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LTC4056

更新时间： 2024-09-29 22:51:47
品牌 Logo 应用领域
凌特 - Linear 电池
页数 文件大小 规格书
16页 193K
描述
150mA Standalone Linear Li-Ion Battery Charger in ThinSOT

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中文翻译

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LTC4056 数据手册

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LTC4054L-4.2  
150mA Standalone Linear  
Li-Ion Battery Charger in ThinSOT  
U
FEATURES  
DESCRIPTIO  
■
Programmable Charge Current Range:  
TheLTC®4054Lisacomplete, constant-current/constant-  
voltage linear charger for single cell lithium-ion batteries.  
Its small size and ability to regulate low charge currents  
make the LTC4054L especially well-suited for portable  
applications using low capacity rechargeable lithium-ion  
coin cells. Furthermore, the LTC4054L is specifically de-  
signed to work within USB power specifications.  
10mA to 150mA  
■
No External MOSFET, Sense Resistor or Blocking  
Diode Required  
Complete Linear Charger in ThinSOTTM Package for  
Single Cell/Coin Cell Lithium-Ion Batteries  
Constant-Current/Constant-Voltage Operation with  
Thermal Regulation* to Maximize Charge Rate  
Without Risk of Overheating  
■
■
No external sense resistor is needed, and no blocking di-  
ode is required due to the internal MOSFET architecture.  
Thermalfeedbackregulatesthechargecurrenttoeliminate  
thermaloverdesign.Thechargevoltageisfixedat4.2V,and  
the charge current can be programmed externally with a  
single resistor. The LTC4054L automatically terminates a  
charge cycle when the charge current drops to 1/10th the  
programmed value after the final float voltage is reached.  
■
Charges Single Cell Li-Ion Batteries Directly  
from USB Port  
■
■
■
■
■
■
■
■
■
Preset 4.2V Charge Voltage with ±1% Accuracy  
Charge Current Monitor Output for Gas Gauging*  
Automatic Recharge  
Charge Status Output Pin  
C/10 Charge Termination  
25µA Max Supply Current in Shutdown Mode  
2.9V Trickle Charge Threshold  
Soft-Start Limits Inrush Current  
Available in a 6-Lead Low Profile (1mm)  
When the input supply (wall adapter or USB supply) is  
removed, the LTC4054L automatically enters a low cur-  
rent state, dropping the battery drain current to less than  
2µA. The LTC4054L can be put into shutdown mode, re-  
ducing the supply current to 25µA.  
SOT-23 PackageU  
Otherfeaturesincludechargecurrentmonitor,undervoltage  
lockout, automatic recharge and a status pin to indicate  
charge termination and the presence of an input voltage.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
ThinSOT is a trademark of Linear Technology Corporation.  
*U.S. Patent No. 6,522,118  
APPLICATIO S  
■
Charger for Li-Ion Coin Cell Batteries  
■
Portable MP3 Players, Wireless Headsets  
■
Bluetooth Applications  
Multifunction Wristwatches  
■
U
TYPICAL APPLICATIO  
Complete Charge Cycle (130mAh Battery)  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
4.4  
4.3  
4.2  
4.1  
4.0  
3.9  
3.8  
3.7  
3.6  
3.5  
3.4  
90mA Li-Ion Single Coin Cell Charger  
CONSTANT  
CURRENT  
CONSTANT  
VOLTAGE  
V
IN  
4.5V TO 6.5V  
1µF  
4
V
3
5
CC  
BAT  
90mA  
LTC4054L-4.2  
4.2V  
V
= 5V  
CC  
JA  
PROG  
COIN CELL  
Li-Ion  
BATTERY  
θ
= 130°C/W  
GND  
R
T
= 1.69k  
PROG  
= 25°C  
1.69k  
A
2
4054l42 TA01  
0
0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25  
TIME (HOURS)  
4054l42 TA01b  
4054l42f  
1
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