BQ24204

www.ti.com bq24200, bq24201 bq24202, bq24203 bq24204, bq24205 SLUS501C – OCTOBER 2001 – REVISED MARCH 2008 SINGLE-CHIP LI-ION AND LI-POL CHARGE MANAGEMENT IC FOR CURRENT-LIMITED APPLICATIONS FEATURES 1 Designed Specifically to Work With Current-Limited Wall Supplies Ideal for Low Dropout Charger Design for Single-Cell Li-Ion Packs With Coke or Graphite Anodes Integrated PowerFET for 500 mA Integrated Voltage Regulation With 0.5% Accuracy Battery Insertion and Removal Detection Charge Termination by Minimum Current and Time Pre-Charge Conditioning With Safety Timer Sleep Mode for Low-Power Consumption Charge Status Output for LED or Host Processor Interface Indicates Charge-in-Progress, Charge Completion, and Fault Conditions Optional Temperature Monitoring Before and During Charge Small, 8-Pin Power-Pad MSOP Package TYPICAL APPLICATION DESCRIPTION The bq2420x series are simple Li-Ion linear charge management devices targeted at low-cost and space limited charger applications. The bq2420x series offer integrated powerFET, high-accuracy voltage regulation, temperature monitoring, charge status, and charge termination, in a single monolithic device. The bq2420x is designed to work with a current-limited wall-mount transformer and therefore does not provide any current regulation. However, these devices offer a fixed internal current limit to prevent damage to the internal powerFET. A time-limited pre-conditioning phase is provided to condition deeply...