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P r o d u c t IIn n o v a t i o n FFr room nnova m
SA60 SA60
The SA60 is a pulse width modulation amplifier that cansupply10Acontinuouscurrenttotheload.Thefull bridge amplifier can be operated over a wide range ofsupplyvoltages.Allofthedrive/controlcircuitryfor the lowside and highside switches are internal to the hybrid. The PWM circuitry is internal as well, leaving theusertoonlyprovideananalogsignalforthemotor speed/direction,oraudiosignalforswitchmodeaudio amplification.TheinternalPWMfrequencycanbeprogrammedbyanexternalintegratorcapacitor.Alternatively,theusermayprovideanexternalTTL-compatible PWMsignalforsimultaneousamplitudeanddirection controlforfourquadrantmode.
H-Bridge Motor Driver/Amplifiers
LOWCOSTCOMPLETEH-BRIDGE SELF-CONTAINEDSMARTLOWSIDE/ HIGHSIDEDRIVECIRCUITRY WIDESUPPLYRANGE:UPTO80V 10ACONTINUOUSOUTPUT ISOLATEDCASEALLOWSDIRECT HEATSINKING FOURQUADRANTOPERATION,TORQUE CONTROLCAPABILITY INTERNAL/PROGRAMMABLEPWM FREQUENCYGENERATION
FEATURES
DESCRIPTION
APPLICATIONS
BRUSHTYPEMOTORCONTROL CLASSDSWITCHMODEAMPLIFIER REACTIVELOADS MAGNETICCOILS(MRI) ACTIVEMAGNETICBEARING VIBRATIONCANCELLING
BLOCK DIAGRAM
SA60U
http://www.cirrus.com
Copyright (c) Cirrus Logic, Inc. 2008
(All Rights Reserved)
AUG2008 APEX - SA60REVK
SA60
P r o d u c t I n n o v a t i o nF r o m
.ChARACTERISTICSANDSPECIFICATIONS ABSOLutE MAXIMuM RAtInGS
Parameter
SUPPLYVOLTAGE,+VS(Note4) OUTPUTCURRENT,peak LOGICSUPPLYVOLTAGE,VCC POWERDISSIPATION,internal(Note3) TEMPERATURE,pinsolder,10smax. TEMPERATURE,junction(Note2) TEMPERATURERANGE,storage OPERATINGTEMPERATURERANGE,case -40 -25
Symbol
Min
Max
80 15 16 156 260 150 85 85
Units
V A V W C C C C
CAUTION
TheSA60isconstructedfromMOSFETtransistors.ESDhandlingproceduresmustbeobserved. Theexposedsubstratecontainsberyllia(BeO).Donotcrush,machine,orsubjecttotemperatures inexcessof850Ctoavoidgeneratingtoxicfumes. Parameter TestConditions
VCC=12V 1/2VCC 1/3VCC 2/3VCC 0 2.7 45 2.7 0 IDS=10A +VS=80A 10 t=100msec CF=270pF 15 45 90 +VSCurrent=LoadCurrent 9.5 VCC=12VDC Switching,noload,VS=50V 12 28 5 80 15 36 1.7 91 0.8 5.0 250 VCC 0.8 2.5 0.45 VDC VDC VDC VDC VDC KHz VDC VDC VDC % A A KHz nS VDC VDC mA mA
SPECIFICATIONS
Min Typ Max Units
INPUT ANALOGINPUTVOLTAGES A,BOUT=50%DutyCycle AOUT=100%DutyCycleHigh BOUT=100%DutyCycleHigh PWMINPUT PWMPULSELOWVOLTAGE PWMPULSEHIGHVOLTAGE PWMFREQUENCY DISABLEON DISABLEOFF OUTPUT VDS(ON)VOLTAGE,eachMOSFET TOTALRON,bothMOSFETs EFFICIENCY,10AOUTPUT CURRENT,continuous CURRENT,peak SWITCHINGFREQUENCY DEADTIME POWERSUPPLY +VSVOLTAGE(Note4) VCCVOLTAGE VCCCURRENT +VSCURRENT
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SA60U
P r o d u c t I n n o v a t i o nF r o m
SA60
TestConditions Min Typ Max
1.6 30 -25 +85
Parameter
tHERMAL(Note3) RESISTANCE,junctiontocase RESISTANCE,junctiontoair TEMPERATURERANGE,case
Units
C/W C/W C
Fulltemperaturerange, foreachtransistor Fulltemperaturerange
NOTES: 1. (AllMin/MaxcharacteristicsandspecificationsareguaranteedovertheSpecifiedOperatingConditions.Typicalperformancecharacteristicsandspecificationsarederivedfrommeasurementstaken attypicalsupplyvoltagesandTC=25C,VCC=12VDC). 2. Longtermoperationatthemaximumjunctiontemperaturewillresultinreducedproductlife.Derate powerdissipationtoachievehighMTTF. 3. Eachofthetwoactiveoutputtransistorscandissipate78W. 4. Derateto70VbelowTC=+25C.
