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你这种连接方式非常不合理,你可以看看TI电源芯片的EVM板,都没有这样连接的
GND和芯片肚子底下的thermal pad直连,可以增强散热,而不是像图中单线连接
芯片左边第4脚与thermal pad连接,去掉电感下面的GND
电感处因为MOS开关的原因会有很多高频噪声,很容易耦合到GND上,尤其影响EMI特性,