描述 Description

The LP28053A is a complete constant-current/ constant voltage linear charger for single cell lithium-ion battery. Its ESOP8 package and low external component count make the LP28053A ideally suited for portable applications. 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 ISET programmed externally with a single resistor. The LP28053A automatically terminates the charge cycle when the charge current drops to 1/10 setting current value after the final float voltage is reached. When the input supply is removed, the LP28053A automatically enters a low current state, dropping the battery drain current to less than < 1μA. Other features include charge current monitor, under voltage lockout, automatic recharge and a status pin.

特性 Features

·? Input Voltage up to 28V
·? Input Over Voltage Protection：7V
·? Short-circuit protection
·? Programmable Charge Current Up to 1000mA
·? < 1μA Battery Reverse Current
·? Protection of Reverse Connection of Battery
·? No MOSFET, Sense Resistor or Blocking Diode
·Required
·? Constant-Current/Constant-Voltage Operation
·with Thermal Regulation to Maximize Charge
·Rate Without Risk of Overheating
·? ESOP-8 Package
·? RoHS Compliant and 100% Lead (Pb)-Free

應(yīng)用 Application

·? Portable Media Players/Game
·? Power Bank
·? Bluetooth Applications
·? PDA/MID