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Technical Specification
PQ60260HTB10
48Vin
Input
26Vout
Output
250W
Power
2000Vdc
Isolation
Half-brick
DC/DC Converter
The PQ60260HTB10 PowerQor(R) Tera converter is a nextgeneration, board-mountable, isolated, fixed switching frequency dc/dc converter that uses synchronous rectification to achieve extremely high conversion efficiency. The power dissipated by the converter is so low that a heatsink is not required. However, this unit provides a baseplate for clamshell applications and optional heatsinking in severe thermal environments. The Tera series converters offer the maximum usable current output for any standard "half-brick" module. The Tera units also feature active current sharing for N+1 and parallel applications. RoHS Compliant see last page. Operational Features
*Ultra-highefficiency,92%atfullratedloadcurrent *Deliversupto250Wattsofoutputpowerwithminimalderating-heatsinkoptional *Wideinputvoltagerange:35V-75V,with100V 100msinputvoltagetransientcapability *FixedfrequencyswitchingprovidespredictableEMI performance
PQ60260HTB10 Module
Control Features
* On/Offcontrolreferencedtoinputside(positiveand negativelogicoptionsareavailable) * Remotesensefortheoutputvoltagecompensatesfor outputdistributiondrops * Outputvoltagetrimpermitscustomvoltagesandvoltage margining
Protection Features Mechanical Features
*Industrystandardhalf-brickpin-outconfiguration *Industrystandardsize:2.3"x2.4"(58.4x61.0mm) *Totalheight0.50"(12.7mm) *Baseplateallowsheatsinkattachmentor"clamshell" configuration *Totalweight:4.3oz(122g) * Inputunder-voltagelockoutdisablesconverteratlow inputvoltageconditions * Outputcurrentlimitandshortcircuitprotection * Activebackbiaslimitpreventsdamagetoconverter fromexternalloadinducedpre-bias * Outputover-voltageprotection * Thermalshutdown
Safety Features
*2000V,30MWinput-to-outputisolation *UL/cUL60950-1recognized(US&Canada),basic insulationrating *TUVcertifiedtoEN60950-1 *Meets72/23/EECand93/68/EECdirectives *MeetsUL94V-0flammabilityrequirements
Product # PQ60260HTB10 Phone 1-888-567-9596
Optional Features (full-feature)
* ActivecurrentshareforN+1andparallelapplications * ExternalClockSynchronizationpinforbetterEMIcharacteristics * StartupSynchronizationpinformoreconsistentstart-up sequence * ORingFETdrivesupplyforefficientORingprotection
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 1
Technical Specification
MECHANICAL DIAGRAM
0.700
(17.78)
Input: Output: Current: Package:
2.40
(61.0)
35-75 V 26 V 9.6 A (250W) Half-brick
2.00
(50.8)
1.400
(35.56)
0.20
(5.1)
1.000
(25.40)
0.20
(5.1)
0.400
(10.16)
Side View
0.50
(12.7) M3 Threaded Standoff Ref.
1.90
(48.3)
Top View
1.90
(48.3)
2.30
(58.4)
.065 +.020/-.023
(1.65 +.51/-.58)
0.19
(4.8)
Bottom side Clearance
0.12 typ.
