TheSSM2301isafullyintegrated,highefficiency,Class-Daudioamplifierdesignedtomaximizeperformanceformobilephoneapplications.Theapplicationcircuitrequiresaminimumofexternalcomponentsandoperatesfromasingle2.5Vto5.0Vsupply.Itiscapableofdelivering1.4Wofcontinuousoutputpowerwithlessthan1%THD+Ndrivingan8Ωloadfroma5.0Vsupply.

TheSSM2301featuresahighefficiency,lownoisemodulationschemethatdoesnotrequireexternalLCoutputfilters.Themodu-lationprovideshighefficiencyevenatlowoutputpower.TheSSM2301operateswith85%efficiencyat1.4Winto8Ωfroma5.0Vsupplyandhasasignal-to-noiseratio(SNR)thatisgreaterthan98dB.Spread-spectrummodulationisusedtoprovidelowerEMI-radiatedemissionscomparedwithotherClass-Darchitectures.

TheSSM2301hasamicropowershutdownmodewithamaximumshutdowncurrentof30nA.ShutdownisenabledbyapplyingalogiclowtotheSDpin.

Thedevicealsoincludespop-and-clicksuppressioncircuitry.Thisminimizesvoltageglitchesattheoutputduringturn-onandturn-off,thusreducingaudiblenoiseonactivationanddeactivation.

ThefullydifferentialinputoftheSSM2301providesexcellentrejectionofcommon-modenoiseontheinput.Inputcouplingcapacitorscanbeomittedifthedcinputcommon-modevoltageisapproximatelyVDD/2.

TheSSM2301alsohasexcellentrejectionofpowersupplynoise,includingnoisecausedbyGSMtransmissionburstsandRFrectification.PSRRistypically63dBat217Hz.

Thegaincanbesetto6dBor12dBbyutilizingthegaincontrolselectpinconnectedrespectivelytogroundortoVDD.Gaincanalsobeadjustedexternallybyinsertingaresistorinserieswitheachinputpin.

TheSSM2301isspecifiedoverthecommercialtemperaturerange(−40°Cto+85°C).Ithasbuilt-inthermalshutdownandoutputshort-circuitprotection.Itisavailableinbothan8-lead,3mm×3mmlead-framechipscalepackage(LFCSP)andan8-leadMSOPpackage.

Applications
 

Mobilephones

MP3players

Portablegaming

Portableelectronics

Educationaltoys