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參數(shù)資料
| 型號： | LTC1731-4.2 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Lithium-Ion Linear Battery Charger Controller(4.2V鋰離子線性電池充電器) |
| 中文描述： | 鋰離子線性電池充電控制器（4.2V的鋰離子線性電池充電器） |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 154K |
| 代理商： | LTC1731-4.2 |
1
LTC1731-4.2
Lithium-Ion Linear
Battery Charger Controller
June 2000
The LTC
1731-4.2 is a complete constant-current/con-
stant-voltage linear charger controller for lithium-ion
batteries. Nickel-cadmium (NiCd) and nickel-metal-hy-
dride (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.
When the input supply is removed, the LTC1731-4.2
automatically enters a low current sleep mode, dropping
the battery drain current to typically 7
μ
A. An internal
comparator detects the end-of-charge (
C
/10) condition
while a programmable 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 2.457V.
The LTC1731-4.2 is available in the 8-pin MSOP and SO
packages.
I
Complete Linear Charger Controller for
1-Cell Lithium-Ion Batteries
I
1% Voltage Accuracy
I
Programmable Charge Current
I
C/10 Charge Current Detection Output
I
Programmable Charge Termination Timer
I
Space Saving 8-Pin MSOP Package
I
Automatic Sleep Mode When Input Supply
is Removed (7
μ
A Battery Drain)
I
Automatic Trickle Charging of Low Voltage Cells
I
Programmable for Constant-Current-Only Mode
I
Cellular Phones
I
Handheld Computers
I
Charging Docks and Cradles
I
Programmable Current Source
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
DESCRIPTIO
N
U
APPLICATIO
S
U
TYPICAL APPLICATIO
N
U
V
CC
V
5V TO 12V
SENSE
DRV
1k
R
SENSE
0.2
R
*
19.6k
Li-ION
CELL
LTC1731-4.2
*SHUTDOWN INVOKED BY FLOATING THE PROG PIN
BAT
CHRG
8
7
MBRM120T3
10
μ
F
1731 TA01
1
μ
F
I
BAT
= 500mA
C
0.1
μ
F
CHARGE
STATUS
Q1
Si9430DY
6
1
5
4
+
2
3
TIMER
PROG
GND
500mA Li-Ion Battery Charger
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-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Final Electrical Specifications
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1731EMS8-4.1 | 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC1731EMS8-4.1#PBF | 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC1731EMS8-4.1#TR | 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC1731EMS8-4.1#TRPBF | 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC1731EMS8-4.2 | 功能描述:IC CTRLR BATT CHRGR LI-ION 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
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