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各位好，电路原理图如附件所示，输入电压24v，输出22.5v，上电开始正常输出，过一会就没输出了，芯片烫手滋滋响，求各位指点是什么原因导致芯片坏了？
7360.Schematic Prints.pdf
万用表测量，也没发现哪个引脚短路，具体阻抗没注意看
