A Universal Adaptive Driving Scheme for Synchronous Rectification in LLC Resonant Converters
A Universal Adaptive Driving Scheme for Synchronous Rectification in LLC Resonant Converters
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DOI：
10.1109/tpel.2012.2184304
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发表时间：
2012-01
影响因子：
6.7
通讯作者：
Weiyi Feng;F. Lee;P. Mattavelli;Daocheng Huang
中科院分区：
文献类型：
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作者：
Weiyi Feng;F. Lee;P. Mattavelli;Daocheng Huang
提出了一种同步整流（SR）通用自适应驱动方案。检测同步整流器的漏极到源极电压，从而检测并联体二极管的导通。利用所提出的SR驱动方案，调整SR关断时间以消除体二极管导通。SR栅极驱动信号可以在所有工作频率区域内调谐。此外，还介绍了一个简单的数字实现。与模拟控制相比，可以实现更智能、更精确的SR控制，提高变换器效率。为了快速成型，数字SR调谐系统在Cyclone III现场可编程门阵列（FPGA）中实现。
In this paper, a universal adaptive driving scheme for synchronous rectification (SR) is proposed. The drain to source voltage of the synchronous rectifier is sensed so that the paralleled body diode conduction is detected. Using the proposed SR driving scheme, the SR turn-OFF time is tuned to eliminate the body diode conduction. The SR gate driving signal can be tuned within all operating frequency regions. Moreover, a simple digital implementation is introduced. Compared with analog ones, it enables more intelligent and precise SR control, improving converter efficiency. For rapid prototyping purposes, the digital SR tuning system is realized in Cyclone III field-programmable gate array (FPGA).