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Switching converter and its control method and controller

A switching converter and control method technology, applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve the problems of uneven output voltage establishment, influence of power supply system, etc., to achieve smooth output voltage, Reduce the effect of falling

Active Publication Date: 2020-03-06
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will cause the problem that the output voltage drops first and then rises during the soft start phase, resulting in an uneven establishment of the output voltage, which may have a serious impact on the power supply system of the subsequent stage.

Method used

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  • Switching converter and its control method and controller
  • Switching converter and its control method and controller
  • Switching converter and its control method and controller

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Embodiment Construction

[0043] The present application is described below based on examples, but the present application is not limited only to these examples. In the following detailed description of the application, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. To avoid obscuring the essence of the present application, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0044] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0045] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" anoth...

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Abstract

The invention relates to a switching converter, a control method thereof and a controller. According to the technical schemes of the present invention, the switching converter is controlled to switched from an inductive current interrupted mode in which the switching converter operates during a soft start process to an inductive current continuous mode after the soft start is completed and a firstpower tube is turned on for the first time, and therefore, the drop of an output voltage can be decreased, and therefore, the output voltage is smoother during the soft start.

Description

technical field [0001] The present invention relates to power electronic technology, in particular to a switching converter and its control method and controller. Background technique [0002] The inductor current continuous mode refers to the mode in which the power tube of the switching converter is continuously turned on and off alternately, so that the inductor current changes continuously. In the prior art, in order to reduce the output voltage ripple, when the output load is very small, it is also forced to work in the inductor current continuous mode (that is, the forced inductor current continuous mode FCCM), so that the switching converter The switching frequency remains the same under heavy load conditions. This makes the controller also control the switching converter to work in the forced inductor current continuous mode during the soft-start phase. This will cause the problem that the output voltage drops first and then rises during the soft start phase, resul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/36H02M3/158
CPCH02M1/36H02M3/158
Inventor 李国旺
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD