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參數(shù)資料
| 型號(hào)： | PQ60033ETL30PYS-G |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-8 |
| 文件頁數(shù)： | 13/13頁 |
| 文件大小： | 1561K |
| 代理商： | PQ60033ETL30PYS-G |
Product # PQ60025ETL35
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2ET625F Rev. B
5/28/08
Page 9
Technical Specification
Input:
Output:
Current:
Package:
35V – 75 V
2.5 V
35 A
Eighth-brick
BASICOPERATIONANDFEATURES
Thesinglestagepowerconverterswitchesatafixedfre-
quencyforpredictableEMIperformance.Rectificationof
thetransformer’soutputisaccomplishedwithsynchronous
rectifiers.Thesedevices,whichareMOSFETswithaverylow
on-stateresistance,dissipatefarlessenergythanSchottky
diodes.ThisistheprimaryreasonthatthePowerQorcon-
verterhassuchhighefficiency,evenatverylowoutputvolt-
agesandveryhighoutputcurrents.
Dissipationthroughouttheconverterissolowthatitdoes
notrequireaheatsinkforoperation.Sinceaheatsinkisnot
required,thePowerQorconverterdoesnotneedametal
baseplateorpottingmaterialtohelpconductthedissipated
energytotheheatsink.ThePowerQorconvertercanthusbe
builtmoresimplyandreliablyusinghighyieldsurfacemount
techniquesonaPCBsubstrate.
ThePowerQorseriesofeighth-brick,quarter-brickandhalf-
brickconvertersusestheindustrystandardfootprintand
pin-outconfiguration.
CONTROLFEATURES
REMOTE ON/OFF (Pin 2):TheON/OFFinput,Pin2,permits
theusertocontrolwhentheconverterisonoroff.Thisinputis
referencedtothereturnterminaloftheinputbus,Vin(-).There
aretwoversionsoftheconverterthatdifferbythesenseofthe
logicusedfortheON/OFFinput.
In the positive logic version, the ON/OFF input is active high
(meaningthatahighturnstheconverteron).Inthenegative
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(-)atthepointontheboardwhereregula-
tionisdesired.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.
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
10k
ON/OFF
Vin(-)
100pF
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