电路板上使用Tps54327作为5V输出,用12V适配器作为输入,但在空载的情况下(5V输出没有接任何负载),摸电感和芯片觉得有些发热,请问这个是正常的么?
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TPS54327是3A的同步降压调整器,固定频率700k,即使是在空载的情况下也是工作在CCM 模式下,有一定的损耗,会微微发热,可检测开关波形以确定是否工作正常。 TPS54329则带有轻载高效模式