避免通过最小化电源单端输出，D 类音频放大器上抽过电压应力

摘要：本应用指南解释什么电源抽以及如何出现在雇用单端输出负载的D类音频放大器的设计中。本文将缓解问题的三个设计解决方案。数学方程表明，使用大于1000µF电源电容器的大大减少的现象。MAX9742D类放大器用作设计示例。Maxim>AppNotes>AudioCircuitsKeywords:powersupplypumping,ClassD,singleended,audioamplifierApr16,2010APPLICATIONNOTE4260AvoidOvervoltageStressesbyMinimizingPower-SupplyPumpingonSingle-EndedOutput,ClassDAudioAmplifiersAbstract:Thisapplicationnoteexplainswhatpower-supplypumpingisandhowitoccursindesignsthatemployaClassDaudioamplifierwithsingle-endedoutputloads.Thearticlepresentsthreedesignsolutionsthatwillreducetheproblem.Mathematicalequationsshowthatuseofpower-supplycapacitorsgreaterthan1000Fgreatlyreducethephenomenon.TheMAX9742ClassDamplifierservesasdesignexample.ThisappnoteisbasedonasimilararticlethatwaspublishedinApril2009onthe