Self-Driven Gate Driver for <i>LLC</i> Synchronous Rectification

This letter proposes a self-driven gate driver solely composed of passive components for synchronous rectification (SR). It utilizes the energy converter itself, automatically considers component tolerances and temperature variations critical design parameters, tunes SRs on-time. Furthermore, no microcontroller, auxiliary power supply, or current-sensing/voltage-sensing is required. A great amount cost therefore saved. The proposed preferable to be used some resonant converters operating as dc transformers. presents its practical implementation in an LLC converter. Experimental results illustrate that body diodes' conduction reverse recovery are eliminated.