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LP8553: Audible noise and PWM frequency setting

Part Number: LP8553

Hi TI,

I recently have the audible noise from this device, the PWM frequency setting shows how to configure through registers, PWM_RES and PWM_FREQ, but this can adjust up to 19.2kHz.

Refer to the section PWM Interface Characteristics, it stated PWM frequency range from 0.1kHz to 25kHz.

Can you tell me how to set the PWM frequency at 22kHz to 25kHz range please?

In addition, please advise any tips or recommendation how to get rid of the audible noise.

Thank you.

Gilbert