(3.0) See Note 4
0.400
(10.16)
M3 Threaded Standoff 4 Places See Note 5
0.600
(15.24)
0.800
(20.32)
Pin Farside Typical
1.000 0.50
(12.7) (25.40)
1.400
(35.56)
NOTES
1)Pins1-4,6-8,A,Bare0.040"(1.02mm)diameterwith 0.080"(2.03mm)diameterstandoffshoulders. 2)Pins5and9are0.080"(2.03mm)diameterwith0.125" (3.18mm)diameterstandoffshoulders. 3)Pins3,A&BonlyincludedinFull-Featuremodels. 4)Pinlengthshowncorrespondstopinwith0.145"extension. Otherpinextensionlengthsavailable.Recommendedpin lengthis0.03"(0.76mm)greaterthanthePCBthickness. 5)Appliedtorqueperscrewshouldnotexceed3in-lb(.33Nm) 6)Baseplateflatnesstoleranceis0.004"(0.10mm)TIRforsurface. 7)AllPins:Material-CopperAlloy Finish(5/6RoHS)-Tin/LeadoverNickelplate Finish(6/6RoHS)-TinoverNickelplate 8)Undimensionedcomponentsareshownforvisualreferenceonly. 9)Alldimensionsininches(mm) Tolerances:x.xx+/-0.02in.(x.x+/-0.5mm) x.xxx+/-0.010in.(x.xx+/-0.25mm) 10)Weight:4.3oz(122g)typical 11)Workmanship:MeetsorexceedsIPC-A-610CClassII
PINDESIGNATIONS
PinNo. Name
1 2 3 4 5 6 7 8 9 A B Vin(+) ON/OFF I share Vin(-) Vout(-) SENSE(-) TRIM SENSE(+) Vout(+) Clock Sync Start Sync
Function
Positiveinputvoltage TTLinputtoturnconverter onandoff,referencedto Vin(-),withinternalpullup. Single wire parallel signal Negativeinputvoltage Negativeoutputvoltage Returnremotesense Outputvoltagetrim Positiveremotesense Positiveoutputvoltage Clock synchronization Startup synchronization
Pins in Italics Shaded text are Optional
Doc.# 005-2HTB26F Rev. H 10/10/08 Page 2
Product # PQ60260HTB10
Phone 1-888-567-9596
www.synqor.com
Technical Specification
PQ60260HTB10ELECTRICALCHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Input: Output: Current: Package:
35-75 V 26 V 9.6 A (250W) Half-brick
TA=25C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40C to +100C ambient temperaturewithappropriatepowerderating.Specificationssubjecttochangewithoutnotice.
Min.
-40 -55 -2 -15 35 30.6 28.2 2.3 25.6 25.12 0 10.2 0.1 0 180
Typ.
48 32.5 30.1 2.4 115 2 1.5 20 1.6\4\3.3 47 26.0
Max.
100 80 100 2000 100 125 18 18 75 34.4 32.1 2.5 8.5 150 5 0.01 20 26.4
Units
V V V V C C V V V
Notes & Conditions
Continuous Continuous 100mstransient,squarewave Basicinsulation,Pollutiondegree2

INPUT CHARACTERISTICS
InputVoltage Non-Operating Operating OperatingTransientProtection IsolationVoltage(inputtooutput) OperatingTemperature StorageTemperature VoltageatON/OFFinputpin VoltageatClockSyncpin OperatingInputVoltageRange InputUnder-VoltageLockout Turn-OnVoltageThreshold Turn-OffVoltageThreshold LockoutVoltageHysteresis MaximumInputCurrent No-LoadInputCurrent DisabledInputCurrent InrushCurrentTransientRating ResponsetoInputTransient InputReflectedRippleCurrent RecommendedInputFuse InputFilterComponentValues(C1\L\C2) RecommendedExternalInputCapacitance
AppliestoFullFeatureoptiononly
OUTPUT CHARACTERISTICS
V V V A 100%Load,35Vin mA mA A 2s V 1000V/msinputtransient;Figure16 mA RMSthru10Hinductor;Figures11&13 A Fastblowexternalfuserecommended F\H\F Internalvalues;seeFigureE F TypicalESR0.1-0.2W;seeFigure11 V

DYNAMIC CHARACTERISTICS
OutputVoltageSetPoint OutputVoltageRegulation OverLine OverLoad OverTemperature TotalOutputVoltageRange OutputVoltageRippleandNoise1 Peak-to-Peak RMS OperatingOutputCurrentRange OutputDCCurrent-LimitInception OutputDCCurrent-LimitShutdownVoltage Short-CircuitCurrent-Limit CurrentShareAccuracy(2unitsparalleled) Back-DriveCurrentLimitwhileEnabled Back-DriveCurrentLimitwhileDisabled MaximumOutputCapacitance InputVoltageRippleRejection OutputVoltageduringLoadCurrentTransient ForaStepChangeinOutputCurrent(0.1A/s) ForaStepChangeinOutputCurrent(5A/s) SettlingTime Turn-OnTransient Turn-OnTime Start-UpInhibitTime OutputVoltageOvershoot 100%Load 50%Load
