BQ24070 Datasheet, PDF (11/26 Pages) Texas Instruments – SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

www.ti.com
bq24070
SLUS694A – MARCH 2006 – REVISED MARCH 2006
FUNCTIONAL DESCRIPTIONS (continued)
POR
Y es
No
Y es
Vcc > V_I(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 3. Charge Control Operational Flow Chart
Submit Documentation Feedback
11