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- W4288391350 abstract "In high-load-current <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>LLC</i> dc–dc converter, synchronous rectification (SR) is usually used to reduce the secondary loss. As a lossless, low-cost, and small-volume SR control strategy, the drain–source voltage of SR switches sensing method is used widely in industrial applications. However, when the load current increases, the voltage ringing across SR switches during O stage is more and more severe and reaches zero eventually. When the voltage ringing reaches around zero in <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>LLC</i> converter, the voltage-sensing-method SR controller will generate the false driving signal, which makes SR switches turn <sc xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>on</small> early and causes the converter works abnormally. This article presents the accurate analysis and design of the circuit parameters of <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>LLC</i> dc–dc converter to prevent the voltage ringing across the SR switches reaches around zero. The voltage ringing model is established, and the parameters design principle is given. By using the proposed design guideline, the voltage ringing across SR switches will always be higher than zero over the full load range, which eliminates the turn- <sc xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>on</small> early issue or turn- <sc xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>on</small> several times in one cycle issue. Therefore, this article can provide a design reference and guideline for the high-load-current and high-output-power <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>LLC</i> converter with voltage sensing SR control strategy. A 2.16 kW SR <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>LLC</i> dc–dc converter prototype is built according to the proposed design guideline, and the experimental results verify the correctness and effectiveness of the analysis." @default.
- W4288391350 created "2022-07-29" @default.
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- W4288391350 date "2022-12-01" @default.
- W4288391350 modified "2023-10-18" @default.
- W4288391350 title "Accurate Analysis and Design of the Circuit Parameters of <i>LLC</i> DC–DC Converter With Synchronous Rectification" @default.
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- W4288391350 doi "https://doi.org/10.1109/tpel.2022.3194588" @default.
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