參數(shù)資料
型號: LTC1731-8.2
廠商: 光寶科技股份有限公司
英文描述: LITHIUM - LON LINEAR BATTERY CHARGER CONTROLLER
中文描述: 鋰-倫敦股票交易所線性電池充電控制器
文件頁數(shù): 1/12頁
文件大小: 175K
代理商: LTC1731-8.2
1
LTC1731-8.2/LTC1731-8.4
Lithium-Ion Linear
Battery Charger Controller
sn1731 17318fs
FEATURES
APPLICATIU
DESCRIPTIOU
TYPICAL APPLICATIOU
The LTC
1731-8.2/LTC1731-8.4 are complete constant-
current/constant-voltage linear charger controllers for 2-
cell lithium-ion (Li-Ion)batteries. Nickel-cadmium (NiCd)
and nickel-metal-hydride (NiMH) batteries can also be
charged with constant current using external termina-
tion. The external sense resistor sets the charge current
with 7% accuracy. An internal resistor divider and preci-
sion reference set the final float potential with 1% accu-
racy. The output float voltages are set internally to 8.2V
(LTC1731-8.2) or 8.4V (LTC1731-8.4).
When the input supply is removed, the LTC1731-8.2/
LTC1731-8.4 automatically enter a low current sleep mode,
dropping the battery drain current to typically 15
μ
A. An
internal comparator detects the end-of-charge (
C
/10) con-
dition while a programmable timer, using an external
capacitor, sets the total charge time. Fully discharged cells
are automatically trickle charged at 10% of the pro-
grammed current until battery voltage exceeds 4.95V.
The LTC1731-8.2/LTC1731-8.4 are available in the 8-pin
MSOP and SO packages. For 1-cell Li-Ion battery charg-
ing, see the LTC1731-4.1 and LTC1731-4.2 data sheets.
I
Complete Linear Charger Controller for
2-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 (15
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.
400mA Li-Ion Charger
V
CC
V
IN
= 9V
SENSE
DRV
2k
R
SENSE
0.2
R
*
19.6k
2-CELL
Li-ION
LTC1731-8.4
*SHUTDOWN INVOKED BY FLOATING THE PROG PIN
BAT
CHRG
8
7
MBRM120T3
10
μ
F
1731 TA01
1
μ
F
I
BAT
= 400mA
C
0.1
μ
F
Q1
Si9430DY
6
1
5
4
2
3
TIMER
PROG
GND
+
CHARGE
STATUS
Typical Li-Ion Charge Cycle
TIME (HOURS)
0
C
400
300
200
100
0
9
8
7
6
1.5
2.5
1731 TA01b
0.5
1.0
2.0
3.0
CONSTANT
VOLTAGE
CONSTANT
CURRENT
TIMER
STOPS
CHRG
LED OFF
BATTERY VOLTAGE
400mA HR BATTERY
CHARGE CURRENT
B
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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(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):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(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):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(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):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(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):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(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):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