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TPS61161无法进入easyscale模式

Other Parts Discussed in Thread: TPS61161

 我们使用的主控芯片没有PWM输出,所以使用的easyscale one-wire模式控制TPS61161,示波器打了时序完全满足芯片手册要求啊,我们Vin是5v,上电后FB恒定1.2V,ctrl脚下拉1M欧,其他外围电路都和手册上的参考电路设计一致,想问一下这款IC在使用easyscale one-wire模式控制时还需要注意些什么??