TPS63020: TPS63020 inductor bottom gnd copper.

Hi  Kwon,

It is depend on your actual system.

From my side, i would like no GND at bottom of inductor to decrease parasitic cap.

Regards

Tao

Hi Tao,

Thank you for your answer.

I have asked the same question before about the LMR38010 inductor.

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1300281/lmr38010-inductor-gnd-layout

At this time, I was answered that having gnd copper under the inductor is effective for emi.

I thought it applied to all products.

Can the gnd copper under the inductor for each product have good or bad emi effects?

Among them, does TPS63020 have worse EMI if it has gnd copper under the inductor?

Why is the datasheet recommend inductor gnd copper layout different for each product?

Best Regards,

Hi  KWON,

As mentioned. EMI is a system level test.

Also, for different application engineer, they may have different understanding about this layout.

But from my side, i would like say no GND under inductor should be better, because we are not sure the actual EMI infulance from this layout. But it is a sure thing that it will decrease efficiency because a higher parasitic cap caused by this layout.

Regards

Tao

Hi Tao,

Thank you for the detailed explanation.

Best regards,

KWON.