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P r o d u cc tt IIn n oovvaatti ioonn FFr roo m du nn m
PA13 * PA13A PA13 * PA13A
Power Operational Amplifier
FEATURES
LOWTHERMALRESISTANCE--1.1C/W CURRENTFOLDOVERPROTECTION EXCELLENTLINEARITY--ClassA/BOutput WIDESUPPLYRANGE--10Vto45V HIGHOUTPUTCURRENT--Upto15APeak
ThePA13isastateofthearthighvoltage,veryhigh outputcurrentoperationalamplifierdesignedtodrive resistive,inductiveandcapacitiveloads.Foroptimum linearity, especially at low levels, the output stage is biasedforclassA/Boperationusingathermistorcompensated base-emitter voltage multiplier circuit. The safeoperatingarea(SOA)canbeobservedforalloperatingconditionsbyselectionofuserprogrammable currentlimitingresistors.Forcontinuousoperationunderload,aheatsinkofproperratingisrecommended. ThePA13isnotrecommendedforgainsbelow-3(inverting)or+4(non-inverting). Thishybridintegratedcircuitutilizesthickfilm(cermet) resistors,ceramiccapacitorsandsemiconductorchips tomaximizereliability,minimizesizeandgivetopperformance.Ultrasonicallybondedaluminumwiresprovidereliableinterconnectionsatalloperatingtemperatures. The 12-pin power SIP package is electrically isolated.
DESCRIPTION
APPLICATIONS
MOTOR,VALVEANDACTUATORCONTROL MAGNETICDEFLECTIONCIRCUITSUPTO 10A POWERTRANSDUCERSUPTO100kHz TEMPERATURECONTROLUPTO360W PROGRAMMABLEPOWERSUPPLIESUPTO 90V AUDIOAMPLIFIERSUPTO120WRMS
EQUIVALENT SCHEMATIC
PA13U
http://www.cirrus.com

Copyright (c) Cirrus Logic, Inc. 2008 (All Rights Reserved)
AUG 2008 1 APEX - PA13REVN
PA13 * PA13A
ExTERNAL CONNECTIONS
Product Innovation From
1. ChARACtERistiCs ANd sPECifiCAtioNs AbSOLUTE MAxIMUM RATINGS - PA13/PA13A
Parameter
SUPPLYVOLTAGE,+VSto-VS OUTPUTCURRENT,withinSOA POWERDISSIPATION,internal INPUTVOLTAGE,differential INPUTVOLTAGE,commonmode TEMPERATURE,pinsolder,10smax. TEMPERATURE,junction(Note3) TEMPERATURERANGE,storage OPERATINGTEMPERATURERANGE,case -40 -25 -37 -VS
Formedleadsavaliable SeepackagestyleEE
12-pin siP PACKAGE STYLE DP
Symbol
Min
Max
100 15 135 37 VS 260 175 85 85
Units
V A W V V C C C C
CAUTION
Theexposedsubstratecontainsberyllia(BeO).Donotcrush,machine,orsubjecttotemperatures inexcessof850Ctoavoidgeneratingtoxicfumes. PA13 Min Typ
2 Fulltemprange 10 30 20 12 Fulltemprange 50 10 12 Fulltemprange 50 200 3 Fulltemprange VS-5 74 VS-3 100 * * 30 30 500
SPECIFICATIONS
Parameter
INPUT OFFSETVOLTAGE,initial OFFSETVOLTAGEvs.temp OFFSETVOLTAGEvs.supply OFFSETVOLTAGEvs.power BIASCURRENT,initial BIASCURRENT,vs.temp BIASCURRENT,vs.supply OFFSETCURRENT,initial OFFSETCURRENT,vs.temp INPUTIMPEDANCE,DC INPUTCAPACITANCE COMMONMODEVOLTAGE RANGE(Note4) 6 65 200 1 * * * 10 * * 5 * * * * * 10 20 * 4 40 * mV V/C V/V V/W nA pA/C pA/V nA pA/C M pF V dB
Test Conditions2,5
PA13A Max Min Typ Max Units
COMMONMODEREJECTION, Fulltemprange, DC VCM=VS-6V

