Control circuit, switching converter and control method thereof

A technology of switching converters and control circuits, which is applied in the direction of high-efficiency power electronic conversion, conversion equipment without intermediate conversion to AC, conversion of DC power input into DC power output, etc., can solve problems such as unfavorable efficiency, and achieve improved efficiency, The effect of increasing the switching frequency and increasing the on-time

Active Publication Date: 2013-01-23
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under light load conditions, driving loss and switching loss become the dominant factors affecting efficiency, so a higher switching frequency Fsw is not conducive to improving efficiency under light load conditions

Method used

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  • Control circuit, switching converter and control method thereof
  • Control circuit, switching converter and control method thereof
  • Control circuit, switching converter and control method thereof

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Embodiment Construction

[0026] Specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described here are only used for illustration and are not used to limit the present invention. In the following description, in order to provide a thorough understanding of the present invention, numerous specific details are set forth. However, it is obvious to a person of ordinary skill in the art that it is not necessary to adopt these specific details to implement the present invention. In other instances, in order to avoid obscuring the present invention, well-known circuits, materials or methods are not specifically described.

[0027] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "example" mean that a specific feature, structure, or characteristic described in conjunction with the embodiment or example is included in the present invention In at least one embodiment. Therefore, the phrases "in one...

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Abstract

The invention discloses a control circuit, a switching converter and a control method thereof. The switching converter comprises a first switching tube; the control circuit controls the on-off of the first switching tube; when a control signal in a power-saving mode is in an effective state, the switching converter is switched to work in the power-saving mode, and the on time of the first switching tube is increased; and therefore, the efficiency of the switching converter in the power-saving mode is improved.

Description

Technical field [0001] The present invention mainly relates to an electronic circuit, in particular to a control circuit for a switching converter and a control method thereof. Background technique [0002] With the development of electronic technology, electronic devices such as mobile phones, personal digital assistants (PDAs), tablet computers, netbooks, and ultrabooks have rapidly become popular. Ultrabooks, mobile phones and similar electronic devices need to have the function of always on and always connected (AOAC), that is, the standby function. Extending as much as possible the time that the electronic device can maintain in the AOAC mode, or prolonging the standby time of the electronic device as much as possible, has become one of the important indicators for designing electronic devices. The power of electronic equipment in AOAC or standby mode is small and in a light-load state. Therefore, the efficiency of electric energy usage at light load is very important. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/10H02M7/12
CPCY02B70/16H02M3/158H02M1/0032Y02B70/10
Inventor 欧阳茜
Owner CHENGDU MONOLITHIC POWER SYST
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