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| BQ20Z80-V102_07 Datasheet, PDF (2/28 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK TM TECHNOLOGY FOR USE WITH THE BQ29312A | |||
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bq20z80-V102
SLUS681B â NOVEMBER 2005 â REVISED JANUARY 2007
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
SYSTEM DIAGRAM
Fuse
Pack +
bq20z80
Precharge Control
Fail-Safe Protection
PF Input
Power Management
LDO, TOUT, and Power Mode control
Supply V oltage
Temperature Measurement TINT
<1% Error
768 Bytes of
User Flash
32-kHz Clock
Generator
T1
32 kHz
SMBus
Cell Balancing Algorithm and Control
SBS v1.1 Data
System Interface
I2C
bq29312 RAM/Comms Validation
1st Level OC
Protection
1stLevel OV and
UV Protection
XAlert
Sleep
Pack Undervoltage
Power Mode
Control
Cell and Pack
Voltage
Measurement
Impedance Track (TM) + Lifetime Data Logging
Discharge / Charge /
Precharge FETs
bq29312A
PCH FET Drive
Precharge
FET Drive
Cell Balancing
Drive
LDO, Therm Output Drive & UVLO
System Watchdog Delay Counters
System Interface RAM Registers
Power Mode Control
2-Tier Overcurrent Protection
Voltage Level Translator
bq294xx
Pack -
Sense Resistor
(5 m - 20 mW typ)
TSSOP (DBT)
(TOP VIEW)
VIN 1
TS1 2
TS2 3
PU 4
PRES 5
SCLK 6
SAFE 7
VDDD 8
RBI 9
SDATA 10
VSSD 11
SAFE 12
NC 13
NC 14
SMBC 15
SMBD 16
DISP 17
PFIN 18
VSSD 19
38 VSSD
37 NC
36 NC
35 CLKOUT
34 XCK1 / VSSA
33 XCK2 / ROSC
32 FILT
31 VDDA
30 VSSA
29 VSSA
28 SR1
27 SR2
26 MRST
25 XALERT
24 LED1
23 LED2
22 LED3
21 LED4
20 LED5
NC - No internal connection
2
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