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參數(shù)資料
| 型號(hào)： | LTC4011CFE#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| 中文描述： | BATTERY CHARGE CONTROLLER, 640 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | 4.40 MM, LEAD FREE, PLASTIC, TSSOP-20 |
| 文件頁(yè)數(shù)： | 8/26頁(yè) |
| 文件大小： | 653K |
| 代理商： | LTC4011CFE#TRPBF |
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LTC4011
4011fb
ProgrammingMaximumChargeTimes
ConnectingtheappropriateresistorbetweentheTIMER
pinandGNDprogramsthemaximumdurationofvarious
chargingstates.Tosomedegree,thevalueshouldreflect
howcloselytheprogrammedchargecurrentmatchesthe
1Crateoftargetedbatterypacks.Themaximumfastcharge
periodisdeterminedbythefollowingequation:
SometypicaltimingvaluesaredetailedinTable3.RTIMER
shouldnotbelessthan15k.Theactualtimelimitsused
bytheLTC4011havearesolutionofapproximately±30
secondsinadditiontothetolerancesgiventheElectrical
Characteristicstable.Ifthetimerendswithoutavalid–Vor
T/tchargetermination,thechargerentersthefaultstate.
Themaximumtimeperiodisapproximately4.3hours.
CellVoltageNetworkDesign
Anexternalresistornetworkisrequiredtoprovidethe
averagesingle-cellvoltagetotheVCELLpinoftheLTC4011.
ThepropercircuitformulticellpacksisshowninFigure3.
TheratioofR2toR1shouldbeafactorof(n–1),where
nisthenumberofseriescellsinthebatterypack.The
valueofR1shouldbebetween1kand100k.Thisrange
limitsthesensingerrorcausedbyVCELLleakagecurrent
andpreventstheONresistanceoftheinternalNFETbe-
tweenVCDIVandGNDfromcausingasignificanterrorin
theVCELLvoltage.Theexternalresistornetworkisalso
usedtodetectbatteryinsertionandremoval.Thefilter
formedbyC1andtheparallelcombinationofR1andR2
12
9
BAT
LTC4011
R2
+
FOR TWO OR
MORE SERIES CELLS
R1
C1
R2 = R1(n – 1)
4011 F03
VCDIV
GND
8
5
VCELL
Figure3.MulitpleCellVoltageDivider
applicaTions inForMaTion
Table2.LTC4011ChargingParameters
STATE
CHEM
PIN
BAT
CHEMISTRY
TIMER
TMIN
TMAX
ICHRG
TERMINATIONCONDITION
PC
Both
tMAX/12
5°C
45°C
IPROG/5 TimerExpires
FC
Open
NiCd
tMAX
5°C
60°C
IPROG
–20mVperCellor2°C/Minute
GND
NiMH
tMAX
5°C
60°C
IPROG
1.5°C/MinuteforFirsttMAX/12MinutesifInitial
VCELL<1.325V
–10mVperCellor1°C/MinuteAftertMAX/12Minutes
orifInitialVCELL>1.325V
TOC
GND
NiMH
tMAX/3
5°C
60°C
IPROG/10 TimerExpires
AR
Both
5°C
45°C
0
VCELL<1.325V
PC: Precharge
FC: FastCharge(Initial–VTerminationHoldOffoftMAX/12MinutesMayApply)
TOC: Top-OffCharge(OnlyforNiMHT/tFCTerminationAfterInitialtMAX/12Period)
AR: AutomaticRecharge(TemperatureLimitsApplytoStateTerminationOnly)
Table3.LTC4011TimeLimitProgrammingExamples
RTIMER
TYPICALFAST
CHARGERATE
PRECHARGELIMIT
(MINUTES)
FASTCHARGE
VOLTAGESTABILIZATION
(MINUTES)
FASTCHARGELIMIT
(HOURS)
TOP-OFF
CHARGE
(MINUTES)
24.9k
2C
3.8
0.75
15
33.2k
1.5C
5
1
20
49.9k
1C
7.5
1.5
30
66.5k
0.75C
10
2
40
100k
C/2
15
3
60
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4011EFE | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4012 | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:High Effi ciency, Multi-Chemistry Battery Charger with PowerPath Control |
| LTC4012-1 | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:High Effi ciency, Multi-Chemistry Battery Charger with PowerPath Control |
| LTC4012-2 | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:High Effi ciency, Multi-Chemistry Battery Charger with PowerPath Control |
| LTC4012-3 | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control |
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