BQ26500 Series
Complete battery fuel gauge for One and Two cell Li-ion applications
Manufacturer: Texas Instruments
Catalog
Complete battery fuel gauge for One and Two cell Li-ion applications
Key Features
• Reports Accurate State-of-Charge in Li-Ion and Li-Pol Cells, No System Processor Calculations NeededReports Cell Temperature and VoltageHigh-Accuracy Coulometric Charge and Discharge Current Integration with Automatic Offset CancellationRequires No Offset CalibrationProgrammable Input/Output PortInternal Time-Base Eliminates External Crystal OscillatorFour Automatic Low-Power Operating ModesActive: < 100 µASleep: < 2.5 µAShip: < 1.7 µAHibernate: < 1.5 µASmall 8-Pin TSSOP PackageAPPLICATIONSPDAsSmart PhonesMP3 PlayersDigital CamerasInternet AppliancesHandheld DevicesReports Accurate State-of-Charge in Li-Ion and Li-Pol Cells, No System Processor Calculations NeededReports Cell Temperature and VoltageHigh-Accuracy Coulometric Charge and Discharge Current Integration with Automatic Offset CancellationRequires No Offset CalibrationProgrammable Input/Output PortInternal Time-Base Eliminates External Crystal OscillatorFour Automatic Low-Power Operating ModesActive: < 100 µASleep: < 2.5 µAShip: < 1.7 µAHibernate: < 1.5 µASmall 8-Pin TSSOP PackageAPPLICATIONSPDAsSmart PhonesMP3 PlayersDigital CamerasInternet AppliancesHandheld Devices
Description
AI
The bq26500, the first in the bqJUNIOR™ family of advanced gas gauge device for handheld applications, is a highly accurate standalone single-cell Li-Ion and Li-Pol battery capacity monitoring and reporting device targeted at space limited portable applications. The device monitors a voltage drop across a small current sense resistor connected in series with the battery to determine charge and discharge activity of the battery. Compensations for battery temperature, self-discharge, and rate of discharge are applied to the charge counter to provide available capacity across a wide range of operating conditions. Battery capacity is automatically recalibrated, or learned, in the course of a discharge cycle from full to empty. Internal registers include available capacity, cell temperature and voltage, state-of-charge, and status and control registers.
The bq26500 can operate directly from single-cell Li-Ion and Li-Pol batteries and communicates to the system over a simple one-wire bi-directional serial interface. The 5-kbits/s HDQ bus interface reduces communication overhead in the external microcontroller.
The bq26500, the first in the bqJUNIOR™ family of advanced gas gauge device for handheld applications, is a highly accurate standalone single-cell Li-Ion and Li-Pol battery capacity monitoring and reporting device targeted at space limited portable applications. The device monitors a voltage drop across a small current sense resistor connected in series with the battery to determine charge and discharge activity of the battery. Compensations for battery temperature, self-discharge, and rate of discharge are applied to the charge counter to provide available capacity across a wide range of operating conditions. Battery capacity is automatically recalibrated, or learned, in the course of a discharge cycle from full to empty. Internal registers include available capacity, cell temperature and voltage, state-of-charge, and status and control registers.
The bq26500 can operate directly from single-cell Li-Ion and Li-Pol batteries and communicates to the system over a simple one-wire bi-directional serial interface. The 5-kbits/s HDQ bus interface reduces communication overhead in the external microcontroller.
