LP4053 1A Standalone Linear Li-Ion Battery Charger

PublishTime： 2023-12-28 Manufacturer： LPSemi Type： Datasheet Language： English

●General Description
■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.
●Features
■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

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