深圳市科瑞芯电子有限公司

微源半导体 LP4054HB5F SOT23-5 600mA独立线性锂离子电池充电器

General Description

The LP4054HB5F 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 LP4054HB5F 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.

Features
◆ 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

Applications
◆ Portable Media Players/MP3 players
◆ Cellular and Smart mobile phone
◆ PDA/DSC
◆ Bluetooth Applications

LP4054HB5F规格书（部分）