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参数资料
| 型号： | LTC4063EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHRGR LI-ION LDO 10DFN |
| 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： | 带卷 (TR) |
LTC4063
OPERATION
R PROG =
, I CHG =
I BAT =
V PROG
TheLTC4063isdesignedtochargeasinglecelllithium-
ion battery and supply a regulated output voltage for
battery-powered applications. 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 LTC4063 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.
The LDO regulator is powered from the battery terminal
and can be programmed for output voltages between 1.2V
and 4.2V using external resistors. An output capacitor is
required on the OUT pin for stability and improved transient
response. A low ESR capacitor of ≥2μF should be used.
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 LTC4063 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 LTC4063
enters constant-voltage mode and the charge current
decreases as the battery becomes fully charged.
The LTC4063 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 IDET 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 termination to be used by the CHGEN
input. See Applications Information for more on charge
termination methods.
Programming the Charge Current
The charge current is programmed using a single resistor
from the PROG pin to ground. The battery charge cur-
rent 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 LTC4063 is initially powered on or brought out
of shutdown mode, the charger checks the voltage on
BAT. If the BAT pin is below the recharge threshold of 4.1V
(which corresponds to approximately 80% to 90% battery
capacity), the LTC4063 enters charge mode and begins a
full charge cycle. If the BAT pin is above 4.1V, the LTC4063
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 LTC4063
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% the programmed charge time (if time termination is
being used). This feature eliminates the need for periodic
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
4063fc
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| LTC4064 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic Linear Charger for Back-Up Li-Ion Batteries |
| LTC4064EMSE | 功能描述:IC CHARGER BATT L-ION 4V 10-MSOP 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 |
| LTC4064EMSE#PBF | 功能描述:IC CHARGER BATT L-ION 4V 10-MSOP 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 |
| LTC4064EMSE#TR | 功能描述:IC CHARGER BATT L-ION 4V 10-MSOP 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 |
| LTC4064EMSE#TRPBF | 功能描述:IC CHARGER BATT L-ION 4V 10-MSOP 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 |
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