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參數(shù)資料
| 型號(hào)： | PQ60025ETL35PRS-G |
| 廠商： | SYNQOR INC |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, EIGHTH-BRICK PACKAGE-8 |
| 文件頁(yè)數(shù)： | 2/13頁(yè) |
| 文件大小： | 1561K |
| 代理商： | PQ60025ETL35PRS-G |
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Product # PQ60025ETL35
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2ET625F Rev. B
5/28/08
Page 10
Technical Specification
Input:
Output:
Current:
Package:
35V – 75 V
2.5 V
35 A
Eighth-brick
OUTPUT VOLTAGE TRIM (Pin 6):TheTRIMinputpermits
theusertoadjusttheoutputvoltageacrossthesenseleads
upordownaccordingtothetrimrangespecifications.
Todecreasetheoutputvoltage,theusershouldconnect
aresistorbetweenPin6andPin5(SENSE(-)input).Fora
desireddecreaseofthenominaloutputvoltage,thevalueof
theresistorshouldbe
Rtrim-down=
(511)-10.22(kW)
D%
where
D% = Vnominal–Vdesired x100%
Vnominal
Toincreasetheoutputvoltage,theusershouldconnecta
resistorbetweenPin6andPin7(SENSE(+)input).Fora
desiredincreaseofthenominaloutputvoltage,thevalueof
theresistorshouldbe
FigureCgraphstherelationshipbetweenthetrimresistor
valueandRtrim-upandRtrim-down,showingthetotalrange
theoutputvoltagecanbetrimmedupordown.
Figure C:
Trim Graph for 2.5Vout module
Note: theTRIMfeaturedoesnotaffectthevoltageatwhich
theoutputover-voltageprotectioncircuitistriggered.Trim-
mingtheoutputvoltagetoohighmaycausetheover-voltage
protectioncircuittoengage,particularlyduringtransients.
Itisnotnecessaryfortheusertoaddcapacitanceatthe
Trimpin.Thenodeisinternallybypassedtoeliminatenoise.
Total DC Variation of Vout:Fortheconvertertomeetits
fullspecifications,themaximumvariationoftheDCvalueof
Vout,duetobothtrimmingandremoteloadvoltagedrops,
shouldnotbegreaterthanthatspecifiedfortheoutputvolt-
agetrimrange.
PROTECTIONFEATURES
Input Under-Voltage Lockout: Theconverterisdesigned
toturnoffwhentheinputvoltageistoolow,helpingavoid
aninputsysteminstabilityproblem,describedinmoredetail
intheapplicationnotetitled“InputSystemInstability”.The
lockoutcircuitryisacomparatorwithDChysteresis.When
theinputvoltageisrising,itmustexceedthetypicalTurn-On
VoltageThresholdvalue(listedonthespecificationpage)
beforetheconverterwillturnon.Oncetheconverterison,
theinputvoltagemustfallbelowthetypicalTurn-OffVoltage
Thresholdvaluebeforetheconverterwillturnoff.
Output Current Limit: Oncetheoutputcurrentreaches
thecurrent-limitinceptionpoint,theconverterwilldecrease
theoutputvoltageastheoutputcurrentincreases.However,
oncetheimpedanceoftheshortacrosstheoutputissmall
enoughtomaketheoutputvoltagedropbelowthespecified
OutputDCCurrent-LimitShutdownVoltage,theconverter
turnsoff(seeFigure23).
Theconverterthenentersa“hiccupmode”whereitrepeat-
edlyturnsonandoffata5Hz(nominal)frequencywitha
5%dutycycleuntiltheshortcircuitconditionisremoved.
Thispreventsexcessiveheatingoftheconverterortheload
board.
Output Over-Voltage Limit: Ifthevoltageacrossthe
outputpinsexceedstheOutputOver-VoltageProtection
threshold,theconverterwillimmediatelystopswitching.This
preventsdamagetotheloadcircuitdueto1)excessivese-
riesresistanceinoutputcurrentpathfromconverteroutput
pinstosensepoint,2)areleaseofashort-circuitcondition,
or3)areleaseofacurrentlimitcondition.Loadcapacitance
determinesexactlyhowhightheoutputvoltagewillrisein
responsetotheseconditions.After200mstheconverterwill
automaticallyrestart.
Over-Temperature Shutdown: Atemperaturesensoron
theconvertersensestheaveragetemperatureofthemod-
ule.Thethermalshutdowncircuitisdesignedtoturnthe
converteroffwhenthetemperatureatthesensedlocation
reachestheOver-TemperatureShutdownvalue.Itwillallow
theconvertertoturnonagainwhenthetemperatureofthe
sensedlocationfallsbytheamountoftheOver-Temperature
ShutdownRestartHysteresisvalue.
Rtrim-up
(kW)
)
where
VOUT=NominalOutputVoltage
=
(
_511 _10.22
5.11VOUT(100+D%)
1.225D%
D%
10.0
100.0
1,000.0
10,000.0
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20
Trim
Resistance
(kOhms)
% Increase in Vout
% Decrease in Vout
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