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BQ24765RUVT Datasheet(PDF) 1 Page - Texas Instruments |
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BQ24765RUVT Datasheet(HTML) 1 Page - Texas Instruments |
1 / 36 page DCINP PGND CSSN CSSP VREF PHASE PHASE PHASE BOOT DCINA bq24765 34 LD QFN TOP VIEW DCINP DCINP VDDP ICOUT 1 34 7 29 23 2 3 4 5 6 28 27 26 25 24 33 32 31 ICREF ACIN CSOP CSON 9 21 8 22 EAO EAI FBO VFB AGND ACOK 10 11 12 20 19 18 30 13 14 15 16 17 bq24765 www.ti.com SLUS999 – NOVEMBER 2009 SMBus-Controlled Multi-Chemistry Battery Charger With Integrated Power MOSFETs Check for Samples :bq24765 1 FEATURES – < 10- μA Battery Current with Adapter Removed • Integrated Power MOSFETs, NMOS-NMOS, Synchronous Buck Converter – < 1 mA Input DCINA Current When Adapter Present and Charge Disabled • >95% Efficiency • 34-pin, 3.5mmx7mm QFN Package • Frequency 700kHz Allows Smaller Inductor (5mm x 5mm) APPLICATIONS • Thermal Regulation Loop for Safety, Limit TJ = • Notebook and Ultra-Mobile Computers 120°C • Portable Data-Capture Terminals • Adaptive Driver Dead-time and 99.5% • Portable Printers Maximum Effective Duty Cycle • Medical Diagnostics Equipment • High-Accuracy Voltage and Current Regulation • Battery Bay Chargers – ±0.5% Charge Voltage Accuracy • Battery Back-up Systems – ±3% Charge Current Accuracy – ±3% Adapter Current Accuracy DESCRIPTION – ±2% Input Current Sense Amp Accuracy The bq24765 is a high-efficiency, synchronous • Integration battery charger with two integrated 30m Ω NMOS power MOSFETs, and an integrated input current – Integrated Power MOSFETs comparator, offering low component count for – Input Current Comparator space-constraint, multi-chemistry battery charging – Internal Soft-Start applications. Input current, charge current, and • Safety charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the – Thermal Regulation Loop and Thermal system power management micro-controller using Shutdown SMBus. The bq24765 has switching frequency of – Dynamic Power Management (DPM) 700kHz. The bq24765 charges 2, 3, or 4 series Li+ – Power FETs Over Current Protection cells, and is available in a 34-pin, 3.5mmx7mm QFN package. • 7 V–24 V AC/DC-Adapter Operating Range • Simplified SMBus Control – 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+, LiFePO4, NiCd, NiMH, Lead Acid (2, 3, and 4 Li-Ion Cells) • Charge Enable Pin (CE) • Energy Star Low Iq 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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