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參數(shù)資料
| 型號(hào)： | PQ60260HTB10PYF |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 250 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | HALF-BRICK PACKAGE-11 |
| 文件頁(yè)數(shù)： | 13/13頁(yè) |
| 文件大小： | 1524K |
| 代理商： | PQ60260HTB10PYF |
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Product # PQ60260HTB10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 9
Input:
Output:
Current:
Package:
35-75 V
26 V
9.6 A (250W)
Half-brick
Technical Specification
BASICOPERATIONANDFEATURES
ThePowerQorseriesconverterusesatwo-stagepowerconversion
topology.Thefirststageisabuck-converterthatkeepstheoutput
voltage constant over variations in line, load, and temperature.
Thesecondstageusesatransformertoprovidethefunctionsof
input/outputisolationandvoltagestep-downtoachievethelow
outputvoltagerequired.
Both the first stage and the second stage switch at a fixed fre-
quencyforpredictableEMIperformance.Rectificationofthetrans-
former’soutputisaccomplishedwithsynchronousrectifiers.These
devices,whichareMOSFETswithaverylowon-stateresistance,
dissipatefarlessenergythanSchottkydiodes.Thisistheprimary
reasonthatthePowerQorconverterhassuchhighefficiency,even
atverylowoutputvoltagesandveryhighoutputcurrents.
Dissipation throughout the converter is so low that it does not
requireaheatsinkforoperation.Sinceaheatsinkisnotrequired,
thePowerQorconverterdoesnotneedametalbaseplateorpot-
tingmaterialtohelpconductthedissipatedenergytotheheatsink.
ThePowerQorconvertercanthusbebuiltmoresimplyandreliably
usinghighyieldsurfacemounttechniquesonaPCBsubstrate.
The PowerQor series of half-brick, quarter-brick and eighth-brick
convertersusestheindustrystandardfootprintandpin-outconfigura-
tion.
CONTROLFEATURES
REMOTE ON/OFF (Pin 2):TheON/OFFinput,Pin2,permits
theusertocontrolwhentheconverterisonoroff.Thisinputisref-
erencedtothereturnterminaloftheinputbus,Vin(-).Thereare
twoversionsoftheconverterthatdifferbythesenseofthelogic
usedfortheON/OFFinput.
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
turnstheconverteron).FigureAdetailsfivepossiblecircuitsfor
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.
Pin8shouldbeconnectedtoVout(+)andPin6shouldbecon-
nected to Vout(-) at the point on the board where regulation is
desired.Aremoteconnectionattheloadcanadjustforavoltage
droponlyaslargeasthatspecifiedinthisdatasheet,thatis
[Vout(+)-Vout(-)]–[Vsense(+)-Vsense(-)]<
SenseRange%xVout
Pins8and6mustbeconnectedforproperregulationoftheout-
putvoltage.Iftheseconnectionsarenotmade,theconverterwill
deliveranoutputvoltagethatisslightlyhigherthanitsspecified
value.
Note:theoutputover-voltageprotectioncircuitsensesthevoltage
acrosstheoutput(pins9and5)todeterminewhenitshouldtrig-
ger,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.
OpenCollectorEnableCircuit
Figure A: Various circuits for driving the ON/OFF pin.
Figure B: Internal ON/OFF pin circuitry
RemoteEnableCircuit
DirectLogicDrive
NegativeLogic
(PermanentlyEnabled)
PositiveLogic
(PermanentlyEnabled)
ON/OFF
Vin(_
)
ON/OFF
Vin(_
)
ON/OFF
5V
TTL/
CMOS
Vin(_
)
ON/OFF
Vin(_)
Vin(_
)
TTL
5V
50k
274k
Vin(+)
ON/OFF
Vin(_)
50k
100pF
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