AN12943A功放PDF图

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1、DATASHEETPartNo.AN12943APackageCodeNo.HSOP056-P-0300ASEMICONDUCTORCOMPANYMATSUSHITAELECTRICINDUSTRIALCO.,LTD.Publicationdate:July2004SDC00057AEB1AN12943AContents¢Overview…....................................................……………………………………………………………………..3¢Features………………………………….…………………………………

2、………………………………………..3¢Applications……………………………….…………………………………………………………………………..3¢BlockDiagram……………...…………….…………………………………………………………………………..4¢PinDescriptions…………………………..................................…………………………………………………..5¢AbsoluteMaximumRatings………………………………………………………………………………………..7¢OperatingSupp

3、lyVoltageRange…………………………………………………………………………………..7¢ElectricalCharacteristics……………………………………….…………………………………………………..8¢ControlTerminal,TheModeTable………………………………………………………………………………..11¢TechnicalData……………………………….……………....……………………………………………………..12óCircuitdiagramsoftheinput/outputpartandpinfunctionde

4、scriptions.....................................……………12óControlsequenceatpoweron/off………......…………………….………………………………………………19óPowerdissipationofpackageHSOP056-P-0300A….................................…….........………………………20óUsagenotes………………………………………............................................

5、............………………………..20óMaincharacteristics….…………………….................…………………………………….........………………..21SDC00057AEB2AN12943AAN12943AAudiosignalprocessingICfornotebookPC¢OverviewUnit:mmAN12943Aisanone-chipICforthestereospeakerswhichcanoutput1Wby8W,headphoneamplifiers,lineamplifiersandele

6、ctronicvolumes.SincetheheadphoneamplifierisadualpowersupplysystemwhichusesaDC-DCconvertertocreatethenegativepowersource,anoutputcapacitorisnotnecessary.AlsotheAN12943Aisbuilt-inpowersavingon/offfunctiontoautomaticallydetectinginputsignaltosavethepowerofspeakeramplifier.¢FeaturesóSpeakera

7、mplifier1W´2-channel:8W,VCC=5VóHeadphoneamplifierDualpowersupplysystemdoesn'trequireoutputcapacitor.óBuilt-inautomaticpowersavingfunction.Itdetectsinputsignalsandswitcheson/off(withtheon/offswitchforHSOP056-P-0300Atheautopowersaving).óBuilt-inelectronicvolumeandlineamplif