Flyback converter

A converter and flyback technology, applied in the field of power conversion, can solve problems such as low conversion efficiency and high switching loss, and achieve the effect of high conversion efficiency and low switching loss

Inactive Publication Date: 2017-03-08
LITE ON ELECTRONICS (GUANGZHOU) LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the past, the flyback converter disadvantageously has relatively hig

Method used

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Examples

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Example Embodiment

[0038] see Figure 1 to Figure 3 , an embodiment of the flyback converter of the present invention is suitable for converting an input voltage Vi into an output voltage Vo, and the flyback converter includes a transformer 1 , a first switch 2 , and a first control module 3 , a second switch 4 , an output capacitor 5 and a second control module 6 .

[0039] The transformer 1 includes a primary winding 11 , a secondary winding 12 and an auxiliary winding 13 . Each of the primary, secondary and auxiliary windings 11, 12, 13 has a first end (eg, figure 1 shown as a dotted end with black dots) and a second end (for example, figure 1 shown as a non-dotted end without black dots). The first terminals of the primary, secondary and auxiliary windings 11, 12, 13 have the same voltage polarity. The number of turns of the primary winding 11 is N times that of the secondary winding 12 (ie, a turns ratio of the primary winding 11 to the secondary winding 12 is N), and the primary windin...

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PUM

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Abstract

A flyback converter includes: a transformer including a primary winding and a secondary winding; a first switch coupled to the primary winding; a first control module configured to control the first switch; a second switch coupled to the secondary winding; and a second control module configured to control the second switch, such that the second switch operates in an ON state during a first time period and during a second time period which follows the first time period, and such that a current flowing through the secondary winding has a direction during the second time period opposite to that during the first time period.

Description

technical field [0001] The invention relates to a power conversion, in particular to a flyback converter. Background technique [0002] In the past, the flyback converter disadvantageously has relatively high switching losses, resulting in relatively low conversion efficiency. Therefore, there is still room for improvement in the round-trip converter in the future. Contents of the invention [0003] A first object of the present invention is to provide a flyback converter with relatively low switching loss and relatively high conversion efficiency. [0004] The flyback converter of the present invention includes a transformer, a first switch, a first control module, a second switch and a second control module. [0005] The transformer includes a primary winding and a secondary winding, each of the primary and secondary windings has a first end and a second end, the first ends of the primary and secondary windings have the same the voltage polarity. [0006] The first s...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33523H02M3/33576H02M1/0048Y02B70/10H02M1/0054
Inventor 林成泰许圢墿林正宏谢明琮罗有纲
Owner LITE ON ELECTRONICS (GUANGZHOU) LTD
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