Browse > Article
http://dx.doi.org/10.7471/ikeee.2013.17.3.267

A Design of PFM/PWM Dual Mode Feedback Based LLC Resonant Converter Controller IC for LED BLU  

Yoo, Chang-Jae (College of Information and Communication Engineering, Sungkyunkwan University)
Kim, Hong-Jin (College of Information and Communication Engineering, Sungkyunkwan University)
Park, Young-Jun (College of Information and Communication Engineering, Sungkyunkwan University)
Lee, Kang-Yoon (College of Information and Communication Engineering, Sungkyunkwan University)
Publication Information
Journal of IKEEE / v.17, no.3, 2013 , pp. 267-274 More about this Journal
Abstract
This paper presents a design of LLC resonant converter IC for LED backlight unit based on PFM/PWM dual-mode feedback. Dual output LLC resonant architecture with a single inductor is proposed, where the master output is controlled by the PFM and slave output is controlled by the PWM. To regulate the master output PFM is used as feedback to control the frequency of the power switch. On the other hand, PWM feedback is used to control the pulse width of the power switch and to regulate the slave output. This chip is fabricated in 0.35um 2P3M BC(Bipolar-CMOS-DMOS) Process and the die area is $2.3mm{\times}2.2mm$. Current consumptions is 26mA from 5V supply.
Keywords
Dual-modefeedback; LLCresonantconverter; LEDBLU; PWM; ZVS;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Robert W. Erickson & Dragan Maksimovic, "Fundamentals of Power Electronics Second Edition", 2nd edition, 2001, ISBN 0-7923-7270-0
2 Bing Lu, "Optimal Design Methodology for LLC Resonant Converter", in APEC, Mar. 2006
3 Seong Wha Hong, Hong Jin Kim, Joon-Sung Park, Young Gun Pu, Jeongin Cheon, Dae Hoon Han, Kang Yoon Lee, "Secondary-Side LLC Resonant Controller IC with Dynamic PWM Dimming and Dual-Slope Clock Generator for LED Backlight Units", IEEE Trans. Power Electronics., vol. 24, Issue. 11, pp. 3410-3422, Nov. 2011
4 Lei Zhang, Zhiping Yu, Xiangging He, "An Improved Sawtooth Oscillator and Its Application in On-chip Femto-ampere Current Monitoring", in ICSCICT, pp. 2073-2075, Oct. 2006
5 Tak-Jun Oh, Ara Cho, Seok-Lip Ki, and In-Chul Hwang "A low-power and low-cost digitally-controlled boost LED driver IC for backlights", Solid State Circuits Conference (A-SSCC), 2012 IEEE Asian, pp. 237-240, Nov. 2012
6 Sung-Soo Hong, Sang-Hyun Lee, Sang-Ho Cho, Chung-Wook Roh, and Sang-Kyoo Han "A New Cost-Effective Currentz-Balancing Multi-Channel LED Driver for a Large Screen LCD Backlight Units", KIPE Journal of Power Electronics, Vol.10, No. 4, pp. 351-356, July. 2010   과학기술학회마을   DOI   ScienceOn