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TPS929120-Q1: PWM调光,高电平,波形有毛刺

Part Number: TPS929120-Q1
Other Parts Discussed in Thread: TPS552882

借助USB转TTL,将如下代码发送到TPS929120;

55 c0 61 02 c5
55 c0 60 03 9c
55 d0 50 00 00 89
55 d0 56 10 53 a9
55 f0 20 f0 f0 f0 f0 f0 f0 f0 f0 ad
55 e0 28 f0 f0 f0 f0 15
55 d0 50 ff 0f 8a
波特率:115200.
供电部分,是TPS552882,8v输出,
负载部分:两颗LED串联,
现象:PWM调光,高电平出现杂波,麻烦帮忙排查一下,谢谢