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BQ24702PW Datasheet(PDF) 1 Page - Texas Instruments |
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BQ24702PW Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 32 page  bq24702, bq24703 SLUS553D − MAY 2003 − REVISED JULY 2005 MULTICHEMISTRY BATTERY CHARGER CONTROLLER AND SYSTEM POWER SELECTOR (6,60 mm x 7,90 mm) Actual Size 1 www.ti.com FEATURES D Dynamic Power Management, DPM Minimizes Battery Charge Time D Integrated Selector Supports Battery Conditioning and Smart Battery Learn Cycle D Zero Volt Operation D Selector Feedback Circuit Ensures Break-Before-Make Transition D ±0.4% Charge Voltage Accuracy, Suitable for Charging Li-Ion Cells D ±4% Charge Current Accuracy D 300-kHz Integrated PWM Controller for High-Efficiency Buck Regulation D Depleted Battery Detection and Indication to Protect Battery From Over Discharge D 20-µA Sleep Mode Current for Low Battery Drain D 24-Pin TSSOP Package and 5 mm × 5 mm QFN package (bq24703 only) DESCRIPTION The bq24702/bq24703 is a highly integrated battery charge controller and selector tailored for notebook and sub-notebook PC applications. The bq24702/bq24703 uses dynamic power management (DPM) to minimize battery charge time by maximizing use of available wall-adapter power. This is achieved by dynamically adjusting the battery charge current based on the total system (adapter) current. The bq24702/bq24703 uses a fixed frequency, pulse width modulator (PWM) to accurately control battery charge current and voltage. Charge current limits can be programmed from a keyboard controller DAC or by external resistor dividers from the precision 5-V, ±0.6%, externally bypassed voltage reference (VREF), supplied by the bq24702/bq24703. 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 ACDET ACPRES ACSEL BATDEP SRSET ACSET VREF ENABLE BATSET COMP ACN ACP ACDRV BATDRV VCC PWM VHSP ALARM VS GND SRP SRN IBAT BATP bq24702, bq24703 PW PACKAGE (TOP VIEW) 8 9 10 11 12 13 14 ACSEL ACPRES ACDET ACDRV BATDRV NC VCC ACN ACP NC NC BATP IBAT NC 28 27 26 25 24 23 22 bq24703 RHD PACKAGE (BOTTOM VIEW) NC − No internal connection Copyright 2003 − 2004, Texas Instruments Incorporated 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. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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