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The LX2202 Linear Battery Charger is a multi-state (2 stage) Li-Ion battery charger (Constant current / Constant voltage) that is designed to minimize battery charge time (even from current limited sources such as USB) and provide a simplified interface to control battery discharge. LX2202 features up to 2A charging current from an AC adapter and an isolated battery topology to minimize charge time from current limited sources such as USB. A thermal control loop maintains a safe operating temperature at all times.
LX2202 Maximum Ratings
Supply Voltage (VUSB or VDD ) ..........................................................-0.3V to 7V Analog Input Signals (VIDx, VM, SNS) ...................................................-0.3V to 7V Battery Charging Current (IBAT)..........................................................................2A Discharge Current (IVDD).....................................................................................3A Operating Junction Temperature.................................................................. 150°C Storage Temperature Range..........................................................-65°C to 150°C USB Maximum DC Current ..............................................................................500mA USB Maximum Surge Current.................................................................................2A RoHS / Pb-free Peak Package Solder Reflow Temperature (40 second maximum exposure) ........................................................ 260°C(+0, -5)
LX2202 Features
Up to 2A Charge Current Internal Pass Element Can Function as a Reverse Direction Load Switch USB Compliant Charging States using optional USB input Isolated Battery Topology Low RdsON in Discharge Mode Full Capacity Charging True Charge Indicator Wall Supply Regulator Tolerance 5V + 10% Topping Charge with Voltage Monitoring Mode Improved charge/discharge mode detection circuitry Small, High Power 20-lead MLP package Selectable Li-Ion Battery for 4.1V or 4.2V Applications
LX2202 Typical Application
Batteries up to 4AH Ratings (C/2) Cell Phones PDAs Charging Cradles Digital Cameras Low Cost Single Li-Ion Cell Chargers