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1
2
3
4
8
7
6
5
VC1
VC2
VC3
地
输出
VDD
CD
VC4
pw pACKAGE
(t运算 视图)
地
输出
VDD
CD
VC4
VC1
VC3
1
2 VC2
3
4 5
6
7
8
dct pACKAGE
(t运算 视图)
bq29400,bq29400a
bq29401,bq29405
SLUS568B–JULY2003–REVISEDNOVEMBER2004
voltageprotectionfor2-,3-,or4-celllionbatteries
(2
ND
保护)
•
2-,3-,or4-cellsecondaryprotection
Eachcellinamultiplecellpackiscomparedtoan
internalreferencevoltage.ifonecellreachesan
•
LowPowerConsumptionI
CC
<2µa
overvoltagecondition,theprotectionsequencebe-
[VCELL
(所有)
<v
(保护)
]
gins.thebq2940xdevicestartscharginganexternal
•
highaccuracyoversensevoltage:
capacitorthroughthecdpin.whenthecdpin
–bq29400:4.35v
±
25mV
voltagereaches1.2v,theoutpinchangesfroma
lowleveltoahighlevel.
–bq29400a:4.40v
±
25mV
–bq29401:4.45v
±
25mV
–bq29405:4.65v
±
25mV
•
PrefixedProtectionThresholdVoltage
•
ProgrammableDelayTime
•
HighPowerSupplyRippleRejection
•
StableDuringPulseChargeOperation
•
2
nd
LevelProtectioninLionBatteryPacksin
–NotebookPCs
–PortableInstrumentation
–MedicalandTestEquipment
thebq29400,bq29400a,bq29401,andbq29405are
bicmossecondaryprotectionicsfor2-,3-,or4-cell
lithium-ionbatterypacksthatincorporatea
高-accuracyprecisionovervoltagedetectioncircuit.
Theyincludeaprogrammabledelaycircuitforover
voltagedetectiontime.
ORDERINGINFORMATION
包装
T
一个
V
(保护)
msop(dtc)symboltssop(pw)
(1)
标识
4.35vbq29400dct3ciqbq29400pw2400
4.40vbq29400adct3citnotavailable-
–25
°
Cto85
°
C
4.45vbq29401dct3cirbq29401pw2401
4.65vbq29405dct3cisnotavailable-
(1)thebq29400,bq29400a,bq29401,andbq29405areavailabletapedandreeled.addanrsuffixtothedevicetype(e.g.,
bq29400pwr)toordertapeandreelversion.
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2003–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
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