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LMR14030: Inductive sound noise for LMR14030

Li Chen92
Expert 3040 points
Part Number: LMR14030

Hi TI expert

I set output voltage is 12.8V, when input voltage is higher than 12.8V, it can works well.

But when input voltage set lower than 12.8V, the Inductive sounds noise.

Here is my schematic. Please help to check.

Best regards,

Thomas

  • 0
    TI__Mastermind 28020 points

    Hi Thomas, 

    The LMR14030 is a step-down, buck converter. It requires that the input voltage be higher than the output voltage. 

    I would recommend a minimum input voltage of 13.2V to 13.5V in order to keep the output voltage in regulation.

    Thanks, Jason