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你好，我现在用了一颗TPS5430，24V转5V给我设备供电，测的效率很低只有50%左右，电路图如下，TPS5430输入端：26.26V 22mA，TPS5430输出端：4.84V 67mA，效率只有56.13%。
电路图看附件。
同问
