Description
FEATURES
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- NMOS-NMOS Synchronous Buck Converter with 300-kHz Frequency and >95% Efficiency
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- 30-ns Minimum Driver Dead-Time and 99.5% Maximum Effective Duty Cycle
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- 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
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- Integration–Input Current Comparator, With Adjustable Threshold and Hysteresis–Internal Soft-Start
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- Safety–Dynamic Power Management (DPM)
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- Upto19.2-V Battery Voltage
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- 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)
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- 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
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- Charge Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, Etc.
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- Charge Enable Pin
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- <10-μA Battery Current With Adapter Removed
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- <1-mAInput DCIN Current With Adapter Present and Charge Disabled
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- 28-Pin, 5-mm × 5-mm QFN Package
APPLICATIONS
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- Notebook and Ultra-Mobile Computers
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- Portable Data-Capture Terminals
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- Portable Printers
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- Medical Diagnostics Equipment
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- Battery Bay Chargers
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- Battery Backup Systems
