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应用程序
3
2
4
5
dbv p组件
(top 查看)
1
软件
地
fb
v
入点
en
TYPICALAPPLICATION
v
入点
软件
fb
en
地
L1
10
µ
h
D1
R1
R2
c
ff
c
o
1
µ
f
v
出点
v
入点
至 28 v
v
入点
1.8 v 至 6.0 v
c
入点
4.7
µ
f
70
72
74
76
78
80
82
84
86
88
90
0.10 1 10 100
v
我
= 5 v
v
我
= 3.6 v
v
我
= 2.4 v
效率 - %
效率
vs
输出电流
我
o
- 输出 电流 - ma
5
4
2
3
1
v
o
= 18 v
TPS61040
TPS61041
SLVS413B–OCTOBER2002–REVISEDMAY2004
lowpowerdc/dcboostconverterinsot-23package
•
1.8vto6vinputvoltagerange
thetps61040/41isahigh-frequencyboostcon-
verterdedicatedforsmalltomediumLCDbiassupply
•
AdjustableOutputVoltageRangeupto28V
andwhiteledbacklightsupplies.thedeviceisideal
•
400ma(tps61040)and250ma(tps61041)
togenerateoutputvoltagesupto28Vfromadual
InternalSwitchCurrent
cellnimh/nicdorasinglecellli-ionbattery.这
•
Upto1MHzSwitchingFrequency
partcanalsobeusedtogeneratestandard3.3v/5v
to12vpowerconversions.
•
28µATypicalNoLoadQuiescentCurrent
•
1µATypicalShutdownCurrent
thetps61040/41operateswithaswitchingfre-
quencyupto1mhz.thisallowstheuseofsmall
•
InternalSoftstart
externalcomponentsusingceramicaswellastanta-
•
availableinatiny5-pinsot23package
lumoutputcapacitors.togetherwiththetinysot23
包装,thetps61040/41givesaverysmalloverall
solutionsize.thetps61040hasaninternal400ma
•
LCDBiasSupply
switchcurrentlimit,whilethetps61041hasa250
maswitchcurrentlimit,offeringloweroutputvoltage
•
白色-ledsupplyforlcdbacklights
rippleandallowstheuseofasmallerformfactor
•
DigitalStillCamera
inductorforlowerpowerapplications.thelowquiesc-
•
pdas,organizersandhandheldpcs
entcurrent(typically28µa)togetherwithan
•
CellularPhones
optimizedcontrolscheme,allowsdeviceoperationat
•
InternetAudioPlayer
veryhighefficienciesovertheentireloadcurrent
范围.
•
standard3.3v/5vto12vconversion
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2002–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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