QPSERIES
MiniatureDC/DCConverters
5to500Vdc,Isolated,50WattRegulatedOutput
HighEfficiency,LowRipple
0°Cto+85°COperatingTemperature,BasePlate
Miniature-LowProfile(2.5"x1.55"x0.5")-PCBMountable
HighReliabilityDC-DCConverters


TheQPSeriesofMiniaturePowerDC/DCConvertersoperateover
wideinputvoltageranges(9-18Vdcand18-
36Vdc)whilemaintaining
tightoutputregulationandlowripple.
SafetyFeatures:Overtemperature,InputUnder/Overvoltage,Output
OvercurrentandShortCircuitProtection.
FEATURES:
InputVoltageRanges:9-18Vdcand18-36Vdc.Foradditional
voltagesconsultfactory.
OutputVoltage:5Vdcto500Vdc.11standardvoltages,custom
outputvoltagesarealsoavailable.
LineandLoadRegulation:from0.5%Vout
Page
1
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*
UnitsinQPSeriesalsofeatureRemoteShutdown,Trimcapability,
3Vref,ExternalBiasanddonotuseOptoCouplersinthefeed-back
loop.
FixedFrequencyoperationenablesparallelconnectionforhigher
powerrequirements.
QPSeriesunitsarefullyencapsulatedforruggedoperation.

APPLICATIONS:
Commercial,idustrialandmilitaryapplications,processcontrol,
distributedpower,testequipment,telecommunications.
Efficiency:Upto90%
LowRipple
InputUnder/OverVoltageProtection
OutputOvercurrentandShortCircuitProtection
OutputVoltageClamp:typ.120%Vout
ThermalShutdown
TrimCapability:+/-5%Vout
3Vrefoutputpin
RemoteShutdown
ExternalBiaspinforcapacitorchargingapplications
0°Cto+85°Cstandardoperatingbaseplatetemperature.
Expandedoperatingtemperaturealsoavailable
3000VrmsIn/OutIsolation
FullyEncapsulated
12QPSERIES
50W-SINGLEOUTPUT-9-18Vin
PICO
MODEL
INPUTVOLTAGE
RANGE
(V)
OUTPUT
VOLTAGE
(V)
OUTPUT
POWER
MAX.
(W)**
EFF.
(TYP.)
@
FL
(%)
REGULATION
(MAX) OUTPUT
VOLTAGE
RIPPLE
Pk-Pk,@FL
(mVpp)
OUTPUT
VOLTAGE
SETUP
TOL.
(%)
PRICE
(US$)
LINE
9-18Vin
(%)
LOAD***
10-100%
FL
(%)
12QP5.0 9-18 5 40 78 3 3 50 0.5 139.00
12QP12 9-18 12 40 85 1.5 2 40 0.5 139.00
12QP15 9-18 15 50 85 1.5 2 40 0.5 139.00
12QP24 9-18 24 50 85 1 1.5 20 0.5 139.00
12QP28 9-18 28 50 85 1 1.5 20 0.5 149.00
12QP48 9-18 48 50 85 1 1.5 30 0.5 159.00
12QP100 9-18 100 50 86 1 1.5 20 0.5 195.00
12QP200 9-18 200 50 85 1.5 2 150 0.5 245.00
12QP300*
9-18 300 40 87 1 1 100 0.5 295.00
Page
2
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*

