BQ28550-R1 Datasheet, PDF (23/42 Pages) Texas Instruments – Single Cell Li-Ion Battery Gas Gauge

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Not Recommended for New Designs
bq28550-R1
SLUSAS4A – OCTOBER 2012 – REVISED SEPTEMBER 2014
Charger attached
Shutdown
CHG: OFF
DSG: OFF
VREG: OFF
No Charger
VBAT > 2.3 V
for a period
of t > 4.0 ms
Over-Discharge
Voltage
CHG: ON
DSG: OFF
VREG OFF
VBAT < 2.3 V
for a period
of t > 24 ms
Normal
CHG: ON
DSG: ON
VREG: ON
FG turn
off DSG
FG turn
on DSG
VBAT< 2.3 V
for a period
of t > 24 ms
FG shutdown
DSG "OFF”
CHG: ON
DSG: OFF
VREG: ON
Figure 4. Shutdown Operation
7.6.5.6 Operational Modes
The sequence of the operational modes is as follows: NORMAL to SLEEP to FULLSLEEP; FULLSLEEP to either
HIBERNATE or SHUTDOWN; or SLEEP to SHUTDOWN.
Mode
NORMAL
Table 6. Operational Modes
Enter Mode
If ALL conditions such as Average
Current, Cell Voltage, and
Temperature are satisfied.
Exit Mode
Go into other modes like SLEEP,
FULLSLEEP, HIBERNATE, or
SHUTDOWN mode if conditions are
satisfied.
Comment
In this mode, power consumption is
the highest. Measurements are taken
and updated every 1 s.
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