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LM5161: LM34940 inductance gear whine

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Part Number:LM5161

hi TI,

Remark, I can't fill LM34940 part number in above part number, so use LM34940 to replace.

I Have one customer used LM34940, which they find their output inductance have gear whine, and this schematic as below.

and they have used two brand inductance, one is MAPM0630F, another is KMPH0630, and KMPH0630's gear whine is lighter than MAPM0630F.

could you help to improve it? and could you tell us, what's reason will lead to this gear whine, thanks.


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