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测试tps62745电路,电感会嗞嗞响

Other Parts Discussed in Thread: CC2541, TPS62745

dear FAE:

如下图,我们的电源输入形式是4节干电池串联2900mAs@6v;dcdc变换3.0v输出,电感的型号是WPN252012H4R7MT;

我们在开机测试时,发现电感会发出嗞嗞响,做了5个样机所用物料都是新的,但都有这样的问题;

经测试,电源输入端的电流才是40mA;

请问,这样的问题,该如何解决?

感谢;