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感谢您对TI产品的关注!
关于你的咨询, 两个芯片一起用,本身不会互相干扰,可能是你的PCB布局走线有关系。
或者电感位置的关系。
你参考下这个芯片主页中TI评估板的布局走线看看, 评估板的user guide中有电路图和PCB布局。