參數(shù)資料
型號： PMB8818TP
廠商： ERICSSON POWER MODULES AB
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-10
文件頁數(shù)： 22/32頁
文件大?。?/td> 1551K
代理商： PMB8818TP
EN/LZT146066R2A EricssonPowerModules,April2007
PMB8818TPDatasheet
OptionalInputFilter
Tominimizeinputrippleandtoensureevenbetterstability
morecapacitorscanbeadded,seetablebelow.
Considerthemaxoutputpowerinagivenapplicationand
choosesufficientcapacitorstoobtaindesiredripplelevel.
Makesurethattheextracapacitorsareplacedneartheinput
pins.Thetablebelowisjustanexamplesincetheboard
layoutalsohaseffectontheresult.
Requiredoutputfilter
Externaloutputcapacitanceisalsorequiredtoreducethe
outputrippleandtoobtainspecifiedloadstepresponse.It
isrecommendedtouselowESRpolymercapacitorsorlow
ESRceramiccapacitors.
Minimumrequirement:
PMB8818TP
2x150F.(low ESR polymer type).
This is the output filter used in the verification and needed to
meet the specification.
Outputpower
Desiredinputripple(mVp-p)
150
250
500
0-20W
2x4.7F
-----
20-40W
5x4.7F
2x4.7F
-----
40-60W
8x4.7F
4x4.7F
2x4.7F
60-80W
11x4.7F
7x4.7F
4x4.7F
Note:Alloutputcharacteristicsinthedatasheetaremeasuredwith4x4.7Fattheinputpins.
AllPMB8000SeriesDC/DCregulatorshaveapositivere-
motesensepinthatcanbeusedtocompensateformoder-
ateamountsofresistanceinthedistributionsystemandal-
lowforvoltageregulationattheloadorotherselectedpoint.
Theremotesenselinewillcarryverylittlecurrentanddoes
notneedalargecrosssectionalarea.However,thesense
lineonthePCBshouldbelocatedclosetoagroundtraceor
groundplane.Theremotesensecircuitrywillcompensatefor
upto10%voltagedropbetweenthesensevoltageandthe
voltageattheoutputpinsfromVOnom.Iftheremotesenseis
notneededthesensepinshouldbeleftopenorconnected
tothepositiveoutput.
Remote Sense
Current Limit Protection
ThePMB8000SeriesDC/DCregulatorsincludecurrent
limitingcircuitrythatallowsthemtowithstandcontinuous
overloadsorshortcircuitconditionsontheoutput.Theout-
putvoltagewilldecreasetowardszeroforoutputcurrentsin
excessofmaxoutputcurrent(Iomax).Whenthecurrentlimit
isreachedtheregulatorwillgointohiccupmode.Thecur-
rentlimitistemperaturedependent,i.e.thelimitdecrease
athigheroperatingtemperature,theregulatorisguaranteed
tostartatIOmaxx1.25@Tref115°C.Theregulatorwill
resumenormaloperationafterremovaloftheoverload.The
loaddistributionsystemshouldbedesignedtocarrythe
maximumoutputshortcircuitcurrentspecified.
Over Temperature Protection (OTP)
ThePMB8000SeriesDC/DCregulatorsareprotectedfrom
thermaloverloadbyaninternalovertemperatureshutdown
circuit.WhenthePCBtemperatureneartheICcircuitreach-
es130°Ctheconverterwillshutdownimmediately.The
regulatorwillmakecontinuousattemptstostartup(non-
latchingmode)andresumenormaloperationautomatically
whenthetemperaturehasdroppedbelowthetemperature
threshold.
Input And Output Impedance
Theimpedanceofboththepowersourceandtheloadwill
interactwiththeimpedanceoftheDC/DCregulator.Itis
mostimportanttohavealowcharacteristicimpedance,
bothattheinputandoutput,astheregulatorshavealow
energystoragecapability.Usecapacitorsacrosstheinputif
thesourceinductanceisgreaterthan4.7
mH.Suitableinput
capacitorsare22
mF-220mFlowESRceramics.
Minimum Required External Capacitors
RequiredInputFilter
Externalinputcapacitorsarerequiredtoincreasethelife-
timeoftheinternalcapacitors.LowESRceramicsshouldbe
used,theminimuminputcapacitanceisstatedbelow:
PMB8818TP 2x4.7
mF
Maximum Capacitive Load
Whenpoweringloadswithsignificantdynamiccurrent
requirements,thevoltageregulationattheloadcanbe
improvedbyadditionofdecouplingcapacitanceattheload.
ThemosteffectivetechniqueistolocatelowESRceramic
capacitorsasclosetotheloadaspossible,usingseveral
capacitorstolowerthetotalESR.Theseceramiccapacitors
willhandleshortdurationhigh-frequencycomponents
ofdynamicloadchanges.Inaddition,highervaluesof
capacitors(electrolyticcapacitors)shouldbeusedtohandle
themid-frequencycomponents.Itisequallyimportant
tousegooddesignpracticewhenconfiguringtheDC
distributionsystem.
LowresistanceandlowinductancePCBlayoutsand
cablingshouldbeused.Rememberthatwhenusingremote
sensing,allresistance(includingtheESR),inductanceand
capacitanceofthedistributionsystemiswithinthefeedback
loopoftheregulator.Thiscanaffectontheregulators
compensationandtheresultingstabilityanddynamic
responseperformance.
VerylowESRandhighcapacitancemustbeusedwith
care.A“ruleofthumb”isthatthetotalcapacitancemust
neverexceedtypically500-700
mFifonlylowESR(<2m)
ceramiccapacitorsareused.Ifmorecapacitanceisneeded,
acombinationoflowESRtypeandelectrolyticcapacitors
shouldbeused,otherwisethestabilitywillbeaffected.
Operating Information
相關(guān)PDF資料
PDF描述
PMB8510P 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PMB8118LAPN 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PMB8118NAP 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PMB8419PN 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PMB8510PN 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PMB8825 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Dual-Band Power Amplifier for WLAN Systems
PMB8870 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:single chip baseband IC
PMB8870V1.1 制造商:Infineon Technologies AG 功能描述:
PMB8875 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:S-GOLDlite- Advanced Single - Chip GSM/GPRS Baseband Controller
PMB8876 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:S-GOLD2⑩-Multimedia Engine with Advanced EDGE Modem Functionality
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*