The LP4054 is a complete constant-current/constant- voltage linear charger for single cell lithium-ion batteries. Its SOT23-5 package and low external component count make the LP4054 ideally suited for portable applications. Furthermore, the LP4054 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. The LP4054 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the LP4054 automatically enters a low current state, dropping the battery drain current to less than 1μA. The device provides various safety features for battery charging, including input under voltage lockout (UVLO), battery reverse connection protection. The LP4054 is available in a SOT23-5 package.
应用
◆ Portable Media Players/MP3 players ◆ Cellular and Smart mobile phone ◆ PDA/DSC ◆ Bluetooth Applications
数据参数
数据参数
最大充电电流(mA)
600
工作电压(V)
4.5~8
过压保护
-
电池电压(V)
4.2
温度检测
-
使能控制
-
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,Full voltage±1%Accuracy
封装
SOT23-5
特征
特征
◆ Programmable Charge Current Up to 600mA ◆ No MOSFET, Sense Resistor or Blocking Diode Required ◆ Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize ◆ Charge Rate Without Risk of Overheating ◆ 4.2V Charge Voltage with ± 1% Accuracy ◆ Charge Current Monitor Output for Gas Gauging ◆ Automatic Recharge ◆ 2.8V Trickle Charge Threshold ◆ C/10 Charge Termination ◆ Charging OTP ◆ Package in SOT23-5
