https://scholars.lib.ntu.edu.tw/handle/123456789/632120
標題: | An Integrated Driver With Bang-Bang Dead-Time Control and Charge Sharing Bootstrap Circuit for GaN Synchronous Buck Converter | 作者: | CHING-JAN CHEN Wang P.-Y Li S.-T Chen Y.-M Chang Y.-C. |
關鍵字: | Bang-bang control; bootstrap circuit; buck converter; dead-time; driver; gallium nitride (GaN) | 公開日期: | 2022 | 卷: | 37 | 期: | 8 | 起(迄)頁: | 9503-9514 | 來源出版物: | IEEE Transactions on Power Electronics | 摘要: | This article proposes a high-frequency integrated gate driver for gallium nitride (GaN) synchronous buck converter. The proposed adaptive bang-bang dead-time control minimizes dead-time at any load condition. Thus, it mitigates the excessive power loss caused by GaN device reverse conduction in high-frequency applications. The proposed charge sharing bootstrap circuit ensures sufficient gate overdrive voltage with reduced chip area. Fabricated in a TSMC 0.25-μm BCD process, the driver integrated circuit enabled GaN-based buck converter to operate at 10 MHz switching frequency with minimal dead-time to as low as 0.4 ns under light load and heavy load conditions. Compared with fixed dead-time control, the proposed work improves around 5% efficiency under heavy load condition. The fully integrated bootstrap circuit with 100 and 60 pF (HV) capacitor obtained the lower than 0.6 V driving voltage drop with only 45% capacitance and around half of the voltage drop compared with a conventional bootstrap circuit. Besides, the proposed driver successfully tackled the parasitic ringing and dead-time overcharging issues in the GaN converter. © 1986-2012 IEEE. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126517383&doi=10.1109%2fTPEL.2022.3159717&partnerID=40&md5=ec2f424868caf8f64537684216946afd https://scholars.lib.ntu.edu.tw/handle/123456789/632120 |
ISSN: | 08858993 | DOI: | 10.1109/TPEL.2022.3159717 | SDG/關鍵字: | Bang bang control systems; Capacitance; DC-DC converters; Gallium nitride; Time delay; Timing circuits; Voltage control; Bang-bang; Bang-Bang control; Bootstrap circuits; Buck converters; Charge sharing; Dead time; Delay; Driver; Time control; III-V semiconductors |
顯示於: | 電機工程學系 |
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