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PTH12040 makes noise.

Expert 1060 points

Hi, TI experts.

 

We have mass production using PTH12040 in PMIC.

It is no problem until production this lot.

Newly applied PTH12040 has some noise like " shi~~~ ".

And there are differences old and new module. The old module inductor’s coil has a glue but new module doesn’t have glue on coil.

I attached old_normal module and new_abnormal module.

 

old - normal

new- abnormal.

Could you please check the coil's glue can affect the noise?  And Could you Check the manufacture of this two coil?

 

Best Regards.

Jay.