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这种嗡嗡声或振铃可能常见于电路。 VLED 电源轨的频率处于人类可闻频率范围内、因此我们的器件面临特别的风险。 为了降低这种噪声、应考虑电容器和电感器选择、电路板布局布线和布线等因素。 尤其是陶瓷电容器都会造成损害。
我推荐以下资源来调试您的硬件：
https://www.eetimes.com/power-tip-49-avoid-these-common-multi-layer-ceramic-capacitor-pitfalls/
https://www.researchgate.net/publication/229021707_Capacitors_for_Reduced_Microphonics_and_Sound_Emission
https://www.newark.com/wcsstore/ExtendedSitesCatalogAssetStore/cms/asset/pdf/americas/common/nic-components/MLCC-Ringing-Singing-NSPH-SMT-FilmCapacitors-May2015.pdf
https://www.edn.com/reducing-mlccs-piezoelectric-effects-and-audible-noise/
https://www.onsemi.com/pub/Collateral/AND8172-D.PDF
改变瞬态电流对这种情况没有作用。 限制瞬态电流将减少 VLED 线路上的过冲、但这可能对声音影响很小或没有影响。
此致、
奥斯汀
