Texas Instruments TAS5518 Stereo Amplifier User Manual


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2.1PowerSupply(PSU)Interface(J901andJ900)
Output-StagePowerSupply
SystemPowerSupply
RESET
>1ms
4
1
2
3
PCBConnector
(TopView)
PowerSupply(PSU)Interface(J901andJ900)
TheTAS5518-5152K8EVMmodulemustbepoweredfromexternalpowersupplies.High-endaudio
performancerequiresastabilizedpowersupply,withlowripplevoltageandlowoutputimpedance.
Note:Thelengthofpower-supplycablemustbeminimized.IncreasingthelengthofPSUcable
isequaltoincreasingthedistortionfortheamplifierathighoutputlevelsandlow
frequencies.
Maximumoutput-stagesupplyvoltagedependsofthespeakerloadresistance.Checktherecommended
maximumsupplyvoltageintheTAS5152datasheet.
Table2-1.RecommendedSupplyVoltages
VOLTAGELIMITATIONSCURRENT
DESCRIPTION
(4-ΩLOAD)RECOMMENDATIONS
Systempowersupply15Vto20V0.3A
Output-stagepowersupply0Vto35V6A
(1)
(1)
Theratedcurrentcorrespondstotwo-channelfullscale(80Weach),whichisadequatefora
standardeight-channelamplifierdesign.
TherecommendedTAS5152power-upsequenceisshowninFigure2-1.ForproperTAS5152operation,
theRESETsignalshouldbekeptlowduringpowerup.RESETispulledlowduringpowerupfor200ms
bytheonboardresetgenerator(U73).
Figure2-1.RecommendedPower-UpSequence
Figure2-2.J901andJ900PinNumbers
Table2-2.J901PinDescription
PINNETNAME
DESCRIPTION
NO.ATSCHEMATICS
1PVDDOutput-stagepowersupply
2SYSTEMSystempowersupply
3GNDGround
4GNDGround
SystemInterfaces 12SLEU074–June2006
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