LP4052
400mA固定电流线性锂电池充电芯片
概述
The LP4070E is a complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries. Its TDFN-6 package and low external component count make the LP4070E ideally suited for portable applications. Furthermore, the device operates from either a USB port or AC adapter. Due to the internal MOSFET architecture,No external sense resistor is needed and no blocking diode is required.Thermal feedback prevents overheating by regulating the charge current to limit the die temperature during high power operation or high ambient temperature conditions.The charge voltage is preset at 4.2V/4.35V and the charge current can be programmed up to 300mA externally with a single resistor. The LP4070E automatically terminates the charge cycle when the charge current drops to 10% programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the LP4070E automatically enters a low current state, dropping the battery drain current to less than 1μA.
Other features include charge current monitor, automatic recharge and charge status indications.
Other features include charge current monitor, automatic recharge and charge status indications.
应用
◆ Portable Media Players/MP3 players
◆ Cellular and Smart mobile phone
◆ PDA/DSC
◆ Bluetooth Applications
◆ Cellular and Smart mobile phone
◆ PDA/DSC
◆ Bluetooth Applications
数据参数
数据参数
最大充电电流(mA)
300
工作电压(V)
3.9~8
过压保护
-
电池电压(V)
4.2
温度检测
-
使能控制
Y
充满指示
-
充电状态指示
Y
电源状态指示
-
电池节数
1
产品特征/功能
CTC,Low size,OTP
封装
TDFN-6(1*1)
特征
特征
◆ Operating input voltage from 3.9 V to 6 V
◆ Programmable Charge Current Up to 300mA
◆ No MOSFET, Sense Resistor or Blocking Diode Required
◆ Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating
◆ Preset 4.2V/4.35V Charge Voltage with ±1% Accuracy
◆ Reverse Leakage Protection Prevents Battery Drainage
◆ Low Battery Leakage Current (less than 1 μA)
◆ 2.9V Trickle Charge Threshold
◆ Automatic Recharge
◆ C/10 Charge Termination
◆ Output OCP
◆ Available in a Low Profile TDFN-6 (1*1mm) Package
◆ Programmable Charge Current Up to 300mA
◆ No MOSFET, Sense Resistor or Blocking Diode Required
◆ Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating
◆ Preset 4.2V/4.35V Charge Voltage with ±1% Accuracy
◆ Reverse Leakage Protection Prevents Battery Drainage
◆ Low Battery Leakage Current (less than 1 μA)
◆ 2.9V Trickle Charge Threshold
◆ Automatic Recharge
◆ C/10 Charge Termination
◆ Output OCP
◆ Available in a Low Profile TDFN-6 (1*1mm) Package
