两节AA电池产生巨大的音量

摘要：类似的MAX9704D类音频放大器提供了近90％的效率，但他们需要10V操作。由D类放大器的开关模式升压转换器（MAX1771），它从输入产生12V下降到2V，并提供两个安培的输出电流高达结合，这从一对AA电池可以操作。Maxim>AppNotes>AudioCircuitsKeywords:classDaudioamplifiers,switchmodeboostconverters,AAalkalinecellsAug17,2010APPLICATIONNOTE4526TwoAACellsProduceHugeAudioVolumeAbstract:ClassDaudioamplifiersliketheMAX9704offeralmost90%efficiency,buttheyneed10Vtooperate.Byincorporatingaswitched-modeboostconverter(MAX1771),whichgenerates12Vfrominputsdownto2Vanddeliversoutputcurrentsuptotwoamperes,thisclassDamplifiercanoperatefromapairofAAcells.AsimilarversionofthisarticleappearedintheMarch11,2008issueofElectronicDesignmagazine.ClassDaudioamplifiersfromMaximofferalmost90%efficiency,buttheyneed10Vtooperate,and(forbattery-opera