100 MHz, 20 V, 90% efficient synchronous buck converter with integrated gate driver
100 MHz, 20 V, 90% efficient synchronous buck converter with integrated gate driver
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100%20MHz,%2020%20V,%2090%%20efficient%20synchronous%20buck%20converter%20with%20integrated%20gate%20driver
DOI：
10.1109/ecce.2014.6953899
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
D. Maksimović
中科院分区：
文献类型：
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作者：
Yuanzhe Zhang;Miguel Rodriguez;D. Maksimović
本文介绍了一种基于GaN-on-SiC集成电路的同步降压变换器，包括半桥功率级和改进的有源上拉栅极驱动级。集成改进型有源上拉驱动器利用耗尽模式器件特性，以低功耗实现快速切换。介绍了同步降压变换器样机的设计原理和结果，工作在100 MHz开关频率下，从20 V输入电压输出高达7 W的功率。测量的功率级效率峰值在91%以上，在广泛的工作条件下保持在85%以上。实验结果表明，该转换器能够准确跟踪带宽为20mhz的LTE包络信号，效率为83.7%。
This paper describes a synchronous buck converter based on a GaN-on-SiC integrated circuit, which includes a halfbridge power stage, as well as a modified active pull-up gate driver stage. The integrated modified active pull-up driver takes advantage of depletion-mode device characteristics to achieve fast switching with low power consumption. Design principles and results are presented for a synchronous buck converter prototype operating at 100 MHz switching frequency, delivering up to 7 W from 20 V input voltage. Measured power-stage efficiency peaks above 91%, and remains above 85% over a wide range of operating conditions. Experimental results show that the converter has the ability to accurately track a 20 MHz bandwidth LTE envelope signal with 83.7% efficiency.