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本文提出了一种100A、峰值效率93.4%的LLC谐振变换器，其内置一个从初级电流提取的调节器，用于为栅极驱动器供电，从而省去了外部辅助降压变换器或额外辅助绕组。该设计在0.18μm BCD工艺中实现，实现了60V至2V的转换，工作频率为1MHz。
Abstract This paper presents a 100A 93.4%-peak-efficiency LLC resonant converter with an embedded primary-current-extracted regulator. The proposed regulator powers the gate drivers of the LLC converter, eliminating the need for an external auxiliary buck converter or additional auxiliary windings. Fabricated in a 0.18μm BCD process, the proposed regulator occupies a die are of 8.3mm2 and achieves a 60V-to-2V conversion at 1MHz with a peak efficiency of 93.4%. LLC resonant converters are widely used for 48V-to-~1V xPU power delivery because primary-side zero-voltage switching (ZVS) and secondary-side zero-current switching (ZCS) enable high efficiency and compact magnetics. To meet the hundred-amperes load, multiple paralleled discrete GaN/Si power devices are employed, whose gate drivers require a dedicated low-voltage rail (e.g., 5V). In practice, this rail is often produced by a separate
Zeguo Liu1, Yichao Ji1, Zhiren Luo1, Yu Ge1, Weiwei Xu2, Weiwei Huang2, Lin Cheng1,2
University of Science and Technology of China, Hefei, China, 2Hefei CLT Microelectronics, Hefei, China