The bq2406x series are highly integrated Li-Ion and Li-Pol linear chargers, targeted at space-limited portable applications. The bq2406x series offers a variety of safety features and functional options, while still implementing a complete charging system in a small package. The battery is charged in three phases: conditioning, constant or thermally regulated current, and constant voltage. Charge is terminated based on minimum current. An internal programmable charge timer provides a backup safety feature for charge termination and is dynamically adjusted during the thermal regulation phase. The bq2406x automatically re-starts the charge if the battery voltage falls below an internal threshold; sleep mode is set when the external input supply is removed. Multiple versions of this device family enable easy design of the bq2406x in cradle chargers or in the end equipment, while using low cost or high-end AC adapters.

• Ideal for Low-Dropout Designs for Single-Cell Li-Ion or Li-Pol Packs in Space Limited Applications
• Integrated Power FET and Current Sensor for up to 1-A Charge Applications
• Reverse Leakage Protection Prevents Battery Drainage
• ±0.5% Voltage Regulation Accuracy
• Thermal Regulation Maximizes Charge Rate
• Charge Termination by Minimum Current and Time
• Precharge Conditioning With Safety Timer
• Status Outputs for LED or System Interface Indicate Charge, Fault, and Power Good Outputs
• Short-Circuit and Thermal Protection
• Automatic Sleep Mode for Low Power Consumption
• Small 3×3 mm MLP Package
• Selectable Battery Insertion and Battery Absent Detection
• Input Overvoltage Protection
  • 6.5 V and 10.5 V Options
• APPLICATIONS
  • PDA, MP3 Players, Digital Cameras
  • Internet Appliances and Handheld Devices