the preset control signal by using a difference between a lower limit value of the second threshold range and the output voltage.

[0007] The generating the driving control signal by using the difference between the zero current and the output current comprises: generating the driving control signal by using the difference between the given pulse current and the output current; detecting a rising edge of the given pulse current; and adjusting the driving control signal by using the difference between the given pulse current and the output current in response to the rising edge of the given pulse current.

[0008] The adjusting the driving control signal by using the difference between the given pulse current and the output current comprises: generating a target current integral value by using the difference between the given pulse current and the output current; obtaining an input current of the voltage conversion circuit; integrating the input current to obtain an integral reference value; and comparing the target current integral value with the integral reference value to obtain the driving control signal.

[0009] After the obtaining the input voltage of the voltage conversion circuit, and before the detecting whether the input voltage is in the first threshold range, the method further comprises: detecting a rising edge of the given pulse current; and performing the detecting whether the input voltage is in the first threshold range in response to the rising edge of the given pulse current.

[0010] The method further comprises: if the input voltage is not in the first threshold range, returning to the detecting the rising edge of the given pulse current.

[0011] The method further comprises: if the input voltage is in the first threshold range, detecting a rising edge of the given pulse current; and sending a preset control signal to the voltage conversion circuit in response to the rising edge of the given pulse current.

[0012] To solve the above technical problems, another technical solution adopted by the present application is to provide a charge regulation circuit, wherein the charge regulation circuit is coupled to a voltage conversion circuit; and the charge regulation circuit uses the charge regulation method according to any one of the above to regulate the charge of the voltage conversion circuit.

[0013] To solve the above technical problems, another technical solution adopted by the present application is to provide an electronic device, wherein the electronic device comprises a shell and a charge regulation circuit connected to the shell; and the charge regulation circuit is the charge regulation circuit as described above.

[0014] The beneficial effects of the present application are: different from the prior art, the charge regulation method provided by the present application detects whether the input voltage is located in the first threshold range by acquiring the input voltage of the voltage conversion circuit, and first sends a preset control signal to the voltage conversion circuit when the input voltage is located in the first threshold range, and then generates a driving control signal by using the output current and sends the driving control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change the switching state when the output voltage or the output current is located in the second threshold range, so that the voltage conversion circuit can be controlled in the input voltage boosting stage, that is, in the initial stage of power supply, by using the open-loop first and then closed-loop method, or first using the first closed-loop feedback control of limiting the empty proportion, and then using the second closed-loop feedback control of dynamic adjustment, to avoid triggering the over-current protection, establish the output threshold voltage before the voltage or current closed-loop access control, effectively optimize the output current waveform, and reduce the output current rise time, thereby effectively guaranteeing the power supply quality and stability, and the dynamic response performance is also good. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 is a flowchart of the first embodiment of the charge regulation method of the present application;

[0017] Figure 2 is a structural schematic diagram of the first embodiment of the charge regulation circuit of the present application;

[0018] Figure 3 is Figure 1 is a flowchart of an embodiment of S16 in the method;

[0019] Figure 4 is Figure 3 is a flowchart of an embodiment of S163 in the method;

[0020] Figure 5 is a structural schematic diagram of the second embodiment of the charge regulation circuit of the present application;

[0021] Figure 6 is Figure 4 is a logic framework diagram of signal processing in the charge regulation method;

[0022] Figure 7 is Figure 7 is a waveform schematic diagram of an embodiment of each related signal in the charge regulation method;

[0023] Figure 8 is a flowchart of a second embodiment of the charge adjustment method of the present application;

[0024] Figure 9 is Figure 8 is a waveform diagram of an embodiment of each relevant signal in the charge adjustment method;

[0025] Figure 10 is a flowchart of a third embodiment of the charge adjustment method of the present application;

[0026] Figure 11 is a structural diagram of an embodiment of the electronic device of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] The terms "first", "second", "third" in the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications 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 can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] The application will be described in detail below with reference to the accompanying drawings and embodiments.

[0031] Please refer to Figure 1 and Figure 2 , wherein, Figure 1 is a flowchart of the first embodiment of the charge adjustment method of the application, Figure 2 is a structural schematic diagram of the first embodiment of the charge adjustment circuit of the application. Specifically, it can include the following steps:

[0032] S11: Obtain the input voltage of the voltage conversion circuit.

