Datasheet

VCC > SRN
No
IndicateSLEEP
SLEEP MODE
Yes
EnableVREFLDO &
ChipBias
Turnon
BATDRVFET
30msdelay
TurnoffBATFET
Turnon ACFET
Battery
present?
Yes
Initiatebattery
detectalgorithm
Indicatebattery
absent
No
Conditionsmet
forcharge?
No
IndicateNOT
CHARGING,
Suspendtimers
Yes
VFB < VLOWV Yes
Start 30 minute
prechargetimer
IndicateCharge-
In-Progress
Regulate
prechargecurrent
VFB < VLOWV
Precharge
timerexpired?
Yes
No
Yes
IndicateFAULT
FAULT
EnableI
FAULT
VFB > VRECH
StartFastcharge
timer
IndicateCharge-
In-Progress
Regulate
fastchargecurrent
Fastcharge
TimerExpired?
No Yes
VFB > VRECH
&
ICHG < ITERM
Yes
No
IndicateChargeIn
Progress
Turnoffcharge,
EnableI
DISCHG
for 1
second
VFB < VRECH
No
IndicateDONE
ChargeComplete
Yes
IndicateBATTERY
ABSENT
BatteryRemoved
Yes
POR
See EnablingandDisabling
ChargeSection
Conditionsmet
forcharge?
No
Yes
No
Conditionsmet
forcharge?
No
Yes
IndicateNOT
CHARGING,
Suspendtimers
No
No
bq24616
www.ti.com SLUSA49B –APRIL 2010– REVISED OCTOBER 2011
OPERATIONAL FLOWCHART
Figure 14. Operational Flowchart
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