SA60U

SA60
P r o d u c t I n n o v a t i o nF r o m
EXTERNALCONNECTIONS
FormedLeadsAvailable SeepackagestyleEE
2-pinPowerSIP PACKAGE STYLEDP
Awidevarietyofloadscanbedrivenineitherthevoltage mode or the current mode. The most common applicationsusethreeexternalblocks:alowpassfilterconvertingpulsewidthdatatoananalogoutput,adifferenceamplifiertomonitorvoltageorcurrentandanerroramplifier. Filterinductorsmustbesuitableforsquarewavesatthe switchingfrequency(laminatedsteelisgenerallynotacceptable). Filter capacitors must be low ESR and rated fortheexpectedripplecurrent.Adifferenceamplifierwith gainoflessthanonetranslatesthedifferentialoutputvoltagetoasinglefeedbackvoltage.Dashedlineconnections andahighergaindifferenceamplifierwouldbeusedforcurrentcontrol.Theerroramplifierintegratesthedifference betweentheinputandfeedbackvoltagestoclosetheloop.
TYPICALAPPLICATION

SA60U
P r o d u c t I n n o v a t i o nF r o m
SA60
PleasereadApplicationNote30on"PWMBasics".RefertoApplicationNote1"GeneralOperatingConsiderations" for helpful information regarding power supplies, heat sinking and mounting. Visit www.apexmicrotech.com for designtoolsthathelpautomatepwmfilterdesign;heatsinkselection;Apex'scompleteApplicationNoteslibrary; TechnicalSeminarWorkbook;andEvaluationKits. TheSA60containsaninternalPWMoscillatorwhosefrequencyisdeterminedbyanexternalcapacitorconnected betweenpin1andpin2.Maximumfrequencyis125kHz.TheusermayalsodisregardtheinternalPWMoscillator andsupplytheSA60withanexternalTTLpulsegeneratorupto250KHZ. VCC-isthelowvoltagesupplyforpoweringinternallogicanddriversforthelowsideandhighsideMOSFETS.The suppliesforthehighsidedriversarederivedfromthisvoltage. VS-isthehighervoltageH-bridgesupply.TheMOSFETSobtaintheoutputcurrentfromthissupplypin.Thevoltage onthispinislimitedto+80VbythedriveIC.TheMOSFETSareratedat100volts. ISENSEA&B-Thesearetiedtopowergnddirectlyorthroughsenseresistors. ANALOGGND-isthereferencefortheinternalPWMoscillator.Connectthispintopin6.ConnectlowsideofVcc supplyandanyothersupplyusedtogenerateanaloginputsignalstoANALOGGND. ANALOGINPUT-isananaloginputforcontrollingthePWMpulsewidthofthebridge.AvoltagehigherthanVcc/2 willproducegreaterthan50%dutycyclepulsesoutofBOUT.AvoltagelowerthanVcc/2willproducegreater than50%dutycyclepulsesoutofAOUT.Ifusinginthedigitalmode,biasthispointat1/2thelogichighlevel. DISABLE-Istheconnectionfordisablingall4outputswitches.DISABLEhighoverridesallotherinputs.When takenlow,everythingfunctionsnormally.AninternalpulluptoVccwillkeepDISABLEhighifpinleftopen. PWM InPut-IstheTTLcompatibledigitalinputforcontrollingthePWMpulsewidthofthebridge.Adutycycle greaterthan50%willproducegreaterthan50%dutycyclepulsesoutoftheAout.Adutycyclelessthan50% willproducegreaterthan50%dutycyclefromtheBout.Foranaloginputs,theintegrationcapacitorforthe internalclockmustbeconnectedbetweenthispinandanalogground.Theinternalswitchingfrequencyisprogrammableupto125kHzbyselectionoftheintegrationcapacitor.Theformulais:
