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TPS54561: 关于TPS54561功能确认

Part Number: TPS54561

TI工程师你好!

如上图所示关于TPS54561的第四脚功能TR不是很理解该功能的作用,希望给予解释。关于软启动时间的计算,如果电容取最大0.47uF,参考电压0.8V,ISS=1.7uA ,那么TSS=176.94ms对?谢谢!