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.

LM5012-Q1: LM5012 inductor is making humming noise

Part Number: LM5012-Q1
Other Parts Discussed in Thread: LM5012

Tool/software:

I have designed Lm5012 circuit for my BMS application for 48V to 12V with rated current of 2A.

Currently, I am testing with power supply of 35V. but inductor is making humming noise even at 10mA load current. I have done schematic as below. I have selected these values based on webench result.

7701.WBDesign8.pdf

Can you please suggest what could be the reason and what should I try?

1. I tried to change Ron (R104) to increase frequency, but not much change

2. I tried to change inductor of 33uH but of compact packing, little bit reduced, but still noise is there.

Thanks,

Monika