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LTC1731EMS8-4.2 PDF预览

LTC1731EMS8-4.2

更新时间： 2024-01-19 12:18:06
品牌 Logo 应用领域
凌特 - Linear 电池光电二极管控制器
页数 文件大小 规格书
8页 148K
描述
Lithium-Ion Linear Battery Charger Controller

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LTC1731EMS8-4.2 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：MSOP包装说明：TSSOP,
针数：8Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.15模拟集成电路 - 其他类型：BATTERY CHARGE CONTROLLER
控制模式：CURRENT-MODE最大输入电压：12 V
最小输入电压：4.5 V标称输入电压：6 V
JESD-30 代码：S-PDSO-G8JESD-609代码：e3
长度：3 mm湿度敏感等级：1
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：SQUARE封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.1 mm表面贴装：YES
切换器配置：SINGLE技术：CMOS
温度等级：INDUSTRIAL端子面层：Tin (Sn)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：3 mmBase Number Matches：1

LTC1731EMS8-4.2 数据手册

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Final Electrical Specifications  
LTC1731-4.2  
Lithium-Ion Linear  
Battery Charger Controller  
December 1999  
U
DESCRIPTION  
FEATURES  
The LTC®1731-4.2 is a complete constant-current/con-  
stant-voltage linear charge controller for lithium-ion bat-  
teries. Nickel-cadmium (NiCd) and nickel-metal-hydride  
(NiMH) batteries can also be charged with constant  
current using external termination. The external sense  
resistor sets the charge current with 5% accuracy. An  
internal resistor divider and precision reference set the  
final float potential with 1% accuracy. The output float  
voltage is set internally to 4.2V.  
■
Complete Linear Charger Controller for  
1-Cell Lithium-Ion Batteries  
■
1% Voltage Accuracy  
■
Programmable Charge Current  
■
C/10 Charge Current Detection Output  
■
Programmable Charge Termination Timer  
■
Space Saving 8-Pin MSOP Package  
■
Automatic Sleep Mode When Input Supply  
is Removed (Only 7µA Battery Drain)  
■
Automatic Trickle Charging of Low Voltage Cells  
When the input supply is removed, the LTC1731-4.2  
automatically enters a low current sleep mode, dropping  
the battery drain current to 5µA. An internal comparator  
detects the end-of-charge (C/10) condition while a pro-  
grammable timer, using an external capacitor, sets the  
total charge time. Fully discharged cells are automatically  
trickle charged at 10% of the programmed current until  
cell voltage exceeds 2.5V.  
■
Programmable for Constant-Current-Only Mode  
U
APPLICATIONS  
■
Cellular Phones  
■
Handheld Computers  
■
Charging Docks and Cradles  
Programmable Current Source  
■
The LTC1731-4.2 is available in the 8-pin MSOP and SO  
packages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
500mA Li-Ion Charger  
V
IN  
5V TO 15V  
MBRM120T3  
7
R
1k  
SENSE  
V
1µF  
CC  
0.2Ω  
8
6
SENSE  
2
3
Q1  
Si9430DY  
CHRG  
DRV  
LTC1731-4.2  
I
= 500mA  
BAT  
1
5
TIMER  
BAT  
PROG  
C
TIMER  
0.1µF  
GND  
+
R
*
Li-ION  
CELL  
PROG  
10µF  
4
19.6k  
1731 TA01  
*SHUTDOWN INVOKED BY FLOATING THE PROG PIN  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
1
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