12QP400*
9-18 400 40 87 1 1 200 0.5 325.00
12QP500*
9-18 500 40 86 1 1 200 0.5 350.00
*Fortheseunits,Poutmaxislinearlyderatedat6.7W/Vforinputvoltageslowerthan10.5V
**Properthermalmanagementrequired:BasePlateTemp.<85°C(SeeApplicationNotes)
***10%minimumloadrequiredatanytime
24QPSERIES
50W-SINGLEOUTPUT-18-36Vin
PICO
MODEL
INPUTVOLTAGE
RANGE
(V)
OUTPUT
VOLTAGE
(V)
OUTPUT
POWER
MAX.
(W)**
EFF.
(TYP.)
@
FL
(%)
REGULATION
(MAX) OUTPUT
VOLTAGE
RIPPLE
Pk-Pk,@FL
(mVpp)
OUTPUT
VOLTAGE
SETUP
TOL.
(%)
PRICE
(US$)
LINE
18-36Vin
(%)
LOAD***
10-100%
FL
(%)
24QP5.0 18-36 5 40 79 3 2 50 0.5 139.00
24QP12 18-36 12 40 88 1 1.5 40 0.5 139.00
24QP15 18-36 15 50 88 1 1.5 40 0.5 139.00
24QP24 18-36 24 50 87 1 1 20 0.5 139.00
24QP28 18-36 28 50 87 1 1 20 0.5 149.00
24QP48 18-36 48 50 87 1 1 30 0.5 159.00
24QP100 18-36 100 50 88 1 1 20 0.5 195.00
24QP200 18-36 200 50 87 1 1.5 150 0.5 245.00
24QP300*
18-36 300 40 90 0.5 1 100 0.5 295.00
24QP400*
18-36 400 40 89 0.5 0.5 200 0.5 325.00
24QP500*
18-36 500 40 89 1 1 200 0.5 350.00
*Fortheseunits,Poutmaxislinearlyderatedat3.3W/Vforinputvoltageslowerthan21V
**Properthermalmanagementrequired:BasePlateTemp.<85°C(SeeApplicationNotes)
Page
3
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*
ELECTRICALCHARACTERISTICS:
InputOV/UVProtection
ConverterFrequency:150kHztypical
ReferenceVoltage:3Vdc+/-0.2V,10mAmax.
CurrentLimitProtection:HiccupMode
OutputVoltageClamp:120%Vouttypical
OutputTrimmingRange:+/-5%max.

***10%minimumloadrequiredatanytime
12QPSeries24QPSeries
UVSHDN 7.1V 14.6V
UVRESTART 7.6V 15.6V
OVSHDN 20V 41V
OVRESTART 19.5V 40V
Rtrim
connectedbetween
Rtrim(kohm)calculation
foraspecified/\Vout(%)
TRIMUP TRIM(Pin#4)and-IN(Pin#1) (300//\Vout)-51
TRIMDOWN TRIM(Pin#4)andVREF(Pin#3) (425//\Vout)-51
Page
4
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*

FIG.2TrimUp/Downtypicalresistorvalues

RemoteShutdown:
ConverteristurnedoffwhenPin#2(SHDN)isclampedtoPin#1withinlessthan0.4V
 Rtrim(kohm)
/\Vout(%)1 2 3 5
TRIMUP 249 99 49 9
TRIMDN 374 162 91 33
Page
5
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*

ExternalBiasFunction
Ex.BVoltage=17...20Vdc;Ex.BCurrent=20mA(typical)

FIG.3NonIsolatedShutdown

Fig.4IsolatedShutdown
Page
6
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*
ExternalBiasshouldbeusedinCapacitorChargingapplications.TheQPunitwillnotstart-upunderashort-cuicuitconditionbecausethe
InternalBiasSupplycannotdeveloptherequiredstart-
upvoltage.Tochargeupalargecapacitor,anexternalbiasvoltageshouldbeusedonly
untiltheoutputvoltage,Vout,reached90-
95%ofitsnominalvalueandthereforetheinternalbiasvoltagehascomeupandisabletosustain
converteroperation.
NotethatduringExternalBiasoperation,outputoverloadandshortcircuitprotectionaredisabledandforthisreasonitishighly
recommended-asshownindiagram-todisabletheExternalBiassupplyafterVoutreachesitsnominalvalueandallowfromthatmoment
onfortheinternalbiasvoltageoperation.Whileoninternalbiasoperation,overloadandshortcircuitprotectionsarerestored.
Foradditionalinformation,seeApplicationNotes.

