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特点
应用程序
描述
SWN
TPS65123
D1
L1
10
C1
2.2
v
入点
2.7 v 至 5.5 v
v
GL
向下 至 −18 v/2 ma
C3
100 nfr4
R3
SWP
FBL
VMAIN
FBM
C5
220 nf
R6
R5
v
主
3.0 v 至 5.3 v/25 ma
C4
1
引导
VGH
C2
100 nf
v
生长激素
向上 至 20 v/2 ma
PGND
AGND
FBH
运行
en
VIN
一个
一个
闸门
R2
R1
f
µ
µ
f
µ
h
0.1
0.5
0.9
4.0
8.0
12.0
16.0
20.0
24.0
2.3
2.4
2.6
2.8
3.2
4.0
4.7
5.2
5.5
0
10
20
30
40
50
60
70
80
90
100
核心 变频器 效率 − %
v
入点
− 输入 v旧 − v
我
引导
− 荷载 电流 − ma
tps65120,tps65121,tps65123,tps65124
SLVS531A–JUNE2004–REVISEDMARCH2005
单独-inductorquadruple-输出
TFTLCDPOWERSUPPLY
•
AutomaticorProgrammablePower
测序
•
mainoutput,v
主
•
Complete1mmComponentProfileSolution
–adjustablevoltage,3.0vto5.6v/25ma
•
2.5vto5.5vinputvoltagerange
–post-regulatedforlowripple(5mv
pp
)
•
OutputShortCircuitProtected
–±0.8%typicalaccuracy
–Efficiencyupto83%
•
16-pinqfnpackage(3×3×0,9mm)
•
positiveoutput,v
生长激素
–adjustablevoltageupto20v/2ma
•
smallformfactora-siandltpstftlcd
–±3%TypicalAccuracy
•
cellphones,smartphones
•
negativeoutput,v
GL
•
pdas,pocketpcs
–adjustablevoltagedownto-18v/2ma
•
PortableDVD
–±3%TypicalAccuracy
•
数字-stillcameras,摄像机
•
auxiliary1.8v/3.3vlinearregulator
•
HandheldInstruments
•
PortableGPS
•
CarNavigationSystems
thetps6512xdc-dcconvertersuppliesallthreevoltagesrequiredbyamorphous-硅(一个-si)和
低-temperaturepoly-硅(ltps)tft-lcddisplays.thecompactlayoutofthetps6512xusesasingle
inductortogenerateindependently-regulatedpositiveandnegativeoutputs.afree-runningvariablepeakcurrent
pwmcontrolschemetime-multiplexestheinductorbetweenoutputs.thiscontrolarchitectureoperatesata
伪-固定-frequencytoprovidefastresponsetolineandloadtransientswhilemaintainingarelatively
constantswitchingfrequencyandhighefficiencyoverawiderangeofinputandoutputvoltages.duetothehigh
switchingfrequencycapabilityofthedevice,inexpensiveandultra-thin8.2or10µhinductorscanbeused.
themainoutput,v
主
,ispost-regulatedtoprovidealow-ripplesourcedrivevoltageforthelcddisplay.这
auxiliaryoutputsgenerateaboostedoutputvoltage,v
生长激素
,upto20v,andanegativeoutputvoltage,v
GL
,downto
-18vforthelcdgatedrive.thedevicehasinternalcurrentlimitingforhighreliabilityunderfaultconditions.
另外,thedeviceoffersafixedoutputlinearregulatorforthelcdlogiccircuitry.
figure1.typicalapplicationfigure2.coreconverterefficiency
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2004–2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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