C0098C0113C0050C0054C0053C0048C0048

C0261
SLUS567A − JUNE, 2003 − REVISED OCTOBER 2003
C0083C0073C0078C0071C0076C0069C0262C0067C0069C0076C0076 C0076C0073C0262C0073C0079C0078 C0065C0078C0068 C0076C0073C0262C0080C0079C0076 C0066C0065C0084C0084C0069C0082C0089 C0071C0065C0083 C0071C0065C0085C0071C0069 C0073C0067
C0070C0079C0082 C0072C0065C0078C0068C0072C0069C0076C0068 C0065C0080C0080C0076C0073C0067C0065C0084C0073C0079C0078C0083 C0040C0098C0113C0074C0085C0078C0073C0079C0082C0116 C0070C0065C0077C0073C0076C0089C0041
1
www.ti.com
FEATURES
C0068 Reports Accurate State-of-Charge in Li-Ion
and Li-Pol Cells, No System Processor
Calculations Needed
C0068 Reports Cell Temperature and Voltage
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: < 2.5 µA
− Ship: < 1.7 µA
− Hibernate: < 1.5 µA
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 bq26500, the first in the bqJUNIORC0116 family
of advanced gas gauge device for handhald
applications, is a highly accurate standalone
single-cell Li-Ion and Li-Pol battery capacity
monitoring and reporting device 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 capacity
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
capacity, cell temperature and voltage,
state-of-charge, and status and control registers.
The bq26500 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 interface
reduces communication overhead in the external
microcontroller.
C0080C0082C0079C0068C0085C0067C0084C0073C0079C0078 C0068C0065C0084C0065 C0105C0110C0102C0111C0114C0109C0097C0116C0105C0111C0110 C0105C0115 C0099C0117C0114C0114C0101C0110C0116 C0097C0115 C0111C0102 C0112C0117C0098C0108C0105C0099C0097C0116C0105C0111C0110 C0100C0097C0116C0101C0046
C0080C0114C0111C0100C0117C0099C0116C0115 C0099C0111C0110C0102C0111C0114C0109 C0116C0111 C0115C0112C0101C0099C0105C0102C0105C0099C0097C0116C0105C0111C0110C0115 C0112C0101C0114 C0116C0104C0101 C0116C0101C0114C0109C0115 C0111C0102 C0084C0101C0120C0097C0115 C0073C0110C0115C0116C0114C0117C0109C0101C0110C0116C0115
C0115C0116C0097C0110C0100C0097C0114C0100 C0119C0097C0114C0114C0097C0110C0116C0121C0046 C0080C0114C0111C0100C0117C0099C0116C0105C0111C0110 C0112C0114C0111C0099C0101C0115C0115C0105C0110C0103 C0100C0111C0101C0115 C0110C0111C0116 C0110C0101C0099C0101C0115C0115C0097C0114C0105C0108C0121 C0105C0110C0099C0108C0117C0100C0101
C0116C0101C0115C0116C0105C0110C0103 C0111C0102 C0097C0108C0108 C0112C0097C0114C0097C0109C0101C0116C0101C0114C0115C0046
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
SIMPLIFIED APPLICATION
1
2
3
4
8
7
6
5
GPIO
SRP
SRN
BAT
RBI
VCC
VSS
HDQ
bq26500
Protection
Controller
+
HDQ
PACK−
PACK+
Battery Pack
Li-Ion
or
Li-Pol