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T3T1 Backlight driver buzzing #4939

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kopecdav opened this issue Apr 22, 2025 · 0 comments
Open

T3T1 Backlight driver buzzing #4939

kopecdav opened this issue Apr 22, 2025 · 0 comments
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bug Something isn't working as expected

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@kopecdav
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kopecdav commented Apr 22, 2025 •
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T3T1 backlight driver TPS61043 generate a noise in audible spectrum.

Single device is barely audible, but multiple devices makes quite annoying and loud sound.

The noise is clearly generated by backlight driver which is driven by PWM at same frequency.

Image

Sound spectrum analyzer
image
@kopecdav kopecdav added the bug Something isn't working as expected label Apr 22, 2025
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@kopecdav @TychoVrahe @cepetr