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Technical Specification
PQ60025ETL35
48 V
Input
2.5 V
Output
35 A
Current
2250 V dc
Isolation
DC-DC Converter
Eighth-brick
ThePQ60025ETL35PowerQor(R)TeraEighth-brickconverter is a next-generation, board-mountable, isolated, fixed switchingfrequencydc-dcconverterthatusessynchronous rectificationtoachieveextremelyhighconversionefficiency. The power dissipated by the converter is so low that a heatsinkisnotrequired,whichsavescost,weight,height, and application effort. All of the power and control componentsaremountedtothemulti-layerPCBsubstrate with high-yield surface mount technology. Since the PowerQorconverterhasnoexplicitthermalinterfaces,itis extremelyreliable.RoHSCompliant(seepage13). Operational Features
* Highefficiencies,88%atfullratedloadcurrent * Deliversupto35Aofoutputcurrentwithminimalderating -noheatsinkrequired * Wideinputvoltagerange:35V-75V,with100V100ms inputvoltagetransientcapability * FixedfrequencyswitchingprovidespredictableEMI performance * Nominimumloadrequirementmeansnopreload resistorsrequired
PQ60025ETL35Module
Protection Features
* Inputunder-voltagelockoutdisablesconverteratlowinput voltageconditions * Outputcurrentlimitandshortcircuitprotectionprotects converterandloadfrompermanentdamageand consequenthazardousconditions * Activebackbiaslimitpreventsdamagetoconverterfrom externalloadinducedpre-bias * Outputover-voltageprotectionprotectsloadfrom damagingvoltages * Thermalshutdownprotectsconverterfromabnormal environmentalconditions
Mechanical Features
* IndustrystandardEighth-brickpin-outconfiguration * Standardsize:0.90"x2.3"(22.9x58.4mm) * Totalheightonly0.320"(8.13mm),permitsbetterairflow andsmallercardpitch * Totalweight:0.85oz(24g) * Flangedpinsdesignedtopermitsurfacemountsoldering (avoidwavesolder)usingFPiPtechnique
Safety Features
* 2250V,30MWinput-to-outputisolation * UL60950-1recognized(US&Canada),basicinsulation rating * TUVcertifiedtoEN60950-1 * Meets72/23/EECand93/68/EECdirectiveswhichfacilitates CEMarkinginuser'sendproduct * BoardandplasticcomponentsmeetUL94V-0standard * RoHScompliant(seelastpage)
Doc.# 005-2ET625F Rev. B 5/28/08 Page 1
Control Features
* On/Offcontrolreferencedtoinputside(positiveand negativelogicoptionsareavailable) * Remotesensefortheoutputvoltagecompensatesfor outputdistributiondrops * Outputvoltagetrimpermitscustomvoltagesand voltagemargining
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Technical Specification
MECHANICALDIAGRAM
(58.4) (50.8)
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
2.30
2.00
(11.43)
0.450
0.14
(3.6)
0.300
(7.62)
0.15
(3.8)
Top View
0.150
(3.81)
1 2 3
(15.24)
8 7 6 5 4
0.900+0.022
(22.86+0.55)
0.600
0.300
(7.62) (15.24)
0.320+0.015
(8.13+0.38)
0.600
OverallHeight
(3.68) SeeNote3
0.145
0.016+0.015
(0.41+0.38)
Side View
Lowest Component LoadBoard FlangedPin SeeNote10
BottomSideClearance
1)Pins1-3,5-7are0.040"(1.02mm)diameterwith0.080"(2.03mm) diameterstandoffshoulders. 2)Pins4and8are0.062"(1.57mm)diameterwith0.100"(2.54mm) diameterstandoffshoulders. 3)Recommendedpinlengthis0.03"(0.76mm)greaterthanthePCB thickness.Otherpinlengthsavailable. 4)AllPins:Material-CopperAlloy;Finish-MatteTinoverNickelplate 5)Undimensionedcomponentsshownareforvisualreferenceonly. 6)Weight: 0.85oz.(24g)typical 7)Alldimensionsininches(mm) Tolerances: x.xx+/-0.02in.(x.x+/-0.5mm) x.xxx+/-0.010in.(x.xx+/-0.25mm) 8)Workmanship:MeetsorexceedscurrentIPC-A-610CClassII 9)UL/TUVstandardsrequireaclearancegreaterthan0.04" (1.02mm)betweeninputandoutputforBasicinsulation.This issueshouldbeconsideredifanycoppertracesareonthetopside oftheuser'sboard.Notethattheferritecoreshownatleftabove isconsideredpartoftheinput/primarycircuitandthatthetwo ferritecoresshownattherightaboveareconsideredpartofthe output/secondarycircuit. 10)Theflangedpinsaredesignedtopermitsurfacemountsoldering (allowingtoavoidthewavesolderingprocess)throughtheuseofthe flangedpin-in-pastetechnique.
