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LM5041峰值电流控制问题

Other Parts Discussed in Thread: LM5041

LM5041芯片FB接地光耦隔离反馈到COMP端,但是COMP端电压由0-5V变化,BUCK级占空比在0-6.5%变化,在占空比为6.5%时CS引脚波形如图所示。是哪里问题?波形如插图所示,是因为电感电流尖峰太大吗?我将CS接地,BUCK级是可以接近满占空比输出的。