BQ20Z40-R1 Datasheet, PDF (2/16 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™ TECHNOLOGY FOR USE WITH THE bq29330

bq20z40-R1
SLUS993 – DECEMBER 2009
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
SYSTEM PARTITIONING DIAGRAM
Pack +
SMBus
Charging
Algorithm
SBS v1.1
Data
Fail Safe
Protection
Pack -
SHA-1
Authentication
Cell Balancing
Algorithm &
Control
bq20z40–R1
Overvoltage &
Undervoltage
Protection
Overrcurrent
Protection
Fuse
Temperature
Measurement
& Protection
32kHz Clock
Generator
bq29330
Validation &
Control
System
Interface
Cell & Pack
Voltage
Measurement
Impedance
Track™ Gas
Gauging
Therm
Supply Voltage
Reset
32KHz
Alert
I²C
LDO
& Therm. Drive
& Reset
Watchdog &
Protection
Timing
Registers
System
Interface
Voltage Level
Translator
Overcurrent &
Short Circuit
Protection
bq29330
N-CH FET
Drive
Charge Pumps
RSNS
5mΩ – 20mΩ typ.
Figure 1.
bq294xy
2
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