NOTES
PINDESIGNATIONS
Pin No.
1 2 3 4 5 6 7 8
Notes: 1. SENSE(-)shouldbeconnectedtoVout(-)eitherremotelyoratthe converter. 2. LeaveTRIMpinopenfornominaloutputvoltage. 3. SENSE(+)shouldbeconnectedtoVout(+)eitherremotelyoratthe converter.
Name
Vin(+) ON/OFF Vin(-) Vout(-) SENSE(-) TRIM SENSE(+) Vout(+)
Function
Positiveinputvoltage TTLinputtoturnconverter onandoff,referencedto Vin(-)withinternalpullup Negativeinputvoltage Negativeoutputvoltage Negativeremotesense 1 Outputvoltagetrim 2 Positiveremotesense 3 Positiveoutputvoltage
Product # PQ60025ETL35
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Page 2
Technical Specification
PQ60025ETL35 Electrical Characteristics
ABSOLUTE MAXIMUM RATINGS InputVoltage Non-Operating Operating 35 OperatingTransientProtection IsolationVoltage InputtoOutput OperatingTemperature -40 StorageTemperature -55 VoltageatON/OFFinputpin -2 INPUT CHARACTERISTICS OperatingInputVoltageRange 35 InputUnder-VoltageLockout Turn-OnVoltageThreshold 31.5 Turn-OffVoltageThreshold 29.6 LockoutVoltageHysteresis 1.9 MaximumInputCurrent No-LoadInputCurrent 0 DisabledInputCurrent InrushCurrentTransientRating ResponsetoInputTransient InputReflectedRippleCurrent InputTerminalRippleCurrent RecommendedInputFuse InputFilterComponentValues(L\C) RecommendedExternalInputCapacitance OUTPUT CHARACTERISTICS OutputVoltageSetPoint 2.475 OutputVoltageRegulation OverLine OverLoad OverTemperature TotalOutputVoltageRange 2.43 OutputVoltageRippleandNoise1 Peak-to-Peak RMS OperatingOutputCurrentRange 0 OutputDCCurrent-LimitInception 40 OutputDCCurrent-LimitShutdownVoltage Back-DriveCurrentLimitwhileEnabled Back-DriveCurrentLimitwhileDisabled MaximumOutputCapacitanceElectrolytic MinimumOutputCapacitance MaximumOutputCapacitanceCeramic DYNAMIC CHARACTERISTICS InputVoltageRippleRejection OutputVoltageduringLoadCurrentTransient ForaStepChangeinOutputCurrent(0.1A/s) ForaStepChangeinOutputCurrent(0.3A/s) SettlingTime Turn-OnTransient Turn-OnTime 6 Start-UpInhibitTime 9 RestartInhibitTime 190 OutputVoltageOvershoot EFFICIENCY 100%Load 50%Load TEMPERATURE LIMITS FOR POWER DERATING CURVES SemiconductorJunctionTemperature BoardTemperature TransformerTemperature
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
TA=25C,airflowrate=300LFM,VIN=48VDCunlessotherwisenoted;fulloperatingtemperaturerangeis-40Cto+100Cambient temperaturewithappropriatepowerderating.Specificationssubjecttochangewithoutnotice.
Parameter
Min.
Typ.
48 32.6 30.6 2.0 46 6 7.5 1.9 75 47 2.500 +0.1\2.5 +0.2\5.0 +15 2.500 20 7 44 1.5 12 10 70 100 100 80 9 12 200 0 88 90
Max.
