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JSSC 2019第12期Power Management

Due to the RSSM technique the switching period varies from T nt o T n 1 randoml

论文分析了RSSM技术导致的开关周期随机变化对电压调节性能的影响。
RSSM技术开关周期电压调节输出电容GaN功率转换器
创新点1:提出Markov C-RSSM技术(方法创新),通过马尔可夫链随机时钟发生器实现开关频率的模拟调制,有效扩展EMI频谱分布,显著降低电磁干扰。
创新点2:改进电压调节性能(系统创新),分析随机开关周期变化导致的输出电压抖动问题,提出无需大幅增加输出电容的解决方案,提升系统稳定性。
创新点3:优化输出电容设计(电路创新),在保持高频GaN功率转换器性能的同时,通过技术改进减少对输出电容的依赖,降低PCB面积和成本。
创新点4:实现无限随机开关频率(方法创新),通过模拟调制技术生成无限数量的随机开关频率,相比传统数字方法获得更优的扩频效果。
Abstract
d n + 1r e p r e s e n tt h enth and the ( n + 1)th switching cycle, respectively. For stability and noise concerns, the loop gain bandwidth of the converter is usually designed lower than the switching frequency. Hence, the random T change cannot be immediately detected by the feedback controller. As a result, when the switching cycle alters from T [n]t o T [n+1] randomly, T ON [n+1] remains unchanged from TON [n]. The inductor L is thus charged for the same period of time. However, as T [n+ 1]