[0033] It can be understood that the charge adjustment method in this embodiment is specifically applied to the charge adjustment of the first voltage conversion circuit 30 as shown in Figure 2 ; wherein the first charge adjustment circuit 20 uses any of the charge adjustment methods described herein to achieve charge adjustment on the first voltage conversion circuit 30.

[0034] It is worth noting that the first voltage conversion circuit 30 can specifically be a single-phase BUCK circuit (buck conversion circuit), a multi-phase BUCK circuit, or a BOOST circuit (boost conversion circuit), or any other reasonable form of circuit topology, and the present embodiment does not limit this.

[0035] In some embodiments, the first charge adjustment circuit 20 can specifically include one of any reasonable circuit unit with signal processing function, such as 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, etc., and the present application does not limit this.

[0036] In addition, "coupling" in this article refers to including any direct and indirect connection means. Therefore, if the first circuit is described as being coupled to the second circuit, it means that the first circuit can be directly connected to the second circuit through electrical connection or wireless transmission, optical transmission, etc. Signal connection method, or indirectly electrically connected or signal connected to the second circuit through other circuits or connection means.

[0037] Specifically, the first charge adjustment circuit 20 monitors the input voltage of the first voltage conversion circuit 30 in real time, that is, the input voltage of the first voltage conversion circuit 30 provided by the external power supply.

[0038] The input voltage can be obtained by any reasonable sampling method such as a voltage sensor, a sampling resistor or a circuit model estimation, and the present application does not limit the same.

[0039] S12: detecting whether the input voltage is in the first threshold range.

[0040] It can be understood that the first threshold range corresponds to a threshold voltage range determined by the input voltage of the first voltage conversion circuit 30, so that when the input voltage is detected in the first threshold range, it can be determined that the input voltage has been input and enters the pre-charge state.

[0041] If the input voltage is in the first threshold range, S13 is performed, and if the input voltage is not in the first threshold range, S11 is returned.

[0042] S13: sending a preset control signal to the voltage conversion circuit.

[0043] It can be understood that in the input voltage boosting stage, i.e. in the initial stage of power supply, the output voltage of the first voltage conversion circuit 30 is small, and the rising slope of the inductor current is large. If the PI parameters of the voltage or current closed-loop control are too large, i.e. the duty cycle of the control signal is large, the inductor current overcurrent protection is easily triggered, and therefore the duty cycle of the control signal needs to be limited.

[0044] Specifically, the first charge adjustment circuit 20 sets a control signal with a suitable duty cycle, i.e. a preset control signal, according to the actual power supply demand, and sends the preset control signal to the first voltage conversion circuit 30 to trigger the change of the switching state, so as to adjust the output voltage and output current of the first voltage conversion circuit 30.

[0045] In some embodiments, the driving control signal can be one or more of a PWM (Pulse Width Modulation) signal or a PFM (Pulse Frequency Modulation) signal, and the present application does not limit the same.

[0046] In some embodiments, the duty cycle of the preset control signal can be a constant value and less than a set threshold, or the duty cycle varies as a preset function with time as the independent variable and is limited within a set threshold, or the duty cycle is determined by a closed-loop control realized according to the output voltage and / or the output current and is limited within a set threshold, or the duty cycle is dynamically changed according to a voltage closed-loop control defined by a reference voltage. In order to distinguish from the subsequent closed-loop control, the first closed-loop feedback control can be defined, and the present application does not limit the same.

[0047] It is worth mentioning that the set threshold is specifically set at the initial stage of the input voltage to avoid triggering the inductor current overcurrent protection, and the application does not limit this.

[0048] S14: Obtain the output voltage and / or output current of the voltage conversion circuit.

[0049] The output voltage and / or output current of the first voltage conversion circuit 30 are sampled.

[0050] S15: Detect whether the output voltage or output current is within the second threshold range.

[0051] 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.

[0052] It is worth mentioning that the second threshold range can be a voltage threshold range or a current threshold range; the lower limit of the voltage threshold range can be set according to the threshold voltage corresponding to the rated output voltage when the load is normally working, and is less than the threshold voltage, and can be 50%-85% of the threshold voltage; the lower limit of the current threshold range can be set according to the threshold current corresponding to the rated output current when the load is normally working, and is less than the threshold current, and can be 50%-85% of the threshold current, and the application does not limit this.

