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TPSM64406: TPSM64406芯片六相并联芯片啸叫 !!!

Part Number: TPSM64406

我搭建了 TPSM64406六相并联电路以实现我的输出电流需求,但是PCB在测试过程中始终啸叫,我去除了输入滤波电感和滤波电容,但啸叫依然存在,那此啸叫可能是芯片产生,那么这个产生的原因是什么呢?芯片为手动贴片,输出纹波约为50mV,输出电流可达到理论值18A

希望能告知我可能的原因,非常感谢!