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BQ2084DBTR-V143 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ2084DBTR-V143 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 71 page  RTT DBT www.ti.com FEATURES DESCRIPTION APPLICATIONS bq2084-V143 SLUS732 – SEPTEMBER 2006 SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312 • Provides Accurate Measurement of Available The bq2084-V143 SBS-compliant gas gauge IC for Charge in Li-Ion and Li-Polymer Batteries battery pack or in-system installation maintains an accurate record of available charge in Li-ion or • Supports the Smart Battery Specification Li-polymer batteries. The bq2084-V143 monitors (SBS) V1.1 capacity and other critical parameters of the battery • Integrated Time Base Removes Need for pack and reports the information to the system host External Crystal with Optional Crystal input controller over a serial communication bus. It is • Works With the TI bq29312 Analog Front-End designed to work with the bq29312 AFE protection IC to maximize functionality and safety and minimize (AFE) Protection IC to Provide Complete Pack component count and cost in smart battery circuits. Electronics for 7.2-V, 10.8-V or 14.4-V Battery Using information from the bq2084-V143, the host Packs With Few External Components controller can manage remaining battery power to • Based on a Powerful Low-Power RISC CPU extend the system run time as much as possible. Core With High-Performance Peripherals The bq2084-V143 uses an integrating converter with • Integrated Flash Memory Eliminates the Need continuous sampling for the measurement of battery for External Configuration EEPROM charge and discharge currents. Optimized for • Uses 16-Bit Delta Sigma Converter for coulomb counting in portable applications, the Accurate Voltage and Temperature self-calibrating integrating converter has a resolution Measurements better than 0.65-nVh and an offset measurement error of less than 1-µV (typical). For voltage and • Measures Charge Flow Using a High temperature reporting, the bq2084-V143 uses a Resolution 16-Bit Integrating Converter 16-bit A-to-D converter. With the bq29312, the – Better Than 0.65-nVh of Resolution onboard ADC also monitors the pack and individual – Self-Calibrating cell voltages in a battery pack and allows the bq2084-V143 to generate the control signals – Offset Error Less Than 1-µV necessary to implement the cell balancing and the • Programmable Cell Modeling for Maximum required safety protection for Li-ion and Li-polymer Battery Fuel Gauge Accuracy battery chemistries. • Drives 3-, 4-, or 5-Segment LED Display for The bq2084-V143 supports the Smart Battery Data Remaining Capacity Indication (SBData) commands and charge-control functions. It • Available in a 38-Pin TSSOP (DBT) Package communicates data using the System Management Bus (SMBus) 2-wire protocol. The data available include the battery's remaining capacity, temperature, voltage, current, and remaining • Notebook PCs run-time predictions. • Medical and Test Equipment The bq2084-V143 provides LED drivers and a • Portable Instrumentation pushbutton input to depict remaining battery capacity from full to empty in 20%, 25%, or 33% increments with a 3-, 4-, or 5-segment display. 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 © 2006, 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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