bq25012

www.ti.com bq25010 bq25011 bq25012 SLUS615B – DECEMBER 2004 – REVISED JULY 2007 SINGLE-CHIP CHARGER AND DC/DC CONVERTER IC FOR PORTABLE APPLICATIONS (bq2501x) FEATURES 1 2 Li-Ion Or Li-Pol Charge Management and Synchronous DC-DC Power Conversion In a Single Chip Optimized for Powering Bluetooth™ Headsets and Accessories Charges and Powers the System from Either the AC Adapter or USB with Autonomous Power Source Selection Integrated USB Charge Control with Selectable 100 mA and 500 mA Charge Rates Integrated Power FET and Current Sensor for Up to 500 mA Charge Applications AND 100 mA DC-DC Controller with Integrated FETs Reverse Leakage Protection Prevents Battery Drainage Automatic Power Save Mode For High Efficiency at Low Current, or Forced PWM for Frequency Sensitive Applications 3.5 mm × 4.5 mm QFN Package APPLICATIONS Bluetooth™ Headsets Bluetooth™ Accessories Low-Power Handheld Devices DESCRIPTION The bq2501x series are highly integrated charge and power management devices targeted at space-limited bluetooth applications. The bq2501x series offer integrated power FET and current sensor for charge control, reverse blocking protection, high accuracy current and voltage regulation, charge status, charge termination, and a highly efficient and low-power dc-dc converter in a small package. The bq2501x charges the battery in three phases: conditioning, constant current and constant voltage. Charge is terminated based on minimum current. An internal ch...