A new tightly-regulated dual-output LLC resonant converter

Author

Choi, Yoon ; Cho, Sang-Ho ; Hong, Sung-Soo ; Cho, Kwang-Seung ; Oh, Dong-Sung ; Han, Sang-Kyoo

Author_Institution

Kookmin Univ. Power Electron. Center, Seoul, South Korea

fYear

2011

fDate

May 30 2011-June 3 2011

Firstpage

839

Lastpage

845

Abstract

A New Tightly-Regulated Dual output LLC resonant converter is proposed in this paper. The proposed converter can get tightly regulated dual-output voltages by both pulse frequency modulation (PFM) and pulse width modulation (PWM) using only one control IC compared with the conventional LLC resonant converter. Therefore, it features a simpler structure, less mass, and lower cost of production. Furthermore, since all power switches are turned on under zero-voltage switching (ZVS) condition, it has several favorable advantages such as a high-efficiency, low switching loss, improved electromagnetic interference (EMI), and reduced burden on the cooling system. This paper presents a dual-output LLC resonant converter applicable to the 40" LCD TV power supply.

Keywords

PWM power convertors; liquid crystal displays; pulse frequency modulation; switches; television displays; zero voltage switching; EMI; LCD TV power supply; PFM; PWM; ZVS condition; control IC; electromagnetic interference; power switch; pulse frequency modulation; pulse width modulation; size 40 inch; switching loss; tightly regulated dual-output voltage; tightly-regulated dual-output LLC resonant converter; zero-voltage switching condition; Magnetic resonance; Magnetic switching; Rectifiers; Switches; Switching frequency; Voltage control; Zero voltage switching; Dual-output; LLC; Resonant converter; Soft-switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on

Conference_Location

Jeju

ISSN

2150-6078

Print_ISBN

978-1-61284-958-4

Electronic_ISBN

2150-6078

Type

conf

DOI

10.1109/ICPE.2011.5944624

Filename

5944624