+0.1\30 +0.15\40 %\mV +0.1\30 +0.15\40 %\mV +150 +300 mV 26.98 V 50 90 mV 15 30 mV 9.6 A 11.0 12.0 A 2.0 V 20 A +2 +5 % 0.2 0.6 A 10 50 mA 5,000 F 60 750 500 300 25 200 0 92 92.5 2000 30 3300 40 240 100 dB mV mV s ms ms % % % C V MW pF
Oversample,line,load,temperature&life 20MHzbandwidth;Figures11&14 FullLoad;seeFigures11&14 FullLoad;seeFigures11&14 OutputVoltage10%Low;Figure6 %ofratedoutputcurrent Negativecurrentdrawnfromoutput Negativecurrentdrawnfromoutput 26Voutat9.6AResistiveLoad 120Hz;Figure18 50%to75%to50%Ioutmax;Figure9 50%to75%to50%Ioutmax;Figure10 Towithin1%Voutnom Fullload,Vout=90%nom.;Figures7&8 -40Cto+125C;FigureA 5,000Floadcapacitance,Iout=0A Figures1-4 Figures1-4 Figures5
EFFICIENCY
TEMPERATURE LIMITS FOR POWER DERATING CURVES ISOLATION CHARACTERISTICS
BaseplateTemperature
IsolationVoltage(dielectricstrength) IsolationResistance IsolationCapacitance2
Note1:Forapplicationsrequiringreducedoutputvoltagerippleandnoise,consultSynQorapplicationssupport(e-mail:support@synqor.com) Note2:Highervaluesofisolationcapacitancecanbeaddedexternaltothemodule.
Product # PQ60260HTB10
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 3
Technical Specification
ELECTRICALCHARACTERISTICS(Continued)
Parameter P

FEATURE CHARACTERISTICS
Input: Output: Current: Package:
35-75 V 26 V 9.6 A (250W) Half-brick
Min.
270 -2 2.7 2.7 -2 -20
Typ.
300 Vin/6 42 117 120 10 TBD 2.2 1.3
Max.
340 0.8 18 18 0.8 15 +10 +10
Units
kHz V V V V V kW % % % C C
6
Notes & Conditions
RegulationstageandIsolationstage
RELIABILITY 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 LoadCurrentScaleFactor CalculatedMTBF(Telcordia) CalculatedMTBF(MIL-217) FieldDemonstratedMTBF
FiguresA&B MeasuredacrossPins9&5;FigureC MeasuredacrossPins9&5 Overfulltemprange;%ofnominalVout AveragePCBTemperature SeeAppNote:OutputLoadCurrentCalc.
10 Hrs. TR-NWT-000332;80%load,300LFM,40oCTa 106Hrs. MIL-HDBK-217F;80%load,300LFM,40oCTa 106Hrs. Seeourwebsitefordetails
STANDARDSCOMPLIANCE
Parameter P

Notes
File#E194341,Basicinsulation&pollutiondegree2 CertifiedbyTUV Testonentireassembly;board&plasticcomponentsUL94V-0compliant ESDtest,8kV-NP,15kVair-NP(NormalPerformance) Section7-electricalsafety,Section9-bonding/grounding
STANDARDS COMPLIANCE
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

# Units
32 5 5 10 5 5 5 15pins
Test Conditions
10-55Hzsweep,0.060"totalexcursion,1min./sweep,120sweepsfor3axis
QUALIFICATION TESTING
LifeTest Vibration MechanicalShock TemperatureCycling Power/ThermalCycling DesignMarginality Humidity Solderability
95%ratedVinandload,unitsatderatingpoint,1000hours
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
*ExtensivecharacterizationtestingofallSynQorproductsandmanufacturingprocessesisperformedtoensurethatwesupply robust,reliableproduct.Contactthefactoryforofficialproductfamilyqualificationdocuments.
Product # PQ60260HTB10
Phone 1-888-567-9596
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 4
Technical Specification
100 95 90 Efficiency (%)
Efficiency (%) 94 93 92 91 90 89 88 87 86
Input: Output: Current: Package:
35-75 V 26 V 9.6 A (250W) Half-brick
85 80 75 70 65 60 0 1 2 3 4 5 6 Load Current (A) 7 8 9 10
36 Vin 48 Vin 75 Vin
25 C 40 C 55 C
0
100
200
300
400
500
Air Flow (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 and nominal input voltage.
