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DESCRIPTION
The bqJUNIOR series are highly accurate
stand-alone single-cell Li-Ion and Li-Pol battery ca-
pacity 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. Compen-
sations for battery temperature, self-discharge, and
discharge rate are applied to the capacity
measurments to provide available time-to-empty in-
formation across a wide range of operating con-
ditions. 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 I
2
C serial interface.
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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.
bqJUNIOR is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2004, Texas Instruments Incorporated
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