参数资料
型号: LTC4054ES5-4.2#TR
厂商: Linear Technology
文件页数: 14/16页
文件大小: 0K
描述: IC CHARGR BATTERY L-ION TSOT23-5
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: 4.25 V ~ 6.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: SOT-23-5 细型,TSOT-23-5
供应商设备封装: TSOT-23-5
包装: 带卷 (TR)
LTC4054-4.2/LTC4054X-4.2
APPLICATIO S I FOR ATIO
USB and Wall Adapter Power
The LTC4054 allows charging from both a wall adapter
and a USB port. Figure 7 shows an example of how to
combine wall adapter and USB power inputs. A P-channel
MOSFET, MP1, is used to prevent back conducting into the
5V WALL
ADAPTER
600mA I CHG
USB POWER
500mA I CHG
MP1
D1
4
LTC4054-4.2
BAT
V CC
PROG
3
5
I CHG
+
SYSTEM
LOAD
Li-Ion
USB port when a wall adapter is present and a Schottky
diode, D1, is used to prevent USB power loss through the
1k
MN1
10k
2k
BATTERY
1k pull-down resistor.
Typically a wall adapter can supply more current than the
500mA-limited USB port. Therefore, an N-channel MOSFET,
MN1, and an extra 10k program resistor are used to
405442 F07
Figure 7. Combining Wall Adapter and USB Power
increase the charge current to 600mA when the wall
adapter is present.
405442xf
14
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LTC4054LES5-4.2#TR 功能描述:IC CHARGR BATTERY L-ION TSOT23-5 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