- 您现在的位置：买卖IC网 > PDF目录1834 > LTC4077EDD#TRPBF (Linear Technology)IC CHARG BATT LI-ON USB 10DFN PDF资料下载
参数资料
| 型号： | LTC4077EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC CHARG BATT LI-ON USB 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) |
LTC4077
APPLICATIO S I FOR ATIO
I CHRG ( DC ) = I CHRG ( USB ) =
I CHRG ( USBL ) =
Thermal Limiting
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 LTC4077 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 device.
The charge current can be set according to typical (not
worst-case) ambient temperature with the assurance that
the charger will automatically reduce the current in worst-
case conditions. DFN power considerations are discussed
further in the Applications Information section.
Using a Single Charge Current Program Resistor
In applications where the programmed wall adapter
charge current and USB charge current are the same, a
single program resistor can be used to set both charge
currents. Figure 2 shows a charger circuit that uses one
charge current program resistor. In this circuit, one registor
programs the same charge current for each input supply
(with HPWR = HIGH).
1000 V
R ISET
The programmed charge current for USB supply with
HPWR in its low state is:
200 V
R ISET
The LTC4077 can also program the wall adapter charge
current and USB charge current independently using two
program resistors, R IDC and R IUSB . Figure 3 shows a
charger circuit that sets the wall adapter charge current
to 800mA and the USB charge current to 500mA (HPWR
= high) or 50mA (HPWR = low).
WALL
ADAPTER
USB
PORT
1 F
1 F
LTC4077
DCIN BAT
USBIN HPWR
IUSB
100MA
(USB, HPWR = LOW)
500MA
+
WALL
ADAPTER
USB
POWER
1 F
1 F
LTC4077
DCIN
USBIN
BAT
1K
800MA (WALL)
500MA (USB,
HPWR = HIGH)
50MA (USB,
HPWR = LOW)
1K
R ISET
2K
1%
IUSBL
IDC
GND
4077 F02
R IUSBL
4.02K
1%
R IUSB
2K
1%
HPWR
IUSBL
IUSB
GND
PWR
CHRG
IDC
R IDC
1.24K
1%
+
4.2V
1-CELL
LI-ION
BATTERY
Figure 2. Dual Input Charger Circuit. The Wall Adapter
Charge Current and USB Charge Currents (HPWR = High)
are Both Programmed to be 500mA. If USBIN is the Supply
and HPWR = Low, the Charge Current is 100mA
4077 F03
Figure 3. Full Featured Dual Input Charger Circuit
4077fa
12
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4078EDD-2#TRPBF | IC USB POWER MANAGER 10-DFN |
| LTC4080EMSE#TRPBF | IC CHARGER LI-ION 10-MSOP |
| LTC4081EDD#TRPBF | IC USB POWER MANAGER 10-DFN |
| LTC4085EDE#TRPBF | IC USB POWER MANAGER 14-DFN |
| LTC4088EDE#TRPBF | IC BATT CHARGER/USB 14-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4078EDD#PBF | 功能描述:IC USB POWER MANAGER 12-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 |
| LTC4078EDD#TRPBF | 功能描述:IC USB POWER MANAGER 12-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 |
| LTC4078EDD-2#PBF | 功能描述:IC USB POWER MANAGER 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 |
| LTC4078EDD-2#TRPBF | 功能描述:IC USB POWER MANAGER 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 |
| LTC4078X | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Input Li-Ion Battery Charger with Overvoltage Protection |
发布紧急采购，3分钟左右您将得到回复。