BasePlateOverTemperatureShutdown:95+/-5°C,non-latching
IsolationCharacteristics:
INPUTTOOUTPUT 4242VDC
Page
7
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*
OperatingTermperatureRange(BasePlate):-0°Cto+85°C
StorageTemperatureRange:-55°Cto+125°C
PHYSICALCHARACTERISTICS:
Size(WxDxH):2.5"x1.55"x0.5"
Weight:75grams
FullyEncapsulated
NOTES:
Allspecificationsaregivenunderfollowingconditions:+25°Cambient,12Vdc(12QPSeries)or24Vdc(24QPSeries)InputatFull
Load
Forcorrectoperation,a10%maximumloadshouldbemaintainedatalltimes
Forexpandedtemperaturerangeornon-standardfeatures,pleaseconsultfactory.
INPUTTOBASEPLATE 2121VDC
OUTPUTTOBASEPLATE 1000VDC
PINDESCRIPTION
Pin#1(-IN)
:NegativeInputVoltageto
theunit,9-18V(12QPSeries)or18-
36V(24QPSeries).UnitsareInput
UV/OVprotected,nonlatchedshut-
down.
Pin#2(SHDN):Whenpulledbelow
0.4Vdcwillcausetheunittoshutdown,
non-latching.
Pin#3(VREF):3Vrefgeneratedon
board.Range2.8Vdcto3.2VdcCurrent
sourcingcapability:10mAmax.
Page
8
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*
PIN FUNCTION
#1 -IN
#2 SHDN
#3 VREF
#4 TRIM
#5 EX.B
#6 +IN
#7 +OUT
#8 -OUT
Pin#4(TRIM):Connectingthispin
througharesistorto-INwillincreaseV
OUT.Connectingitthrougharesistorto
VREFwillreduceVOUT.Adjusting
rangeismax.+/-5%VOUT.
Pin#5(EX.B)
:Thispinisadirectpath
tothecontrollerIC'sVccandshouldnot
exceed20VdcotherwisetheICwillbe
damanged.ExternalBias(Ex.B)will
enableapplicationswheretheunithasto
startupunderanoverloadorshort-
circuitcondition(likecapacitor
chargingapplications).Overload
conditionswillpreventinternalbias
supplytodevelopthestart-upvoltage
duetothehiccupprotectionmodeand
unitwillnotstart.Requiredvoltagefor
Ex.Bstartup:17to20Vdc.Caution:
whenoperatedwithEx.B,theunit
losesoverloadandshorcircuit
protection.DonotconnectifPin#5is
notused.
Pin#6(+IN):
PositiveInputVoltageto
theunit.
Pin#7(+OUT):PositiveOutput
Voltage.Aminimum10%loadacross
theoutputisrequiredinordertoprovide
regulation.Outputisclampedwith
Zenerdiodesata120%VOUT
(typical)tolimitovershootincaseofno
loadoperation.
Pin#8(-OUT):NegativeOutput
Voltage
Page
9
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*

QCHHeatsink,ThermalInterface

Typicalweight:75Grams
Dimensionsareininches
BottomView
THERMALRESISTANCECASETOAIR(°C/W)
BASEPLATE(NOHS)QCHHEATSINK
FREEAIR 9.6 5.6
200LFM 5.1 3.0
400LFM 3.7 2.2
600LFM 3.1 1.8
800LFM 2.6 1.5
1000LFM 2.2 1.3
Page
10
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*

Page
11
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*


PARTTI=THERMALINTERFACE
AlloyAluminumSubstrate
ThermalConductivity(BTU-in/hrsq.ft.°F):1530
CoefficientofThermalExpansion(25-100°C,10{tothe-6th}in-in/°F):13.1
Hardness,BrinnellB:23

TYPEQCH $8.50
TYPEQTI $2.50
NOTE:ForadditionalHeatsinkoptionsconsultfactory.
Page
12
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*
EnduranceLimit,psi:5000
StandardThickness(inches):.002


Forimmediateengineeringassistanceortoplaceanorder:
CallTollFree:800-431-1064
PICOElectronics,Inc.
143SparksAve.Pelham,NY10803-1837
Tel:914-738-1400orFax:914-738-8225
Page
13
of
13
PicoElectronics:QPSERIES
12/18/2007
http://www.picoelectronics.com/dcdclow/peQP.htm?PartNo=12QP300*