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Self-Driven Gate Driver for LLC Synchronous Rectification
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DOI：10.1109/TPEL.2020.3003417.png)
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Abstract
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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.
Keywords:
Resonant converters
Gate drivers
Resonant frequency
Harmonic analysis
Logic gates
Sensors
MOSFET
Resonant converters
self-driven gate drivers
synchronous rectification
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