WO2016202004A1 - Soft start control method and apparatus for voltage conversion circuit - Google Patents
Soft start control method and apparatus for voltage conversion circuit Download PDFInfo
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- WO2016202004A1 WO2016202004A1 PCT/CN2016/074272 CN2016074272W WO2016202004A1 WO 2016202004 A1 WO2016202004 A1 WO 2016202004A1 CN 2016074272 W CN2016074272 W CN 2016074272W WO 2016202004 A1 WO2016202004 A1 WO 2016202004A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- a DC/DC (DC/DC) voltage conversion circuit is often soft-started by gradually increasing the reference voltage of the loop at a certain slope, and the slope of the reference voltage rise is divided into one or two segments.
- the DC/DC voltage conversion circuit meets the power-on condition, its reference voltage is gradually increased, and the output voltage is gradually increased by the negative feedback control of the entire loop, and remains unchanged when the reference voltage rises to a preset value.
- the output voltage is also kept constant, enabling soft-start of the power supply output.
- the rising slope of the same reference voltage has a large difference in the starting waveform under different loads. Under some loads, the output voltage will cause the platform voltage to appear, and even the trench will appear.
- the related technology is difficult to meet the monotonic waveform of the full load range. demand.
- the soft start of the voltage conversion circuit is controlled to end.
- configuring a current rising slope of the reference voltage according to a load size includes: configuring a current rising slope of the reference voltage to be a first slope when a current output voltage is greater than the voltage threshold; When the current output voltage is less than the voltage threshold, the current rising slope of the reference voltage is configured as a second slope; the first slope is greater than the second slope.
- the method before acquiring the current reference voltage and the output voltage in the voltage conversion circuit, the method further includes: setting an initial reference voltage according to a soft start duration and a normal working voltage of the voltage conversion circuit; or The initial reference voltage is set to the current output voltage.
- a slope configuration module configured to configure a current rising slope of the reference voltage according to a load size, and to control the reference voltage to be adjusted according to the rising slope, wherein a smaller the load, a configured rising slope is larger;
- the method further includes: a determining module configured to determine whether the current reference voltage is greater than a preset voltage; and the slope configuration module is further configured to: when the determining result of the determining module is yes And configuring a current rising slope of the reference voltage to be a third slope, where the third slope is smaller than a rising slope of a previous moment of the reference voltage.
- the soft start control method and device for the voltage conversion circuit determine the load magnitude of the current circuit by acquiring the reference voltage and the output voltage in the current circuit, thereby configuring the current rising slope of the reference voltage according to the load size. And the control reference voltage is increased according to the current rising slope, and the soft start is ended when the reference voltage and/or the output voltage rise to the normal operating voltage.
- the output voltage of the closed-loop control with the reference voltage can also rise synchronously according to the rising rule of the reference voltage, so that the waveform of the starting voltage process of the output voltage of the entire circuit does not differ.
- the larger case satisfies the monotonic demand of the starting waveform in the full load range; and by adjusting the rising slope of the reference voltage, the soft start time of the power supply can be flexibly changed to meet the rise time requirements of different application scenarios.
- FIG. 4 is a schematic structural diagram of a soft start control device for a voltage conversion circuit according to Embodiment 2 of the present invention.
- S102 Configure a current rising slope of the reference voltage according to a load size, and control the reference The voltage is adjusted according to the rising slope, and the smaller the load, the larger the configured rising slope;
- the method further includes: determining whether the current reference voltage is greater than a preset voltage, and if yes, setting a current rising slope of the reference voltage to a third slope, The third slope is smaller than the rising slope of the previous time of the reference voltage.
- the setting of the preset voltage is generally set to be close to the normal working voltage. Since the load is getting smaller and smaller when the reference voltage rises, when it approaches the normal working voltage, the rising speed is faster. Setting a preset voltage to determine the rise of the reference voltage, and in the case that it is close to the normal operating voltage, in order to prevent the output voltage from appearing too fast, exceeding the normal operating voltage, the reference voltage is greater than the preset voltage.
- S209 detecting whether the reference voltage is greater than or equal to the normal working voltage of 12V; if yes, then going to S210, if not, then going to S209;
- S302 delay 1ms, detect the current actual output voltage value, and determine the current load size according to the detected actual output voltage value
- S308 detecting whether the reference voltage is greater than or equal to the normal working voltage 12V; if yes, then going to S309; if not, then going to S307;
- the load estimation module 401 may include: a load determination submodule configured to compare the reference voltage and the magnitude of the output voltage to determine a load size of a current circuit; or, a setting submodule configured to set at least one voltage a threshold, the voltage threshold being less than the reference voltage; comparing submodules a block configured to compare the output voltage with a magnitude of the at least one voltage threshold; a load estimation sub-module configured to determine a size of the load based on a comparison result of the comparison sub-module;
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Abstract
A soft start control method and apparatus for a voltage conversion circuit. The method comprises: acquiring a current reference voltage and output voltage in a voltage conversion circuit, and determining, based on the reference voltage and the output voltage, a current load of the circuit (S101); configuring, according to the load, a current rising slope of the reference voltage, and controlling the reference voltage to be adjusted according to the rising slope, the configured rising slope being larger while the load is smaller (S102); and controlling, when the reference voltage and/or the output voltage rise(s) to a normal working voltage(s), soft start of the voltage conversion circuit to be ended (S103). The problem of occurrence of a start-up waveform plateau or hook caused by non-matching of a rising slope of a reference voltage and a load in a circuit is resolved, and the demand for start-up waveform monotonicity within a full load range is met.
Description
本申请涉及电源启动领域技术，例如涉及一种电压变换电路的软启动控制方法及装置。The present application relates to the field of power-starting technology, for example, to a soft-start control method and apparatus for a voltage conversion circuit.
在电源的应用场景中，普遍要求电源的输出电压从启动到稳定的过程中是缓慢且单调的上升，从而避免可能引起的电压过冲而导致系统或芯片损坏，并避免可能引起的电压上升不单调而导致的系统或芯片反复开关或时序错乱等现象的出现。同时，不同的系统应用场景往往会对电源输出的上升时间提出相应的要求，考虑成本、体积等因素，这对电源软启动控制提出一定的挑战。In the application scenario of the power supply, it is generally required that the output voltage of the power supply rises slowly and monotonously from the startup to the stable process, thereby avoiding possible voltage overshoot and causing damage to the system or the chip, and avoiding possible voltage rise. Monotonous system or chip repeated switching or timing disorder. At the same time, different system application scenarios often put forward corresponding requirements for the rise time of the power output, considering the cost, volume and other factors, which poses certain challenges to the soft start control of the power supply.