16 15
25
20
14
Power Dissipation (W)
15
10
Power Dissipation (W)
13 12 11 10 9 8
36 Vin
5
48 Vin 75 Vin
25 C 40 C 55 C
0 0 1 2 3 4 5 6 Load Current (A) 7 8 9 10
0
100
200 300 Air Flow (LFM)
400
500
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).
27
10 9 8
24 Output Voltage (V)
7 Iout (A) 6 5 4 3 2 1 0 0 25 40 55 Ambient Air Temperature (oC) 70 85
21
18
400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 0 LFM (0 m/s)
15
12
36 V 48 V 75 V
9 0 2 4 6 8 Load Current (A) 10 12 14
Figure 5: Maximum output power derating curves (no heatsink) vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing from pin 3 to pin 1 (nominal input voltage).
Product # PQ60260HTB10 Phone 1-888-567-9596
Figure 6: Output voltage vs. load current showing typical current limit curves and converter shutdown points.
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 5
Technical Specification
Input: Output: Current: Package:
35-75 V 26 V 9.6 A (250W) Half-brick
Figure 7: Turn-on transient at full load (resistive load) (10 ms/div). Input voltage pre-applied. Top Trace: Vout (10V/div). Bottom Trace: ON/OFF input (5V/div).
Figure 8: Turn-on transient at zero load (10 ms/div). Top Trace: Vout (10V/div). Bottom Trace: ON/OFF input (5V/div).
Figure 9: Output voltage response to step-change in load current (50%-75%50% of Iout(max); dI/dt = 0.1A/s). Load cap: 15F, 450 mW ESR tantalum cap and 1F ceramic cap. Top trace: Vout (500mV/div), Bottom trace: Iout (5A/div).
Figure 10: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 5A/s). Load cap: 480F, 15 mW ESR tantalum cap and 1F ceramic cap. Top trace: Vout (500mV/div), Bottom trace: Iout (5A/div).
See Fig. 13
source impedance
10H
See Fig. 12 See Fig. 14
iS
VSOURCE
iC
DC/DC Converter 1F
VOUT
15F,
electrolytic capacitor
47F, <1WESR
ceramic 450mWESR capacitor tantalum capacitor
Figure 11: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 12), Input Reflected Ripple Current (Figure 13) and Output Voltage Ripple (Figure 14).
Product # PQ60260HTB10 Phone 1-888-567-9596
Figure 12: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 10H source impedance and 47F electrolytic capacitor (500 mA/div). See Figure 11.
Doc.# 005-2HTB26F Rev. H 10/10/08 Page 6
www.synqor.com
Technical Specification
Input: Output: Current: Package:
35-75 V 26 V 9.6 A (250W) Half-brick
Figure 13: Input reflected ripple current, is, through a 10 H source inductor at nominal input voltage and rated load current (10 mA/div). See Figure 11.
Figure 14: 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 11.
Figure 15: Load current (5A/div) as a function of time when the converter attempts to turn on into a 10 mW short circuit. Top trace (2ms/ div) is an expansion of the on-time portion of the bottom trace.
Figure 16: Output voltage response to step-change in input voltage (1000V/ms). Ch1: Vin (20V/div), Ch2: Vout (1V/div).
Product # PQ60260HTB10
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 7
Technical Specification
10
-20 -30
Input: Output: Current: Package:
35-75 V 26 V 9.6 A (250W) Half-brick
1
Forward Transmission (dB) -40 -50 -60 -70 -80
Output Impedance (W)
0.1
0.01
0.001
36 Vin 48 Vin 75 Vin
35 Vin
-90 -100
48 Vin 75 Vin
10 100 1,000 Hz 10,000 100,000
0.0001 10 100 1,000 Hz 10,000 100,000
Figure 17: Magnitude of incremental output impedance (Zout = vout/ iout) for minimum, nominal, and maximum input voltage at full rated power.
20
Figure 18: Magnitude of incremental forward transmission (FT = vout/ vin) for minimum, nominal, and maximum input voltage at full rated power.
100
10 Reverse Transmission (dB)
Input Impedance (Ohmn)
0
10
-10
-20
1
-30
-40
35 Vin 48 Vin 75 Vin
0.1
36 Vin 48 Vin 75 Vin
-50 10 100 1,000 Hz 10,000 100,000
10
100
1,000 Hz
10,000
100,000
Figure 19: Magnitude of incremental reverse transmission (RT = iin/iout) for minimum, nominal, and maximum input voltage at full rated power.