100 75 100 2250 100 125 18 75 33.7 31.6 2.1 3.0 75 10 0.01 20 1.0\3.3 2.525 +38 2.57 50 50 35 48 50 33 5 12 17 210 125 125 125
Units Notes & Conditions
V V V Vdc C C V V V V V A mA mA A 2s mV mA mA A H\F F V %\mV %\mV mV V mV mV A A V A mA mF mF dB mV mV s ms ms ms % % % C C C Continuous Continuous 100mstransient,squarewave BasicInsulation,PollutionDegree2
100%Load,35Vin,nominalVout
1000V/msinputtransient RMSthru10Hinductor;Figures13&15 RMS;Figures13&14 Fastblowexternalfuserecommended Internalvalues;seeFigureE TypicalESR0.1-0.2;seeFigure13
Oversample,line,load,temperature&life 20MHzbandwidth;Figures13&16 FullLoad;seeFigures13&16 FullLoad;seeFigures13&16 Subjecttothermalderating;Figures5-8 OutputVoltage10%Low Negativecurrentdrawnfromoutput Negativecurrentdrawnfromoutput 2.5Voutat35AResistiveLoad Notapplicable 2.5Voutat35AResistiveLoad 120Hz;Figure20 50%to75%to50%Ioutmax;Figure11 50%to75%to50%Ioutmax;Figure12 Towithin1%Voutnom Fullload,Vout=90%nom.;Figures9&10 -40Cto+125C;FigureF -40Cto+125C;FigureF Noloadcapacitance,Iout=0A Figures1-4 Figures1-4 Packageratedto150C ULratedmaxoperatingtemp130C SeeFigures5-8forderatingcurves
Note 1:Outputvoltageripplecanexceedmaximumspecificationduringstartupwhenoutputvoltageislessthan1.2V.Additionaloutputcapacitancewillmitigatethis startupripplebehavior.Forapplicationsrequiringreducedoutputvoltagerippleandnoise,consultSynQorapplicationssupport(e-mail:support@synqor.com) Note 2:Highervaluesofisolationcapacitancecanbeaddedexternaltothemodule.
Product # PQ60025ETL35
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Doc.# 005-2ET625F Rev. B
5/28/08
Page 3
Technical Specification
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
PQ60025ETL35 ELECTRICAL CHARACTERISTICS (Continued)
TA=25C,airflowrate=300LFM,VIN=48VDCunlessotherwisenoted;fulloperatingtemperaturerangeis-40Cto+100C ambienttemperaturewithappropriatepowerderating.Specificationssubjecttochangewithoutnotice.
ISOLATION CHARACTERISTICS IsolationVoltage(dielectricstrength) IsolationResistance IsolationCapacitance2 FEATURE CHARACTERISTICS SwitchingFrequency ON/OFFControl(OptionP) Off-StateVoltage On-StateVoltage ON/OFFControl(OptionN) Off-StateVoltage On-StateVoltage ON/OFFControl(EitherOption) Pull-UpVoltage Pull-UpResistance OutputVoltageTrimRange OutputVoltageRemoteSenseRange OutputOver-VoltageProtection Over-TemperatureShutdown Over-TemperatureShutdownRestartHysteresis
RELIABILITY CHARACTERISTICS
Parameter
Min.
317 -2 2.4 2.4 -2 -20 120
Typ.
2250 30 3300 333 10 148 120 10 2.42 2.27
Max.
350 0.8 18 18 0.8 5 +10 +10 160
Units Notes & Conditions
V M pF kHz V V V V V k % % % C C
FiguresA&B MeasuredacrossPins8&4;FigureC MeasuredacrossPins8&4 Overfulltemprange;%ofnominalVout AveragePCBTemperature
CalculatedMTBF(Telcordia)TR-NWT-000332 CalculatedMTBF(MIL-217)MIL-HDBK-217F FieldDemonstratedMTBF
106Hrs. 80%load,300LFM,40oCTa 106Hrs. 80%load,300LFM,40oCTa 106Hrs. Seeourwebsiteforlatestvalues
Note 1:Outputvoltageripplecanexceedmaximumspecificationduringstartupwhenoutputvoltageislessthan1.2V.Additionaloutputcapacitancewillmitigatethis startupripplebehavior.Forapplicationsrequiringreducedoutputvoltagerippleandnoise,consultSynQorapplicationssupport(e-mail:support@synqor.com) Note 2:Highervaluesofisolationcapacitancecanbeaddedexternaltothemodule.
STANDARDSCOMPLIANCE
Parameter P

STANDARDS COMPLIANCE
Notes
File#E194341,Basicinsulation,PollutionDegree2 CertifiedbyTUV Testonentireassembly;board&plasticcomponentsUL94V-0compliant ESDtest,8kV-NP,15kVair-NP(NormalPerformance) Section7-electricalsafety,Section9-bonding/grounding
UL/cUL60950-1 EN60950-1 72/23/EEC 93/68/EEC NeedleFlameTest(IEC695-2-2) IEC61000-4-2 GR-1089-CORE Telcordia(Bellcore)GR-513
* Anexternalinputfusemustalwaysbeusedtomeetthesesafetyrequirements.ContactSynQorforofficialsafety certificatesonnewreleasesordownloadfromtheSynQorwebsite.
