( File format: PDF, 727 KB )
Li-Ion and Li-Pol Battery Gas Gauge IC for Portable Apps (bqJUNIOR) (Rev. B)
Texas Instruments
Description
The bqJUNIOR™ series are highly accurate stand-alone single-cell Li-Ion and Li-Pol battery capacity monitoring and reporting devices targeted at space-limited, portable applications. The IC 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 age, temperature, self-discharge, and discharge rate are applied to the capacity measurments to provide available time-to-empty information 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 current, capacity, time-to-empty, state-of-charge, cell temperature and voltage, status, and more.The bqJUNIOR can operate directly from single-cell Li-Ion and Li-Pol batteries and communicates to the system over a HDQ one-wire or I2C serial interface.
Features
HDQ (bq27010) or I2C (bq27210) CommunicationReports Accurate Time-to-Empty At Both Measured and Host-Requested Load ValuesReports Available Capacity Compensated for Discharge Rate, Temperature, and AgeEnd-of-Discharge Voltage Compensated for Discharge Rate and TemperatureAutomatic Capacity Reduction with AgeReports Temperature, Voltage, and CurrentHigh Accuracy Charge and Discharge Current Integration with Automatic Offset Calibration Requires No User CalibrationProgrammable Input/Output PortInternal User EEPROM Configuration MemoryUploadable Coefficients Allows Host-Side Use with Multiple Pack CharacteristicsStable Oscillator Without External ComponentsDynamic End-of-Discharge Detection Delay to Allow Use in a High-Dynamic Load EnvironmentAutomatic Sleep Mode When Communication Lines are LowAvailable in a Small 3 mm x 4 mm QFN PackageFive Low-Power Operating ModesActive: < 90 µA Sleep: < 2.5 µAShip: < 2 µA (bq27010 only)Hibernate: < 1.5 µAData Retention: < 20 nAAPPLICATIONSPDASmart PhonesMP3 PlayersDigital CamerasInternet AppliancesHandheld Devices bqJUNIOR is a trademark of Texas Instruments.
Related Datasheets
| Part Number | Description | Category |
| • BQ27200 | Single-Cell Li-Ion and Li-Pol Battery Gas Gauge IC For Portable Applications (Rev. D) | ICs, Interface |
| • BQ27350 | Single Cell Li-Ion Battery Manager with Impedance Track Fuel Gauge Technology | ICs, Interface |
| • BQ27500 | System-Side Impedance-Track Fuel Gauge (Rev. C) | ICs, Interface |
As the hyperlinked contents/websites are those of third parties, we cannot vouch for their accuracy or legitimacy.
Hot Articles
Most Popular Articles
Search EE Times India
Max's Cool Beans
Strange modes of transport and other "stuff"
Someone just pointed me at a YouTube video that claims to show the world's first e-powered multicopter flight...
