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Mode control method of switching converter and switching converter

A switching converter and mode control technology, applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve the problems of large no-load loss, inability to take into account the efficiency of wide input voltage range, etc., to achieve low The effect of excellent loss and system efficiency

Active Publication Date: 2021-03-26
MORNSUN GUANGZHOU SCI & TECH
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Problems solved by technology

[0012] In view of this, the present invention proposes a mode switching method of a switching converter, which can effectively solve the problem that the existing mode switching method cannot take into account the problem of better efficiency in a wide input voltage range and the problem of large no-load loss

Method used

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  • Mode control method of switching converter and switching converter
  • Mode control method of switching converter and switching converter
  • Mode control method of switching converter and switching converter

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Embodiment Construction

[0059] In order to make the present invention clearer, the prior art solutions and the technical solutions of the present invention will be described more clearly and completely below in conjunction with the drawings and specific embodiments.

[0060] Please refer to Image 6 , a switching converter, comprising: an asymmetrical half-bridge flyback converter and a controller.

[0061] The asymmetrical half-bridge flyback converter (hereinafter referred to as the converter) includes an input capacitor Cin, a main switch S1, an auxiliary switch S2, a resonant capacitor Cr, a unidirectional clamp network, a transformer, a rectifier switch D, and an output filter capacitor Co , an output voltage isolation sampling module and an input voltage sampling module.

[0062] The output voltage isolation sampling module is a load sampling module. The output voltage isolation sampling module is provided with two input terminals and one output terminal. The two input terminals are respective...

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Abstract

The invention relates to the field of design of switching converters, and discloses a mode control method of an asymmetric half-bridge flyback converter. According to the invention, the working mode of the asymmetric half-bridge flyback converter is controlled by collecting the input voltage and the load information, so that the problems that the efficiency in a wide input voltage range cannot bebetter and the no-load loss is larger in the existing mode control scheme which only adopts the load current are effectively solved; therefore, the asymmetric half-bridge flyback converter has excellent efficiency in a full-voltage and full-load range.

Description

technical field [0001] The invention relates to the field of switch converter design, in particular to a mode control method of the switch converter and the switch converter. Background technique [0002] Switching converter, also known as switching power supply, is a power supply device that realizes power conversion and transmission by controlling the switching on and off of semiconductor switching devices. Compared with traditional power supplies, it has many advantages such as high efficiency, small size, and light weight. It is widely used in consumer electronics, New energy, industrial control, aerospace and other fields. In recent years, with the strengthening of awareness of environmental protection and energy saving worldwide and the development of power electronics technology, the energy efficiency indicators of switching converter products have gradually improved. Some applications require not only high efficiency at rated operating points, but also wide input vol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/3353Y02B70/10
Inventor 王启羽杜波江波
Owner MORNSUN GUANGZHOU SCI & TECH
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