在相关技术中，对于DC/DC(直流/直流)电压变换电路常采用按一定斜率逐步抬高环路的基准电压的方式进行软启动，其基准电压上升斜率多分为一段或两段。当DC/DC电压变换电路满足开机条件时，其基准电压逐步升高，通过整个环路的负反馈控制使得输出电压也逐步上升，当基准电压上升到预设值时保持不变，此时，输出电压也保持恒定值，从而实现电源输出的软启动功能。但存在相同基准电压的上升斜率在不同负载下的起机波形差异较大，部分负载下会导致输出波形出现平台电压，甚至出现回沟，相关技术很难满足全负载范围的起机波形单调的需求。In the related art, a DC/DC (DC/DC) voltage conversion circuit is often soft-started by gradually increasing the reference voltage of the loop at a certain slope, and the slope of the reference voltage rise is divided into one or two segments. When the DC/DC voltage conversion circuit meets the power-on condition, its reference voltage is gradually increased, and the output voltage is gradually increased by the negative feedback control of the entire loop, and remains unchanged when the reference voltage rises to a preset value. The output voltage is also kept constant, enabling soft-start of the power supply output. However, the rising slope of the same reference voltage has a large difference in the starting waveform under different loads. Under some loads, the output voltage will cause the platform voltage to appear, and even the trench will appear. The related technology is difficult to meet the monotonic waveform of the full load range. demand.
发明内容Summary of the invention
本发明实施例提供了一种电压变换电路的软启动控制方法及装置，解决了相关技术中由于基准电压上升斜率设置与电路中的负载不匹配而导致的起机波形出现平台或回钩的问题。Embodiments of the present invention provide a soft start control method and apparatus for a voltage conversion circuit, which solves the problem of a platform or a hook of an initial waveform caused by a mismatch between a reference voltage rising slope setting and a load in a circuit in the related art. .
为解决上述技术问题，本发明实施例提供一种电压变换电路的软启动控制方法，包括：To solve the above technical problem, an embodiment of the present invention provides a soft start control method for a voltage conversion circuit, including:
获取所述电压变换电路中当前的基准电压及输出电压，基于所述基准电压及输出电压确定当前电路的负载大小；
Obtaining a current reference voltage and an output voltage in the voltage conversion circuit, and determining a load size of the current circuit based on the reference voltage and the output voltage;
根据负载大小配置所述基准电压当前的上升斜率，并控制所述基准电压根据所述上升斜率进行调整，所述负载越小，所配置的上升斜率越大；Configuring a current rising slope of the reference voltage according to a load size, and controlling the reference voltage to be adjusted according to the rising slope, and the smaller the load, the larger the configured rising slope;
当所述基准电压和/或输出电压上升到正常工作电压时，控制所述电压变换电路的软启动结束。When the reference voltage and/or the output voltage rises to a normal operating voltage, the soft start of the voltage conversion circuit is controlled to end.
在本发明的一种实施方式中，基于所述基准电压及输出电压确定当前电路的负载大小包括：比较当前的基准电压和输出电压的大小以确定当前电路的负载大小；或者，设置至少一个电压阈值，所述电压阈值小于所述基准电压；比较所述输出电压与所述至少一个电压阈值的大小；根据所述输出电压与所述电压阈值的大小确定当前电路的负载大小。In an embodiment of the present invention, determining a load size of the current circuit based on the reference voltage and the output voltage includes: comparing a current reference voltage and an output voltage to determine a load size of the current circuit; or setting at least one voltage a threshold value, the voltage threshold is less than the reference voltage; comparing the output voltage with a magnitude of the at least one voltage threshold; determining a load size of the current circuit according to the output voltage and the magnitude of the voltage threshold.
在本发明的一种实施方式中，设置一个电压阈值时，比较当前的输出电压与所述电压阈值的大小；当所述输出电压大于所述电压阈值时，以确定当前电路的负载较小，当所述输出电压不大于所述电压阈值时，以确定当前电路的负载较大。In an embodiment of the present invention, when a voltage threshold is set, a current output voltage is compared with a magnitude of the voltage threshold; when the output voltage is greater than the voltage threshold, determining that a current circuit load is small, When the output voltage is not greater than the voltage threshold, it is determined that the load of the current circuit is large.
在本发明的一种实施方式中，根据负载大小配置所述基准电压当前的上升斜率包括：在当前的输出电压大于所述电压阈值时，配置所述基准电压当前的上升斜率为第一斜率；在当前的输出电压小于所述电压阈值时，配置所述基准电压当前的上升斜率为第二斜率；所述第一斜率大于所述第二斜率。In an embodiment of the present invention, configuring a current rising slope of the reference voltage according to a load size includes: configuring a current rising slope of the reference voltage to be a first slope when a current output voltage is greater than the voltage threshold; When the current output voltage is less than the voltage threshold, the current rising slope of the reference voltage is configured as a second slope; the first slope is greater than the second slope.
在本发明的一种实施方式中，根据负载大小配置所述基准电压当前的上升斜率包括：建立输出电压与上升斜率之间的函数关系，所述输出电压越大，所述上升斜率越大；根据当前采集到的输出电压得到基准电压当前的上升斜率。In an embodiment of the present invention, configuring a current rising slope of the reference voltage according to a load size includes: establishing a function relationship between an output voltage and a rising slope, the larger the output voltage, the larger the rising slope; The current rising slope of the reference voltage is obtained based on the currently collected output voltage.
在本发明的一种实施方式中，获取所述电压变换电路中当前的基准电压及输出电压之前还包括：根据所述电压变换电路的软启动时长及正常工作电压设置初始基准电压；或者，将初始基准电压设置为当前输出电压。In an embodiment of the present invention, before acquiring the current reference voltage and the output voltage in the voltage conversion circuit, the method further includes: setting an initial reference voltage according to a soft start duration and a normal working voltage of the voltage conversion circuit; or The initial reference voltage is set to the current output voltage.
在本发明的一种实施方式中，控制所述基准电压根据所述上升斜率进行调整之后还包括：判断当前的基准电压是否大于预设电压，若是，则设置所述基准电压当前的上升斜率为第三斜率，所述第三斜率比所述基准电压前一时刻的上升斜率小。In an embodiment of the present invention, after the adjusting the reference voltage is adjusted according to the rising slope, the method further includes: determining whether the current reference voltage is greater than a preset voltage, and if yes, setting a current rising slope of the reference voltage to a third slope, the third slope being smaller than a rising slope of a previous moment of the reference voltage.
为解决上述技术问题，本发明实施例提供一种电压变换电路的软启动控制装置，包括：
To solve the above technical problem, an embodiment of the present invention provides a soft start control device for a voltage conversion circuit, including:
负载估算模块，被配置为获取所述电压变换电路中当前的基准电压及输出电压，基于所述基准电压及输出电压确定当前电路的负载大小；The load estimation module is configured to acquire a current reference voltage and an output voltage in the voltage conversion circuit, and determine a load size of the current circuit based on the reference voltage and the output voltage;
斜率配置模块，被配置为根据负载大小配置所述基准电压当前的上升斜率，并控制所述基准电压根据所述上升斜率进行调整，所述负载越小，所配置的上升斜率越大；a slope configuration module configured to configure a current rising slope of the reference voltage according to a load size, and to control the reference voltage to be adjusted according to the rising slope, wherein a smaller the load, a configured rising slope is larger;
控制模块，被配置为当所述基准电压和/或输出电压上升到正常工作电压时，控制所述电压变换电路的软启动结束。The control module is configured to control the soft start of the voltage conversion circuit to end when the reference voltage and/or the output voltage rises to a normal operating voltage.
