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描述
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bq24721
CHGEN
ACDRV
ACN
ACP
ACDET
旁路
EAO
EAI
FBO
AGND
VREF5
VCC
SDA
scl
ts
ISYNSET
IOUT
蝙蝠
SRN
srp
SYNN
SYNP
系统
BATDRV
PVCC
BTST
HIDRV
Ph值
REGN
LODRV
PGND
报警
5x5 qfn p
组件 (顶部 查看)
bq24721
SLUS683–NOVEMBER2005
advancedmulti-chemistryandmulti-cellsynchronousswitch-模式
CHARGERANDSYSTEMPOWERSELECTOR
•
PortableNotebookComputers
•
highefficiencynmos-nmossynchronous
buckconverterwithuser-selectable300khz
•
PortableDVDPlayers
or500kHzfrequency
•
webpads,pctablets
•
sbs-喜欢
(1)
SMBusInterfaceforControland
StatusCommunicationsWithHost
•
programmablebatteryvoltage,费用
thebq24721isasimpletouse,highefficiency
电流,andacadaptercurrentviasbs-喜欢
synchronousbatterypackchargerwithhighlevelof
SMBusInterface
integrationforportableapplications.thisdevice
implementsahighperformanceanalogfront-endthat
•
0.4%chargevoltageregulationaccuracy
easilyinterfacestothesystempowermanagement
•
3%ChargeCurrentRegulationAccuracy
微型-controllerthroughasimplifiedsbs-likesmbus
•
3%AdapterCurrentRegulationAccuracy
接口.
dynamicpowermanagement(dpm)
thedynamicpowermanagement(dpm)功能
•
2%AccuracyIntegratedChargeandAC
modifiesthechargecurrentdependingonsystem
Adapter20xCurrentAmplifierOutput
loadconditions,avoidingacadapteroverload.
•
batterypackvoltagerange0v–19.2v
Highaccuracycurrentsenseamplifiersenable
•
ACAdapterOperatingRange8V–28V
accuratemeasurementofeitherthechargecurrentor
theacadaptercurrent,allowingterminationof
•
99.5%maxdutycycle
nonsmartpacksandmonitoringofoverallsystem
•
InternalSoftStart
电源.
•
integrated5%5-vldowhenacadapter
Theadapterisolationdiodecanbebypassedwithan
已应用
externalMOSFETusingacontrolsignalprovidedby
•
6-vdrivesupplyvoltageforincreased
thebq24721,thusreducingoverallpowerdissipation.
效率
integratedfeaturessuchaschargersoftstart,费用
•
ReverseBatterytoAdapterDischarge
overcurrentprotection,andictemperaturemonitoring
保护
provideasecondlevelofprotection,inadditionto
•
蓄电池/adaptertosystempowerselector
packandsystemprotectionfunctions.
功能
•
ChargeandAdapterOvercurrentProtection
•
batterythermistorsense,ts,比较器
•
availablein32-pin5x5mmqfnpackage
(1)sbs-likeinterfaceisnot100%sbscompliant.sbs-喜欢
interfaceissmbus1.1complaintbutdoesnotsupportpacket
errorcorrection(pec).thecontrolandstatusregisterswere
changedtosimplifyandenhancenotebookchargercontrol.
aneightbitaddress(0x12)isused.请参见Table1fora
comparisonbetweensbs-likevssbsspecification.
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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