A Pre-Charge Tracking Technique in the 40 MHz High-Speed Switching 48-to-5 V GaN-Based DC-DC Buck Converter for Reducing Large Self-Commutation Loss and Achieving a High Efficiency of 95.4%

Tzu Hsien Yang, Yong Hwa Wen, Chun Kai Chiu, Ke Horng Chen, Ying Hsi Lin, Shian Ru Lin, Tsung Yen Tsai

Research output: Contribution to journalArticlepeer-review

Abstract

For automobile applications, a high-speed switching 48-to-5 V dc-dc buck converter is implemented in the 0.5-&#x03BC;m CMOS and 0.5-&#x03BC;m gallium nitride (GaN)-on-Si processes. This proposed converter includes a pre-charge tracking technique, a temperature-dependent controlled gate driver, and an adaptive relaxation gate drive control technique. The measurement results of this article show that the efficiency can be increased by about 10.3&#x0025; and can ensure the driving current capacity of enhance GaN (E-GaN). The built-in local negative feedback loop improves the reliability and reduces <formula> <tex>$R_{ON}$</tex> </formula> by 21&#x0025; to reach the peak efficiency as high as 95.4&#x0025;.

Original languageEnglish
JournalIEEE Journal of Solid-State Circuits
DOIs
StateAccepted/In press - 2022

Keywords

  • Detectors
  • Electromagnetic interference
  • Enhance GaN
  • Gallium nitride
  • gallium nitride
  • Gate drivers
  • Logic gates
  • power density
  • reliability
  • Switches
  • Switching circuits
  • temperature-dependent controlled gate driver.

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