QUALIFICATIONTESTING
Parameter P

QUALIFICATION TESTING
# Units
32 5 5 10 5 5 5 15pins
Test Conditions
95%ratedVinandload,unitsatderatingpoint,1000hours 10-55Hzsweep,0.060"totalexcursion,1min./sweep,120sweepsfor3axis 100gminimum,2dropsinxandyaxis,1dropinzaxis -40Cto100C,unittemp.ramp15C/min.,500cycles Toperating=mintomax,Vin=mintomax,fullload,100cycles Tmin-10CtoTmax+10C,5Csteps,Vin=mintomax,0-105%load 85C,85%RH,1000hours,2minutesonand6hoursoff MIL-STD-883,method2003
LifeTest Vibration MechanicalShock TemperatureCycling Power/ThermalCycling DesignMarginality Humidity Solderability
* ExtensivecharacterizationtestingofallSynQorproductsandmanufacturingprocessesisperformedtoensurethatwesupply robust,reliableproduct.Contactthefactoryforofficialproductfamilyqualificationdocuments.
Product # PQ60025ETL35
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Doc.# 005-2ET625F Rev. B
5/28/08
Page 4
Technical Specification
95 93
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
90
92
Efficiency (%)
Efficiency (%)
85
91
80
90
75 35 Vin 48 Vin 75 Vin 0 5 10 15 20 25 30 35
89 25 C 40 C 55 C
70
88
65
87 100 200 300 400
Load Current (A)
Airflow (LFM)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 2: Efficiency at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25C, 40C, and 55C (nominal input voltage).
7
14 12
Power Dissipation (W)
6 10 8 6 4 2 0 0 5 10 15 20 25 30 35 35 Vin 48 Vin 75 Vin 3 100 200 300 400
Efficiency (%)
5
4
25 C 40 C 55 C
Load Current (A)
Airflow (LFM)
Figure 3: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 4: Power dissipation at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25C, 40C, and 55C (nominal input voltage).
40 35 30 25
Iout (A)
20 15 400 LFM (2.0 m/s) 10 5 0 0 25 40 55 70 85 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
Ambient Air Temperature (C)
Figure 5: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from pin 3 to pin 1(nominal input voltage).
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Figure 6: Thermal plot of converter at 35 amp load current (87.5W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter from 3 to pin 1 (nominal input voltage).
Doc.# 005-2ET625F Rev. B 5/28/08 Page 5
Technical Specification
40 35 30 25
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
Iout (A)
20 15 400 LFM (2.0 m/s) 10 5 0 0 25 40 55 70 85 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
Ambient Air Temperature (C)
Figure 7: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing across the converter from pin input to output (nominal input voltage).
Figure 8: Thermal plot of converter at 35 amp load current (87.5W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter from input to output (nominal input voltage).
Figure 9: Turn-on transient at full load (resistive load) (4 ms/div). Load cap: 10uF, 100 m ESR tantalum capacitor and 1uF ceramic capacitor. Input voltage pre-applied. Ch 1: Vout (1V/div), Ch 2: ON/OFF input (5V/div).
Figure 10: Turn-on transient at zero load (4 ms/div). Load cap: 10uF, 100 m ESR tantalum capacitor and 1uF ceramic capacitor. Ch 1: Vout (1V/ div), Ch 2: ON/OFF input (5V/div).
Figure 11: Output voltage response to step-change in load current (50%-75%-50% of Iout(max); dI/dt = 0.1A/s). Load cap: 10F, 100 m ESR tantalum cap and 1F ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (10A/div).
Product # PQ60025ETL35 Phone 1-888-567-9596 www.synqor.com
Figure 12: Output voltage response to step-change in load current (50%-75%-50% of Iout(max): dI/dt = 0.3 A/s). Load cap: 10F, 100 m ESR tantalum cap and 1F ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (10A/div).
Doc.# 005-2ET625F Rev. B 5/28/08 Page 6
Technical Specification
See Fig. 15
source impedance
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
10 H
See Fig. 14 See Fig. 16
iS
VSOURCE
iC
dc-dc Converter 1 F
VOUT
15 F,
electrolytic capacitor
47 F, <1W ESR
ceramic 100mW ESR capacitor tantalum capacitor
Figure 13: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 14), Input Reflected Ripple Current (Figure 15) and Output Voltage Ripple (Figure 16).
Figure 14: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 10H source impedance and 47F electrolytic capacitor (100 mA/div). Bandwidth: 250MHz. See Figure 13.
