Self-Driven Gate Driver for LLC Synchronous Rectification

This letter proposes a self-driven gate driver solely composed of passive components for synchronous rectification (SR). It utilizes the energy of the converter itself, automatically considers component tolerances and temperature variations of critical design parameters, and tunes the SRs on -time....

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Bibliographic Details
Published in:IEEE transactions on power electronics 2021-01, Vol.36 (1), p.56-60
Main Authors: Li, Mingxiao, Ouyang, Ziwei, Andersen, Michael A. E., Zhao, Bin
Format: Article
Language:English
Subjects:
Auxiliary power units
Converters
Design parameters
Electric power supplies
Gate drivers
Harmonic analysis
Logic gates
Microcontrollers
MOSFET
Passive components
Resonant converters
Resonant frequency
self-driven gate drivers
Sensors
synchronous rectification
Tolerances
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Summary:This letter proposes a self-driven gate driver solely composed of passive components for synchronous rectification (SR). It utilizes the energy of the converter itself, automatically considers component tolerances and temperature variations of critical design parameters, and tunes the SRs on -time. Furthermore, no microcontroller, auxiliary power supply, or current-sensing/voltage-sensing components is required. A great amount of cost is therefore saved. The proposed gate driver is preferable to be used to some resonant converters operating as dc transformers. This letter presents its practical implementation in an LLC resonant converter. Experimental results illustrate that the body diodes' conduction and reverse recovery are eliminated.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2020.3003417