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参数资料
| 型号： | LTC4066EPF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 23/28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
APPLICATIONS INFORMATION
V TH ( Adapter ) = V WALL ? ? 1 +
?
Current Limit Undervoltage Lockout
An internal undervoltage lockout circuit monitors the
input voltage and disables the input current limit circuits
until V IN rises above the undervoltage lockout threshold.
The current limit UVLO circuit has a built-in hysteresis of
125mV. Furthermore, to protect against reverse current in
the power MOSFET, the current limit UVLO circuit disables
the current limit (i.e., forces the input power path to a high
impedance state) if V OUT exceeds V IN . If the current limit
UVLO comparator is tripped, the current limit circuits will
not come out of shutdown until V OUT falls 50mV below
the V IN voltage.
Charger Undervoltage Lockout
An internal undervoltage lockout circuit monitors the V OUT
voltage and disables the battery charger circuits until
V OUT rises above the undervoltage lockout threshold. The
battery charger UVLO circuit has a built-in hysteresis of
125mV. Furthermore, to protect against reverse current
in the power MOSFET, the charger UVLO circuit keeps the
charger shutdown if V BAT exceeds V OUT . If the charger UVLO
comparator is tripped, the charger circuits will not come
out of shutdown until V OUT exceeds V BAT by 50mV.
Suspend
The LTC4066/LTC4066-1 can be put in suspend mode by
forcing the SUSP pin greater than 1.2V. In suspend mode
the ideal diode function from BAT to OUT is kept alive.
If power is applied to the OUT pin externally (i.e., a wall
adapter is present) then charging will be unaffected. Current
drawn from the IN pin is reduced to 50μA. Suspend mode
is intended to comply with the USB Power Speci?cation
mode of the same name.
Selecting WALL Input Resistors
The WALL input pin identi?es the presence of a wall adapter.
This information is used to disconnect the input pin, IN,
from the OUT pin in order to prevent back conduction to
whatever may be connected to the input. It also forces the
ACPR pin low when the voltage at the WALL pin exceeds
the input threshold. The WALL pin has a 1.225V rising
threshold and approximately 30mV of hysteresis.
The wall adapter detection threshold is set by the follow-
ing equation:
? R 1 ?
? R 2 ?
V HYST WALL ( HYST ) ? ? 1 +
( Adapter ) = V
?
Shutdown
The LTC4066/LTC4066-1 can be shutdown by forcing the
?
?
R 1 ?
R 2 ?
SHDN pin greater than 1.2V. In shutdown, the currents
drawn from IN, OUT and BAT are decreased to less than
2.5μA and the internal battery charge timer and end-of-
charge comparator output are reset. All power paths are
where V TH (Adapter) is the wall adapter detection threshold,
V WALL is the WALL pin rising threshold (typically 1.225V),
R1 is the resistor from the wall adapter input to WALL and
R2 is the resistor from WALL to GND.
put in a high impedance state.
4066fc
23
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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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