BQ24155

bq24155 www.ti.com SLUS942 – FEBRUARY 2010 Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance Check for Samples: bq24155 FEATURES 1 2 Charge Faster than Linear Chargers High-Accuracy Voltage and Current Regulation – Input Current Regulation Accuracy: ±5% (100 mA and 500 mA) – Charge Voltage Regulation Accuracy: ±0.5% (25°C), ±1% (0°C-125°C) – Charge Current Regulation Accuracy: ±5% High-Efficiency Mini-USB/AC Battery Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs 20-V Absolute Maximum Input Voltage Rating 6-V Maximum Operating Input Voltage Built-In Input Current Sensing and Limiting Integrated Power FETs for Up To 1.25-A Charge Rate Programmable Charge Parameters through I2C™ Compatible Interface (up to 3.4 Mbps): – Input Current – Fast-Charge/Termination Current – Charge Voltage (3.5 V to 4.44 V) – Safety Timer with Reset Control – Termination Enable Synchronous Fixed-Frequency PWM Controller Operating at 3 MHz with 0% to 99.5% Duty Cycle Automatic High Impedance Mode for Low Power Consumption Robust Protection – Reverse Leakage Protection Prevents Battery Drainage – Thermal Regulation and Protection – Input/Output Overvoltage Protection Status Output for Charging and Faults USB Friendly Boot-Up Sequence Automatic Charging Power Up System without Battery 3.5 mm x 3.5 mm 14-Pin QFN Package APPLICATIONS Mobile and Smart Phones MP3 Players Handheld Devices DESCRIPTION The bq24155 is a compact, ...