在本发明的一种实施方式中，所述负载估算模块包括：负载判断子模块，被配置为比较所述基准电压和所述输出电压的大小以确定当前电路的负载大小；或者，设置子模块，被配置为设置至少一个电压阈值，所述电压阈值小于所述基准电压；比较子模块，被配置为比较所述输出电压与所述至少一个电压阈值的大小；负载估算子模块，被配置为根据所述比较子模块的比较结果确定所述负载的大小。In an embodiment of the present invention, the load estimation module includes: a load determination submodule configured to compare the reference voltage and the output voltage to determine a load size of a current circuit; or, set a submodule Configuring to set at least one voltage threshold, the voltage threshold being less than the reference voltage; a comparison sub-module configured to compare the output voltage with a magnitude of the at least one voltage threshold; a load estimation sub-module configured to The size of the load is determined according to a comparison result of the comparison submodule.
在本发明的一种实施方式中，所述设置子模块被配置为设置一个电压阈值，所述电压阈值小于所述基准电压；比较子模块被配置为比较所述输出电压与所述电压阈值的大小；负载估算子模块被配置为当所述输出电压大于所述电压阈值时，确定当前电路的负载较小，当所述输出电压不大于所述电压阈值时，确定当前电路的负载较大。In an embodiment of the invention, the setting sub-module is configured to set a voltage threshold, the voltage threshold is less than the reference voltage; the comparison sub-module is configured to compare the output voltage with the voltage threshold The load estimation submodule is configured to determine that the load of the current circuit is small when the output voltage is greater than the voltage threshold, and determine that the load of the current circuit is greater when the output voltage is not greater than the voltage threshold.
在本发明的一种实施方式中，所述斜率配置模块被配置为在当前的输出电压大于所述电压阈值时，配置所述基准电压当前的上升斜率为第一斜率；在当前的输出电压小于所述电压阈值时，配置所述基准电压当前的上升斜率为第二斜率；所述第一斜率大于所述第二斜率。In an embodiment of the invention, the slope configuration module is configured to configure a current rising slope of the reference voltage to be a first slope when a current output voltage is greater than the voltage threshold; the current output voltage is less than The voltage threshold is configured to configure a current rising slope of the reference voltage to be a second slope; the first slope being greater than the second slope.
在本发明的一种实施方式中，所述斜率配置模块包括：函数建立子模块，被配置为建立输出电压与上升斜率之间的函数关系，所述输出电压越大，所述上升斜率越大；斜率配置子模块，被配置为根据当前采集到的输出电压得到所述基准电压当前的上升斜率。In an embodiment of the invention, the slope configuration module includes a function generation sub-module configured to establish a functional relationship between an output voltage and a rising slope, the larger the output voltage, the larger the rising slope a slope configuration sub-module configured to derive a current rising slope of the reference voltage based on the currently acquired output voltage.
在本发明的一种实施方式中，还包括：判断模块，被配置为判断当前的基准电压是否大于预设电压；所述斜率配置模块还被配置为在所述判断模块的判断结果为是时，配置所述基准电压当前的上升斜率为第三斜率，所述第三斜率比所述基准电压前一时刻的上升斜率小。
In an embodiment of the present invention, the method further includes: a determining module configured to determine whether the current reference voltage is greater than a preset voltage; and the slope configuration module is further configured to: when the determining result of the determining module is yes And configuring a current rising slope of the reference voltage to be a third slope, where the third slope is smaller than a rising slope of a previous moment of the reference voltage.
本发明实施例的有益效果是：The beneficial effects of the embodiments of the present invention are:
本发明实施例提供的电压变换电路的软启动控制方法及装置，通过获取当前电路中的基准电压及输出电压来确定当前电路的负载大小，从而根据该负载大小来配置基准电压的当前上升斜率，并控制基准电压根据当前的上升斜率进行增长，当基准电压和/或输出电压上升到正常工作电压时，软启动结束。通过根据电路中负载的大小来控制基准电压，从而使得与基准电压闭环控制的输出电压也能够根据基准电压的上升规则同步上升，这样，整个电路的输出电压的启动电压过程的波形不会出现差异较大的情况，满足了全负载范围的起机波形单调的需求；且通过调节基准电压上升斜率，可以灵活改变电源的软启动时间，以满足不同应用场景对上升时间的要求。The soft start control method and device for the voltage conversion circuit provided by the embodiment of the present invention determine the load magnitude of the current circuit by acquiring the reference voltage and the output voltage in the current circuit, thereby configuring the current rising slope of the reference voltage according to the load size. And the control reference voltage is increased according to the current rising slope, and the soft start is ended when the reference voltage and/or the output voltage rise to the normal operating voltage. By controlling the reference voltage according to the magnitude of the load in the circuit, the output voltage of the closed-loop control with the reference voltage can also rise synchronously according to the rising rule of the reference voltage, so that the waveform of the starting voltage process of the output voltage of the entire circuit does not differ. The larger case satisfies the monotonic demand of the starting waveform in the full load range; and by adjusting the rising slope of the reference voltage, the soft start time of the power supply can be flexibly changed to meet the rise time requirements of different application scenarios.
附图概述BRIEF abstract
图1本发明实施例一提供的电压变换电路的软启动控制方法的流程示意图；1 is a schematic flow chart of a soft start control method of a voltage conversion circuit according to Embodiment 1 of the present invention;
图2本发明实施例一提供的给定初始基准电压的电压变换电路的软启动控制方法流程示意图；2 is a schematic flow chart of a soft start control method of a voltage conversion circuit for a given initial reference voltage according to Embodiment 1 of the present invention;
图3为本发明实施例一提供的给定初始频率及占空比的电压变换电路的软启动控制方法流程示意图；3 is a schematic flow chart of a soft start control method for a voltage conversion circuit with a given initial frequency and duty ratio according to Embodiment 1 of the present invention;
图4为本发明实施例二提供的电压变换电路的软启动控制装置的结构示意图。4 is a schematic structural diagram of a soft start control device for a voltage conversion circuit according to Embodiment 2 of the present invention.
下面通过实施方式结合附图对本发明进行详细说明。The invention will now be described in detail by way of embodiments with reference to the accompanying drawings.
实施例一：Embodiment 1:
请参考图1所示，本实施例提供的电压变换电路的软启动控制方法包括：Please refer to FIG. 1 , the soft start control method of the voltage conversion circuit provided by this embodiment includes:
S101：获取所述电压变换电路中当前的基准电压及输出电压，基于所述基准电压及输出电压确定当前电路的负载大小；S101: Acquire a current reference voltage and an output voltage in the voltage conversion circuit, and determine a load size of the current circuit based on the reference voltage and the output voltage;
S102：根据负载大小配置所述基准电压当前的上升斜率，并控制所述基准
电压根据所述上升斜率进行调整，所述负载越小，所配置的上升斜率越大；S102: Configure a current rising slope of the reference voltage according to a load size, and control the reference
The voltage is adjusted according to the rising slope, and the smaller the load, the larger the configured rising slope;
S103：当所述基准电压和/或输出电压上升到正常工作电压时，控制所述电压变换电路的软启动结束；在本实施例中，只要保证电路中的输出电压上升到正常工作电压时，即可结束本次软启动。S103: When the reference voltage and/or the output voltage rises to a normal working voltage, control the soft start of the voltage conversion circuit to end; in this embodiment, as long as the output voltage in the circuit rises to a normal working voltage, This soft start can be ended.
