Datasheet

Exit From SLEEP
| AverageCurrent( ) | > Sleep Current
OR
Current is Detected above I
WAKE
Exit From SLEEP
(Host has set Control Status
[HIBERNATE] = 1
OR
V
CELL
< Hibernate Voltage
Fuel gauginganddata
updated every 1s
NORMAL
Fuel gauging and data
updated every 20 seconds
SLEEP
Disable all bq27510
subcircuits except GPIO.
Negate /BAT_GD
HIBERNATE
Entry to SLEEP
Operation Configuration[SLEEP] = 1
AND
| AverageCurrent( ) |≤ Sleep Current
Wakeup From HIBERNATE
Communication Activity
AND
Comm address is NOT for bq27510
Exit From HIBERNATE
Battery Removed
POR
Check for battery insertion
from HALT state.
No gauging
BAT INSERT CHECK
Entry to NORMAL
Flags [BAT_DET] = 1
Exit From NORMAL
Flags [BAT_DET] = 0
Exit From SLEEP
Flags [BAT_DET] = 0
Flags [BAT_DET] = 0
WAIT_HIBERNATE
Fuel gauging and data
updated every20seconds
/BAT_GD unchanged
Exit From WAIT_HIBERNATE
Cell relaxed
AND
| AverageCurrent() | < Hibernate
OR
Cell relaxed
AND
V
CELL
< Hibernate Voltage
System Shutdown
Exit From WAIT_HIBERNATE
Host must set Control Status
[HIBERNATE] = 0
AND
V
CELL
> Hibernate Voltage
Exit From HIBERNATE
Communication Activity
AND Comm address is for bq27510
bq27500/1 clears Control Status
[HIBERNATE] = 0
Recommend Host also set Control
Status [HIBERNATE] = 0
NORMALMode
SLEEPMode
bq27510-G1
SLUS927–APRIL2009..................................................................................................................................................................................................... www.ti.com
Figure2.PowerModeDiagram
ThefuelgaugeisinNORMALModewhennotinanyotherpowermode.Duringthismode,AverageCurrent(),
Voltage()andTemperature()measurementsaretaken,andtheinterfacedatasetisupdated.Decisionsto
changestatesarealsomade.Thismodeisexitedbyactivatingadifferentpowermode.
BecausethegaugeconsumesthemostpowerinNORMALmode,theImpedanceTrack™algorithmminimizes
thetimethefuelgaugeremainsinthismode.
SLEEPmodeisenteredautomaticallyifthefeatureisenabled(OperationConfiguration[SLEEP])=1)and
AverageCurrent()isbelowtheprogrammablelevelSleepCurrent.OnceentryintoSLEEPmodehasbeen
qualified,butpriortoenteringit,thebq27510performsanADCautocalibrationtominimizeoffset.
DuringSLEEPmode,thebq27510periodicallytakesdatameasurementsandupdatesitsdataset.However,a
majorityofitstimeisspentinanidlecondition.
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ProductFolderLink(s):bq27510-G1
Not Recommended For New Designs