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LTC4071EMS8E 参数 Datasheet PDF下载

LTC4071EMS8E图片预览
型号: LTC4071EMS8E
PDF下载: 下载PDF文件 查看货源
内容描述: 锂离子/锂聚合物并联电池充电器系统具有低电池电量断 [Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect]
分类和应用: 电池
文件页数/大小: 18 页 / 237 K
品牌: LINEAR [ LINEAR INTEGRATED SYSTEMS ]
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FeaTures
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LTC4071
Li-Ion/Polymer Shunt
Battery Charger System with
Low Battery Disconnect
DescripTion
The LTC
®
4071 allows simple charging of Li-Ion/Polymer
batteries from very low current, intermittent or continuous
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
charging possible from previously unusable sources. 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.
The LTC4071 offers a pin selectable float voltage with ±1%
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.
The device is offered in two thermally enhanced packages,
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.
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Charger Plus Pack Protection in One IC
Low Operating Current (550nA)
Near Zero Current (<0.1nA) Low Battery Disconnect
Function to Protect Batteries from Over-Discharge
Pin Selectable Low Battery Disconnect Level:
2.7V or 3.2V
1% Float Voltage Accuracy Over Temperature
50mA Maximum Internal Shunt Current
Pin Selectable Float Voltage Options: 4.0V, 4.1V, 4.2V
Ultralow Power Pulsed NTC Float Conditioning for
Li-Ion/Polymer Protection
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
applicaTions
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Low Capacity, Li-Ion/Polymer Battery Back-Up
Thin Film Batteries
Energy Scavenging/Harvesting
Solar Power Systems with Back-Up
Memory Back-Up
Embedded Automotive
Typical applicaTion
V
IN
R
IN
TO SYSTEM LOAD: V
CC
ADJ
NTC
1µF
LBSEL
GND
V
CC
BAT
Battery Disconnect I
LEAK
vs Temperature
100n
10n
1n
I
LEAK
(A)
100p
10p
Li-Ion
1p
4071 TA01a
V
BAT
= 2.65V
LTC4071
+
0.1p
–25
0
25
50
75
100
125
4071fc
TEMPERATURE (°C)
4071 TA01b
1