Figure 20: Magnitude of incremental input impedance (Zin = vin/iin) for minimum, nominal, and maximum input voltage at full rated power.
Product # PQ60260HTB10
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 8
Technical Specification
BASICOPERATIONANDFEATURES
ThePowerQorseriesconverterusesatwo-stagepowerconversion topology.Thefirststageisabuck-converterthatkeepstheoutput voltage constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions of input/output isolation and voltage step-down to achieve the low outputvoltagerequired. Both the first stage and the second stage switch at a fixed frequencyforpredictableEMIperformance.Rectificationofthetransformer'soutputisaccomplishedwithsynchronousrectifiers.These devices,whichareMOSFETswithaverylowon-stateresistance, dissipatefarlessenergythanSchottkydiodes.Thisistheprimary reasonthatthePowerQorconverterhassuchhighefficiency,even atverylowoutputvoltagesandveryhighoutputcurrents. Dissipation throughout the converter is so low that it does not requireaheatsinkforoperation.Sinceaheatsinkisnotrequired, thePowerQorconverterdoesnotneedametalbaseplateorpottingmaterialtohelpconductthedissipatedenergytotheheatsink. ThePowerQorconvertercanthusbebuiltmoresimplyandreliably usinghighyieldsurfacemounttechniquesonaPCBsubstrate. The PowerQor series of half-brick, quarter-brick and eighth-brick convertersusestheindustrystandardfootprintandpin-outconfiguration.
Input: Output: Current: Package:
35-75 V 26 V 9.6 A (250W) Half-brick
In the positive logic version, the ON/OFF input is active high (meaningthatahighturnstheconverteron).Inthenegativelogic version, the ON/OFF signal is active low (meaning that a low turns the converter on). Figure A details five possible circuits for drivingtheON/OFFpin.FigureBisadetailedlookoftheinternal ON/OFFcircuitry. REMOTE SENSE(+) (Pins 8 and 6): The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter'soutputpinstotheload. Pin 8 should be connected to Vout(+) and Pin 6 should be connected to Vout(-) at the point on the board where regulation is desired.Aremoteconnectionattheloadcanadjustforavoltage droponlyaslargeasthatspecifiedinthisdatasheet,thatis
[Vout(+)-Vout(-)]-[Vsense(+)-Vsense(-)]<
SenseRange%xVout
Pins8and6mustbeconnectedforproperregulationoftheoutputvoltage.Iftheseconnectionsarenotmade,theconverterwill deliver an output voltage that is slightly higher than its specified value. Note:theoutputover-voltageprotectioncircuitsensesthevoltage acrosstheoutput(pins9and5)todeterminewhenitshouldtrigger,notthevoltageacrosstheconverter'ssenseleads(pins8and 6). Therefore, the resistive drop on the board should be small enough so that output OVP does not trigger, even during load transients. OUTPUT VOLTAGE TRIM (Pin 7):TheTRIMinputpermitsthe usertoadjusttheoutputvoltageacrossthesenseleadsupordown accordingtothetrimrangespecifications.
CONTROLFEATURES
REMOTE ON/OFF (Pin 2):TheON/OFFinput,Pin2,permits theusertocontrolwhentheconverterisonoroff.Thisinputisreferencedtothereturnterminaloftheinputbus,Vin(-).Thereare twoversionsoftheconverterthatdifferbythesenseofthelogic usedfortheON/OFFinput.
