LLC Resonant Converter With Adaptive Link-Voltage Variation for a High-Power-Density Adapter

Author

Kim, Bong-Chul ; Park, Ki-Bum ; Kim, Chong-Eun ; Lee, Byoung-Hee ; Moon, Gun-Woo

Author_Institution

Div. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

25

Issue

9

fYear

2010

Firstpage

2248

Lastpage

2252

Abstract

The output voltage of an adapter for a laptop computer should vary according to the load current in order to supply power to the computer. To satisfy this requirement, an LLC resonant converter with an adaptive link-voltage-variation (ALVV) scheme is proposed in this letter. The proposed ALVV scheme helps the LLC resonant converter to operate at a nearly constant resonant frequency and also allows for the optimal design of the converter. High power density and high efficiency can therefore be obtained. The proposed LLC resonant converter with the ALVV scheme is analyzed theoretically and verified experimentally.

Keywords

laptop computers; power supplies to apparatus; resonant power convertors; LLC resonant converter; adaptive link-voltage variation; high power density; high-power-density adapter; optimal design; DC-DC power converters; Inductors; Portable computers; Power engineering computing; Power supplies; Power system harmonics; Resonance; Resonant frequency; Switching frequency; Voltage; Adaptive link-voltage variation (ALVV); LLC resonant converter; high power density; resonant-frequency operation;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2010.2050906

Filename

5467186