Transcript Slide 1

BQ27500 Complete System Side Battery Fuel Gauge with
Impedance Track™ technology for single cell Li-Ion Applications
• Patented Impedance Track™ next generation
gauging algorithm
• Accurate & complete battery fuel gauge
• CPU-based IC reports remaining battery capacity,
time-to empty, voltage, current and temperature
• Calculates remaining charge under all conditions
of discharge rate, temperature, and cell age
• System side implementation even with removable
battery.
• Provides the system ALL data needed to
effectively manage the battery & extend run-time
• No calculations with the host micro-controller for
easy implementation of accurate fuel gauge
• Accurate display of run time under all conditions
• Provides near empty warning for auto-saving of
data
• Impedance Track™ requires no learning or
conditioning cycle
• System side implementation – no extra circuitry
needed inside of battery pack
Host System
Accurate cost-efficient battery fuelgauge that is easy to implement
REG
uC
I2C
SCL SDA LOWBAT
VCC
Single Cell Li-Ion
Battery Pack
GPIO
BATID
BAT
PACK+
PROTECT
IC
BQ27500
CHG
PACK-
FETs
DSG
SRP
SRN
VSS
SDQM
SDQ
• PDAs, Cellular Handset, Ultra Mobile
PC’s, Portable Gaming, Multimedia
Players, Digital Cameras
TS
BQ26100
(OPTIONAL)
T
Single-Cell Fuel Gauge Portfolio
Protector
Fuel Gauge
Security
Product Key
bq27500
bq27000
bq2019
• Battery monitor
• Fixed EDV
• HDQ Interface
bq27200
• Fixed EDV
• I2C Interface
bq2022
• 64 bit ID
bq27010
• Compensated EDV
• HDQ Interface
•
•
•
•
bq27540
bq27210
• Compensated EDV
• I2C Interface
•
•
•
•
bq26100
• SHA-1 Security
1Q2007
Impedance Track III
Host side design
SHA-1 Security integrated
12 pin, 2.5x4 mm QFN
Impedance Track III
Battery Pack side design
SHA-1 Security integrated
12 pin, 2.5x4 mm QFN
bq27350
•
•
•
•
Impedance Track III
Battery Pack side design
SHA-1 Security integrated
20 pin package
BQ27500
Family Overview
Part
Number
Competitor
Integrated
CPU
Calculates
remaining
Battery
Capacity
Run time
prediction
Impedance
Track
Authentication
Power
Modes
Key
Difference
BQ27500
TI
YES
YES
YES
YES
YES
4
BQ26500
TI
YES
YES
YES
NO
NO
4
BQ27000
BQ27200
TI
YES
YES
YES
NO
NO
4
BQ27010
BQ27210
TI
YES
YES
YES
NO
NO
4
The integrated
CPU allows the
bq26500x/bq27000
to develop a
comprehensive
data set by
performing all the
calculations itself.
The host system
processor simple
reads the
bq2650x/bq27000
for information.