BQ29312A Datasheet, PDF (8/35 Pages) Texas Instruments – TWO-CELL, THREE-CELL, AND FOUR-CELL LITHIUM-ION OR LITHIUM-POLYMER BATTERY PROTECTION AFE

bq29312A
SLUS629A – JANUARY 2005 – REVISED AUGUST 2005
FUNCTIONAL BLOCK DIAGRAM
PACK-
PACK+
GG VDD
R_(ZVCHG)
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C _(REG)
PMS ZVCHG
CHG
DSG
BAT PACK
REG
0.2-A
Current Source
SLEEP
CONTROL
32-kHz INPUT
FROM GG
REG
+
__-
200 k
SLEEP
WDI
GG INTERFACE
SDATA
GG INTERFACE
SCLK
200 k
ALERT TO GG
OPEN-DRAIN
OUTPUT
SDATA
SCLK
REG
XALERT
OD
ZVCHG_ON
Gate Driver CHG_ON
DSG_ON
FET
Logic
Registers
Status
Output Ctl
State Ctl
Function Ctl
CELL_SEL
OCDV
OCDT
SCC
SCD
Open-
Drain
Output
Watchdog
Timer
Power
Mode
SHIP_ON ^Circuit
SLEEP_ON
DELAY
OVERCURRENT
SHORT-CIRCUIT
3.3V LDO
POR
Cell
Selection
Switches
VC1
VC2
VC3
VC4
VC5
Drive
Control
TOUT
R _THERM
C _THERM
CELL 4
CELL 3
CELL 2
CELL 1
GG TS
INPUT
THERMISTOR
Cell Voltage
Translation
Overload
Comparator
R_CELL
VCELL _CCELL
GG ANALOG
INPUT
Short-Circuit
Comparator
SR1
SR2
GND
R _SNS
8