Low-profile AC/DC converter for laptop adaptor

Author

Baek, Jong-bok ; Kim, Ji-Tae ; Cho, Bo-Hyung

Author_Institution

Dept. of Electr. Eng., Seoul Nat. Univ., Seoul, South Korea

fYear

2011

fDate

6-11 March 2011

Firstpage

60

Lastpage

64

Abstract

In this paper, a two-stage AC/DC converter is presented for a low-profile laptop adaptor. The system consists of a boost power factor preregulator and LLC resonant converter. The preregulator features high PF and high-efficiency, while secondary LLC converter features zero voltage switching (ZVS). The transformer in LLC converter is splited in two to reduce current stress and converter height. The proposed circuit operates at high switching frequency to increase power density. A thermal analysis of the proposed converter is discussed and analyzed. The proposed system is verified by a 40W experimental prototype for a 6.3mm-thick laptop adaptor.

Keywords

AC-DC power convertors; laptop computers; power supplies to apparatus; LLC resonant converter; converter height; laptop adaptor; low-profile AC/DC converter; power factor preregulator; zero voltage switching; DC-DC power converters; Inductors; Prototypes; Temperature measurement; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE

Conference_Location

Fort Worth, TX

ISSN

1048-2334

Print_ISBN

978-1-4244-8084-5

Type

conf

DOI

10.1109/APEC.2011.5744576

Filename

5744576