ON/OFF
ON/OFF
ON/OFF
Vin(_) RemoteEnableCircuit
Vin(_) NegativeLogic (PermanentlyEnabled) ON/OFF
TTL/ CMOS
Vin(_) PositiveLogic (PermanentlyEnabled)
Vin(+)
274k ON/OFF 50k
5V
5V ON/OFF
TTL
100pF 50k
Vin(_) OpenCollectorEnableCircuit
Vin(_) DirectLogicDrive
Vin(_)
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ60260HTB10 Phone 1-888-567-9596 www.synqor.com
Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2HTB26F Rev. H 10/10/08 Page 9
Technical Specification
Todecreasetheoutputvoltage,theusershouldconnectaresistor betweenPin7andPin6(SENSE(-)input).Foradesireddecreaseof thenominaloutputvoltage,thevalueoftheresistorshouldbe
Input: Output: Current: Package:
PROTECTIONFEATURES
35-75 V 26 V 9.6 A (250W) Half-brick
Rtrim-down=
where
100% -2 (kW) D
(
)
D% =
Vnominal-Vdesired x100% Vnominal
To increase the output voltage, the user should connect a resistor betweenPin7andPin8(SENSE(+)input).Foradesiredincreaseof thenominaloutputvoltage,thevalueoftheresistorshouldbe
Input Under-Voltage Lockout: The converter is designed to turnoffwhentheinputvoltageistoolow,helpingavoidaninput systeminstabilityproblem,describedinmoredetailintheapplication note titled "Input System Instability" on the SynQor website. ThelockoutcircuitryisacomparatorwithDChysteresis.Whenthe inputvoltageisrising,itmustexceedthetypicalTurn-OnVoltage Threshold value (listed on the specification page) before the converterwillturnon.Oncetheconverterison,theinputvoltagemust fallbelowthetypicalTurn-OffVoltageThresholdvaluebeforethe converterwillturnoff. Input Over-Voltage Shutdown: Available on PQ48 models only. The converter turns off when the input voltage is too high, allowing the converter to withstand an input voltage as high as 100Vwithoutdestruction.Theshutdowncircuitryisacomparator with DC hysteresis. When the input voltage exceeds the typical Input Over-Voltage Shutdown value, the converter will turn off. Oncetheconverterisoff,itwillturnbackonwhentheinputvoltage fallsbelowtheminimumInputOver-VoltageShutdownvalue. Output Current Limit:Themaximumcurrentlimitremainsconstant as the output voltage drops. However, once the impedance of the short across the output is small enough to make the output voltagedropbelowthespecifiedOutputDCCurrent-LimitShutdown Voltage,theconverterturnsoff. Theconverterthenentersa"hiccupmode"whereitrepeatedlyturns onandoffata5Hz(nominal)frequencywitha5%dutycycleuntil theshortcircuitconditionisremoved.Thispreventsexcessiveheatingoftheconverterortheloadboard. Output Over-Voltage Limit: If the voltage across the output pins exceeds the Output Over-Voltage Protection threshold, the converterwillimmediatelystopswitching.Thispreventsdamageto theloadcircuitdueto1)excessiveseriesresistanceinoutputcurrentpathfromconverteroutputpinstosensepoint,2)areleaseof ashort-circuitcondition,or3)areleaseofacurrentlimitcondition. Loadcapacitancedeterminesexactlyhowhightheoutputvoltage willriseinresponsetotheseconditions.After200mstheconverter willautomaticallyrestart. Over-Temperature Shutdown: A temperature sensor on the convertersensestheaveragetemperatureofthemodule.Thethermalshutdowncircuitisdesignedtoturntheconverteroffwhenthe temperature at the sensed location reaches the Over-Temperature Shutdownvalue.Itwillallowtheconvertertoturnonagainwhen the temperature of the sensed location falls by the amount of the Over-TemperatureShutdownRestartHysteresisvalue.
Rtrim-up=
Vnominal -2 xVDES+VNOM 1.225 VDES-VNOM
(
)
(kW)
FigureCgraphstherelationshipbetweenthetrimresistorvalueand Rtrim-upandRtrim-down,showingthetotalrangetheoutputvoltage canbetrimmedupordown.
100,000
10,000 Trim Resistance (kOhms)
1,000
100
10
1 0 2 4 6 8 10 12 14 16 18 20
% Increase in Vout
% Decrease in Vout
Figure C: Trim Graph for 26Vout module
Note:theTRIMfeaturedoesnotaffectthevoltageatwhichtheoutputover-voltageprotectioncircuitistriggered.Trimmingtheoutput voltage too high may cause the over-voltage protection circuit to engage,particularlyduringtransients. ItisnotnecessaryfortheusertoaddcapacitanceattheTrimpin. Thenodeisinternallybypassedtoeliminatenoise. Total DC Variation of Vout: For the converter to meet its full specifications,themaximumvariationoftheDCvalueofVout,due to both trimming and remote load voltage drops, should not be greaterthanthatspecifiedfortheoutputvoltagetrimrange.