[0053] If the output voltage is within the second threshold range, or the output current is within the second threshold range, S16 is executed, and if the output voltage is not within the second threshold range, or the output current is not within the second threshold range, S13 is returned to be executed.

[0054] S16: Generate a drive control signal using the output current.

[0055] 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 a PID (Proportional Integral Derivative) controller or any other reasonable feedback control algorithm can be used to process the currently obtained output current to obtain a drive control signal, and the duty cycle of the drive control signal is dynamically adjusted. To distinguish from the aforementioned closed-loop control, it can be defined as a second closed-loop feedback control, and the application does not limit this.

[0056] S17: Send the drive control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change the switching state, thereby adjusting the output current.

[0057] The driving control signal in dynamic adjustment is sent 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.

[0058] It is understandable that the first charge regulation circuit 20 can specifically divide the control stage into two stages according to the output voltage or the output current after the input voltage is established, and in the first stage, that is, the pre-charging stage when the input voltage is within the first threshold range but the output voltage or the output current is lower than the second threshold range, a preset control signal with a limited duty cycle is used to implement open-loop or first closed-loop feedback control; and in the second stage, that is, the current closed-loop control stage when the output voltage or the output current is within the second threshold range, a drive control signal is used to implement second closed-loop feedback control, so that in the input voltage boosting stage, that is, the initial power supply stage, an open-loop followed by a closed-loop method is adopted, or first a first closed-loop feedback control with a limited duty cycle is adopted, and then a dynamically adjusted second closed-loop feedback control is adopted to control the first voltage conversion circuit 30, so as to avoid triggering overcurrent protection. Before the voltage or current closed-loop is connected to the control, the 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 the dynamic response performance is also good.

[0059] Furthermore, in one embodiment, the above S13 may specifically include: generating a preset control signal by using a preset duty cycle.

[0060] It is understandable that the preset duty cycle can be a constant value, or can be less than a set threshold value, and can change as a preset function with time as the independent variable, which is not limited in this application.

[0061] Furthermore, in one embodiment, the above S13 may further specifically include: generating a preset control signal by using the difference between the lower limit value of the second threshold range and the output voltage.

[0062] It is understandable that the preset control signal can also implement voltage feedback regulation based on the difference between the lower limit value of the second threshold range and the output voltage, so as to avoid triggering overcurrent protection due to excessive duty cycle by limiting the reference voltage.

[0063] Please continue reading Figure 3 , Figure 3 yes Figure 1 Flowchart of S16 in an embodiment. In one embodiment, the charge adjustment method of the present application includes, in addition to the above S11-S17, further including some more specific steps. Specifically, the above S16 may further include the following steps:

[0064] S161: Generate a driving control signal using the difference between the zero current and the output current.

[0065] It is worth noting that when it is determined that the output voltage or output current is within the second threshold range, the current closed-loop feedback control is entered, and at this time, the reference current used as the control target, that is, before the first wave of the given pulse current arrives, can be understood as the given pulse current being 0.

[0066] Specifically, before obtaining the first wave of the given pulse current, the first charge regulation circuit 20 subtracts the currently obtained output current from the zero current to obtain a current difference, and performs proportional-integral regulation on the current difference to obtain a drive control signal.

[0067] S162: Detect the rising edge of the given pulse current.

[0068] It is understandable 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; wherein the first rising edge obtained by the first charge regulation circuit 20 determines the arrival of the first wave of the given pulse current.

[0069] Specifically, the first charge regulation circuit 20 identifies and detects the rising edge of a given pulse current. 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.

[0070] S163: In response to the rising edge of the given pulse current, a driving control signal is obtained by adjusting the difference between the given pulse current and the output current.

[0071] 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 the current difference can be proportionally integrated to adjust the output modulation duty cycle reference signal, that is, the drive control signal.

[0072] It can be understood that before the arrival of the first wave of the given pulse current, due to the existence of the pre-charging stage, the output voltage or output current is in the second threshold range, that is, the output threshold voltage has been established, so the rise time of the output current when the first given pulse current of the first voltage conversion circuit 30 arrives can be effectively improved, and the rise time is consistent with the rise process of the subsequent given pulse current after it stabilizes, that is, the non-first current pulse, which can effectively achieve the purpose of optimizing the waveform and reducing the rise time, and optimize the consistency of the output current.

