BQ24313

bq24313 bq24315 www.ti.com............................................................................................................................................... SLUS817A – MARCH 2008 – REVISED NOVEMBER 2008 OVERVOLTAGE AND OVERCURRENT PROTECTION IC AND Li+ CHARGER FRONT-END PROTECTION IC FEATURES 1 23 Provides Protection for Three Variables: – Input Overvoltage, with Rapid Response in < 1 µs – User-Programmable Overcurrent with Current Limiting – Battery Overvoltage 30V Maximum Input Voltage Supports up to 1.5A Input Current Robust Against False Triggering Due to Current Transients Thermal Shutdown Enable Input Status Indication – Fault Condition 5.5V LDO Mode Voltage Regulation Available in Space-Saving Small 8 Lead 2mm ×2mm SON APPLICATIONS Mobile Phones and Smart Phones PDAs MP3 Players Low-Power Handheld Devices Bluetooth™ Headsets DESCRIPTION The bq24313 and bq24315 are highly integrated circuits designed to provide protection to Li-ion batteries from failures of the charging circuit. The IC continuously monitors the input voltage, the input current, and the battery voltage. The output acts as a linear regulator. The output is regulated to VO(REG) for inputs between VO(REG) and the overvoltage threshold. If an input overvoltage condition occurs, the IC immediately removes power from the charging circuit by turning off an internal switch. In the case of an overcurrent condition, it limits the system current at the threshold value, a...