C0098C0113C0050C0055C0048C0048C0048
C0098C0113C0050C0055C0048C0049C0048
C0261
SLUS556 – FEBRUARY 2003
C0083C0073C0078C0071C0076C0069C0262C0067C0069C0076C0076 C0076C0073C0262C0073C0079C0078 C0065C0078C0068 C0076C0073C0262C0080C0079C0076 C0066C0065C0084C0084C0069C0082C0089 C0071C0065C0083 C0071C0065C0085C0071C0069 C0073C0067
C0070C0079C0082 C0080C0079C0082C0084C0065C0066C0076C0069 C0065C0080C0080C0076C0073C0067C0065C0084C0073C0079C0078C0083 C0040C0098C0113C0074C0085C0078C0073C0079C0082C0041
1
www.ti.com
FEATURES
C0068 Reports Accurate Time-to-Empty in Li-Ion
and Li-Pol Cells, No System Processor
Calculations Needed
C0068 Reports Cell Temperature, Voltage and
Average Current
C0068 High-Accuracy Coulometric Charge and
Discharge Current Integration with
Automatic Offset Cancellation
C0068 Requires No Offset Calibration
C0068 Programmable Input/Output Port
C0068 Internal Time-Base Eliminates External
Crystal Oscillator
C0068 Four Automatic Low-Power Operating Modes
– Active: < 100 µA
– Sleep: < 5 µA
– Ship: < 2 µA
– Hibernate: < 500 nA
C0068 Small 8-Pin TSSOP Package

APPLICATIONS
C0068 PDAs
C0068 Smart Phones
C0068 MP3 Players
C0068 Digital Cameras
C0068 Internet Appliances
C0068 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.
PRODUCT PREVIEW
C0080C0082C0079C0068C0085C0067C0084 C0080C0082C0069C0086C0073C0069C0087 C0105C0110C0102C0111C0114C0109C0097C0116C0105C0111C0110 C0099C0111C0110C0099C0101C0114C0110C0115 C0112C0114C0111C0100C0117C0099C0116C0115 C0105C0110 C0116C0104C0101 C0102C0111C0114C0109C0097C0116C0105C0118C0101 C0111C0114
C0100C0101C0115C0105C0103C0110 C0112C0104C0097C0115C0101 C0111C0102 C0100C0101C0118C0101C0108C0111C0112C0109C0101C0110C0116C0046 C0067C0104C0097C0114C0097C0099C0116C0101C0114C0105C0115C0116C0105C0099 C0100C0097C0116C0097 C0097C0110C0100 C0111C0116C0104C0101C0114
C0115C0112C0101C0099C0105C0102C0105C0099C0097C0116C0105C0111C0110C0115 C0097C0114C0101 C0100C0101C0115C0105C0103C0110 C0103C0111C0097C0108C0115C0046 C0084C0101C0120C0097C0115 C0073C0110C0115C0116C0114C0117C0109C0101C0110C0116C0115 C0114C0101C0115C0101C0114C0118C0101C0115 C0116C0104C0101 C0114C0105C0103C0104C0116 C0116C0111
C0099C0104C0097C0110C0103C0101 C0111C0114 C0100C0105C0115C0099C0111C0110C0116C0105C0110C0117C0101 C0116C0104C0101C0115C0101 C0112C0114C0111C0100C0117C0099C0116C0115 C0119C0105C0116C0104C0111C0117C0116 C0110C0111C0116C0105C0099C0101C0046
Copyright  2003, Texas Instruments Incorporated
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.
UDG–03038
TYPICAL APPLICATION
1
2
3
4
8
7
6
5
GPIO
SRP
SRN
BAT
RBI
VCC
VSS
HDQ
bqJUNIOR
Protection
Controller
+
HDQ
PACK–
PACK+
Battery Pack
C4
0.1 µF
C3
0.1 µF
C2
0.1 µF
R2
100 kΩ
R3
100 kΩ
C1
0.1 µF
R1
0.02Ω
Li-Ion
or
Li-Pol