[0073] Please continue reading Figure 4 , Figure 4 yes Figure 3Flowchart of S163 in an embodiment. In an embodiment, the charge regulation method of the present application further comprises some more specific steps in addition to S161-S163. Specifically, S163 can further comprise the following steps:

[0074] S1631: Obtain the target current integral value by using the difference between the given pulse current and the output current.

[0075] Please continue to refer to Figure 5 , Figure 5 is a structural diagram of the second embodiment of the charge regulation circuit of the present application.

[0076] It can be understood that the charge regulation method in the present embodiment can be implemented by the second charge regulation circuit (not shown in the figure) to the second voltage conversion circuit 40 as shown in Figure 5 for regulating the output of the second voltage conversion circuit 40 to supply power to the load circuit 101. The second voltage conversion circuit 40 comprises a switching sub-circuit 41 and a regulation output sub-circuit 42, the switching sub-circuit 41 comprises a first switch Q1, a second switch Q2 and a third switch Q3, the regulation output sub-circuit 42 comprises 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, and the load circuit 101 comprises an equivalent diode DF and an equivalent resistor R1.

[0077] The first end of the first switch Q1 is coupled to the first end of the second switch Q2 and the first end of the third switch Q3, and is used to be coupled to the first end of the DC power supply DC, the second end of the first switch 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 switch 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 switch 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 end of the first switch Q1, the third end of the second switch Q2 and the third end of the third switch Q3 are all coupled to the second charge regulation circuit.

[0078] In some embodiments, the first switch Q1, the second switch Q2 and the third switch Q3 can be specifically one of a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), a transistor, a thin film transistor or a field effect transistor, or any other reasonable switch, which is not limited in the present application.

[0079] In other embodiments, the second voltage conversion circuit 40 can also be specifically 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 can also include one or more of an equivalent series resistor, an equivalent capacitor, an equivalent series diode, or any other reasonable circuit element, which is not limited in the present embodiment.

[0080] Please continue to refer to Figure 6 and Figure 7 wherein, Figure 6 is Figure 4 a logical block diagram of signal processing in the charge regulation method, Figure 7 is Figure 4 a waveform diagram of an embodiment of each related signal in the charge regulation method.

[0081] For ease of understanding, the second voltage conversion circuit 40 is taken as an example to illustrate the three-phase BUCK circuit described above. When the input voltage is detected to be established, that is, when the input voltage is within the first threshold range, the pre-charging stage is entered, so that the control signal G is a preset control signal, that is, the control signal G includes phase-staggered first control signal G1, first control signal G2 and first control signal G3, and the duty cycle is constant or limited, so that the first control signal G1, the first control signal G2 and the first control signal G3 can be used to trigger the first switch Q1, the second switch Q2 and the third switch Q3 to conduct or turn off, respectively, thereby regulating the output voltage or the output current Io.

[0082] When it is detected whether the output voltage or the output current Io is within the second threshold range, the current closed-loop control stage is entered, so that the control signal G is a driving control signal, that is, the given pulse current Iref is subtracted from the output current Io to obtain a current difference value, and the target current integral value is obtained by proportionally integrating the current difference value.

[0083] S1632: Obtain the input current of the voltage conversion circuit.

[0084] Further, the first input current Iin1, the second input current Iin2 and the third input current Iin3 are respectively sampled from the first switch Q1, the second switch Q2 and the third switch Q3.

[0085] S1633: The input current is integrated to obtain an integral reference value.

[0086] The first input current Iin1, the second input current Iin2 and the third input current Iin3 are respectively used to charge corresponding integral capacitors to perform integral adjustment to obtain the first integral reference value, the second integral reference value and the third integral reference value.

[0087] S1634: The target current integral value is compared with the integral reference value to obtain a drive control signal.

[0088] The target current integral value is compared with the first integral reference value, the second integral reference value and the third integral reference value to obtain the first control signal G1, the first control signal G2 and the first control signal G3. For example, the moment when the target current integral value is equal to the first integral reference value is determined as the off moment of the first control signal G1, i.e. the falling edge, and the rising edge of the first control signal G1 is determined according to the set switching period, and the first control signal G2 and the first control signal G3 are respectively obtained according to the signal processing logic.

