LP4052
400mA固定电流线性锂电池充电芯片
概述
The LP4081 is an ultra-low power linear charger targeting at wearable applications protected up to 16V input voltage.
It contains a linear charger to charge the Li-ion battery. The charger has an ideal-diode mode for high efficiency and low heat operation. The LP4081 integrates the power path management function to support SoC powerup even with a deeply-discharged battery. The LP4081 features 150mΩ low Rds,on of the BAT_FET from the battery to the system to achieve high discharge efficiency and low heat under full load range. An I2C interface is offered for programmability and flexibility of the device.The LP4081 provides rich protections, including the input Under-volage lockout protection (UVLO), input overvoltage protection (OVP) and system short circuit protection (SCP).The typical quiescent current of LP4081 is 0.6-µA and the battery current is reduced to 0.4-uA in ship mode.The whole system is in a 12-pin 2 X 2 QFN package.
It contains a linear charger to charge the Li-ion battery. The charger has an ideal-diode mode for high efficiency and low heat operation. The LP4081 integrates the power path management function to support SoC powerup even with a deeply-discharged battery. The LP4081 features 150mΩ low Rds,on of the BAT_FET from the battery to the system to achieve high discharge efficiency and low heat under full load range. An I2C interface is offered for programmability and flexibility of the device.The LP4081 provides rich protections, including the input Under-volage lockout protection (UVLO), input overvoltage protection (OVP) and system short circuit protection (SCP).The typical quiescent current of LP4081 is 0.6-µA and the battery current is reduced to 0.4-uA in ship mode.The whole system is in a 12-pin 2 X 2 QFN package.
应用
◆ Wearable
◆ Fitness Application
◆ Smart Watch
◆ Fitness Application
◆ Smart Watch
数据参数
数据参数
最大充电电流(mA)
470
工作电压(V)
2.6~16
过压保护
5.7
电池电压(V)
4.0~4.5
温度检测
-
使能控制
-
充满指示
-
充电状态指示
-
电源状态指示
-
电池节数
1
产品特征/功能
Ultra-high Efficiency ,I2C, Power Path ,±0.3% Voltage Accuracy
封装
QFN-12(2*2)
特征
特征
◆ Input over-voltage protected up to 16V
◆ Charge Management
- Programmable charge current up to 1A
- Programmable floating voltage with 0.3% accuracy
- Programmable trickle charge and termination current
◆ Charge and discharge current monitor
◆ Automatic re-charge and thermal foldback
◆ I2C bus to SoC with an interrupt pin
◆ Low drop-out fast charge function and low heat
◆ Power path management
◆ Charge safety timer and watchdog
◆ High accuracy current mirror for gauge application
◆ Rich protections: UVLO, OVP, SCP
◆ 0.6-µA ultra-low iq in standby mode
◆ 0.4-µA ultra-low iq in ship mode
◆ 2mm Χ 2mm QFN-12 package
◆ RoHS Compliant and 100% Lead (Pb) Free
◆ Charge Management
- Programmable charge current up to 1A
- Programmable floating voltage with 0.3% accuracy
- Programmable trickle charge and termination current
◆ Charge and discharge current monitor
◆ Automatic re-charge and thermal foldback
◆ I2C bus to SoC with an interrupt pin
◆ Low drop-out fast charge function and low heat
◆ Power path management
◆ Charge safety timer and watchdog
◆ High accuracy current mirror for gauge application
◆ Rich protections: UVLO, OVP, SCP
◆ 0.6-µA ultra-low iq in standby mode
◆ 0.4-µA ultra-low iq in ship mode
◆ 2mm Χ 2mm QFN-12 package
◆ RoHS Compliant and 100% Lead (Pb) Free
