bq24022

www.ti.com bq24020, bq24022, bq24023 bq24024, bq24025, bq24026 bq24027 SLUS549E – DECEMBER 2002 – REVISED NOVEMBER 2007 SINGLE-CHIP, LI-ION AND LI-POL CHARGER IC WITH AUTONOMOUS USB-PORT AND AC-ADAPTER SUPPLY MANAGEMENT (bqTINY™-II) FEATURES 1 2 Small 3 mm × 3 mm MLP Package Charges and powers Systems from Either AC Adapter or USB With Autonomous power-Source Selection Integrated USB Control With Selectable 100 mA and 500 mA Charge Rates Ideal for Low-Dropout Charger Designs for Single-Cell Li-Ion or Li-pol Packs in Space Limited portable applications Integrated power FET and Current Sensor for Up to 1-A Charge applications From AC Adapter Precharge Conditioning With Safety Timer power Good (AC Adapter Present) Status Output Optional Battery Temperature Monitoring Before and During Charge Automatic Sleep Mode for Low-power Consumption APPLICATIONS PDAs, MP3 Players Digital Cameras Internet appliances Smartphones DESCRIPTION The bqTINY-II series are highly-integrated, flexible Li-Ion linear charge and system power management devices for space-limited charger applications. In a single monolithic device, the bqTINY-II offers integrated USB-port and ac-adapter supply management with autonomous power-source selection, power-FET and current-sensor interfaces, high-accuracy current and voltage regulation, charge status, and charge termination. The bqTINY-II automatically selects the USB-port or the ac-adapter as the power source for the system. In the U...