LP28300

Preliminary Datasheet LP28300 2A Synchronous Buck Li-ion Charger General Description The LP28300 is a 2A Li-Ion battery charger intended for5V wall adapters. It utilizes a 1.5MHz synchronous buck converter topology to reduce power dissipation during charging. Low power dissipation, an internal MOSFET allow a physically small charger that can be embedded in a wide range of handheld applications. The LP28300 includes complete charge termination circuitry, automatic recharge and a ±1% 4.2V float voltage. Input short-circuit protection is included so no blocking diode is required. Battery charge current, charge timeout and end-of-charge indication parameters are set with external components. Additional features include shorted cell detection, temperature qualified charging and overvoltage protection. The LP28300 is available in a low profile (0.75mm) 10-lead(3mm × 3mm) DFN package. Features ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ Very Low Power Dissipation 2A Maximum Charge Current No External MOSFETs and Blocking Diode Required Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port Drainage Charge Current Thermal Regulation Status Outputs for LED or System Interface Optional Battery Temperature Monitoring Before and During Charge Automatic Sleep Mode for Low-Power Consumption Available in 3mm × 3mm TDFN-10 Package RoHS Compliant and 100% Lead (Pb)-Free Order Information LP2...