Figure 15: Input reflected ripple current, is, through a 10 H source inductor, using a 47F electrolytic input capacitor (2mA/div). Bandwidth: 250MHz. See Figure 13.
Figure 16: Output voltage ripple at nominal input voltage and rated load current (20 mV/div). Load capacitance: 1F ceramic capacitor and 15F tantalum capacitor. Bandwidth: 20 MHz. See Figure 13.
12 11 10
Vout Trim-up (%)
9 8 7 6 5 4 3 2 40.0 39.5 39.0 38.5 38.0 37.5 37.0 36.6 36.0 35.5 35.0 +80 C +25 C -40 C
Input Voltage (V)
Figure 17: Output voltage response to step-change in input voltage (50V to 100V in 8S), at 17.5A load current. Load cap: 15F 100mW ESR tantalum capacitor and 1uF ceramic cap. Ch 1: Vout (50mV/div), Ch 2: Vin (20V/div).
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Figure 18: Maximum trim up vs. input voltage at different temperatures Vin=35.0~40.0 V.
Doc.# 005-2ET625F Rev. B
5/28/08
Page 7
Technical Specification
1 0 -10
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
0.1
Forward Transmission (dB)
Output Impedance (ohms)
-20 -30 -40 -50 -60 -70 -80 -90 -100 35 Vin 48 Vin 75 Vin 10 100 1,000 10,000 100,000
0.01
0.001
35 Vin 48 Vin 75 Vin
0.0001 10 100 1,000 10,000 100,000
Hz
Hz
Figure 19: Magnitude of incremental output impedance (Zout = Vout/Iout) for minimum, nominal, and maximum input voltage at full rated power.
Figure 20: Magnitude of incremental forward transmission (FT = Vout/Vin) for minimum, nominal, and maximum input voltage at full rated power.
5
100
-5
Reverse Transmission (dB)
-15
Input Impedance (ohms)
10
-25
-35 35 Vin -45 48 Vin 75 Vin -55 10 100 1,000 10,000 100,000
1 35 Vin 48 Vin 75 Vin 0.1 10 100 1,000 10,000 100,000
Hz
Hz
Figure 21: Magnitude of incremental reverse transmission (RT = Iin/Iout) for minimum, nominal, and maximum input voltage at full rated power.
Figure 22: Magnitude of incremental input impedance (Zin = Vin/Iin) for minimum, nominal, and maximum input voltage at full rated power.
Figure 23: Output voltage vs. load current showing typical current limit curves and converter shutdown points.
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Technical Specification
BASICOPERATIONANDFEATURES
ThesinglestagepowerconverterswitchesatafixedfrequencyforpredictableEMIperformance.Rectificationof thetransformer'soutputisaccomplishedwithsynchronous rectifiers.Thesedevices,whichareMOSFETswithaverylow on-stateresistance,dissipatefarlessenergythanSchottky diodes.ThisistheprimaryreasonthatthePowerQorconverterhassuchhighefficiency,evenatverylowoutputvoltagesandveryhighoutputcurrents. Dissipationthroughouttheconverterissolowthatitdoes notrequireaheatsinkforoperation.Sinceaheatsinkisnot required,thePowerQorconverterdoesnotneedametal baseplateorpottingmaterialtohelpconductthedissipated energytotheheatsink.ThePowerQorconvertercanthusbe builtmoresimplyandreliablyusinghighyieldsurfacemount techniquesonaPCBsubstrate. ThePowerQorseriesofeighth-brick,quarter-brickandhalfbrickconvertersusestheindustrystandardfootprintand pin-outconfiguration.
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
In the positive logic version, the ON/OFF input is active high (meaning that a high turns the converter on). In the negative logicversion,theON/OFFsignalisactivelow(meaningthata lowturnstheconverteron).FigureAdetailsfivepossiblecircuits for driving the ON/OFF pin. Figure B is a detailed look of the internalON/OFFcircuitry. REMOTE SENSE(+) (Pins 7 and 5):TheSENSE(+)inputs correctforvoltagedropsalongtheconductorsthatconnect theconverter'soutputpinstotheload. Pin7shouldbeconnectedtoVout(+)andPin5shouldbe connectedtoVout(-)atthepointontheboardwhereregulationisdesired.Aremoteconnectionattheloadcanadjust foravoltagedroponlyaslargeasthatspecifiedinthis datasheet,thatis
[Vout(+)-Vout(-)]-[Vsense(+)-Vsense(-)]<
SenseRange%xVout
Pins7and5mustbeconnectedforproperregulationof theoutputvoltage.Iftheseconnectionsarenotmade,the converterwilldeliveranoutputvoltagethatisslightlyhigher thanitsspecifiedvalue. Note:theoutputover-voltageprotectioncircuitsensesthe voltageacrosstheoutput(pins8and4)todeterminewhen itshouldtrigger,notthevoltageacrosstheconverter'ssense leads(pins7and5).Therefore,theresistivedroponthe boardshouldbesmallenoughsothatoutputOVPdoesnot trigger,evenduringloadtransients.
