www.德州仪器.com
FEATURESAPPLICATIONS
描述
交流
USB BAT
输出
bq2403x
PACK+
PACK−
系统
VDC
地
VBUS
地
D+
d −
usb 端口
交流Adapter
+
Q1
Q2Q3
UDG−04082
40
m
Ω
(2)
bq24030,bq24031,bq24032,
bq24032a,bq24035,bq24038,bq24039
SLUS618C–AUGUST2004–REVISEDJUNE2005
单独的-chipchargeandsystempower-pathmanagementic(bqtiny™-iii)
•
SmartPhonesandPDA
•
small3,5mm×4,5mmqfnpackage
•
MP3Players
•
designedforsingle-cellli-ion-或者
•
DigitalCamerasHandheldDevices
li-polymer-basedportableapplications
•
InternetAppliances
•
integrateddynamicpower-pathmanagement
(dppm)featureallowingtheacadapteror
theUSBPorttoSimultaneouslyPowerthe
SystemandChargetheBattery
thebqtiny™-iiiseriesofdevicesarehighlyinte-
•
PowerSupplementModeAllowsBatteryto
gratedli-ionlinearchargersandsystempower-path
managementdevicestargetedatspace-limitedport-
SupplementtheUSBorACInputCurrent
ableapplications.thebqtiny-iiiseriesofferinte-
•
autonomouspowersourceselection(交流
gratedusb-portanddcsupply(acadapter),
adapterorusb)
电源-pathmanagementwithautonomous
•
IntegratedUSBChargeControlWith
电源-sourceselection,powerfetsandcurrent
selectable100-maand500-mamaximum
传感器,highaccuracycurrentandvoltageregu-
InputCurrentRegulationLimits
lation,chargestatus,andchargetermination,ina
singlemonolithicdevice.
•
usbhighcurrentregulationlimit,1amax
(bq24039only)
thebqtiny-iiipowersthesystemwhileindepen-
dentlychargingthebattery.thisfeaturereducesthe
•
DynamicTotalCurrentManagement
chargeanddischargecyclesonthebattery,准许
forUSB
forproperchargeterminationandallowsthesystem
•
supportsupto2-atotalcurrent
torunwithanabsentordefectivebatterypack.这个
•
3.3-vintegratedldooutput
featurealsoallowsforthesystemtoinstantaneously
turnonfromanexternalpowersourceinthecaseof
•
ThermalRegulationforChargeControl
adeeplydischargedbatterypack.theicdesignis
•
ChargeStatusOutputsforLEDorSystem
focusedonsupplyingcontinuouspowertothesystem
InterfaceIndicatesChargeandFault
whenavailablefromtheac,usb,orbatterysources.
情况
•
reversecurrent,短的-电路,andthermal
保护
•
powergood(acadapterandusbport
呈现)statusoutputs
•
chargevoltageoptions:4.2vor4.36v
POWERFLOWDIAGRAM
(1)
(1)seefigure2andfunctionalblockdiagramformoredetailedfeatureinformation.
(2)p-fetbackgatebodydiodesaredisconnectedtopreventbodydiodeconduction.
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
bqtinyisatrademarkoftexasinstruments.
unlessotherwisenotedthisdocumentcontainspro-
copyright©2004–2005,texasinstrumentsincorporated
ductiondatainformationcurrentasofpublicationdate.prod-
uctsconformtospecificationsperthetermsofTexasInstruments
standardwarranty.productionprocessingdoesnotnecessarily
includetestingofallparameters.
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