PA13U
Product Innovation From
PA13 * PA13A
PA13 Min Typ
110 96 108 4 13 20 20 * *
Parameter
GAIN OPENLOOPGAIN@10Hz OPENLOOPGAIN@10Hz
Test Conditions2,5
1Kload Fulltemprange, 8load
PA13A Max Min Typ
* * * * *
Max
Units
dB dB MHz kHz
GAINBANDWIDTHPRODUCT 8load @1MHz POWERBANDWIDTH PHASEMARGIN,AV=+4 OUTPUT VOLTAGESWING(Note4) VOLTAGESWING(Note4) VOLTAGESWING(Note4) CURRENT,peak SETTLINGTIMEto0.1% SLEWRATE CAPACITIVELOAD CAPACITIVELOAD POWER SUPPLY VOLTAGE CURRENT,quiescent THERMAL RESISTANCE,AC, junctiontocase(Note5) RESISTANCE,DC, junctiontocase RESISTANCE,DC, junctiontoair TC=-55to +125C,F> 60Hz TC=-55to +125C TC=-55to +125C -25 Fulltemprange 10 Fulltemprange, AV=4 Fulltemprange, AV>10 2Vstep 2.5 PA13=10A, PA13A=15A IO=5A Fulltemprange, IO=80mA VS-6 VS-5 VS-5 10 8load Fulltemprange, 8load
* * * 15 2 4 1.5 SOA * * * * *
V V V A S V/S nF
40 25 0.6
45 50 0.7
*
* * *
* * *
V mA C/W
0.9 30
1.1
* *
*
C/W C/W
TEMPERATURERANGE,case Meetsfullrange specification
+85
*
*
C
NOTES: 1. (AllMin/MaxcharacteristicsandspecificationsareguaranteedovertheSpecifiedOperatingConditions.Typicalperformancecharacteristicsandspecificationsarederivedfrommeasurementstaken attypicalsupplyvoltagesandTC=25C). 2. Longtermoperationatthemaximumjunctiontemperaturewillresultinreducedproductlife.Derate powerdissipationtoachievehighMTTF. * ThespecificationofPA13AisidenticaltothespecificationforPA13intheapplicablecolumntothe left 3. Thepowersupplyvoltageforalltestsis40,unlessotherwisenotedasatestcondition.
PA13U

3
PA13 * PA13A

Product Innovation From
4. +VSand-VSdenotethepositiveandnegativesupplyrailrespectively.TotalVSismeasuredfrom+VS to-VS. 5. Ratingappliesiftheoutputcurrentalternatesbetweenbothoutputtransistorsataratefasterthan 60Hz. 6. Fulltemperaturerangespecificationsareguaranteedbutnot100%tested.
NotallvendorsusethesamemethodtoratethepowerhandlingcapabilityofaPowerOpAmp.APEXratestheinternal dissipation, which is consistent with rating methods used by transistormanufacturersandgivesconservativeresults.Ratingdeliveredpowerishighlyapplicationdependentandthereforecanbemisleading.Forexample,the135WinternaldissipationratingofthePA13couldbeexpressedasanoutput rating of 260W for audio (sine wave) or as 440W if using a singleendedDCload.Pleasenotethatallvendorsratemaximumpowerusinganinfiniteheatsink. APEXhaseliminatedthetendencyofclassA/Boutputstages toward thermal runaway and thus has vastly increased amplifier reliability. This feature, not found in most other Power OpAmps,waspioneeredbyAPEXin1981usingthermistors whichassureanegativetemperaturecoefficientinthequiescentcurrent.Thereliabilitybenefitsofthisaddedcircuitryfar outweightheslightincreaseincomponentcount.
POWER RATING
TYPICAL APPLICATION
THERMAL STAbILITY

PA13U
Product Innovation From
PA13 * PA13A
PleasereadApplicationNote1"GeneralOperatingConsiderations"whichcoversstability,supplies,heatsinking, mounting,currentlimit,SOAinterpretation,andspecificationinterpretation.Visitwww.apexmicrotech.comfordesigntoolsthathelpautomatetaskssuchascalculationsforstability,internalpowerdissipation,currentlimit;heat sinkselection;Apex'scompleteApplicationNoteslibrary;TechnicalSeminarWorkbook;andEvaluationKits. Theoutputstageofmostpoweramplifiershasthreedistinct limitations: 1. Thecurrenthandlingcapabilityofthetransistorgeometry andthewirebonds. 2. Thesecondbreakdowneffectwhichoccurswheneverthe simultaneous collector current and collector-emitter voltageexceedsspecifiedlimits. 3. Thejunctiontemperatureoftheoutputtransistors. TheSOAcurvescombinetheeffectofalllimitsforthisPower OpAmp.Foragivenapplication,thedirectionandmagnitude oftheoutputcurrentshouldbecalculatedormeasuredand checkedagainsttheSOAcurves.Thisissimpleforresistive loads but more complex for reactive and EMF generating loads.However,thefollowingguidelinesmaysaveextensiveanalyticalefforts.
GENERAL
SAFE OPERATING AREA (SOA)
PA13U

