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BQ26500PW Datasheet(PDF) 1 Page - Texas Instruments |
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BQ26500PW Datasheet(HTML) 1 Page - Texas Instruments |
1 / 30 page bq26500 SLUS567A − JUNE, 2003 − REVISED OCTOBER 2003 SINGLECELL LIION AND LIPOL BATTERY GAS GAUGE IC FOR HANDHELD APPLICATIONS (bqJUNIORt FAMILY) 1 www.ti.com FEATURES D Reports Accurate State-of-Charge in Li-Ion and Li-Pol Cells, No System Processor Calculations Needed D Reports Cell Temperature and Voltage D High-Accuracy Coulometric Charge and Discharge Current Integration with Automatic Offset Cancellation D Requires No Offset Calibration D Programmable Input/Output Port D Internal Time-Base Eliminates External Crystal Oscillator D Four Automatic Low-Power Operating Modes − Active: < 100 µA − Sleep: < 2.5 µA − Ship: < 1.7 µA − Hibernate: < 1.5 µA D Small 8-Pin TSSOP Package APPLICATIONS D PDAs D Smart Phones D MP3 Players D Digital Cameras D Internet Appliances D Handheld Devices DESCRIPTION The bq26500, the first in the bqJUNIOR t family of advanced gas gauge device for handhald applications, is a highly accurate standalone single-cell Li-Ion and Li-Pol battery capacity monitoring and reporting device targeted at space limited portable applications. The device monitors a voltage drop across a small current sense resistor connected in series with the battery to determine charge and discharge activity of the battery. Compensations for battery temperature, self-discharge, and rate of discharge are applied to the charge counter to provide available capacity across a wide range of operating conditions. Battery capacity is automatically recalibrated, or learned, in the course of a discharge cycle from full to empty. Internal registers include available capacity, cell temperature and voltage, state-of-charge, and status and control registers. The bq26500 can operate directly from single-cell Li-Ion and Li-Pol batteries and communicates to the system over a simple one-wire bi-directional serial interface. The 5-kbits/s HDQ bus interface reduces communication overhead in the external microcontroller. 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. Copyright 2003, 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. UDG−03038 SIMPLIFIED APPLICATION 1 2 3 4 8 7 6 5 GPIO SRP SRN BAT RBI VCC VSS HDQ bq26500 Protection Controller + HDQ PACK− PACK+ Battery Pack Li-Ion or Li-Pol |
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