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

DESCRIPTION

The 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.