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参数资料
| 型号： | LTC4076EDD#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) |
LTC4076
APPLICATIO S I FOR ATIO
I CHRG ( DC ) = I CHRG ( USB ) =
500MA
WALL
+
1 F
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 cur-
rent program resistor. In this circuit, one resistor programs
the same charge current for each input supply.
1000 V
R ISET
100MA
(USB, HPWR = LOW)
LTC4076
ADAPTER DCIN BAT
USB USBIN HPWR
PORT 1 F
IUSB
IDC ITERM
R ISET GND R ITERM
2K 1K
1% 1%
4076 F02
Figure 2. Dual Input Charger Circuit. The Wall
Adapter Charge Current and USB Charge Current
are Both Programmed to be 500mA
The LTC4076 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.
Stability Considerations
The constant-voltage mode feedback loop is stable without
any compensation provided a battery is connected to the
charger output. However, a 1μF capacitor with a 1 Ω series
resistor is recommended at the BAT pin to keep the ripple
voltage low when the battery is disconnected.
When the charger is in constant-current mode, the charge
current program pin (IDC or IUSB) is in the feedback loop,
not the battery. The constant-current mode stability is
affected by the impedance at the charge current program
pin. With no additional capacitance on this pin, the char-
ger is stable with program resistor values as high as 20k
(I CHRG = 50mA); however, additional capacitance on these
nodes reduces the maximum allowed program resistor.
WALL
ADAPTER
LTC4076
DCIN
BAT
800MA (WALL)
100MA/500MA (USB)
USB
PORT
1 F
1 F
USBIN
1K
1K
R IUSB
2K
1%
R IDC
1.24K
1%
HPWR PWR
IUSB CHRG
IDC ITERM
GND
R ITERM
1K
1%
+
4.2V
1-CELL
LI-ION
BATTERY
4076 F03
Figure 3. Full Featured Dual Input Charger Circuit
4076fa
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4077 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Input Standalone Li-Ion Battery Charger |
| LTC4077EDD | 功能描述:IC CHARG BATT LI-ON USB 10DFN 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 |
| LTC4077EDD#PBF | 功能描述:IC CHARG BATT LI-ON USB 10DFN 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 |
| LTC4077EDD#TR | 功能描述:IC CHARG BATT LI-ON USB 10DFN 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 |
| LTC4077EDD#TRPBF | 功能描述:IC CHARG BATT LI-ON USB 10DFN 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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