Datasheet

Start
BATT_DETECT
Start 25mstimer
TimerExpired?
IsVOUT<VREG-100mV?
BatteryPresent
TurnoffSinkCurrent
Returntoflow
SetOUT REG
toVREG-400mV
Enablesinkcurrent
Reset & Start 25mstimer
No
Yes
TimerExpired?
No
Yes
IsVOUT>VREG-300mV?
BatteryPresent
TurnoffSinkCurrent
Returntoflow
Yes
No
Yes
No
Battery Absent
Don’tSignalCharge
TurnoffSinkCurrent
ReturntoFlow
bq24090, bq24091
bq24092, bq24093
www.ti.com SLUS968A –JANUARY 2010–REVISED FEBRUARY 2010
Figure 24. Battery Detect Routine
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Product Folder Link(s): bq24090 bq24091