Digital implementation of driving scheme for synchronous rectification in LLC resonant converter

Author

Feng, Weiyi ; Huang, Daocheng ; Mattavelli, Paolo ; Fu, Dianbo ; Lee, Fred C.

Author_Institution

Center for Power Electron. Syst., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

fYear

2010

fDate

12-16 Sept. 2010

Firstpage

256

Lastpage

263

Abstract

A digital implementation of synchronous rectification (SR) driving scheme for LLC resonant converter is proposed in this paper. Compared with analog ones, digital implementation enables more intelligent and precise SR control, improving converter efficiency. In the proposed SR driving scheme, the drain to source voltage of synchronous rectifier on the secondary side is sensed, so that the paralleled body diode conduction is detected. The SR turn-off time is digitally tuned based on the body diode conduction information. For rapid prototyping purposes, the digital tuning system is realized in Cyclone III FPGA.

Keywords

diodes; field programmable gate arrays; rectification; resonant power convertors; Cyclone III FPGA; LLC resonant converter; SR control; SR turn-off time; body diode conduction; synchronous rectification; Converters; Logic gates; Sensors; Strontium; Switches; Switching frequency; Tuning; Digital control; LLC resonant converter; Synchronous rectification;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2010 IEEE

Conference_Location

Atlanta, GA

Print_ISBN

978-1-4244-5286-6

Electronic_ISBN

978-1-4244-5287-3

Type

conf

DOI

10.1109/ECCE.2010.5618033

Filename

5618033