[0089] It is worth noting that before the rising edge of the given pulse current Iref comes, specifically when the given pulse current Iref is 0, the first control signal G1, the first control signal G2 and the first control signal G3 are respectively generated according to the above signal processing logic, and when the rising edge of the given pulse current Iref is detected, the first control signal G1, the first control signal G2 and the first control signal G3 are respectively generated and dynamically adjusted by using the given pulse current Iref.

[0090] In addition, when the number of switches in the switching subcircuit 41 is 1, 2 or 4 or any reasonable number, the number of the control signal G and the corresponding signals is also 1, 2 or 4 or any reasonable number, which will not be described here.

[0091] As can be seen from the above, by limiting the duty cycle of the control signal G in the pre-charge phase, the process of establishing the threshold voltage before the first wave of the given pulse current Iref can be effectively avoided. When the output voltage is small, the first inductor current I L1 , the second inductor current I L2 and the third inductor current I L3The rising slope of the given pulse current is relatively large to trigger the inductance current overcurrent protection, and the output threshold voltage is established before the given pulse current Iref arrives, which can effectively improve the rising time of the output current Io when the first given pulse current Iref arrives, and the rising time is consistent with the rising process of the subsequent given pulse current Iref, that is, the rising process of 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.

[0092] Please refer to Figure 8 , Figure 8 is a flowchart of the second embodiment of the charge adjustment method of the present application. The charge adjustment method of the present embodiment is a detailed embodiment of the charge adjustment method in Figure 1 , and specifically includes the following steps:

[0093] S51: Obtain the input voltage of the voltage conversion circuit.

[0094] Wherein, S51 is the same as S11 in Figure 1 , please refer to S11 and its related text description, which will not be repeated here.

[0095] S52: Detect the rising edge of the given pulse current.

[0096] Please continue to refer to Figure 9 , Figure 9 is a waveform diagram of an embodiment of each related signal of the charge adjustment method in Figure 8 .

[0097] It can be understood that the charge adjustment method of the present embodiment is different from the charge adjustment method in Figure 1 in that there is no current closed-loop feedback waiting state, but the output threshold voltage is established when the rising edge of the given pulse current arrives, that is, the rising edge of the given pulse current is used as the starting trigger condition of the charge adjustment in the pre-charge phase.

[0098] Specifically, when the input voltage is obtained, the rising edge of the given pulse current is identified and detected.

[0099] And in other embodiments, specifically, the input voltage can also be obtained after detecting the rising edge of the given pulse current.

[0100] S53: In response to the rising edge of the given pulse current, detect whether the input voltage is located in the first threshold range.

[0101] When the rising edge of the given pulse current is detected, that is, the first wave arrives, it is detected whether the currently obtained input voltage is located in the first threshold range, and the pre-charge is started.

[0102] S54: sending the preset control signal to the voltage conversion circuit.

[0103] S55: obtaining an output voltage and / or an output current of the voltage conversion circuit.

[0104] S56: detecting whether the output voltage or the output current is within a second threshold range.

[0105] S57: generating a driving control signal using the output current.

[0106] S58: sending the driving control signal to the voltage conversion circuit to trigger the voltage conversion circuit to change a switching state so as to adjust the output current.

[0107] wherein S54, S55, S56, S57 and S58 are the same as S13, S14, S15, S16 and S17 in Figure 1 , and details are referred to S13, S14, S15, S16 and S17 and related descriptions, which will not be repeated here.

[0108] Please refer to Figure 10 , Figure 10 is a flowchart of a third embodiment of the charge adjustment method of the present application. The charge adjustment method of the present embodiment is a detailed embodiment of the charge adjustment method in Figure 1 , and specifically comprises the following steps:

[0109] S61: obtaining an input voltage of the voltage conversion circuit.

[0110] wherein S61 is the same as S11 in Figure 1 , and details are referred to S11 and related descriptions, which will not be repeated here.

[0111] S62: detecting whether the input voltage is within a first threshold range.

[0112] detecting whether the currently obtained input voltage is within the first threshold range.

[0113] wherein if the input voltage is within the first threshold range, S63 is performed, and if the input voltage is not within the first threshold range, S61 is returned to be performed.

[0114] S63: detecting a rising edge of a given pulse current.