需要说明的是，所述电压变换电路包括：直流/直流变换电路；本方案是针对在直流/直流变换电路中，对于其输出的直流电压的软启动的控制过程；所述基准电压与所述输出电压通过一个闭环控制电路相互控制，所述基准电压相当于该闭环控制电路中的输入电压，所述输出电压随着所述基准电压的上升而上升，两者是一种正相关的关系。It should be noted that the voltage conversion circuit includes: a DC/DC conversion circuit; the solution is a control process for a soft start of a DC voltage outputted in the DC/DC conversion circuit; the reference voltage and the reference voltage The output voltage is mutually controlled by a closed loop control circuit corresponding to an input voltage in the closed loop control circuit, the output voltage rising as the reference voltage rises, and the two are in a positive correlation relationship.
针对步骤S101中基于所述基准电压及输出电压确定当前电路的负载大小包括：根据基准电压与输出电压的差值确定当前电路的负载大小，或者，在得到基准电压与输出电压的差值后与对应的偏差电压进行比较，通过判断其与偏差电压的大小来确定当前电路的负载大小，且，可以通过设置多个等级的偏差电压来对应当前负载的大小，如设置两个偏差电压，则此时，负载的大小分为大、中、小三个等级；或者，根据基准电压与输出电压之间的比例关系确定当前电路的负载大小；或者，通过设置至少一个电压阈值与所述输出电压进行比较，然后通过比较结果来确定当前电路的负载大小；总之，其确定负载的大小的方式并不仅仅局限于上述方式，只要满足基准电压与输出电压的差值越大，其负载越大即可。Determining, according to the reference voltage and the output voltage, the load magnitude of the current circuit in step S101 includes: determining a load size of the current circuit according to a difference between the reference voltage and the output voltage, or, after obtaining a difference between the reference voltage and the output voltage, The corresponding deviation voltage is compared, and the load magnitude of the current circuit is determined by determining the magnitude of the deviation voltage, and the deviation voltage of the plurality of levels can be set to correspond to the current load size, for example, two offset voltages are set. The size of the load is divided into three levels: large, medium, and small; or, the load of the current circuit is determined according to a proportional relationship between the reference voltage and the output voltage; or, by setting at least one voltage threshold to compare with the output voltage Then, the comparison result is used to determine the load size of the current circuit; in short, the manner of determining the magnitude of the load is not limited to the above manner, as long as the difference between the reference voltage and the output voltage is larger, the load is larger.
设置一个电压阈值时，可以比较当前的输出电压与所述电压阈值的大小；当所述输出电压大于所述电压阈值时，确定当前电路的负载较小，当所述输出电压不大于所述电压阈值时，确定当前电路的负载较大；此时，对于步骤S102中根据负载大小配置所述基准电压当前的上升斜率包括：在当前的输出电压大于所述电压阈值时，配置所述基准电压当前的上升斜率为第一斜率；在当前的输出电压小于所述电压阈值时，配置所述基准电压当前的上升斜率为第二斜率；所述第一斜率大于所述第二斜率。同样地，可以通过设置两个电压阈值，包括：第一电压阈值和第二电压阈值，所述第一电压阈值大于所述第二电压阈值；比较当前的输出电压与第一电压阈值及第二电压阈值的大小，当输出电压大于第一电压阈值时，确定当前电路的负载较小，在当前输出电压小于第二电压阈值时，确定当前电路的负载较大，在当前输出电压小于第一电压阈值大于第二电
压阈值时，确定当前电路的负载处于较小与较大的中间状态；同理，对于基准电压当前的上升斜率的配置也是根据当前电路负载所处的状态进行配置的；只要满足负载越小，所配置的上升斜率越大即可。When a voltage threshold is set, the current output voltage and the voltage threshold may be compared; when the output voltage is greater than the voltage threshold, determining that the current circuit load is small, when the output voltage is not greater than the voltage At the threshold, determining that the load of the current circuit is large; at this time, configuring the current rising slope of the reference voltage according to the load size in step S102 includes: configuring the reference voltage current when the current output voltage is greater than the voltage threshold The rising slope is a first slope; when the current output voltage is less than the voltage threshold, the current rising slope of the reference voltage is configured as a second slope; the first slope is greater than the second slope. Likewise, by setting two voltage thresholds, including: a first voltage threshold and a second voltage threshold, the first voltage threshold is greater than the second voltage threshold; comparing a current output voltage with a first voltage threshold and a second The magnitude of the voltage threshold is determined when the output voltage is greater than the first voltage threshold, and the load of the current circuit is determined to be small. When the current output voltage is less than the second voltage threshold, the current circuit load is determined to be larger, and the current output voltage is less than the first voltage. The threshold is greater than the second
When the threshold is pressed, it is determined that the load of the current circuit is in a small and large intermediate state; similarly, the configuration of the current rising slope of the reference voltage is also configured according to the state of the current circuit load; as long as the load is smaller, The larger the rising slope is configured.
在步骤S102中，根据负载大小配置所述基准电压当前的上升斜率包括：建立输出电压与上升斜率之间的函数关系，所述输出电压越大，所述上升斜率越大；并根据当前采集到的输出电压得到基准电压当前的上升斜率。在实际应用中，工程人员通过多次试验，建立输出电压与基准电压的上升斜率的函数关系，从而，在进行基准电压的当前的上升斜率的配置的过程中，只要采集到当前的输出电压，即可根据其建立的函数关系得到当前基准电压的上升斜率。In step S102, configuring the current rising slope of the reference voltage according to the load size includes: establishing a function relationship between the output voltage and the rising slope, the larger the output voltage, the larger the rising slope; and according to the current acquisition The output voltage gets the current rising slope of the reference voltage. In practical applications, the engineer establishes a function of the output voltage as a function of the rising slope of the reference voltage through multiple tests, so that as long as the current output voltage is collected during the configuration of the current rising slope of the reference voltage, The rising slope of the current reference voltage can be obtained according to the functional relationship established by it.
在步骤S101获取所述电压变换电路中当前的基准电压及输出电压之前还包括：根据所述电压变换电路的软启动时长及正常工作电压设置初始基准电压；或者，将初始基准电压设置为当前输出电压。Before acquiring the current reference voltage and the output voltage in the voltage conversion circuit in step S101, the method further includes: setting an initial reference voltage according to a soft start duration and a normal working voltage of the voltage conversion circuit; or setting an initial reference voltage to a current output. Voltage.
在步骤S102控制所述基准电压根据所述上升斜率进行调整之后还可以包括：判断当前的基准电压是否大于预设电压，若是，则设置所述基准电压当前的上升斜率为第三斜率，所述第三斜率比所述基准电压前一时刻的上升斜率小。所述预设电压的设置一般是设置成接近正常工作电压，由于在基准电压上升的过程中，在其接近正常工作电压的时候，其负载越来越小，因此，其上升的速度较快，设置一个预设电压来判断基准电压的上升情况，且在其接近正常工作电压的情况下，为了防止输出电压出现由于上升过快，超过正常工作电压的情况，在基准电压大于该预设电压的情况下，重新调整当前的上升斜率为第三斜率，且所述第三斜率小于基准电压前一时刻的上升斜率。这样，输出电压在上升的过程中就可以避免出现需要下降的情况，保证了其起机波形的单调性。After the step S102 is controlled to adjust the reference voltage according to the rising slope, the method further includes: determining whether the current reference voltage is greater than a preset voltage, and if yes, setting a current rising slope of the reference voltage to a third slope, The third slope is smaller than the rising slope of the previous time of the reference voltage. The setting of the preset voltage is generally set to be close to the normal working voltage. Since the load is getting smaller and smaller when the reference voltage rises, when it approaches the normal working voltage, the rising speed is faster. Setting a preset voltage to determine the rise of the reference voltage, and in the case that it is close to the normal operating voltage, in order to prevent the output voltage from appearing too fast, exceeding the normal operating voltage, the reference voltage is greater than the preset voltage. In the case, the current rising slope is re-adjusted to a third slope, and the third slope is smaller than the rising slope of the previous moment of the reference voltage. In this way, the output voltage can be prevented from falling during the rising process, and the monotonicity of the starting waveform is guaranteed.