GENERAL
PWM OSCILLAtOR - IntERnAL OR EXtERnAL
PINDESCRIPTION
BYPASSING
Adequatebypassingofthepowersuppliesisrequiredforproperoperation.Failuretodosocancauseerraticand low efficiency operation as well as excessive ringing at the outputs.The Vssupply should be bypassed with at leasta1FceramiccapacitorinparallelwithanotherlowESRcapacitorofatleast10Fperampofoutputcurrent. Capacitortypesratedforswitchingapplicationsaretheonlytypesthatshouldbeconsidered.The1Fceramic capacitormustbephysicallyconnecteddirectlytotheVsandPOWERGNDpins.Evenoneinchofleadlengthwill causeexcessiveringingattheoutputs.Thisisduetotheveryfastswitchingtimesandtheinductanceofthelead connection.ThebypassingrequirementsoftheVccsupplyarelessstringent,butstillnecessary.A.1Fto.47F ceramiccapacitorconnecteddirectlytotheVccandANALOGGNDpinswillsuffice. ThedesignerneedstoappreciatethattheSA60combinesinonecircuitbothhighspeedhighpowerswitchingand lowlevelanalogsignals.Certainlayoutrulesofthumbmustbeconsideredwhenacircuitboardlayoutisdesigned usingtheSA60: 1. Bypassingofthepowersuppliesiscritical.Capacitorsmustbeconnecteddirectlytothepowersupplypinswith veryshortleadlengths(wellunder1inch).Ceramicchipcapacitorsarebest. 2. ConnectANALOGGNDtoPOWERGNDwithaconductorhavingnointermediateconnections.ConnectallVs powersupply,filterandloadrelatedgroundconnectionstoPOWERGNDkeepingtheseconductorsseparate
PCBLAYOUT
SA60U

SA60
P r o d u c t I n n o v a t i o nF r o m
untilreachingpin6.ConnectallVccpowersupplyandinputsignalrelatedgroundconnectionstoANALOG GNDkeepingconductorsseparateuntilreachingpin1.Donotallowgroundloopstoformbymakingadditional groundconnectionsatthelowsideofthephysicalpowersupplies.Ifgroundplaneisuseddonotallowmore than1mAtoflowthroughit. 3. Bewareofcapacitivecouplingbetweenoutputconnectionsandsignalinputsthroughtheparasiticcapacitance betweenlayersinmultilayerPCBdesigns. 4. Donotrunsmallsignaltracesbetweenthepinsoftheoutputsection(pins8-12).
CURRENTSENSE
Therearetwoloadcurrentsensingpins,ISENSEAandISENSEB.ThetwopinscanbeshortedtoPOWERGND inthevoltagemodeconnectionbutbothmustbeusedinthecurrentmodeconnection.Itisrecommendedthat RSENSEresistorsbenon-inductive.LoadcurrentflowsintheISENSEpins.TheSA60hasnointernalcurrent limit. AnRCnetworkofa100pFCapacitorandaoneohmresistorisrequiredasshownintheexternalconnectiondiagramonpage1.Thisnetworkassuresproperoperationundervariousloads.Minimalpowerisdissipatedinthe resistor.
TRANSIENTSUPPRESSION
CONTACTINGCIRRUSLOGICSUPPORT
ForallApexPrecisionPowerproductquestionsandinquiries,calltollfree800-546-2739inNorthAmerica. Forinquiriesviaemail,pleasecontacttucson.support@cirrus.com. InternationalcustomerscanalsorequestsupportbycontactingtheirlocalCirrusLogicSalesRepresentative. Tofindtheonenearesttoyou,gotowww.cirrus.com
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SA60U

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