參數(shù)資料
型號: LTC4099EUDC#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC20
封裝: 3 X 4 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-20
文件頁數(shù): 22/36頁
文件大?。?/td> 536K
代理商: LTC4099EUDC#TRPBF
LTC4099
4099fd
+
+
RNOM
10k
RNTC
10k
NTC
0.228 NTCBIAS
OVERTEMP
4099 F07
LTC4099
NTC BLOCK
TOO_COLD
TOO_HOT
0.738 NTCBIAS
0.326 NTCBIAS
+
2
NTCBIAS
3
T
+
+
RNOM
10.2k
RNTC
10k
R1
845
NTC
0.228 NTCBIAS
OVERTEMP
4099 F08
TOO_COLD
TOO_HOT
0.738 NTCBIAS
0.326 NTCBIAS
+
2
LTC4099
NTC BLOCK
T
NTCBIAS
3
Figure 7. Standard NTC Configuration
Byusingabiasresistor,RNOM,differentinvaluefrom
R25,thehotandcoldtrippointscanbemovedineither
direction.Thetemperaturespanwillchangesomewhatdue
tothenonlinearbehaviorofthethermistor.Thefollowing
equationscanbeusedtoeasilycalculateanewvaluefor
thebiasresistor:
RNOM =
aHOT
0.4839
R25
RNOM =
aCOLD
2.816
R25
where
aHOTandaCOLDaretheresistanceratiosatthe
desiredhotandcoldtrippoints.Notethattheseequations
arelinked.Therefore,onlyoneofthetwotrippointscan
bechosen;theotherisdeterminedbythedefaultratios
designedintheLTC4099.Consideranexamplewherea
50°Chottrippointisdesired.
From the Vishay curve 2 R-T characteristics,
aHOT is
0.4086at50°C.Usingthepriorequation,RNOMshould
besetto8.45k.WiththisvalueofRNOM,aCOLDis2.380
andthecoldtrippointisabout4°C.Noticethatthespan
isnow46°Cratherthantheprevious45°C.Thisisdueto
thedecreaseinthetemperaturegainofthethermistoras
theabsolutetemperatureincreases.
Theupperandlowertemperaturetrippointscanbein-
dependently programmed by using an additional bias
resistorasshowninFigure8.Thefollowingformulascan
beusedtocomputethevaluesofRNOMandR1:
RNOM =
aCOLD – aHOT
2.332
R25
R1
= 0.4839 RNOM – aHOT R25
Forexample,tosetthetrippointsto0°Cand50°Cwith
aVishaycurve2thermistor,choose:
RNOM =
2.816 – 0.4086
2.332
10k
= 10.32k
thenearest1%valueis10.2k:
R1=0.483910.2k–0.408610k=0.850k
Thenearest1%valueis845Ω.Thefinalcircuitisshown
inFigure8,andresultsinanuppertrippointof50°Cand
alowertrippointof0°C.
Figure 8. Modified NTC Configuration
applicaTions inForMaTion
相關(guān)PDF資料
PDF描述
LTC4217CDHC-12#PBF 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16
LTC4217IFE 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO20
LTC4217CFE#TRPBF 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO20
LTC4217IDHC-12 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16
LTC4217IFE#PBF 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4100 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Smart Battery System Manager Available in 48-Lead TSSOP Package
LTC4100_09 制造商:LINER 制造商全稱:Linear Technology 功能描述:Smart Battery Charger Controller
LTC4100EG 功能描述:IC SMART BATTERY CHARGER 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性,鋰離子,鎳鎘,鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)
LTC4100EG#PBF 功能描述:IC SMART BATTERY CHARGER 24-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關(guān)文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標準包裝:4,000 系列:- 功能:燃料,電量檢測計/監(jiān)控器 電池化學(xué):鋰離子(Li-Ion) 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP,8-MSOP(0.118",3.00mm 寬) 供應(yīng)商設(shè)備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2
LTC4100EG#TR 功能描述:IC CHARGER SMART BATTERY 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性,鋰離子,鎳鎘,鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)