bq24070
bq24071
www.ti.com
SLUS694B–MARCH 2006–REVISED AUGUST 2006
FUNCTIONAL DESCRIPTIONS (continued)
POR
SLEEP MODE
Vcc > V
I(BAT)
checked at all
times?
Indicate SLEEP
MODE
No
Yes
Regulate
I
O(PRECHG)
Reset and Start
timer
V
< V
(LOWV)
I(BAT)
t
Yes
Indicate Charge−
In−Progress
(PRECHG)
?
No
Reset all timers,
Start t timer
(CHG)
Regulate Current
or Voltage
Indicate Charge−
In−Progress
No
V
<V
(LOWV)
I(BAT)
Yes
Yes
No
t
(PRECHG)
Expired?
t
(CHG)
Expired?
Yes
No
Yes
Fault Condition
Indicate Fault
Yes
V
<V
(LOWV)
I(BAT)
?
No
V
> V
(RCH)
I(BAT)
?
I
(TERM)
No
detection?
No
Enable I
(F AUL T)
current
Yes
No
Yes
V
> V
?
I(BAT)
(RCH)
T urn off charge
Indicate DONE
Yes
Yes
Disable I
(F AUL T)
current
No
V
< V
?
I(BAT)
(RCH)
Figure 3. Charge Control Operational Flow Chart
11
Submit Documentation Feedback
TI [ TEXAS INSTRUMENTS ]
