BQ24745 4 cell level 2 Buck Original Battery Charger IC

FEATURES

• NMOS-NMOS Synchronous Buck Converter with 300-kHz Frequency and >95% Efficiency
• 30-ns Minimum Driver Dead-Time and 99.5% Maximum Effective Duty Cycle
• High-Accuracy Voltage and Current Regulation–±0.5% Charge Voltage Accuracy–±3%Charge Current Accuracy–±3%Adapter Current Accuracy–±2%Input Current Sense Amp Accuracy
• Integration–Input Current Comparator, With Adjustable Threshold and Hysteresis–Internal Soft-Start
• Safety–Dynamic Power Management (DPM)
• Upto19.2-V Battery Voltage
• Simplified SMBus Control Interface–Charge Voltage DAC (1.024 V–19.2 V)–Charge Current DAC (128 mA–8.064 A)–Adapter Current Limit DPM DAC (256 mA–11.008 A)
• Status and Monitoring Outputs–AC/DC Adapter Present With Adjustable Voltage Threshold–Input Current Comparator With Adjustable Threshold and Hysteresis–Current Sense Amplifier for Current Drawn From Input Source
• Charge Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, Etc.
• Charge Enable Pin
• <10-μA Battery Current With Adapter Removed
• <1-mAInput DCIN Current With Adapter Present and Charge Disabled
• 28-Pin, 5-mm × 5-mm QFN Package

APPLICATIONS

• Notebook and Ultra-Mobile Computers
• Portable Data-Capture Terminals
• Portable Printers
• Medical Diagnostics Equipment
• Battery Bay Chargers
• Battery Backup Systems