TheSSM2304isafullyintegrated,highefficiency,Class-Dstereoaudioamplifier.Itisdesignedtomaximizeperformanceforportableapplications.Theapplicationcircuitrequiresamini-mumofexternalcomponentsandoperatesfromasingle2.5Vto5.0Vsupply.Itiscapableofdelivering2Wofcontinuousoutputpowerwithlessthan10%THD+Ndrivinga4Ωloadfroma5.0Vsupply.
TheSSM2304featuresahighefficiency,lownoisemodulationscheme.Itoperateswith85%efficiencyat1.4Winto8Ωfroma5.0Vsupplyandhasasignal-to-noiseratio(SNR)thatisbetterthan98dB.PDMmodulationisusedtoprovidelowerEMI-radiatedemissionscomparedwithotherClass-Darchitectures.
TheSSM2304hasamicropowershutdownmodewithatypicalshutdowncurrentof20nA.ShutdownisenabledbyapplyingalogiclowtotheSDpin.
Thearchitectureofthedeviceallowsittoachieveaverylowlevelofpopandclick.Thisminimizesvoltageglitchesattheoutputduringturn-onandturn-off,thusreducingaudiblenoiseonactivationanddeactivation.
ThefullydifferentialinputoftheSSM2304providesexcellentrejectionofcommon-modenoiseontheinput.Inputcouplingcapacitorscanbeomittedifthedcinputcommon-modevoltageisapproximatelyVDD/2.
TheSSM2304alsohasexcellentrejectionofpowersupplynoise,includingnoisecausedbyGSMtransmissionburstsandRFrectification.
TheSSM2304hasapresetgainof18dB,whichcanbereducedbyusingexternalresistors.
TheSSM2304isspecifiedoverthecommercialtemperaturerange(−40°Cto+85°C).Ithasbuilt-inthermalshutdownandoutputshort-circuitprotection.Itisavailableina16-lead,3mm×3mmlead-framechipscalepackage(LFCSP).
Applications
NotebooksandPCs
Mobilephones
MP3players
Portablegaming
Portableelectronics
Educationaltoys