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參數(shù)資料
| 型號(hào)： | PQ60025HPA80NRF-G |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 200 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, HALF BRICK PACKAGE-10 |
| 文件頁(yè)數(shù)： | 13/13頁(yè) |
| 文件大?。?/td> | 1536K |
| 代理商： | PQ60025HPA80NRF-G |
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Product # PQ60025HPA80
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HP625K Rev. D
05/28/10
Page 9
Input:
Output:
Current:
Package:
35-75 V
2.5 V
80 A
Half-brick
Technical Specification
BASICOPERATIONANDFEATURES
The PowerQor series converter uses a two-stage power conver-
siontopology.Thefirststageisabuck-converterthatkeepsthe
outputvoltageconstantovervariationsinline,load,andtempera-
ture.Thesecondstageusesatransformertoprovidethefunctions
of input/output isolation and voltage step-down to achieve the
lowoutputvoltagerequired.
Both the first stage and the second stage switch at a fixed fre-
quency for predictable EMI performance. Rectification of the
transformer’soutputisaccomplishedwithsynchronousrectifiers.
These devices, which are MOSFETs with a very low on-state
resistance, dissipate far less energy than Schottky diodes. This
istheprimaryreasonthatthePowerQorconverterhassuchhigh
efficiency,evenatverylowoutputvoltagesandveryhighoutput
currents.
Dissipation throughout the converter is so low that it does not
requireaheatsinkforoperation.Sinceaheatsinkisnotrequired,
the PowerQor converter does not need a metal baseplate or
potting material to help conduct the dissipated energy to the
heatsink.ThePowerQorconvertercanthusbebuiltmoresimply
andreliablyusinghighyieldsurfacemounttechniquesonaPCB
substrate.
ThePowerQorseriesofhalf-brick,quarter-brickandeighth-brick
converters uses the industry standard footprint and pin-out con-
figuration.
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).Inthenegativelogic
version, the ON/OFF signal is active low (meaning that a low
turnstheconverteron).FigureAdetailsfivepossiblecircuitsfor
drivingtheON/OFFpin.FigureBisadetailedlookoftheinter-
nalON/OFFcircuitry.
REMOTE SENSE(+) (Pins 9 and 7): The SENSE(+) inputs
correctforvoltagedropsalongtheconductorsthatconnectthe
converter’soutputpinstotheload.
Pin9shouldbeconnectedtoVout(+)andPin7shouldbecon-
nected to Vout(-) at the point on the board where regulation is
desired.Aremoteconnectionattheloadcanadjustforavoltage
droponlyaslargeasthatspecifiedinthisdatasheet,thatis
[Vout(+)-Vout(-)]–[Vsense(+)-Vsense(-)]<
SenseRange%xVout
Pins 9 and 7 must be connected for proper regulation of the
outputvoltage.Iftheseconnectionsarenotmade,theconverter
willdeliveranoutputvoltagethatisslightlyhigherthanitsspeci-
fiedvalue.
Note:theoutputover-voltageprotectioncircuitsensesthevoltage
across the output (pins 11 and 5) to determine when it should
trigger,notthevoltageacrosstheconverter’ssenseleads(pins
9and7).Therefore,theresistivedropontheboardshouldbe
smallenoughsothatoutputOVPdoesnottrigger,evenduring
loadtransients.
Figure A: Various circuits for driving the ON/OFF pin.
Figure B: Internal ON/OFF pin circuitry
Open Collector Enable Circuit
Remote Enable Circuit
Direct Logic Drive
Negative Logic
(Permanently
Enabled)
(Permanently
Enabled)
ON/OFF
Vin(_
)
ON/OFF
Vin(_
)
ON/OFF
5V
TTL/
CMOS
Vin(_
)
Vin(_
)
Positive Logic
ON/OFF
Vin(_
)
TTL
5V
50k
274k
50k
ON/OFF
Vin(_)
Vin(+)
100pF
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