bq2085

bq2085 SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311 SLUS541 – OCTOBER 2002 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 BLOCK DIAGRAM 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 wi...