100 k鈩?/div>
C2
0.1
碌F
Li-Ion
or
Li-Pol
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鈥揹ischarge, 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.
C3
0.1
碌F
3
HDQ
4
HDQ
BAT
5
VSS
SRN
6
R1
0.02鈩?/div>
Protection
Controller
PACK鈥?/div>
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.
Copyright
錚?/div>
2003, Texas Instruments Incorporated
www.ti.com
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