PA13 * PA13A
Product Innovation From
1. Capacitiveanddynamic*inductiveloadsuptothefollowingmaximumaresafewiththecurrentlimitssetas specified. VS 50V 40V 35V 30V 25V 20V 15V CAPACITIVE LOAD ILIM=5A ILIM=10A 200F 500F 2.0mF 7.0mF 25mF 60mF 150mF 125F 350F 850F 2.5mF 10mF 20mF 60mF INDUCTIVE LOAD ILIM=5A ILIM=10A 5mH 15mH 50mH 150mH 500mH 1,000mH 2,500mH 2.0mH 3.0mH 5.0mH 10mH 20mH 30mH 50mH
*Iftheinductiveloadisdrivennearsteadystateconditions,allowingtheoutputvoltagetodropmorethan12.5VbelowthesupplyrailwithILIM=10Aor27VbelowthesupplyrailwithILIM=5Awhiletheamplifieriscurrentlimiting, theinductormustbecapacitivelycoupledorthecurrentlimitmustbeloweredtomeetSOAcriteria. 2. TheamplifiercanhandleanyEMFgeneratingorreactiveloadandshortcircuitstothesupplyrailorcommonif thecurrentlimitsaresetasfollowsatTC=25C: VS 45V 40V 35V 30V 25V 20V 15V SHORT TO VS C, L, OR EMF LOAD .43A .65A 1.0A 1.7A 2.7A 3.4A 4.5A SHORT TO COMMON 3.0A 3.4A 3.9A 4.5A 5.4A 6.7A 9.0A
Thesesimplifiedlimitsmaybeexceededwithfurtheranalysisusingtheoperatingconditionsforaspecificapplication. RefertoApplicationNote9,"CurrentLimiting",fordetailsofbothfixedandfoldovercurrentlimitoperation.Visitthe Apexwebsiteatwww.cirrus.comforacopyofPower_design.exewhichplotscurrentlimitsvs.steadystateSOA. Bewarethatcurrentlimitshouldbethoughtofasa20%functioninitiallyandvariesabout2:1overtherangeof -55Cto125C. Forfixedcurrentlimit,leavepin4openanduseequations1and2.
RCL = ICL = 0.65 ICL 0.65 RCL
CURRENT LIMITING

(1) (2)
Where: ICListhecurrentlimitinamperes. RCListhecurrentlimitresistorinohms.

PA13U
Product Innovation From
PA13 * PA13A
Forcertainapplications,foldovercurrentlimitaddsaslopetothecurrentlimitwhichallowsmorepowertobedeliveredtotheloadwithoutviolatingtheSOA.Formaximumfoldoverslope,groundpin4anduseequations3and4.
ICL = RCL = 0.65 + (VO * 0.014) RCL 0.65 + (VO * 0.014) ICL

(3) (4)
Where: VOistheoutputvoltageinvolts. Mostdesignersstartwitheitherequation1tosetRCLforthedesiredcurrentat0vout,orwithequation4tosetRCLat themaximumoutputvoltage.Equation3shouldthenbeusedtoplottheresultingfoldoverlimitsontheSOAgraph. Ifequation3resultsinanegativecurrentlimit,foldoverslopemustbereduced.Thiscanhappenwhentheoutput voltageistheoppositepolarityofthesupplyconductingthecurrent. Inapplicationswhereareducedfoldoverslopeisdesired,thiscanbeachievedbyaddingaresistor(RFO)between pin4andground.Useequations4and5withthisnewresistorinthecircuit.
0.65 + VO * 0.14 10.14 + RFO RCL VO * 0.14 10.14 + RFO ICL
ICL =
(5)
0.65 +
RCL =
(6)
Where: RFOisinKohms.
CONTACTING CIRRUS LOGIC SUPPORT
ForallApexPrecisionPowerproductquestionsandinquiries,calltollfree800-546-2739inNorthAmerica. Forinquiriesviaemail,pleasecontacttucson.support@cirrus.com. InternationalcustomerscanalsorequestsupportbycontactingtheirlocalCirrusLogicSalesRepresentative. Tofindtheonenearesttoyou,gotowww.cirrus.com
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PA13U

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