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BQ24735RGRT Datasheet(PDF) 1 Page - Texas Instruments |
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BQ24735RGRT Datasheet(HTML) 1 Page - Texas Instruments |
1 / 42 page 1 2 3 4 5 6 7 8 9 10 15 14 13 12 11 20 19 18 17 16 ACN ACP CMSRC ACDRV ACOK BATDRV SRN SRP GND LODRV bq24735 bq24735 www.ti.com SLUSAK9 – SEPTEMBER 2011 1-4 Cell Li+ Battery SMBus Charge Controller for Supporting Turbo Boost Mode with N-Channel Power MOSFET Selector Check for Samples: bq24735 1 FEATURES DESCRIPTION The bq24735 is a high-efficiency, synchronous 2 • Adapter and Battery Provides Power to battery charger, offering low component count for System Together to Support Intel® CPU Turbo space-constraint, multi-chemistry battery charging Boost Mode applications. • SMBus Host-Controlled NMOS-NMOS The bq24735 supports Turbo Boost by allowing Synchronous Buck Converter with battery discharge energy to system when system Programmable 615kHz, 750kHz, and 885kHz power demand is temporarily higher than adapter Switching Frequencies maximum power level so that adapter will not crash. • Automatic N-channel MOSFET Selection of The bq24735 utilizes two charge pumps to separately System Power Source from Adapter or Battery drive n-channel MOSFETs (ACFET, RBFET and Driven by Internal Charge Pumps BATFET) for automatic system power source • Enhanced Safety Features for Over Voltage selection. Protection, Over Current Protection, Battery, SMBus controlled input current, charge current, and Inductor and MOSFET Short Circuit Protection charge voltage DACs allow for very high regulation • Programmable Input Current, Charge Voltage, accuracies that can be easily programmed by the Charge Current Limits system power management micro-controller. – ±0.5% Charge Voltage Accuracy up to 19.2V The bq24735 uses internal input current register or – ±3% Charge Current Accuracy up to 8.128A external ILIM pin to throttle down PWM modulation to reduce the charge current. – ±3% Input Current Accuracy up to 8.064A – ±2% 20x Adapter Current or Charge Current The bq24735 charges one, two, three or four series Amplifier Output Accuracy Li+ cells, and is available in a 20-pin, 3.5x3.5 mm2 QFN package. • Programmable Battery Depletion Threshold, and Battery LEARN Function PIN CONFIGURATION • Programmable Adapter Detection and Indicator • Integrated Soft Start • Integrated Loop Compensation • Real Time System Control on ILIM pin to Limit Charge Current • AC Adapter Operating Range 4.5V-24V • 5 µA Off-State Battery Discharge Current • 0.65mA (0.8mA max) Adapter Standby Quiescent Current • 20-pin 3.5 x 3.5 mm2 QFN Package APPLICATIONS • Portable Notebook Computers, UMPC, Ultra-Thin Notebook, and Netbook • Handheld Terminal • Industrial and Medical Equipment • Portable Equipment 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. 2 Intel is a registered trademark of Intel. PRODUCTION DATA information is current as of publication date. Copyright © 2011, 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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