CONTROLFEATURES
REMOTE ON/OFF (Pin 2):TheON/OFFinput,Pin2,permits theusertocontrolwhentheconverterisonoroff.Thisinputis referencedtothereturnterminaloftheinputbus,Vin(-).There aretwoversionsoftheconverterthatdifferbythesenseofthe logicusedfortheON/OFFinput.
ON/OFF
ON/OFF
ON/OFF
Vin(-) RemoteEnableCircuit
Vin(-)
Vin(-) 10k ON/OFF ON/OFF Vin(-) 50k
PositiveLogic NegativeLogic (PermanentlyEnabled) (PermanentlyEnabled) ON/OFF TTL/ CMOS 5V
5V
TTL
100pF
Vin(-) OpenCollectorEnableCircuit Figure A: Various circuits for driving the ON/OFF pin.
Vin(-) DirectLogicDrive Figure B: Internal ON/OFF pin circuitry
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Technical Specification
OUTPUT VOLTAGE TRIM (Pin 6):TheTRIMinputpermits theusertoadjusttheoutputvoltageacrossthesenseleads upordownaccordingtothetrimrangespecifications. Todecreasetheoutputvoltage,theusershouldconnect aresistorbetweenPin6andPin5(SENSE(-)input).Fora desireddecreaseofthenominaloutputvoltage,thevalueof theresistorshouldbe
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
Total DC Variation of Vout:Fortheconvertertomeetits fullspecifications,themaximumvariationoftheDCvalueof Vout,duetobothtrimmingandremoteloadvoltagedrops, shouldnotbegreaterthanthatspecifiedfortheoutputvoltagetrimrange.
PROTECTIONFEATURES
Input Under-Voltage Lockout: Theconverterisdesigned toturnoffwhentheinputvoltageistoolow,helpingavoid aninputsysteminstabilityproblem,describedinmoredetail intheapplicationnotetitled"InputSystemInstability".The lockoutcircuitryisacomparatorwithDChysteresis.When theinputvoltageisrising,itmustexceedthetypicalTurn-On VoltageThresholdvalue(listedonthespecificationpage) beforetheconverterwillturnon.Oncetheconverterison, theinputvoltagemustfallbelowthetypicalTurn-OffVoltage Thresholdvaluebeforetheconverterwillturnoff. Output Current Limit: Oncetheoutputcurrentreaches thecurrent-limitinceptionpoint,theconverterwilldecrease theoutputvoltageastheoutputcurrentincreases.However, oncetheimpedanceoftheshortacrosstheoutputissmall enoughtomaketheoutputvoltagedropbelowthespecified OutputDCCurrent-LimitShutdownVoltage,theconverter turnsoff(seeFigure23). Theconverterthenentersa"hiccupmode"whereitrepeatedlyturnsonandoffata5Hz(nominal)frequencywitha 5%dutycycleuntiltheshortcircuitconditionisremoved. Thispreventsexcessiveheatingoftheconverterortheload board. Output Over-Voltage Limit: Ifthevoltageacrossthe outputpinsexceedstheOutputOver-VoltageProtection threshold,theconverterwillimmediatelystopswitching.This preventsdamagetotheloadcircuitdueto1)excessiveseriesresistanceinoutputcurrentpathfromconverteroutput pinstosensepoint,2)areleaseofashort-circuitcondition, or3)areleaseofacurrentlimitcondition.Loadcapacitance determinesexactlyhowhightheoutputvoltagewillrisein responsetotheseconditions.After200mstheconverterwill automaticallyrestart. Over-Temperature Shutdown: Atemperaturesensoron theconvertersensestheaveragetemperatureofthemodule.Thethermalshutdowncircuitisdesignedtoturnthe converteroffwhenthetemperatureatthesensedlocation reachestheOver-TemperatureShutdownvalue.Itwillallow theconvertertoturnonagainwhenthetemperatureofthe sensedlocationfallsbytheamountoftheOver-Temperature ShutdownRestartHysteresisvalue.
