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

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 dr...

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Bibliographic Details
Published in2010 IEEE Energy Conversion Congress and Exposition pp. 256 - 263
Main Authors Weiyi Feng, Daocheng Huang, Mattavelli, Paolo, Dianbo Fu, Lee, Fred C
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2010
Subjects
Converters
Digital control
LLC resonant converter
Logic gates
Sensors
Strontium
Switches
Switching frequency
Synchronous rectification
Tuning
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ISBN1424452864
9781424452866
ISSN2329-3721
DOI10.1109/ECCE.2010.5618033

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Summary: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.
ISBN:1424452864
9781424452866
ISSN:2329-3721
DOI:10.1109/ECCE.2010.5618033