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TPS5260芯片发热问题

Other Parts Discussed in Thread: TPS54260

使用TPS54260的输入9V,输出5V/1.5A,会出现芯片发热的问题,以及L5和D83也会发热。是否与选取的输出电感值及参数有关呢?还是这颗芯片本身的热阻较大问题?