Product # PQ60260HTB10
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 10
Technical Specification
APPLICATIONCONSIDERATIONS
Input System Instability: This condition can occur because any DC/DCconverterappearsincrementallyasanegativeresistanceload. Adetailedapplicationnotetitled"InputSystemInstability"isavailable ontheSynQorwebsitewhichprovidesanunderstandingofwhythis instabilityarises,andshowsthepreferredsolutionforcorrectingit. Application Circuits:FigureDbelowprovidesatypicalcircuit diagramwhichdetailstheinputfilteringandvoltagetrimming. Input Filtering and External Capacitance: Figure E below provides a diagram showing the internal input filter components. Thisfilterdramaticallyreducesinputterminalripplecurrent,which otherwisecouldexceedtheratingofanexternalelectrolyticinput capacitor.Therecommendedexternalinputcapacitanceisspecified in the Input Characteristics section on the Electrical Specifications page. More detailed information is available in the application notetitled"EMICharacteristics"ontheSynQorwebsite. Startup Inhibit Period: The Startup Inhibit Period ensures that the converter will remain off for approximately 200ms when it is shut down for any reason. When an output short is present, this generatesa5Hz"hiccupmode,"whichpreventstheconverterfrom overheating.Inall,therearesevenwaysthattheconvertercanbe shutdown,initiatingaStartupInhibitPeriod:
Input: Output: Current: Package:
*InputUnder-VoltageLockout
35-75 V 26 V 9.6 A (250W) Half-brick
*InputOver-VoltageShutdown(notpresentinQuarter-brick) *OutputOver-VoltageProtection *OverTemperatureShutdown *CurrentLimit *ShortCircuitProtection *TurnedoffbytheON/OFFinput Figure F shows three turn-on scenarios, where a Startup Inhibit Periodisinitiatedatt0,t1,andt2: Beforetimet0,whentheinputvoltageisbelowtheUVLthreshold, the unit is disabled by the Input Under-Voltage Lockout feature. When the input voltage rises above the UVLthreshold, the Input Under-Voltage Lockout is released, and a Startup Inhibit Period is initiated.Attheendofthisdelay,theON/OFFpinisevaluated, andsinceitisactive,theunitturnson. Attimet1,theunitisdisabledbytheON/OFFpin,anditcannotbe enabledagainuntiltheStartupInhibitPeriodhaselapsed. WhentheON/OFFpingoeshighaftert2,theStartupInhibitPeriod has elapsed, and the output turns on within the typical Turn-On Time.
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(+) C1 Vin(_) C2
Figure E: Internal Input Filter Diagram (component values listed on page 3).
Product # PQ60260HTB10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 11
Technical Specification
FULLFEATUREAPPLICATIONNOTES
This section provides some basic application information for the full-feature version of the PowerQor series converter. The pin-out configurationfortheseoptionalfeaturepinsisshownonpage2, and the part numbering format is shown on the last page of this specificationsheet. All units in this product family include back-drive protection to simplifytheuseofmultipleconvertersinaparallelorsequencing application. However, any voltage applied to the output of the convertershouldbekeptbelow120%oftheratedoutputvoltage oftheconverter. Inadditiontoback-driveprotection,theseunitsincludethefollowingfeatures(pins): Current Share (pin 3):Theactivecurrentsharefeatureallows forN+1andparallelapplications.Toachieveloadsharing,directly connect the I share pins of multiple units. The load current will shareequallyamongthemultipleunits(5%atfullratedcurrent). ItisimportantthattheVin(-)pinsofthesharingunitsbedirectlyconnectedandNOTplacedoutsideofanEMIfilterorotherimpedance path.ThevoltageattheISharepinwillrangefrom0to5volts(at fullratedcurrent),referencedtotheprimary-sideground,Vin(-). Start Sync (pin B):TheStartSynchronizationpinwillallowa moreconsistentstart-upsequence.Tooperatethisfeature,connect togethertheStart-Syncpinsofmultiplecurrent-sharingunits.Thiswill permitimmediatestart-upwithloadsgreaterthanthecurrentlimitof asingleunit.Withoutthisconnection,anysetofconvertersattemptingtoasynchronouslystart(orre-start)withaloadgreaterthanthe currentlimitofasingleunitwill"hiccup".This"hiccup"modewill
Input: Output: Current: Package:
35-75 V 26 V 9.6 A (250W) Half-brick
