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参数资料
| 型号： | LTC4068EDD-4.2 |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER W/PROG TERM 8DFN |
| 标准包装： | 121 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.25 V ~ 6.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 包装： | 管件 |
LTC4068-4.2/LTC4068X-4.2
Standalone Linear
Li-Ion Battery Charger with
Programmable Termination
FEATURES
DESCRIPTIO
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Programmable Charge Current Up to 950mA
Complete Linear Charger in DFN Package
No MOSFET, Sense Resistor or Blocking Diode
Required
Thermal Regulation Maximizes Charge Rate
Without Risk of Overheating*
Charges Directly from a USB Port
Programmable Charge Current Termination
Preset 4.2V Charge Voltage with ± 1% Accuracy
Charge Current Monitor Output for Gas Gauging*
Automatic Recharge
Charge Status Output
“AC Present” Output
2.9V Trickle Charge Threshold (LTC4068)
Available Without Trickle Charge (LTC4068X)
Soft-Start Limits Inrush Current
The LTC ? 4068 is a complete constant-current/constant-
voltage linear charger for single cell lithium-ion batteries.
Its DFN package and low external component count make
the LTC4068 ideally suited for portable applications. Fur-
thermore, the LTC4068 is designed to work within USB
power specifications.
No external sense resistor or external blocking diode are
required due to the internal MOSFET architecture. Thermal
feedback regulates the charge current to limit the die
temperature during high power operation or high ambient
temperature conditions. The charge voltage is fixed at
4.2V and the charge current is programmed with a resis-
tor. The LTC4068 terminates the charge cycle when the
charge current drops below the programmed termination
threshold after the final float voltage is reached.
Low Profile (3mm × 3mm × 0.75mm) DFN Package
■
APPLICATIO S
When the input supply (wall adapter or USB supply) is
removed, the LTC4068 enters a low current state dropping
the battery drain current to less than 2 μ A. Other features
■
■
Cellular Telephones, PDAs, MP3 Players
Bluetooth Applications
include charge current monitor, undervoltage lockout,
automatic recharge and status pins to indicate charge
termination and the presence of adequate input voltage.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Protected by U.S. Patents, including 6522118.
TYPICAL APPLICATIO
Complete Charge Cycle (750mAh Battery)
Single Cell Li-Ion Battery Charger with C/5 Termination
600m A
700
600
CONSTANT
CURRENT
CONSTANT
4.75
4.50
V IN
4.5V TO 6.5V
V CC
BAT
500
VOLTAGE
4.25
LTC4068-4.2
400
4.00
1 μ F
CHRG
ACPR ITERM
EN PROG
GND
1.65k
+
825 ?
1-CELL
Li-Ion
BATTERY
406842 TA01
300
200
100
V CC = 5V
θ JA = 40 ° C/W
R PROG = 1.65k
R TERM = 825 ?
3.75
3.50
3.25
T A = 25 ° C
0
3.00
0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25
TIME (HOURS)
406842 TA02
406842fa
1
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| LTC4068XEDD-4.2 | 功能描述:IC CHARGER BATT LI-ON 8-DFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4068XEDD-4.2#PBF | 功能描述:IC CHARGER BATT LI-ON 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LTC4068XEDD-4.2#TR | 功能描述:IC CHARGER BATT LI-ON 8-DFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4068XEDD-4.2#TRPBF | 功能描述:IC CHARGER BATT LI-ON 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4069 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone 750mA Li-Ion Battery Charger in 2 × 2 DFN with NTC Thermistor Input |
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