BQ27010 Datasheet, PDF (1/7 Pages) Texas Instruments – SINGLE-CELL LHON AND LI-POL BATTERY GAS GAUGE IC FOR PORTABLE APPLICATIONS

bq27000
bq27010
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SLUS556 – FEBRUARY 2003
SINGLEĆCELL LIĆION AND LIĆPOL BATTERY GAS GAUGE IC
FOR PORTABLE APPLICATIONS (bqJUNIOR)
FEATURES
D Reports Accurate Time-to-Empty in Li-Ion
and Li-Pol Cells, No System Processor
Calculations Needed
D Reports Cell Temperature, Voltage and
Average Current
D High-Accuracy Coulometric Charge and
Discharge Current Integration with
Automatic Offset Cancellation
D Requires No Offset Calibration
D Programmable Input/Output Port
D Internal Time-Base Eliminates External
Crystal Oscillator
D Four Automatic Low-Power Operating Modes
– Active: < 100 µA
– Sleep: < 5 µA
– Ship: < 2 µA
– Hibernate: < 500 nA
D Small 8-Pin TSSOP Package
TYPICAL APPLICATION
PACK+
HDQ
PACK–
C4
0.1 µF
bqJUNIOR
1 RBI GPIO 8
C3
0.1 µF
2 VCC
3 VSS
SRP 7
SRN 6
4 HDQ BAT 5
Protection
Controller
UDG–03038
Li-Ion
or
+ ^Li-Pol
R2
100 kΩ
C1
R1
0.1 µF _0.02Ω
R3
100 kΩ
C2
0.1 µF
APPLICATIONS
D PDAs
D Smart Phones
D MP3 Players
D Digital Cameras
D Internet Appliances
D Handheld Devices
DESCRIPTION
The bqJUNIOR series are highly accurate
standalone single-cell Li-Ion and Li-Pol battery
capacity monitoring and reporting devices
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 time-to-empty and time-to-full
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 available time-to-empty, cell
temperature and voltage, average current, and
other status and control registers.
The bqJUNIOR 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 interfaces reduces
communications overhead in the external
microcontroller.
Battery Pack
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
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Copyright  2003, Texas Instruments Incorporated
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