Analysis for LLC resonant converter considering parasitic components at very light load condition

2011 ◽  
Author(s):  
Jae-Hyun Kim ◽  
Chong-Eun Kim ◽  
Jae-Kuk Kim ◽  
Gun-Woo Moon
Keyword(s):  
Load Condition ◽  
Resonant Converter ◽  
Light Load ◽  
Llc Resonant Converter ◽  
Parasitic Components

scholarly journals The Influence of Parasitic Components on LLC Resonant Converter

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4305 ◽  
Author(s):  
Fang Li ◽  
Ruixiang Hao ◽  
Haodong Lei ◽  
Xinyi Zhang ◽  
Xiaojie You
Keyword(s):  
Load Condition ◽  
Equation Model ◽  
Soft Switching ◽  
Resonant Converter ◽  
Practical Applications ◽  
Conduction Loss ◽  
Light Load ◽  
Llc Resonant Converter ◽  
Simulation Results ◽  
Parasitic Components

In recent years, the LLC resonant converter has been widely used in DC–DC conversion applications. However, the parasitic components of the LLC resonant converter have a significant impact in practical applications, such as influence on the conduction loss and the soft-switching of power devices, the voltage oscillation across rectifier diodes, the unregulated output voltage at light load condition and so on. It is hard to analyze the higher-order circuits by the conventional analysis methods. Focusing on the operational principle of the LLC converter with parasitic components, the differential equation model is presented and solved by the numerical method in this paper. The simulation results verify the correctness of the theoretical analysis. The causes of two different frequency oscillations and the voltage spike are clarified. The design considerations and a specific example of the LLC converter are given. The experimental results are consistent with the simulation results, and the soft-switching of primary-side switches can be achieved in the prototype.

Energy Feedback Control of Light-Load Voltage Regulation for LLC Resonant Converter

2019 ◽  
Vol 34 (5) ◽  
pp. 4807-4819 ◽  
Author(s):  
Zhijian Fang ◽  
Junhua Wang ◽  
Rong Liu ◽  
Liangle Xiao ◽  
Junkun Zhang ◽  
...  
Keyword(s):  
Feedback Control ◽  
Voltage Regulation ◽  
Resonant Converter ◽  
Load Voltage ◽  
Energy Feedback ◽  
Light Load ◽  
Llc Resonant Converter

Erratum to “Hold-Up Time Compensation Circuit of Half-Bridge LLC Resonant Converter for High Light-Load Efficiency”

2021 ◽  
Vol 36 (2) ◽  
pp. 2446-2446
Author(s):  
Yeonho Jeong ◽  
Min-Su Lee ◽  
Jae-Do Park ◽  
Jae-Kuk Kim ◽  
Ronald A. L. Rorrer
Keyword(s):  
High Light ◽  
Resonant Converter ◽  
Compensation Circuit ◽  
Light Load ◽  
Llc Resonant Converter
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