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参数资料
| 型号： | LTC4066EPF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/28页 |
| 文件大小： | 0K |
| 描述： | IC USB POWER MANAGER 24-UTQFN |
| 标准包装： | 2,500 |
| 功能： | 电源管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 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： | 24-UFQFN 裸露焊盘 |
| 供应商设备封装： | 24-UTQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
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LTC4066/LTC4066-1
OPERATION
The LTC4066/LTC4066-1 are complete PowerPath TM
controllers for battery-powered USB applications. The
LTC4066/LTC4066-1 are designed to receive power from a
USB source, a wall adapter or a battery. It can then deliver
power to an application connected to the OUT pin and a
battery connected to the BAT pin (assuming that an external
supply other than the battery is present). Power supplies
that have limited current resources (such as USB V BUS
supplies) should be connected to the IN pin which has a
programmable current limit. Battery charge current will
be adjusted to ensure that the sum of the charge current
and load current does not exceed the programmed input
current limit.
An ideal diode function provides power from the battery
when output/load current exceeds the input current limit or
when input power is removed. Powering the load through
the ideal diode instead of connecting the load directly to
the battery allows a fully charged battery to remain fully
charged until external power is removed. Once external
power is removed, the output drops until the ideal diode
is forward biased. The forward biased ideal diode will then
provide the output power to the load from the battery.
WALL
ADAPTER
Furthermore, powering switching regulator loads from the
OUT pin (rather than directly from the battery), results in
shorter battery charge times. This is due to the fact that
switching regulators typically require constant input power.
When this power is drawn from the OUT pin voltage (rather
than the lower BAT pin voltage) the current consumed
by the switching regulator is lower, leaving more current
available to charge the battery.
The LTC4066/LTC4066-1 also have the ability to receive
power from a wall adapter. Wall adapter power can be con-
nected to the output (load side) of the LTC4066/LTC4066-1
through an external device such as a power Schottky or
FET, as shown in Figure 1. The LTC4066/LTC4066-1 have
the unique ability to use the output, which is powered
by the wall adapter, as a path to charge the battery while
providing power to the load. A wall adapter comparator
on the LTC4066/LTC4066-1 can be con?gured to detect
the presence of the wall adapter and shut off the connec-
tion to the USB to prevent reverse conduction out to the
USB bus.
PowerPath is a trademark of Linear Technology Corporation.
USB V BUS
9
IN
CURRENT LIMIT
CONTROL
ENABLE
OUT
1,3,8
LOAD
CHRG
CONTROL
IDEAL
DIODE
20
WALL
+
BAT
1.25V
–
2,4,5
+
Li-Ion
4066 F01
Figure 1. Simpli?ed Block Diagram—PowerPath
4066fc
12
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| LTC4066EUF#PBF | 功能描述:IC USB POWER MANAGER 24-QFN 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 |
| LTC4066EUF#TRPBF | 功能描述:IC USB POWER MANAGER 24-QFN 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 |
| LTC4066EUF-1#PBF | 功能描述:IC USB POWER MANAGER 24-QFN 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 |
| LTC4066EUF-1#TRPBF | 功能描述:IC USB POWER MANAGER 24-QFN 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 |
| LTC4067 | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with OVP and Li-Ion/Polymer Charger |
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