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LTC4071IMS8E PDF预览

LTC4071IMS8E

更新时间： 2024-09-24 07:20:35
品牌 Logo 应用领域
Linear Systems 电池
页数 文件大小 规格书
18页 237K
描述
Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect

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中文翻译

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LTC4071IMS8E 数据手册

 浏览型号LTC4071IMS8E的Datasheet PDF文件第2页浏览型号LTC4071IMS8E的Datasheet PDF文件第3页浏览型号LTC4071IMS8E的Datasheet PDF文件第4页浏览型号LTC4071IMS8E的Datasheet PDF文件第5页浏览型号LTC4071IMS8E的Datasheet PDF文件第6页浏览型号LTC4071IMS8E的Datasheet PDF文件第7页 
LTC4071  
Li-Ion/Polymer Shunt  
Battery Charger System with  
Low Battery Disconnect  
DescripTion  
FeaTures  
The LTC®4071 allows simple charging of Li-Ion/Polymer  
batteriesfromverylowcurrent,intermittentorcontinuous  
charging sources. A near-zero current low battery latch-  
ing disconnect function protects even the lowest capacity  
batteries from deep discharge and potentially irreparable  
damage. The 550nA to 50mA operating current makes  
chargingpossiblefrompreviouslyunusablesources.With  
its low operating current the LTC4071 is well suited to  
charge low capacity Li-Ion or thin film batteries in energy  
harvesting applications. The unique architecture of the  
LTC4071 allows for an extremely simple battery charger  
solution, requiring just one external resistor.  
n
Charger Plus Pack Protection in One IC  
n
Low Operating Current (550nA)  
n
Near Zero Current (<0.1nA) Low Battery Disconnect  
Function to Protect Batteries from Over-Discharge  
n
Pin Selectable Low Battery Disconnect Level:  
2.7V or 3.2V  
n
1ꢀ Float Voltage Accuracy Over Temperature  
n
50mA Maximum Internal Shunt Current  
n
n
Pin Selectable Float Voltage Options: 4.0V, 4.1V, 4.2V  
Ultralow Power Pulsed NTC Float Conditioning for  
Li-Ion/Polymer Protection  
n
Suitable for Intermittent, Continuous and Very Low  
Power Charging Sources  
High Battery Status Output  
Thermally Enhanced, Low Profile (0.75mm)  
8-Lead (2mm × 3mm) DFN and MSOP Packages  
The LTC4071 offers apin selectablefloat voltage with 1ꢀ  
accuracy. The integrated thermal battery qualifier extends  
battery lifetime and improves reliability by automatically  
reducing the battery float voltage at NTC thermistor tem-  
peratures above 40°C. The LTC4071 also provides two  
pin selectable low battery disconnect levels and a high  
battery status output.  
n
n
applicaTions  
n
Low Capacity, Li-Ion/Polymer Battery Back-Up  
The device is offered in twothermally enhancedpackages,  
a compact low profile (0.75mm) 8-lead (2mm × 3mm)  
DFN and an 8-lead MSOP package.  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
n
Thin Film Batteries  
n
Energy Scavenging/Harvesting  
Solar Power Systems with Back-Up  
Memory Back-Up  
Embedded Automotive  
n
n
n
Typical applicaTion  
Battery Disconnect ILEAK vs Temperature  
100n  
V
IN  
V
= 2.65V  
BAT  
R
10n  
1n  
IN  
TO SYSTEM LOAD: V  
BAT  
CC  
V
CC  
ADJ  
NTC  
LTC4071  
100p  
10p  
1p  
1µF  
+
LBSEL  
Li-Ion  
GND  
4071 TA01a  
0.1p  
25  
50  
75  
100  
–25  
0
125  
TEMPERATURE (°C)  
4071 TA01b  
4071fc  
1
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