bq2063
SBS v1.1-COMPLIANT Li-ION GAS-GAUGE IC
WITH PROTECTOR INTERFACE
SLUS468E– MAY 2001 – REVISED APRIL 2002
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C0068 Provides Accurate Measurement of
Available Charge in Li-Ion Batteries
C0068 Supports the 2-Wire SMBus V1.1 Interface
With PEC or Single-Wire HDQ16
C0068 Directly Interfaces the Seiko S-8243
Protection IC for Maximum Safety
Protection and Minimal Component Count
C0068 Supports Internal or External Thermistor
C0068 Reports Individual Cell Voltages
C0068 Uses 15-Bit ADC for Accurate Voltage,
Temperature, and Current Measurements
C0068 Measures Charge Flow Using A V-to-F
Converter With Offset of Less Than 16 µV
After Calibration
C0068 Consumes Less Than 0.5 mW Operating
C0068 Drives 4- or 5-Segment LED Display for
Remaining Capacity Indication
C0068 28-Pin 150-Mil SSOP

description
The bq2063 SBS-compliant gas gauge IC for battery-pack or in-system installation maintains an accurate
record of available charge in Li-Ion batteries. The bq2063 monitors capacity and other critical parameters in
Li-Ion battery packs. It also directly interfaces the Seiko S-8243 protection IC to minimize component count in
smart-battery circuits.
The bq2063 uses a V-to-F converter with automatic offset correction for charge and discharge counting. For
voltage, temperature, and current reporting, the bq2063 uses an A-to-D converter. In conjunction with the
S-8243, the onboard ADC also monitors individual cell voltages in a Li-Ion battery pack and allows the bq2063
to generate control signals to enhance pack safety.
The bq2063 supports the smart battery data (SBData) commands and charge-control functions. It
communicates data using the system management bus (SMBus) 2-wire protocol or the 1-wire HDQ16 protocol.
The data available include the battery’s remaining capacity, temperature, voltage, current, and remaining
run-time predictions. The bq2063 provides LED drivers and a push-button input to depict remaining battery
capacity from full to empty in 20% or 25% increments with a 4- or 5-segment display.
The bq2063 works with an external EEPROM. The EEPROM stores the configuration information for the
bq2063, such as the battery’s chemistry, self-discharge rate, rate-compensation factors, measurement
calibration, and design voltage and capacity. The bq2063 uses the programmable self-discharge rate and other
compensation factors stored in the EEPROM to accurately adjust remaining capacity for use and standby
conditions based on time, rate, and temperature. The bq2063 also automatically calibrates or learns the true
battery capacity in the course of a discharge cycle from programmable near full to near empty levels.
The S-8243 protection IC may be used to provide power to the bq2063 from a 3- or 4-series Li-Ion cell stack.
AVAILABLE OPTIONS
PACKAGE
T
J
28-LEAD SSOP
(DBQ)
–20°C to 70°C bq2063DBQ
Copyright  2002, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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.
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28
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HDQ16
ESCL
ESDA
RBI
REG
VOUT
VCC
VSS
CTL2
CTL3
CTL4
LED1
LED2
LED3
SMBC
SMBD
SAFETY
GND
GND
VCELL
SR1
SR2
SRC
TS
THON
DISP
LED5
LED4
SSOP (DBQ) PACKAGE
(TOP VIEW)