BQ20Z70_17 Datasheet, PDF (2/17 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK TECHNOLOGY FOR USE WITH THE bq29330

bq20z70
Not Recommended For New Designs
SLUS686B – NOVEMBER 2005 – REVISED JULY 2007
SYSTEM PARTITIONING DIAGRAM
www.ti.com
Pack +
SMBus
Charging
Algorithm
SBS v1.1
Data
Pack -
SHA-1
Authentication
Cell Balancing
Algorithm &
Control
bq20z70
Fail Safe
Protection
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.
XALERT
TS2
TS1
CLKOUT
PRES
PFIN
SAFE
SMBD
NC
SMBC
TSSOP (PW)
(TOP VIEW)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCELL -
VCELL +
VCC
VSS
MRST
SRN
SRP
VSS
SCLK
SDATA
bq294xy
2
Submit Documentation Feedback