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TPS92692-Q1: 应用升降压拓扑时,MOS GATE引脚出现大小波

Part Number: TPS92692-Q1
Other Parts Discussed in Thread: TPS92692

你好

在应用TPS92692芯片时,应用拓扑为升降压拓扑,负载电流为0.34A*duty(0.4)=0.136A ,应用PWM调光,负载颗粒1颗 3.5V,输入电压范围9-16V,在输入电压高于

12V时,MOS管 GATE引脚出现大小波 如下图所示,黄色为SW节点电压,蓝色为驱动GATE端电压,麻烦帮忙分析一下为什么会出现大小波?