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UCC2809-1: 最大占空比设定

Part Number: UCC2809-1


UCC2809的规格书里定义了最大的占空比事70%,且通过3脚和4脚的电阻可以来设定开关频率和占空比,如果在设计的时候将最大占空比设置成了80%会有什么问题?

CT charge 和CT discharge的时间是根据电阻来决定的吗? 例如RT1是16.5k,RT2为4.3k时,最大占空比时70%还是80%?