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联系：13652437521柯’RPAM8003userguidePAM8003userguide1、TheschematicofPAM8003.R120KAUDIO_5VSDR310K31Q1AMPENPMBT3904R510K2SD:AlogicLowonthispindisablestheoutputsandalogichighenablestheoutput.0V-5V.SD/MUTEInputHigh(>1.5v),SD/MUTEInputLow(<0.4v).AUDIO_5V116PVDDLPVDDRAUDIO_5VC5C6LOUT_N215ROUT_NC7C810u/10V1uF/10V-OUTL-OUTR1uF/10V10u/10V314PGNDLPGNDRLOUT_P413ROUT_P+OUTLPAM8003+OUTRSD512VOLR9100KPWMSHDN/VOLUMEC151uF/10V611C14VREFNC0.1uF/10VLINE_IN_LC10R100710R110C111uF/10VLINE_IN_RINLINR1uF/10V89R710GNDVDDAUDIO_5VU1C9R12061uF/10VPAM8003amplifierInput&OutputMCUcontrolsignalAMPENSDPWMNote:1、EMI部分磁珠选择高频阻抗大，RdsonAnalogaudioinputLINE_IN_L小，电流额定足够的；电容建议不超过VCC5R20R23WAUDIO_5VLINE_IN_R1nf；C200.1/16V+C1+C2C3、请将退偶电容470u/16V470u/16V0.1/16VClass-DAudiooutput2C5/C6/C7/C8/C9/R_OUT-紧靠引脚放置；请保证R_OUT+C12ICPowerGND与电流的续流能力；L_OUT-traceL_OUT+SystempowerRipplesolutionFB2FB3600Ω2A600Ω2AROUT_NR_OUT-LOUT_PL_OUT+C16C17220p/50V220p/50VFB4C18FB5C19AnalogGNDPowerGND600Ω2A220p/50V600Ω2A220p/50VROUT_PR_OUT+LOUT_NL_OUT-GNDSystemEMISolutionPowerAnalogMicroelectronics,Inc.PAM8003userguide2、LayoutguidelinePCBLayoutGuidelinesGrounding(1)Useplanegroundingorseparategrounds(2)DonotuseonelineconnectingpowerGNDandanalogGND(3)Outputnoisegroundsmusttietosystemgroundatthepowerinexclusively.(4)Signalcurrentsfortheinputsneedtobereturnedtoquiteground.ThisgroundonlytiestothesignalcomponentsandtheGNDpin.PowerSupply(1)VDDandeachofPVDDneedtobeseparatedandtiedtogetheratthesystempowersupply.(2)Recommendthattheallthetracecouldberoutedasshortandthickaspossible.(3)Anybarricadeplacedinthetracecouldresultinthebadperformanceoftheamplifier.ComponentsPlacementDecouplingCapacitors(1)Thepowersupplycapacitors(C5,C6,C8,C7andC9)needtoplaceveryclosetothePAM8003’spins(2)Cvref(VREF)shouldbeplaceclosedassoonaspossible(3)Inputresistors(Ri)andinputcapacitors(Ci)placeclosedtoinputpinsassoonaspossibleOutputfilter(1)TheferriteEMIfilte
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