Rtrim-down= 511 -10.22(kW) D%
()
where
D% =
Vnominal-Vdesired x100% Vnominal
Toincreasetheoutputvoltage,theusershouldconnecta resistorbetweenPin6andPin7(SENSE(+)input).Fora desiredincreaseofthenominaloutputvoltage,thevalueof theresistorshouldbe
Rtrim-up =
where
(
5.11VOUT(100+D%) 511 _
1.225D%
D%
_10.22 (kW)
)
VOUT=NominalOutputVoltage FigureCgraphstherelationshipbetweenthetrimresistor valueandRtrim-upandRtrim-down,showingthetotalrange theoutputvoltagecanbetrimmedupordown.
10,000.0
Trim Resistance (kOhms)
1,000.0
100.0
10.0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
% Increase in Vout
% Decrease in Vout
Figure C: Trim Graph for 2.5Vout module
Note: theTRIMfeaturedoesnotaffectthevoltageatwhich theoutputover-voltageprotectioncircuitistriggered.Trimmingtheoutputvoltagetoohighmaycausetheover-voltage protectioncircuittoengage,particularlyduringtransients. Itisnotnecessaryfortheusertoaddcapacitanceatthe Trimpin.Thenodeisinternallybypassedtoeliminatenoise.
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Technical Specification
APPLICATIONCONSIDERATIONS
Input System Instability:Thisconditioncanoccurbecauseanydc-dcconverterappearsincrementallyasanegativeresistanceload.Adetailedapplicationnotetitled"Input SystemInstability"isavailableontheSynQorwebsitewhich providesanunderstandingofwhythisinstabilityarises,and showsthepreferredsolutionforcorrectingit. Application Circuits: FigureDbelowprovidesatypical circuitdiagramwhichdetailstheinputfilteringandvoltage trimming.
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
Input Filtering and External Capacitance: FigureE belowprovidesadiagramshowingtheinternalinputfilter components.Thisfilterdramaticallyreducesinputterminal ripplecurrent,whichotherwisecouldexceedtheratingof anexternalinputelectrolyticcapacitor.Therecommended externalinputcapacitanceisspecifiedinthe"InputCharacteristics"section.Moredetailedinformationisavailable intheapplicationnotetitled"EMICharacteristics"onthe SynQorwebsite.
Vin(+) External Input Filter
Electrolytic Capacitor
Vout(+) Vsense(+) Rtrim-up
or
Vin
47F
ON/OFF
Trim
Vsense(_) Vin(_) Vout(_)
Rtrim-down
Cload
Iload
Figure D: Typical application circuit (negative logic unit, permanently enabled).
L
Vin(+) C Vin(_)
Figure E: Internal Input Filter Diagram (component values listed on the specifications page).
Product # PQ60025ETL35
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2ET625F Rev. B
5/28/08
Page 11
Technical Specification
Startup/Restart Inhibit Period:TheRestartInhibit Periodensuresthattheconverterwillremainoffforapproximately200msonceitisshutdown.Whenanoutputshortis present,thisgeneratesa5Hz"hiccupmode,"whichprevents theconverterfromoverheating.Inall,therearefiveways thattheconvertercanbeshutdownthatinitiateaRestart InhibitPeriod: *InputUnder-VoltageLockout *OutputOver-VoltageProtection *OverTemperatureShutdown *CurrentLimit *TurnedoffbytheON/OFFinput FigureFshowsturn-onscenarios,whereaRestartInhibit Periodisinitiatedatt1,t2,andt3: AStartupInhibitPeriodisinitiatedwhentheinputvoltageis broughtupfromzerovoltageduringinitialstartup,beginning astheinputvoltagereachesapproximately10V.Attheend oftheStartupInhibitPeriod(typically10ms),iftheON/OFF pinhasbeenactiveforatleast1ms,andtheinputvoltageis abovetheUnder-VoltageLockoutthreshold,theoutputturns onwiththeTypicalTurn-OnTime.Thisisshownattimet0.
