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参数资料
| 型号： | LTC4077EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/16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
PI FU CTIO S
I BAT =
V IUSB
I BAT =
V IUSBL
I BAT =
V IDC
USBIN (Pin 1): USB Input Supply Pin. Provides power to
the battery charger. The maximum supply current is 650mA.
This pin should be bypassed with a 1μF capacitor.
IUSB (Pin 2): Charge Current Program for High USB Power.
The charge current is set by connecting a resistor, R IUSB ,
to ground. When charging in constant-current mode, this
pin servos to 1V. The voltage on this pin can be used to
measure the battery current delivered from the USB input
using the following formula:
? 1000
R IUSB
IUSBL (Pin 3): Charge Current Program for Low USB Power.
The charge current is set by connecting a resistor, R IUSBL ,
to ground. When charging in constant current mode, this
pin servos to 0.2V. The voltage on this pin can be used to
measure the battery current delivered from the USB input
using the following formula:
? 200
R IUSBL
? ?
? P W R (Pin 4): Open-Drain Power Supply Status Output.
When the DCIN or USBIN pin voltage is suf?cient to begin
charging (i.e. when the supply is greater than the under-
voltage lockout threshold and at least 180mV above the
battery terminal), the ? P ? W ? R pin is pulled low by an internal
N-channel MOSFET. Otherwise ? P ? W ? R is high impedance.
This output is capable of sinking up to 10mA, making it
suitable for driving an LED.
? C H ? ? R ? G (Pin 5): Open-Drain Charge Status Output. When
the LTC4077 is charging, the ? C ? H ? R ? G pin is pulled low by
an internal N-channel MOSFET. When the charge cycle is
completed, ? C ? H ? R ? G becomes high impedance. This output
is capable of sinking up to 10mA, making it suitable for
driving an LED.
? E N ? (Pin 6): Charge Enable Input. A logic low on this pin
enables the charger. If left ?oating, an internal 2M Ω pull-
down resistor defaults the LTC4077 to charge mode. Pull
this pin high for shutdown.
HPWR (Pin 7): HPWR Enable Input. Used to control the
amount of current drawn from the USB port. A logic high
on the HPWR pin sets the current limit at the current
programmed by the IUSB pin. A logic low on the HPWR
pin sets the current limit at the current programmed by the
IUSBL pin. An internal 2M Ω pull-down resistor defaults
the HPWR pin to its low current state.
IDC (Pin 8): Charge Current Program for Wall Adapter
Power. The charge current is set by connecting a resis-
tor, R IDC , to ground. When charging in constant-current
mode, this pin servos to 1V. The voltage on this pin can
be used to measure the battery current delivered from the
DC input using the following formula:
? 1000
R IDC
BAT (Pin 9): Charger Output. This pin provides charge
current to the battery and regulates the ?nal ?oat voltage
to 4.2V.
DCIN (Pin 10): Wall Adapter Input Supply Pin. Provides
power to the battery charger. The maximum supply
current is 950mA. This should be bypassed with a 1 μ F
capacitor.
Exposed Pad (Pin 11): GND. The exposed backside of the
package is ground and must be soldered to PC board ground
for electrical connection and maximum heat transfer.
4077fa
7
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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 |
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