为了更清楚、准确、完整的描述本发明实施例的技术方案，以12V输出LLC(谐振电路)拓扑为例对本方案进行说明，图2是本发明实施例给定初始基准电压的电压变换电路的软启动控制方法流程示意图，本实施例采用闭环软启动控制策略，当满足开机条件时，电路的软启动步骤如下：In order to describe the technical solution of the embodiment of the present invention more clearly, accurately and completely, the present embodiment is described by taking a 12V output LLC (resonance circuit) topology as an example, and FIG. 2 is a voltage conversion circuit for giving an initial reference voltage according to an embodiment of the present invention. Schematic diagram of the soft start control method flow. In this embodiment, a closed loop soft start control strategy is adopted. When the boot condition is satisfied, the soft start procedure of the circuit is as follows:
S201：给定初始基准电压为2V，通过环路负反馈，输出电压逐渐升高；当负载较轻时，输出电压上升速度较快；当负载较重时，输出电压上升速度较慢；S201: given an initial reference voltage of 2V, the output voltage gradually rises through loop negative feedback; when the load is light, the output voltage rises faster; when the load is heavy, the output voltage rises slowly;
S202：检测当前实际输出电压值，根据检测到的实际输出电压值确定当前负载的大小；在本实施例中，检测当前实际输出电压时延时400us。
S202: Detect a current actual output voltage value, and determine a current load size according to the detected actual output voltage value; in this embodiment, a delay of 400 us when detecting the current actual output voltage.
S203：判断检测到的输出电压值是否大于电压阈值1.5V；若是，则转S204，若否，则转S205；S203: determining whether the detected output voltage value is greater than a voltage threshold of 1.5V; if yes, then proceed to S204, and if not, then proceed to S205;
S204：配置基准电压的当前上升斜率为第一斜率，本实施例中设定基准电压上升斜率为每20us增加0.1V；S204: The current rising slope of the configuration reference voltage is a first slope. In this embodiment, the rising slope of the reference voltage is set to increase by 0.1V per 20us;
S205：配置基准电压的当前上升斜率为第二斜率，本实施例中设定基准电压上升斜率为每20us增加0.05V；S205: The current rising slope of the configuration reference voltage is a second slope. In this embodiment, the rising slope of the reference voltage is set to increase by 0.05V per 20us;
S206：控制基准电压按对应的上升斜率逐渐增大；S206: The control reference voltage is gradually increased according to a corresponding rising slope;
S207：检测当前基准电压是否大于预设电压10V；若是，则转S208，若否，则转S206；S207: detecting whether the current reference voltage is greater than a preset voltage of 10V; if yes, then proceeding to S208, if not, then proceeding to S206;
S208：配置基准电压的当前上升斜率为第三斜率，本实施例中设定基准电压上升斜率为每20us增加0.005V，并控制基准电压按设定斜率逐渐增大；S208: The current rising slope of the configuration reference voltage is a third slope. In this embodiment, the rising slope of the reference voltage is increased by 0.005V per 20 us, and the control reference voltage is gradually increased according to the set slope;
S209：检测基准电压是否大于或等于正常工作电压12V；若是，则转S210，若否，则转S209；S209: detecting whether the reference voltage is greater than or equal to the normal working voltage of 12V; if yes, then going to S210, if not, then going to S209;
S210：设定基准电压为正常工作电压12V，软启动过程结束。S210: The reference voltage is set to a normal working voltage of 12V, and the soft start process ends.
在本实施例中，随着基准电压的逐渐升高，整个回路的输出电压经环路负反馈作用也逐渐升高，实现输出电压的软启动。步骤S204、S205为基准电压自适应负载上升，以避免输出电压产生平台或回沟；步骤S206为基准电压缓慢上升，以避免输出电压产生过冲。通过更改基准电压上升斜率，或者增减基准电压上升斜率分段数，可灵活改变软启动时间及软启动波形，以满足不同应用场景的需求；通过更改步骤S203～S205中电压阈值及基准电压的上升斜率，或者增加步骤S203～S205中阈值及基准电压上升斜率分段数，可适用于宽负载范围及不同LLC环路参数的软启动需求。In this embodiment, as the reference voltage is gradually increased, the output voltage of the entire loop is gradually increased by the loop negative feedback function, and the soft start of the output voltage is realized. Steps S204 and S205 are adaptive voltage increase of the reference voltage to avoid the output voltage generating platform or the trench; in step S206, the reference voltage is slowly increased to avoid overshoot of the output voltage. By changing the slope of the reference voltage rise, or increasing or decreasing the number of segments of the reference voltage rise slope, the soft start time and the soft start waveform can be flexibly changed to meet the requirements of different application scenarios; by changing the voltage threshold and the reference voltage in steps S203 to S205 The rising slope, or increasing the threshold value of the threshold and the reference voltage rising slope in steps S203 to S205, can be applied to a soft load requirement of a wide load range and different LLC loop parameters.
另外，图3是本发明实施例给定初始频率及占空比的电压变换电路的软启动控制方法流程示意图，本实施例采用先开环后闭环的软启动控制策略，当满足开机条件时，软启动步骤如下：In addition, FIG. 3 is a schematic flowchart of a soft start control method for a voltage conversion circuit with an initial frequency and a duty ratio according to an embodiment of the present invention. In this embodiment, a soft start control strategy of a closed loop after a first open loop is adopted, and when the boot condition is satisfied, The soft start steps are as follows:
S301：给定初始开关频率为200K，初始占空比为30％，LLC以固定频率及占空比开环工作，输出电压逐渐升高；S301: given an initial switching frequency of 200K, the initial duty ratio is 30%, the LLC operates at a fixed frequency and a duty cycle, and the output voltage gradually increases;
S302：延时1ms，检测当前实际输出电压值，根据检测到的实际输出电压值确定当前负载的大小；
S302: delay 1ms, detect the current actual output voltage value, and determine the current load size according to the detected actual output voltage value;
S303：设定初始基准电压为当前实际输出电压，LLC切换为闭环电路工作；S303: setting the initial reference voltage to the current actual output voltage, and the LLC switches to the closed loop circuit operation;
S304：判断检测到的输出电压值是否大于电压阈值2V；若是，则转S305，若否，则转S306；所述输出电压大于电压阈值，表示当前负载较轻；所述输出电压小于电压阈值，表示当前负载较重；S304: Determine whether the detected output voltage value is greater than a voltage threshold of 2V; if yes, go to S305, if no, go to S306; the output voltage is greater than the voltage threshold, indicating that the current load is light; the output voltage is less than the voltage threshold, Indicates that the current load is heavy;
S305：设定基准电压当前的上升斜率为第一斜率每20us增加0.1V；S305: setting a current rising slope of the reference voltage to increase the first slope by 0.1V per 20us;
S306：设定基准电压当前的上升斜率为第二斜率每20us增加0.05V；S306: setting a current rising slope of the reference voltage to increase the second slope by 0.05V per 20us;
S307：基准电压按设定的上升斜率逐渐增大；S307: the reference voltage gradually increases according to the set rising slope;
S308：检测基准电压是否大于或等于正常工作电压12V；若是，则转S309；若否，则转S307；S308: detecting whether the reference voltage is greater than or equal to the normal working voltage 12V; if yes, then going to S309; if not, then going to S307;
S309：设定基准电压为正常工作电压12V，软启动过程结束。S309: The reference voltage is set to a normal working voltage of 12V, and the soft start process ends.
