描述 Description

The LP28055 is a complete constant-current/ constant voltage linear charger for single cell lithium-ion batteries. Its ESOP8 package and low external component count make the LP28055 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 LP28055 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 LP28055 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 to indicate charge termination and the presence of an input voltage.

特性 Features

·input voltage up to 28Vinput Over Voltage Protection：7VShort-circuit protectionProgrammable Charge Current Up to 1000mA< 1μA Battery Reverse CurrentProtection of Reverse Connection of BatteryNo MOSFET, Sense Resistor or Blocking Diode RequiredConstant-Current/Constant-Voltage Operation withThermal Regulation to Maximize Charge Rate WithoutRisk of OverheatingProgrammable Charge Termination AC Adapter PowerGood IndicatorESOP8 PackageRoHS Compliant and 100% Lead (Pb)-Free

應(yīng)用 Application

·Portable Media Players/GamePower BankPDA/MIDBluetooth Applications