continueuntiloneconverterattemptsastartatthesametimeasthe minimumnumberofadditionalunitsnecessarytosustaintheload condition.Forexample,three50ampunitsstartingintoa90amp loadwouldrequiretwounitstosimultaneouslyattemptastart.The StartSyncconnectionsynchronizesthesestartingattemptsandprovidesamoreconsistentandreliablestart-upsequence.Fordetails aboutthe"hiccupmode"orrepeatedstartupattempts,pleasesee the"StartupInhibitPeriod"noteinthisTechnicalSpecification. Clock Sync (pin A): The External Clock Synchronization pin provides the ability for the user to control the EMI signature and synchronize sensitive circuitry to quiet periods in the converter operation.Withthisoption,theconvertercanbesynchronizedto an external clock signal whose frequency is greater than that of the free-running internal clock. However, substantially raising the converter'sfrequencywillreduceitsefficiency.Therefore,therecommendedfrequencyrangefortheexternalclocksynchronization signalappliedtothispinwouldbethelowestvaluepossiblewithout droppingbelowtheminimumfrequencylistedbelow:
340KHzforthe26Vunit
Thefollowingrequirementsshouldalsobemet:
* heexternalclocksignalshouldbereferencedtothe T negativeinputvoltage,Vin(-). * hehighlevelofthesignalshouldbebetween3.5Vand5.0V. T * helowlevelshouldbebetween-0.5Vand+1.2V. T * onotapplyaclocksignallowerthanthespecified D frequency.
Vin
Under-Voltage LockoutTurn-On Threshold
ON/OFF
(poslogic)
ON
OFF ON
OFF
ON 25ms(typical
Vout
(typicalstart-up inhibitperiod)
200ms
turnontime)
200ms
200ms
t0
t1
t2
t
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ60260HTB10 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HTB26F Rev. H 10/10/08 Page 12
Technical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor's dc-dc converters follows the format shown in the example below.
P Q 60 2 60 H T B 10 N N S 6/6RoHS Options(see
OrderingInformation)
Input: Output: Current: Package:
ORDERING INFORMATION
35-75 V 26 V 9.6 A (250W) Half-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.
OutputCurrent ThermalDesign PerformanceLevel PackageSize OutputVoltage InputVoltage ProductFamily
Model Number PQ60012HTB60xyz PQ60018HTB09xyz PQ60240HTB10xyz PQ60260HTB10xyz PQ60525HTB04xyz Input Voltage 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V Output Voltage 1.2 V 18 V 24 V 26 V 52.5 V Maximum Output Current 60 A 9.2 A 9.6 A 9.6 A 3.8 A
The first 12 characters comprise the base part number and the last 3 characters indicate available options. The "-G" suffix indicates 6/6 RoHS compliance.
The following options must be included in place of the x y z spaces in the model numbers listed above.
Options Description: x y z
Enable Logic
P - Positive N - Negative
Pin Style K - 0.110" N - 0.145" R - 0.180" Y - 0.250"
Feature Set
S - Standard F - Full Feature
Application Notes
A variety of application notes and technical white papers can be downloaded in pdf format from our website.
RoHS Compliance: The EU led RoHS (Restriction of Hazardous Substances) Directive bans the use of Lead, Cadmium, Hexavalent Chromium, Mercury, Polybrominated Biphenyls (PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical and Electronic Equipment. This SynQor product is 6/6 RoHS compliant. For more information please refer to SynQor's RoHS addendum available at our RoHS Compliance / Lead Free Initiative web page or e-mail us at rohs@synqor.com.
Not all combinations make valid part numbers, please contact SynQorforavailability.
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: Toll Free: Fax: E-mail: Web: Address:
978-849-0600 888-567-9596 978-849-0602 power@synqor.com www.synqor.com 155 Swanson Road Boxborough, MA 01719 USA
Phone 1-888-567-9596
Warranty SynQor offers a three (3) year limited warranty. Complete warranty information is listed on our website or is available upon request from SynQor. Information furnished by SynQor is believed to be accurate and reliable. However, no responsibility is assumed by SynQor for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SynQor.
Product # PQ60260HTB10
www.synqor.com
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 13

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