同样地，本实施例根据负载的大小来设置基准电压的上升斜率大小，使得输出电压的起机波形单调平缓地上升，更大程度地减少其对电路的影响，延长电路的寿命。Similarly, in this embodiment, the rising slope of the reference voltage is set according to the magnitude of the load, so that the initial waveform of the output voltage rises monotonically and gently, which greatly reduces the influence on the circuit and prolongs the life of the circuit.
实施例二：Embodiment 2:
请参考图4所示，本实施例提供的电压变换电路的软启动控制装置40包括：负载估算模块401、斜率配置模块402和控制模块403；所述负载估算模块401被配置为获取所述电压变换电路中当前的基准电压及输出电压，基于所述基准电压及输出电压确定当前电路的负载大小；所述斜率配置模块402被配置为根据负载大小配置所述基准电压当前的上升斜率，并控制所述基准电压根据所述上升斜率进行调整，所述负载越小，所配置的上升斜率越大；所述控制模块403被配置为当所述基准电压和/或输出电压上升到正常工作电压时，控制所述电压变换电路的软启动结束。本方案通过根据电路中负载的大小来控制基准电压，从而使得与基准电压闭环控制的输出电压也能够根据基准电压的上升规则同步上升，这样，满足了全负载范围的起机波形单调的需求；且通过调节基准电压上升斜率，可以灵活改变电源的软启动时间，以满足不同应用场景对上升时间的要求。Referring to FIG. 4, the soft start control device 40 of the voltage conversion circuit provided in this embodiment includes: a load estimation module 401, a slope configuration module 402, and a control module 403. The load estimation module 401 is configured to acquire the voltage. Determining a current reference voltage and an output voltage in the circuit, determining a load size of the current circuit based on the reference voltage and the output voltage; the slope configuration module 402 is configured to configure a current rising slope of the reference voltage according to a load size, and control The reference voltage is adjusted according to the rising slope, and the smaller the load, the larger the configured rising slope; the control module 403 is configured to when the reference voltage and/or the output voltage rise to a normal operating voltage And controlling the soft start of the voltage conversion circuit to end. The scheme controls the reference voltage according to the magnitude of the load in the circuit, so that the output voltage of the closed-loop control with the reference voltage can also rise synchronously according to the rising rule of the reference voltage, thus satisfying the monotonous requirement of the starting waveform of the full load range; And by adjusting the rising slope of the reference voltage, the soft start time of the power supply can be flexibly changed to meet the rise time requirements of different application scenarios.
所述负载估算模块401可以包括：负载判断子模块，被配置为比较所述基准电压和所述输出电压的大小以确定当前电路的负载大小；或者，设置子模块，被配置为设置至少一个电压阈值，所述电压阈值小于所述基准电压；比较子模
块，被配置为比较所述输出电压与所述至少一个电压阈值的大小；负载估算子模块，被配置为根据所述比较子模块的比较结果确定所述负载的大小；The load estimation module 401 may include: a load determination submodule configured to compare the reference voltage and the magnitude of the output voltage to determine a load size of a current circuit; or, a setting submodule configured to set at least one voltage a threshold, the voltage threshold being less than the reference voltage; comparing submodules
a block configured to compare the output voltage with a magnitude of the at least one voltage threshold; a load estimation sub-module configured to determine a size of the load based on a comparison result of the comparison sub-module;
例如，所述设置子模块被配置为设置一个电压阈值，所述电压阈值小于所述基准电压；比较子模块被配置为比较所述输出电压与所述电压阈值的大小；负载估算子模块被配置为当所述输出电压大于所述电压阈值时，确定当前电路的负载较小，当所述输出电压不大于所述电压阈值时，确定当前电路的负载较大；同理，所述设置子模块也可以通过设置两个电压阈值来对负载进行估算；所述斜率配置模块403被配置为在当前的输出电压大于所述电压阈值时，配置所述基准电压当前的上升斜率为第一斜率；在当前的输出电压小于所述电压阈值时，配置所述基准电压当前的上升斜率为第二斜率；所述第一斜率大于所述第二斜率。For example, the setting sub-module is configured to set a voltage threshold, the voltage threshold being less than the reference voltage; the comparison sub-module is configured to compare the output voltage with the voltage threshold; the load estimation sub-module is configured When the output voltage is greater than the voltage threshold, determining that the load of the current circuit is small, and when the output voltage is not greater than the voltage threshold, determining that the current circuit has a large load; similarly, the setting submodule The load may also be estimated by setting two voltage thresholds; the slope configuration module 403 is configured to configure the current rising slope of the reference voltage to be a first slope when the current output voltage is greater than the voltage threshold; When the current output voltage is less than the voltage threshold, the current rising slope of the reference voltage is configured as a second slope; the first slope is greater than the second slope.
所述斜率配置模块402可以包括：函数建立子模块，被配置为建立输出电压与上升斜率之间的函数关系，所述输出电压越大，所述上升斜率越大；斜率配置子模块，被配置为根据当前采集到的输出电压得到所述基准电压当前的上升斜率。在本实施例中，是通过工程人员在多次的实验中得到其输出电压与上升斜率的关系，从而建立两者之间的函数关系来得到上升斜率的值，使得控制基准电压缓慢上升。The slope configuration module 402 can include a function generation sub-module configured to establish a functional relationship between an output voltage and a rising slope, the larger the output voltage, the greater the rising slope; the slope configuration sub-module configured The current rising slope of the reference voltage is obtained according to the currently collected output voltage. In the present embodiment, the relationship between the output voltage and the rising slope is obtained by the engineer in a plurality of experiments, thereby establishing a functional relationship between the two to obtain a value of the rising slope, so that the control reference voltage is slowly increased.
