- 您现在的位置：买卖IC网 > PDF目录1833 > LTC4061EDD#TRPBF (Linear Technology)IC BATT CHARGER LI-ION 10-DFN PDF资料下载
参数资料
| 型号： | LTC4061EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER LI-ION 10-DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.3 V ~ 8 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 管件 |
LTC4061
OPERATION
R PROG =
, I CHG =
I BAT =
V PROG
TheLTC4061isdesignedtochargesingle-celllithium-ion
batteries. Using the constant current/constant voltage
algorithm, the charger can deliver up to 1A of charge
current with a final float voltage accuracy of ±0.35%. The
LTC4061 includes an internal P-channel power MOSFET and
thermal regulation circuitry. No blocking diode or external
sense resistor is required; thus, the basic charger circuit
requires only two external components.
Normal Operation
The charge cycle begins when the voltage at the V CC pin
rises above the UVLO level and a discharged battery is
connected to BAT. If the BAT pin voltage is below 2.9V,
the charger enters trickle charge mode. In this mode,
the LTC4061 supplies 1/10th of the programmed charge
current in order to bring the battery voltage up to a safe
level for full current charging.
Once the BAT pin voltage rises above 2.9V, the charger
enters constant current mode, where the programmed
charge current is supplied to the battery. When the BAT
pin approaches the final float voltage (4.2V), the LTC4061
enters constant voltage mode and the charge current
decreases as the battery becomes fully charged.
The LTC4061 offers several methods with which to ter-
minate a charge cycle. Connecting an external capacitor
to the TIMER pin activates an internal timer that stops
the charge cycle after the programmed time period has
elapsed. Grounding the TIMER pin and connecting a resis-
tor to the I DET pin causes the charge cycle to terminate
once the charge current falls below a set threshold when
the charger is in constant voltage mode. Connecting the
TIMER pin to V CC disables internal termination, allowing
external charge user termination through the EN input. See
Applications Information for more information on charge
termination methods.
Programming Charge Current
The charge current is programmed using a single resistor
from the PROG pin to ground. When the charger is in the
constant current mode, the voltage on the PROG pin is
1V. The battery charge current is 1000 times the current
out of the PROG pin. The program resistor and the charge
current are calculated by the following equations:
1000 V 1000 V
I CHG R PROG
The charge current out of the BAT pin can be determined
at any time by monitoring the PROG pin voltage and ap-
plying the following equation:
? 1000
R PROG
SmartStart
When the LTC4061 is initially powered on or brought out
of shutdown mode, the charger checks the battery volt-
age. If the BAT pin is below the recharge threshold of 4.1V
(which corresponds to approximately 80-90% battery
capacity), the LTC4061 enters charge mode and begins a
full charge cycle. If the BAT pin is above 4.1V, the LTC4061
enters standby mode and does not begin charging. This
feature reduces the number of unnecessary charge cycles,
prolonging battery life.
Automatic Recharge
When the charger is in standby mode, the LTC4061
continuously monitors the voltage on the BAT pin. When
the BAT pin voltage drops below 4.1V, the charge cycle is
automatically restarted and the internal timer is reset to
50% of the programmed charge time (if time termination
is being used). This feature eliminates the need for peri-
odic charge cycle initiations and ensures that the battery
is always fully charged. Automatic recharge is disabled
in user termination mode.
Thermal Regulation
An internal thermal feedback loop reduces the programmed
charge current if the die temperature attempts to rise
above a preset value of approximately 105°C. This feature
protects the LTC4061 from excessive temperature and
allows the user to push the limits of the power handling
capability of a given circuit board without risk of damaging
the LTC4061. The charge current can be set according to
typical (not worst-case) ambient temperatures with the
assurance that the charger will automatically reduce the
current in worst-case conditions.
4061fd
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4062EDD#TRPBF | IC BATT CHARGER LI-ION 10-DFN |
| LTC4063EDD#TRPBF | IC BATT CHRGR LI-ION LDO 10DFN |
| LTC4064EMSE#TRPBF | IC CHARGER BATT L-ION 4V 10-MSOP |
| LTC4065EDC#TRPBF | IC CHARGER BATT LI-ON 6-DFN |
| LTC4066EPF#TRPBF | IC USB POWER MANAGER 24-UTQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4062 | 制造商:LINEAR 制造商全称:LINEAR 功能描述:Standalone 250mA Li-Ion Battery Charger in 2 × 2 DFN |
| LTC4062EDD | 制造商:Linear Technology 功能描述:Battery Charger Li-Ion 800mA 4.2V 10-Pin DFN EP |
| LTC4062EDD#PBF | 功能描述:IC BATT CHARGER LI-ION 10-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 |
| LTC4062EDD#TRPBF | 功能描述:IC BATT CHARGER LI-ION 10-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 |
| LTC4063 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone Linear Li-lon Battery Charger with Thermistor Input |
发布紧急采购，3分钟左右您将得到回复。