bq25050

bq25050 www.ti.com SLUSA33 – MARCH 2010 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, External Power Path Control, and Single Input Interface Check for Samples: bq25050 FEATURES 1 30V input Rating, With 10.5V Over-Voltage Protection (OVP) FET Controller for External Battery FET for External Power Path Control (BGATE) Input Voltage Dynamic Power Management 50mA integrated Low Dropout Linear Regulator (LDO) Programmable Charge Current Through Single Input Interface (CTRL) 0.5% Battery Voltage Regulation Accuracy 7% Charge Current Regulation Accuracy Thermal Regulation and Protection Battery NTC Monitoring During Charge and Discharge Status Indication – Charging/Done and Temperature Faults Available in small 2mm × 3mm 10 Pin SON Package APPLICATIONS Smart Phones Mobile Phones Portable Media Players Low Power Handheld Devices TYPICAL APPLICATION CIRCUIT DESCRIPTION The bq25050 is a highly integrated Li-Ion linear battery charger targeted at space-limited portable applications. It operates from either a USB port or AC Adapter and charges a single-cell Li-Ion battery with up to 1A of charge current. The 30V input voltage range with input over-voltage protections supports low-cost unregulated adapters. The bq25050 has a single power output that charges the battery. The system load is connected to OUT. The low-battery system startup circuitry maintains OUT greater than 3.4V whenever an input source is connected. This allows ...