Method and device for controlling voltage ripples of three-level circuit, and electronic equipment

A technology of circuit voltage and control method, applied in the field of converters, can solve the problems of inability to achieve load current tracking capability, large voltage, ripple, etc.

Active Publication Date: 2022-07-22
绍兴圆方半导体有限公司
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Problems solved by technology

[0003] However, when the three-level circuit operates under a higher-frequency AC load, it may not be able to achieve the ideal load current tracking capability, so that large voltage ripples may occur during the process of adjusting the voltage input to the three-level circuit. Affect the normal use of the equipment

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  • Method and device for controlling voltage ripples of three-level circuit, and electronic equipment
  • Method and device for controlling voltage ripples of three-level circuit, and electronic equipment
  • Method and device for controlling voltage ripples of three-level circuit, and electronic equipment

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Embodiment Construction

[0022] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can appreciate that, in the various embodiments of the present invention, many technical details are set forth in order for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be realized.

[0023] In the description of the present invention, it is to be understood that the terms "comprising" and "having" as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process comprising a series of steps or units, A method, system, product or device is not ...

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Abstract

The invention relates to the technical field of converters, and discloses a three-level circuit voltage ripple control method and device, and electronic equipment. The method comprises the following steps: detecting whether an inductive current flowing through an inductor in a three-level circuit needs to be adjusted or not; when it is detected that reduction is needed, if the circuit is in a boost or buck-boost mode, a second time period is inserted in a first time period in which each power unit runs in a first state, and the power unit is switched to run in a second state in the second time period; if the power unit is in the boost mode, the inductive current drops when the power unit operates in the first state; when the power unit needs to be boosted, if the circuit is in a voltage reduction or voltage boosting and reducing mode, inserting a third time period in the first time period, and switching the power unit to a third state for operation in the third time period; wherein, if the circuit is in the step-down mode, the inductive current rises when the power unit operates in the first state. The inductive current can quickly track the load current, so that the output voltage ripple of the three-level circuit is reduced.

Description

technical field [0001] The present invention relates to the technical field of converters, in particular to a method, device and electronic equipment for controlling voltage ripple of a three-level circuit. Background technique [0002] The three-level circuit can work in buck mode (Buck), buck-boost mode (Buck-Boost) and boost mode (Boost). It can flexibly output a voltage higher or lower than the input voltage through mode switching to meet the needs of subsequent circuit units in the device. At present, three-level circuits have been used more and more in mobile phones and other devices due to their excellent performance. [0003] However, when a three-level circuit operates under a higher frequency AC load, the ideal load current tracking capability may not be achieved, and a large voltage ripple may be generated in the process of adjusting the voltage input to the three-level circuit. Affect the normal use of the device. SUMMARY OF THE INVENTION [0004] The purpos...

Claims

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Application Information

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IPC IPC(8): H02M1/14H02M7/483
CPCH02M1/14H02M7/483Y02B70/10
Inventor 李建民许超宋海艳
Owner 绍兴圆方半导体有限公司
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