所述软启动控制装置40还包括：判断模块，被配置为判断当前的基准电压是否大于预设电压；所述斜率配置模块还被配置为在所述判断模块的判断结果为是时，配置所述基准电压当前的上升斜率为第三斜率，所述第三斜率比所述基准电压前一时刻的上升斜率小。所述预设电压的设置一般是设置成接近正常工作电压，由于在基准电压上升的过程中，在其接近正常工作电压的时候，其负载越来越小，因此，其上升的速度越来越快，设置一个预设电压来判断基准电压的上升情况，且在其接近正常工作电压的情况下，为了防止输出电压出现由于上升过快，超过正常工作电压的情况，在基准电压大于该预设电压的情况下，重新调整当前的上升斜率为第三斜率，且所述第三斜率小于基准电压前一时刻的上升斜率。这样，输出电压在上升的过程中就可以避免出现下降的情况，保证了其起机波形的单调性。The soft start control device 40 further includes: a determining module configured to determine whether the current reference voltage is greater than a preset voltage; the slope configuration module is further configured to: when the determination result of the determining module is yes, the configuration The current rising slope of the reference voltage is a third slope, and the third slope is smaller than a rising slope of the previous moment of the reference voltage. The setting of the preset voltage is generally set to be close to the normal working voltage. Since the load is getting smaller and smaller when the reference voltage rises, when it approaches the normal working voltage, the rising speed is more and more Fast, set a preset voltage to judge the rise of the reference voltage, and in the case that it is close to the normal working voltage, in order to prevent the output voltage from appearing too fast, exceeding the normal working voltage, the reference voltage is greater than the preset In the case of voltage, the current rising slope is readjusted to a third slope, and the third slope is less than the rising slope of the previous moment of the reference voltage. In this way, the output voltage can be prevented from falling during the rising process, and the monotonicity of the starting waveform is guaranteed.
本发明实施例通过获取当前电路中的基准电压及输出电压来确定当前电路的负载大小，从而根据该负载大小来配置基准电压的当前上升斜率，并控制基
准电压根据当前的上升斜率进行增长，当基准电压和/或输出电压上升到正常工作电压时，软启动结束。通过根据电路中负载的大小来控制基准电压，从而使得与基准电压闭环控制的输出电压也能够根据基准电压的上升规则同步上升，这样，整个电路的输出电压的启动电压过程的波形不会出现差异较大的情况，满足了全负载范围的起机波形单调的需求；且通过调节基准电压上升斜率，可以灵活改变电源的软启动时间，以满足不同应用场景对上升时间的要求。In the embodiment of the present invention, the load voltage of the current circuit is determined by acquiring the reference voltage and the output voltage in the current circuit, thereby configuring the current rising slope of the reference voltage according to the load size, and controlling the base.
The quasi-voltage increases according to the current rising slope, and the soft start ends when the reference voltage and/or output voltage rises to the normal operating voltage. By controlling the reference voltage according to the magnitude of the load in the circuit, the output voltage of the closed-loop control with the reference voltage can also rise synchronously according to the rising rule of the reference voltage, so that the waveform of the starting voltage process of the output voltage of the entire circuit does not differ. The larger case satisfies the monotonic demand of the starting waveform in the full load range; and by adjusting the rising slope of the reference voltage, the soft start time of the power supply can be flexibly changed to meet the rise time requirements of different application scenarios.
以上所述，仅为本发明实施例而已，并非用于限定本发明的保护范围，凡对本发明实施例所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above is only the embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalents, and improvements made to the embodiments of the present invention are included in the scope of the present invention.
本申请提供的电压变换电路的软启动控制方法及装置中，所述电压变换电路的软启动控制方法包括：获取所述电压变换电路中当前的基准电压及输出电压，基于所述基准电压及输出电压确定当前电路的负载大小；根据负载大小配置所述基准电压当前的上升斜率，并控制所述基准电压根据所述上升斜率进行调整，所述负载越小，所配置的上升斜率越大；当所述基准电压和/或输出电压上升到正常工作电压时，控制所述电压变换电路的软启动结束。解决了相关技术中由于基准电压上升斜率设置与电路中的负载不匹配而导致的起机波形出现平台或回钩的问题，满足了全负载范围的起机波形单调的需求。
In the soft start control method and apparatus of the voltage conversion circuit provided by the present application, the soft start control method of the voltage conversion circuit includes: acquiring a current reference voltage and an output voltage in the voltage conversion circuit, based on the reference voltage and output The voltage determines a load size of the current circuit; the current rising slope of the reference voltage is configured according to the load size, and the reference voltage is controlled to be adjusted according to the rising slope, and the smaller the load, the larger the configured rising slope; When the reference voltage and/or the output voltage rises to a normal operating voltage, the soft start of the voltage conversion circuit is controlled to end. The problem of the platform or the hook of the initial waveform caused by the mismatch between the reference voltage rising slope setting and the load in the circuit is solved in the related art, and the monotonous demand of the starting waveform in the full load range is satisfied.
Claims (13)
- 一种电压变换电路的软启动控制方法，包括：A soft start control method for a voltage conversion circuit, comprising:获取所述电压变换电路中当前的基准电压及输出电压，基于所述基准电压及输出电压确定当前电路的负载大小；Obtaining a current reference voltage and an output voltage in the voltage conversion circuit, and determining a load size of the current circuit based on the reference voltage and the output voltage;根据负载大小配置所述基准电压当前的上升斜率，并控制所述基准电压根据所述上升斜率进行调整；其中所述负载越小，所配置的上升斜率越大；Configuring a current rising slope of the reference voltage according to a load size, and controlling the reference voltage to be adjusted according to the rising slope; wherein the smaller the load, the configured rising slope is larger;当所述基准电压和/或输出电压上升到正常工作电压时，控制所述电压变换电路的软启动结束。When the reference voltage and/or the output voltage rises to a normal operating voltage, the soft start of the voltage conversion circuit is controlled to end.
- 如权利要求1所述的方法，其中，基于所述基准电压及输出电压确定当前电路的负载大小包括：比较当前的基准电压和输出电压的大小以确定当前电路的负载大小；或者，设置至少一个电压阈值，其中所述电压阈值小于所述基准电压；比较所述输出电压与所述至少一个电压阈值的大小；根据所述输出电压与所述电压阈值的大小确定当前电路的负载大小。The method of claim 1, wherein determining a load size of the current circuit based on the reference voltage and the output voltage comprises: comparing a current reference voltage and a magnitude of the output voltage to determine a load size of the current circuit; or, setting at least one a voltage threshold, wherein the voltage threshold is less than the reference voltage; comparing a magnitude of the output voltage to the at least one voltage threshold; determining a load magnitude of a current circuit based on the magnitude of the output voltage and the voltage threshold.
- 如权利要求2所述的方法，其中，设置一个电压阈值时，比较当前的输出电压与所述电压阈值的大小；当所述输出电压大于所述电压阈值时，确定当前电路的负载较小，当所述输出电压不大于所述电压阈值时，确定当前电路的负载较大。The method according to claim 2, wherein when a voltage threshold is set, a current output voltage is compared with a magnitude of the voltage threshold; and when the output voltage is greater than the voltage threshold, determining that a current circuit load is small, When the output voltage is not greater than the voltage threshold, it is determined that the load of the current circuit is large.
- 如权利要求3所述的方法，其中，根据负载大小配置所述基准电压当前的上升斜率包括：在当前的输出电压大于所述电压阈值时，配置所述基准电压当前的上升斜率为第一斜率；在当前的输出电压小于所述电压阈值时，配置所述基准电压当前的上升斜率为第二斜率；其中所述第一斜率大于所述第二斜率。The method of claim 3, wherein configuring the current rising slope of the reference voltage according to a load size comprises: configuring a current rising slope of the reference voltage to be a first slope when a current output voltage is greater than the voltage threshold And configuring, when the current output voltage is less than the voltage threshold, a current rising slope of the reference voltage to be a second slope; wherein the first slope is greater than the second slope.
