This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS61081: inductor scream

Part Number: TPS61081

Hi, everyone:

I design my board reference to GPEVM of AM437x, which chose TPS61081 as its LCD backlight solution. Everything is OK, except inductor scream.

We have already confirm that it is the 4.7uH inductor work with TPS61081 made this sharp sound. Here is the circuit of GPEVM and mine:

The biggest difference between us is the selection of inductor.

GPEVM:

My board:

I wonder why this happen and what should I do to avoid this problem.