BQ2084-V140_14 Datasheet, PDF (5/64 Pages) Texas Instruments – SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312

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SMBus TIMING DIAGRAMS
bq2084-V140
SLUS664B – JULY 2005 – REVISED AUGUST 2006
SYSTEM DIAGRAM
Pack +
Pres
SMBus
Fuse
bq2084
Pre-Charge Control
Fail-Safe
Protection
PF Input
Power Management
LDO, TOUT and Power Mode Control
3.3 V
Temperature Measurement
<1% Error
T_INT
T1
1 k Bytes of
User Flash
32 kHz Clock
Generator
Cell Balancing Algorithm and Control
SBS v1.1 Data
System Interface
bq29312 RAM/Comms Validation
1 ^st Level OC
Protection
1 ^st Level OV and
UV Protection
Pack Under
Voltage Power
Mode Control
Cell and Pack
Voltage
Measurement
Capacity Prediction <1% Error
32 kHz
I²C
Discharge / Charge /
Pre-Charge FETs
bq29312
PCH FET Drive
Pre-Charge
FET Drive
Cell Balancing
Drive
LDO, Therm Output Drive and UVLO
System
Watchdog
Delay Counters
System Interface
RAM Registers
Power Mode Control
2-Tier Overcurrent Protection
Voltage Level Translator
Pack −
Sense Resistor
(5 to 30 mW)
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