bq24030, bq24031, bq24032,
bq24032A, bq24035, bq24038, bq24039
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SLUS618C–AUGUST 2004–REVISED JUNE 2005
FUNCTIONAL DESCRIPTIONS (continued)
POR
SLEEP MODE
Vcc > V
I(OUT)
checked at all
times?
Indicate SLEEP
MODE
No
Yes
Regulate
I
O(PRECHG)
Reset and Start
V
< V
I(OUT) (LOWV)
t
Yes
timer
Indicate Charge−
In−Progress
(PRECHG)
?
No
Reset all timers,
Start t
timer
(CHG)
Regulate Current
or Voltage
Indicate Charge−
In−Progress
No
V
<V
I(OUT)
(LOWV)
Yes
Yes
No
t
(PRECHG)
Expired?
t
(CHG)
Expired?
Yes
No
Yes
Fault Condition
Indicate Fault
Yes
V
<V
(LOWV)
I(OUT)
?
No
V
> V
(RCH)
I(OUT)
?
I
(TERM)
No
detection?
No
Enable I
(FAULT)
current
Yes
No
Yes
V
> V
I(OUT)
(RCH)
?
Turn off charge
Indicate DONE
Yes
Yes
Disable I
(FAULT)
current
No
V
< V
?
I(OUT)
(RCH)
Figure 3. Charge Control Operational Flow Chart
12
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