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BQ24073芯片在接了负载之后会发生电流声，负载变化越大声音越大，负载不变化声音变小，但是会一直有，输入电压5V ，输出4.4V，输出电流60mA-200mA.
这粒IC并没有电感类的磁芯元件，哪来电流声？感觉应该是供电电源或负载发出的动静。