- 如权利要求1所述的方法，其中，根据负载大小配置所述基准电压当前的上升斜率包括：建立输出电压与上升斜率之间的函数关系，其中所述输出电 压越大，所述上升斜率越大；根据当前采集到的输出电压得到基准电压当前的上升斜率。The method of claim 1 wherein configuring the current rising slope of the reference voltage in accordance with a load size comprises establishing a functional relationship between an output voltage and a rising slope, wherein the output power The larger the pressure, the larger the rising slope; the current rising slope of the reference voltage is obtained according to the currently collected output voltage.
- 如权利要求1所述的方法，其中，获取所述电压变换电路中当前的基准电压及输出电压之前还包括：根据所述电压变换电路的软启动时长及正常工作电压设置初始基准电压；或者，将初始基准电压设置为当前输出电压。The method of claim 1, wherein the obtaining the current reference voltage and the output voltage in the voltage conversion circuit further comprises: setting an initial reference voltage according to a soft start duration and a normal operating voltage of the voltage conversion circuit; or Set the initial reference voltage to the current output voltage.
- 如权利要求1-6任一项所述的方法，其中，控制所述基准电压根据所述上升斜率进行调整之后还包括：判断当前的基准电压是否大于预设电压，若是，则设置所述基准电压当前的上升斜率为第三斜率，其中所述第三斜率比所述基准电压前一时刻的上升斜率小。The method according to any one of claims 1 to 6, wherein controlling the reference voltage to be adjusted according to the rising slope further comprises: determining whether the current reference voltage is greater than a preset voltage, and if so, setting the reference The current rising slope of the voltage is a third slope, wherein the third slope is smaller than the rising slope of the previous moment of the reference voltage.
- 一种电压变换电路的软启动控制装置，包括：A soft start control device for a voltage conversion circuit, comprising:负载估算模块，被配置为获取所述电压变换电路中当前的基准电压及输出电压，基于所述基准电压及输出电压确定当前电路的负载大小；The load estimation module is configured to acquire a current reference voltage and an output voltage in the voltage conversion circuit, and determine a load size of the current circuit based on the reference voltage and the output voltage;斜率配置模块，被配置为根据负载大小配置所述基准电压当前的上升斜率，并控制所述基准电压根据所述上升斜率进行调整；其中所述负载越小，所配置的上升斜率越大；a slope configuration module configured to configure a current rising slope of the reference voltage according to a load size, and to control the reference voltage to be adjusted according to the rising slope; wherein a smaller the load, a configured rising slope is larger;控制模块，被配置为当所述基准电压和/或输出电压上升到正常工作电压时，控制所述电压变换电路的软启动结束。The control module is configured to control the soft start of the voltage conversion circuit to end when the reference voltage and/or the output voltage rises to a normal operating voltage.
- 如权利要求8所述的装置，其中，所述负载估算模块包括：负载判断子模块，被配置为比较所述基准电压和所述输出电压的大小以确定当前电路的负载大小；或者，设置子模块，被配置为设置至少一个电压阈值，其中所述电压阈值小于所述基准电压；比较子模块，被配置为比较所述输出电压与所述至少一个电压阈值的大小；负载估算子模块，被配置为根据所述比较子模块的比较结果确定所述负载的大小。 The apparatus of claim 8, wherein the load estimating module comprises: a load determining submodule configured to compare the magnitude of the reference voltage and the output voltage to determine a load size of a current circuit; or, a setting sub a module configured to set at least one voltage threshold, wherein the voltage threshold is less than the reference voltage; a comparison sub-module configured to compare a magnitude of the output voltage to the at least one voltage threshold; a load estimation sub-module It is configured to determine the size of the load according to a comparison result of the comparison submodule.
- 如权利要求9所述的装置，其中，所述设置子模块被配置为设置一个电压阈值，其中所述电压阈值小于所述基准电压；比较子模块被配置为比较所述输出电压与所述电压阈值的大小；负载估算子模块被配置为当所述输出电压大于所述电压阈值时，确定当前电路的负载较小，当所述输出电压不大于所述电压阈值时，确定当前电路的负载较大。The apparatus of claim 9, wherein the setting sub-module is configured to set a voltage threshold, wherein the voltage threshold is less than the reference voltage; the comparison sub-module is configured to compare the output voltage to the voltage a size of the threshold; the load estimation submodule is configured to determine that the load of the current circuit is small when the output voltage is greater than the voltage threshold, and determine a load of the current circuit when the output voltage is not greater than the voltage threshold Big.
- 如权利要求10所述的装置，其中，所述斜率配置模块被配置为在当前的输出电压大于所述电压阈值时，配置所述基准电压当前的上升斜率为第一斜率；在当前的输出电压小于所述电压阈值时，配置所述基准电压当前的上升斜率为第二斜率；其中所述第一斜率大于所述第二斜率。The apparatus of claim 10, wherein the slope configuration module is configured to configure a current rising slope of the reference voltage to be a first slope when a current output voltage is greater than the voltage threshold; at a current output voltage When the voltage threshold is less than the voltage threshold, the current rising slope of the reference voltage is configured as a second slope; wherein the first slope is greater than the second slope.
- 如权利要求8所述的装置，其中，所述斜率配置模块包括：函数建立子模块，被配置为建立输出电压与上升斜率之间的函数关系，其中所述输出电压越大，所述上升斜率越大；斜率配置子模块，被配置为根据当前采集到的输出电压得到所述基准电压当前的上升斜率。The apparatus of claim 8 wherein said slope configuration module comprises: a function generation sub-module configured to establish a functional relationship between an output voltage and a rising slope, wherein said increasing voltage is greater, said rising slope The larger the slope configuration sub-module, configured to obtain the current rising slope of the reference voltage based on the currently acquired output voltage.
- 如权利要求8-12任一项所述的装置，其中，还包括：判断模块，被配置为判断当前的基准电压是否大于预设电压；所述斜率配置模块还被配置为在所述判断模块的判断结果为是时，配置所述基准电压当前的上升斜率为第三斜率，其中所述第三斜率比所述基准电压前一时刻的上升斜率小。 The apparatus according to any one of claims 8 to 12, further comprising: a determining module configured to determine whether the current reference voltage is greater than a preset voltage; the slope configuration module is further configured to be in the determining module When the determination result is YES, the current rising slope of the reference voltage is configured as a third slope, wherein the third slope is smaller than a rising slope of the previous moment of the reference voltage.
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| CN101312327A (en) * | 2007-05-23 | 2008-11-26 | 松下电器产业株式会社 | Power supply |
| WO2012094483A2 (en) * | 2011-01-07 | 2012-07-12 | Ysi Incorporated | Power coupling system and method |
| CN103441658A (en) * | 2013-08-30 | 2013-12-11 | 深圳市汇顶科技股份有限公司 | Boost controller and Boost converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787506A (en) * | 2019-11-08 | 2021-05-11 | 万国半导体国际有限合伙公司 | Voltage modulator with piecewise linear load line |
| CN118554773A (en) * | 2024-07-30 | 2024-08-27 | 西安图为电气技术有限公司 | Soft start control method of bidirectional LLC resonant converter and storage medium |
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| CN106329904A (en) | 2017-01-11 |
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