Open AccessA novel high‐frequency floating resonant gate driver with reduced gate driving loss
Author(s) -
Gu Cheng,
Qian Qinsong,
Wang Yanting,
Ding Song,
Zhou Ziyan,
Dong Tianhao,
Sun Weifeng
Publication year - 2022
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/pel2.12326
Subject(s) - gate driver , gate equivalent , electrical engineering , power (physics) , nand gate , capacitor , logic gate , engineering , driver circuit , electronic engineering , gate oxide , transistor , voltage , physics , quantum mechanics
Conventional resistive gate driving circuits suffer from significant recovery gate driving losses, especially at MHz ranges. The increasing gate driving losses brought by high switching frequency place a limitation to the high power density converter design. This paper proposes a novel floating resonant gate driver which maintains high efficiency at several megahertz operating frequency. The gate loss reduction is achieved by adopting a resonant process with driving power recycling. Part of the gate driving power can be recycled to a gate driving capacitor in the gate driving loop during charging and discharging. The proposed gate driver merges the merits of fast switching speed and low gate driving losses. A prototype of LLC power converter with the proposed floating resonant gate driver operating at 3.5 MHz is implemented. According to the experimental verification, the proposed gate driver realized a driving loss reduction by 70% and theoretical analysis is in good agreement with experimental results.