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BQ2085DBTRG4 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ2085DBTRG4 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 56 page  bq2085 SLUS541 – OCTOBER 2002 SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311 1 www.ti.com FEATURES D Provides Accurate Measurement of Available Charge in Li-Ion and Li-Polymer Batteries D Supports the Smart Battery Specification (SBS) V1.1 D Integrated Time Base Removes Need for External Crystal D Works With the TI bq29311 Analog Front End (AFE) Protection IC to Provide Complete Pack Electronics for 10.8-V or 14.4-V Battery Packs With Few External Components D Based on a Powerful Low-Power RISC CPU Core With High-Performance Peripherals D Integrated FLASH Memory Eliminates the Need for External Configuration EEPROM D Measures Charge Flow Using a High Resolution 16-Bit Integrating Converter – Better Than 3-nVh of Resolution – Self-Calibrating – Offset Error Less Than 1- µV D Uses 16-Bit Delta Sigma Converter for Accurate Voltage and Temperature Measurements D Programmable Cell Modeling for Maximum Battery Fuel Gauge Accuracy D Drives 3-, 4-, or 5-Segment LED Display for Remaining Capacity Indication D 38-Pin TSSOP (DBT) APPLICATIONS D Notebook PCs D Medical and Test Equipment D Portable Instrumentation DESCRIPTION The bq2085 SBS-compliant gas gauge IC for battery pack or in-system installation maintains an accurate record of available charge in Li-ion or Li-polymer batteries. The bq2085 monitors capacity and other critical parameters of the battery pack and reports the information to the system host controller over a serial communication bus. It is designed to work with the bq29311 analog front-end (AFE) protection IC to maximize functionality and safety and minimize component count and cost in smart battery circuits. Using information from the bq2085, the host controller can manage remaining battery power to extend the system run time as much as possible. BLOCK DIAGRAM ADC Voltage Sense Resistor (10 m Ω - 20 mΩ) Pack– Integrating ADC Coulomb Counting Temp Sensor 512 Bytes Config. FLASH EPROM bq2085 Level Translator bq29311 LDO Glueless Interface Cell Inputs Safety Control SMBus Pack+ Supply Voltage Li-Ion Cells – + Charge/Discharge Power FETs – + – + 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 2002, 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. |
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