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关于TPS65261计算功耗的问题

Part Number: TPS65261

TI工程师你好。

我想了解TPS65261的功耗是如何计算的,比如输入5V输出1.1V/1A,1.5V/0.7A,3.3V/0.8A。多路输出的功耗要如何计算?是单独算每路的功耗乘以热阻后最后相加?TPS65261的热阻要如何选取?是否有相关的文档说明。谢谢。