[0115] It can be understood that the charge adjustment method of the present embodiment is the same as Figure 1The charge regulation method in the first aspect is different from the charge regulation method in the second aspect in that there is no current closed-loop feedback control waiting state, but the output threshold voltage is started to be established when it is determined that the input voltage has been established and the rising edge of the given pulse current arrives, i.e., the rising edge of the given pulse current is used as a starting trigger condition for starting the charge regulation in the pre-charge phase.

[0116] Specifically, the rising edge of the given pulse current is identified and detected when it is determined that the input voltage is in the first threshold range.

[0117] S64: In response to the rising edge of the given pulse current, a preset control signal is sent to the voltage conversion circuit.

[0118] When the rising edge of the given pulse current is detected, i.e., it is determined that the first wave arrives, the pre-charge phase is entered, and the preset control signal is sent to the first voltage conversion circuit 30 to trigger the first voltage conversion circuit 30 to change the switching state, so as to regulate the output voltage and the output current of the first voltage conversion circuit 30.

[0119] S65: The output voltage and / or the output current of the voltage conversion circuit are acquired.

[0120] S66: Whether the output voltage or the output current is in the second threshold range is detected.

[0121] S67: The output current is used to generate a driving control signal.

[0122] S68: 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 regulate the output current.

[0123] Wherein, S65, S66, S67 and S68 are the same as S14, S15, S16 and S17 in the second aspect, and specific reference can be made to S14, S15, S16 and S17 and the related textual description, which will not be repeated here. Figure 1

[0124] The present application also provides an electronic device, please refer to Figure 11 , Figure 11 is a structural schematic diagram of an embodiment of the electronic device of the present application. In the embodiment, the electronic device 70 includes a housing 71 and a third charge regulation circuit 72 connected to the housing 71.

[0125] It should be noted that the third charge regulation circuit 72 described in the embodiment is the first charge regulation circuit 20 or the second charge regulation circuit described in any of the above embodiments, and specific reference can be made to Figures 1-10 and the related textual content, which will not be repeated here.

[0126] ​The application has the beneficial effect that, different from the prior art, the charge adjustment method provided by the application detects whether the input voltage is located in the first threshold range by acquiring the input voltage of the voltage conversion circuit, and when the input voltage is located in the first threshold range, first sends the preset control signal to the voltage conversion circuit, and when the output voltage or the output current is located in the second threshold range, generates the driving control signal by using the output current, sends the driving control signal to the voltage conversion circuit, and triggers the voltage conversion circuit to change the switching state, so that the voltage conversion circuit can be controlled in the input voltage boosting stage, that is, in the initial stage of power supply, by using the open-loop first and then closed-loop mode, or first using the first closed-loop feedback control of limiting the empty proportion, and then using the second closed-loop feedback control of dynamic adjustment, to avoid triggering the overcurrent protection, and to establish the output threshold voltage before the voltage or current closed-loop access control, so as to effectively optimize the output current waveform and reduce the output current rise time, thereby effectively ensuring the power supply quality and stability, and the dynamic response performance is also good.

[0127] The above is only an embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent flow transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A charge regulation method, applied to charge regulation of a voltage conversion circuit, characterized in that: The charge adjustment method comprises: obtaining an 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 an 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 a difference between zero current and the output current; Detect the rising edge of a given pulse current; In response to a rising edge of the given pulse current, obtaining a target current integral value by using a difference between the given pulse current and the output current; obtaining an 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; The adjusted 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.

2. The charge adjustment method according to claim 1, wherein: Before the step of sending the preset control signal to the voltage conversion circuit, the method further includes: The preset control signal is generated using a preset duty cycle.

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

4. The charge adjustment 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, the method further includes: Detect the rising edge of a given pulse current; In response to a rising edge of the given pulse current, the step of detecting whether the input voltage is within a first threshold range is performed.

5. The charge adjustment method according to claim 4, wherein: The charge adjustment method further includes: If the input voltage is not within the first threshold range, the process returns to the step of detecting the rising edge of the given pulse current.

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

7. A charge regulation circuit, characterized in that: The charge regulation circuit is coupled to the voltage conversion circuit; The charge regulation circuit performs charge regulation on the voltage conversion circuit using the charge regulation method according to any one of claims 1 to 6.

8. An electronic device, characterized in that: The electronic device includes a housing and a charge regulating circuit connected to the housing; Wherein, the charge regulation circuit is the charge regulation circuit as claimed in claim 7.

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