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TPS92692-Q1: 芯片在应用PWM调光的过程中输入电压的状态是什么样的?

Part Number: TPS92692-Q1

你好,如下图所示,芯片在进行PWM调光,这个时候我想直达输入电压的状态是什么样的? 

也会出现高低的PWM状态的电压? 测试出现了高低的PWM的输入电压,正常吗?

规格书中的测试图如下: