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TPS2834的LOWDR波形无法输出

Other Parts Discussed in Thread: TPS2834, TPS28226

使用tps2834驱动csd87350设计同步buck电路,用F5132的hi-res TimerD驱动TPS2834,频率1MHz。当MCU输出的波形占空比高于78%,tps2834的LOWDR引脚无波形输出,HIGHDR输出的波形正常,tps2834的datasheet上的rise/fall time 50ns,请问是波形的rise/fall time 导致的吗????