Quasi resonant push-pull converter and control method thereof

Active Publication Date: 2014-01-23
LIAN ZHENG ELECTRONICS (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0021]Preferentially, the method further comprises: predetermining a certain voltage value and setting both of the first switch and the second switch to be opened when the DC input v

Problems solved by technology

However, while switching frequency is improved, switching losses will be increased and the problems of inductive turn-off, capacitive turn-on and diodes reverse recovery will be aggravated, which will give rise to reduction of circuit efficiency and inc

Method used

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  • Quasi resonant push-pull converter and control method thereof
  • Quasi resonant push-pull converter and control method thereof
  • Quasi resonant push-pull converter and control method thereof

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Embodiment Construction

[0028]The exemplary embodiments are introduced now by referring to drawings of the invention. However, the invention can be embodied in many different ways and is not limited to the embodiments described here. Providing those embodiments is to completely disclose the invention in detail and fully express the scope of the invention to those skilled in the art. The terminologies used in the exemplary embodiments of the drawings are not definitions to the invention. In the drawings, identical reference sign is used for identical unit / element.

[0029]Unless otherwise stated, the “one”, “a”, “said” and “the” also refer to plural forms. Furthermore, it should be understood that the terminologies “comprise”, “include” and / or “contain” in the description designate some features, objects, procedures, operations, units and / or elements, but not exclude one or more features, objects, procedures, operations, units and / or elements and / or groups composed of them. It should be known that when

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Abstract

The invention relates to a quasi-resonant push-pull converter and the method for controlling the same, said push-pull converter comprising: a direct current (DC) input power supply configured to supply DC input for the converter; a first power input unit and a second power input unit, connected to said DC input power supply, respectively and configured to supply input for the converter in different periods, comprising a first power switching tube and a second power switching tube, a first primary winding and a second primary winding; a power output circuit, configured to supply output of the converter, comprising secondary windings and full-bridge rectification circuits; a first output capacitor and a second output capacitor connected to said power output circuit and configured to store DC electric energy output by the power output circuit in which a resonant element is arranged to achieve a quasi-resonant switching circuit through voltage feedback; and a switching circuit being controlled through voltage feedback, whereby turns ratio of the primary windings and the secondary windings of the push-pull converter is controlled.

Description

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Claims

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Application Information

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Owner LIAN ZHENG ELECTRONICS (SHENZHEN) CO LTD
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