SLUS530H – SEPTEMBER 2002 – REVISED JUNE 2007
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FUNCTIONAL DESCRIPTION (continued)
POR
SLEEP MODE
V
CC
> V
I(BAT)
checked at
all times
No
Indicate SLEEP
MODE
Yes
Regulate
I
O(PRECHG)
V
I(BAT)
< V
(LOWV)
Yes
Reset and Start
t
(PRECHG)
timer
Indicate
Charge-in-Progress
No
Reset all timers
start t
(CHG)
timers
Regulate Current
or Voltage
Indicate
Charge-in-Progress
No
Suspend charge
T
J
< t
(SHTDWN)
No
Yes
Indicate
Charge Suspend
t
(PRECHG)
expired?
No
V
I(BAT)
< V
(LOWV)
Yes
Yes
t
(CHG)
expired?
T
J
< t
(SHTDWN)
No
Yes
No
Yes
Fault Condition
Yes
V
I(BAT)
< V
(LOWV)
Indicate Fault
No
I
(TERM)
detection
?
No
t
(TAPER)
expired?
I
(TAPER)
detection
?
No
Yes
No
V
I(BAT)
> V
(RCH)
?
No
Enable
I
(FAULT)
current?
Yes
No
Yes
Turn off charge
Yes
V
I(BAT)
> V
(RCH)
?
Yes
Indicate DONE
Disable
I
(FAULT)
current?
No
V
I(BAT)
< V
(RCH)
?
Yes
Enter Battery
Absent
Detection
Figure 5. Operational Flow Chart
10
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