LP4052
400mA固定电流线性锂电池充电芯片
概述
The LP4053 is a complete constant-current/constant- voltage linear charger for single cell lithium-ion batteries. Its SOT23-6/ESOP-8 package and low external component count make the LP4053 ideally suited for portable applications. Furthermore, the LP4053 is specifically designed to work within USB power specifications. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. When the input supply (wall adapter or USB supply) is removed, the LP4053 automatically enters a low current state, dropping the battery drain current to less than 1μA. Other features include charge current monitor, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage.
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)
1000
工作电压(V)
4.5~10
过压保护
-
电池电压(V)
4.2
温度检测
-
使能控制
-
充满指示
Y
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,OTP,Full voltage±1%Accuracy(Floating charge type)
封装
SOT23-6/ESOP8
特征
特征
◆ Programmable Charge Current Up to 1A
◆ No MOSFET, Sense Resistor or Blocking Diode Required
◆ Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize
◆ Protection of Reverse Connection of Battery
◆ Charge Rate Without Risk of Overheating
◆ 4.2V Charge Voltage with ± 1% Accuracy
◆ Charge Current Monitor Output for Gas Gauging
◆ Automatic Recharge
◆ 2.9V Trickle Charge Threshold
◆ Charging OTP
◆ Package in SOT23-6/ESOP-8
◆ No MOSFET, Sense Resistor or Blocking Diode Required
◆ Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize
◆ Protection of Reverse Connection of Battery
◆ Charge Rate Without Risk of Overheating
◆ 4.2V Charge Voltage with ± 1% Accuracy
◆ Charge Current Monitor Output for Gas Gauging
◆ Automatic Recharge
◆ 2.9V Trickle Charge Threshold
◆ Charging OTP
◆ Package in SOT23-6/ESOP-8