Input: Output: Current: Package:
35V - 75 V 2.5 V 35 A Eighth-brick
Attimet1,theinputvoltagefallsbelowtheInputUnderVoltageLockoutthreshold.Thisdisablestheunitandinitiates aRestartInhibitPeriod.DuringtheRestartInhibitPeriod,if theinputvoltageagainexceedstheUVLOthreshold,theunit cannotbeenabledagainuntiltheRestartInhibitPeriodhas elapsed.Oncethisoccurs,theoutputturnsonwiththeTypicalTurn-OnTime. Attimet2,theON/OFFpindisablestheunitandinitiatesa RestartInhibitPeriod.DuringtheRestartInhibitPeriod,ifthe ON/OFFpinisagainactivated,theunitcannotbeenabled againuntiltheRestartInhibitPeriodhaselapsed.Oncethis occurs,theoutputturnsonwiththeTypicalTurn-OnTime. WhentheON/OFFpingoeshighaftert3,andtheRestart InhibitPeriodhaselapsed,theoutputturnsonapproximately 1.6msaftertheON/OFFpinisactivated,withtheTypical Turn-OnTime. IftheUnder-VoltageLockoutthresholdhasnotbeensatisfiedattheendofeitherInhibitPeriod,theunitwillremain disableduntiltheinputvoltageexceedstheUVLOthreshold. Oncethisoccurs,theoutputturnsonwiththeTypicalTurnOnTime. IftheON/OFFpinisactivatedaftereitherInhibitPeriodhas elapsed,theoutputwillturnonapproximately1.6msafter theON/OFFpinisactivated,withtheTypicalTurn-OnTime.
Vin
Under-Voltage LockoutTurnOnThreshold
ON/OFF
(poslogic) ON
OFF ON
OFF
ON
Vout
(typicalstart-up inhibitperiod)
10ms
(typicalrestart inhibitperiod)
(typicalturnontime)
15ms
200ms
200ms
200ms
t0
t1
t2
t3
t
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ60025ETL35 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2ET625F Rev. B 5/28/08 Page 12
Technical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor's PowerQor dc-dc converters follows the format shown in the example below.
P Q 60 0 25 E T L 3 5 N N S - G 6/6 RoHS Options Output Current Thermal Design Performance Level Package Size Output Voltage Input Voltage Product Family
(see Ordering Information)
Input: Output: Current: Package:
ORDERING INFORMATION
35V - 75 V 2.5 V 35 A Eighth-brick
The tables below show the valid model numbers and ordering options for converters in this product family. When ordering SynQor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options. A "-G" suffix indicates the product is 6/6 RoHS compliant.
Output MaxOutput ModelNumber InputVoltage Voltage Current PQ60018ETL45xyz-G 35-75V 1.8V 45A PQ60025ETL35xyz-G 35-75V 2.5V 35A PQ60033ETL30xyz-G 35-75V 3.3V 30A
The following option choices must be included in place of the xyz spaces in the model numbers listed above.
Options Description: x y z Enable Logic P-Positive N-Negative Pin Length K-0.110" N-0.145" R-0.180" Y-0.250" Feature Set S-Standard
The first 12 characters comprise the base part number and the last 3 characters indicate available options. Although there are no default values for enable logic and pin length, the most common options are negative logic and 0.145" pins. These part numbers are more likely to be readily available in stock for evaluation and prototype quantities. A "-G" suffix indicates the product is 6/6 RoHS compliant.
Application Notes
A variety of application notes and technical white papers can be downloaded in pdf format from our website.
RoHS Compliance:TheEUledRoHS(Restrictionof HazardousSubstances)DirectivebanstheuseofLead, Cadmium,HexavalentChromium,Mercury,Polybrominated Biphenyls(PBB),andPolybrominatedDiphenylEther(PBDE) inElectricalandElectronicEquipment.ThisSynQorproduct isavailableas6/6RoHScompliant.Formoreinformation pleaserefertoSynQor'sRoHSaddendumavailableatour RoHSCompliance/LeadFreeInitiativewebpageore-mail usatrohs@synqor.com.
PATENTS
SynQor holds the following patents, one or more of which might apply to this product: 5,999,417 6,594,159 6,927,987 7,119,524 6,222,742 6,731,520 7,050,309 7,269,034 6,545,890 6,894,468 7,072,190 7,272,021 6,577,109 6,896,526 7,085,146 7,272,023
Contact SynQor for further information:

Phone: TollFree: Fax: E-mail: Web: Address:
978-849-0600 888-567-9596 978-849-0602 power@synqor.com www.synqor.com 155SwansonRoad Boxborough,MA01719 USA
Phone 1-888-567-9596
Warranty SynQoroffersathree(3)yearlimitedwarranty.Completewarranty informationislistedonourwebsiteorisavailableuponrequestfrom SynQor. Information furnished by SynQor is believed to be accurate and reliable.However,noresponsibilityisassumedbySynQorforitsuse, nor for any infringements of patents or other rights of third parties whichmayresultfromitsuse.Nolicenseisgrantedbyimplicationor otherwiseunderanypatentorpatentrightsofSynQor.
Product # PQ60025ETL35
www.synqor.com
Doc.# 005-2ET625F Rev. B
5/28/08
Page 13

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