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DEVICEINFORMATION
PTV12010L
PTV12010W
SLTS234–DECEMBER2004
TERMINALFUNCTIONS
终端
描述
nameno.
V
I
8thepositiveinputvoltagepowernodetothemodule,whichisreferencedtocommongnd.
V
O
2,3theregulatedpositivepoweroutputwithrespecttothegndnode.
ThisisthecommongroundconnectionfortheV
I
andV
O
powerconnections.itisalsothe0vdcreferenceforthe
gnd1,6
controlinputs.
theinhibitpinisanopen-集电级/流,起作用的-lowinputthatisreferencedtognd.applyingalow-levelground
signaltothisinputdisablesthemodule’soutputandturnsofftheoutputvoltage.whentheinhibitcontrolisactive,
Inhibit7
theinputcurrentdrawnbytheregulatorissignificantlyreduced.iftheinhibitfeatureisnotused,thecontrolpin
shouldbeleftopen-电路.themodulethenproducesanoutputvoltagewheneveravalidinputsourceisapplied.
a1%resistormustbeconnecteddirectlybetweenthispinandgnd(pin1)tosettheoutputvoltageofthemodule
higherthanitslowestvalue.thetemperaturestabilityoftheresistorshouldbe100ppm/
°
c(orbetter).这
设置-pointrangeis1.2vto5.5vforw-suffixdevicesand0.8vto1.8vforl-suffixdevices.theresistorvalue
requiredforagivenoutputvoltagemaybecalculatedusingaformula.ifleftopen-电路,themoduleoutput
V
o
Adjust4
voltagedefaultstoitslowestvalue.forfurtherinformationonoutputvoltageadjustment,consulttherelated
applicationnote.
thespecificationtablegivesthestandardresistorvaluesforanumberofcommonoutputvoltages.
thisisananalogcontrolinputthatenablestheoutputvoltagetofollowanexternalvoltage.thispinbecomes
activetypically20msaftertheinputvoltagehasbeenapplied,andallowsdirectcontroloftheoutputvoltagefrom
0vuptothenominalset-pointvoltage.withinthisrange,theoutputfollowsthevoltageatthetrackpinona
volt-为-voltbasis.whenthecontrolvoltageisraisedabovethisrange,themoduleregulatesatitsset-要点
Track5
电压.thefeatureallowstheoutputvoltagetorisesimultaneouslywithothermodulespoweredfromthesame
inputbus.ifunused,thisinputshouldbeconnectedtov
I
.
便条:duetotheundervoltagelockoutfeature,theoutputofthemodulecannotfollowitsowninputvoltage
duringpowerup.consulttherelatedapplicationinformationforfurtherguidance.
7