BQ24070_14 Datasheet, PDF (16/33 Pages) Texas Instruments – System Power-Path Management IC

bq24070, bq24071
SLUS694G – MARCH 2006 – REVISED DECEMBER 2014
8.4.3.2 Charge Control
POR
Y es
No
Y es
Vcc > VI(BAT)
checked at all
No
times?
Y es
SLEEP MODE
Indicate SLEEP
MODE
V _I(BAT) < V(LOWV) _Yes
?
Reset and Start
t(PRECHG) timer
No
Reset all timers,
Start t _(CHG) timer
Regulate Current
or V oltage
Indicate Charge−
In−Progress
No
Y es
t _(CHG)
Expired?
No
Y es
V _I(BAT) <V(LOWV)
?
No
I _(TERM)
detection?
Y es
Y es
T urn off charge
Indicate DONE
No
Regulate
I _O(PRECHG)
Indicate Charge−
In−Progress
V _I(BAT) <V(LOWV)
Y es
t(PRECHG)
No
Expired?
Y es
Fault Condition
Indicate Fault
V _I(BAT) > V(RCH)
?
No
Enable I(F _{AUL T)}
current
No
V _I(BAT) > V(RCH)
?
Y es
Disable I _{(F AUL T)}
current
V _I(BAT) < V(RCH)
?
Figure 6. Charge Control Operational Flow Chart
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