Analysis and Implementation of LLC Burst Mode for Light Load Efficiency Improvement
- 1 February 2009
- conference paper
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
Burst mode control is applied to improve light load efficiency of LLC converter in this paper. Detailed analysis on characteristic and operation processes of LLC burst mode control with SR is presented. Based on the analysis, some important rules of LLC burst mode control are proposed, which is the key to achieve high light load efficiency. The rules include: the suitable primary and secondary driving timing, design guild line of output filter, reasonable control strategy etc. To verify the analysis, a prototype with 12 V/100 A output has been built. Thanks to the proposed control strategy and optimum design, light load efficiency of LLC converter can be improved significantly, such as efficiency at 10% load can be improved from 92.5% to 94.8%.Keywords
This publication has 2 references indexed in Scilit:
- Standby Mode Control Circuit Design of LLC Resonant ConverterPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007
- The improved burst mode in the stand-by operation of power supplyPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004