BQ2085DBTR-V1P3 ,SBS 1.1 Compliant Gas Gauge With Integrated Oscillator For Use With The bq29311 SLUS598 − FEBRUARY 2004Terminal FunctionsTERMINALI/O I/O DESCRIPTION DESCRIPTIONNAME No. ..
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BQ2085DBTR-V1P3-BQ2085DBT-V1P3
SBS-Compliant Gas Gauge IC For Use With The bq29311 38-TSSOP -20 to 85
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FEATURES Provides Accurate Measurement of Available
Charge in Li-Ion and Li-Polymer Batteries Supports the Smart Battery Specification
(SBS) V1.1 Integrated Time Base Removes Need for
External Crystal 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 Based on a Powerful Low-Power RISC CPU
Core With High-Performance Peripherals Integrated Flash Memory Eliminates the Need
for External Configuration EEPROM 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 Uses 16-Bit Delta Sigma Converter for
Accurate Voltage and Temperature
Measurements Programmable Cell Modeling for Maximum
Battery Fuel Gauge Accuracy Drives 3-, 4-, or 5-Segment LED Display for
Remaining Capacity Indication 38-Pin TSSOP (DBT)
APPLICATIONS Notebook PCs Medical and Test Equipment Portable Instrumentation
DESCRIPTIONThe bq2085−V1P3 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−V1P3 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−V1P3, the host controller can manage
remaining battery power to extend the system run time as
much as possible.
BLOCK DIAGRAMSense
Resistor
(10 mΩ - 20 mΩ)
Pack−
Glueless
Interface
Cell Inputs
Safety Control
SMBus
Pack+
Li-Ion
Cells
Charge/Discharge
Power FETs
www.ti.comNot Recommended For New Designs
