ACT8937A
Rev 1, 22-Oct-12
Figure 7:
Typical Li+ charge profile and ACT8937A charge states
A: PRECONDITION State
B: FAST-CHARGE State
C: TOP-OFF State
D: END-OF-CHARGE State
Figure 8:
Charger State Diagram
TEMP NOT OK
ANY STATE
(VCHGIN < VBAT) OR (VCHGIN < VCHGIN UVLO)
OR (VCHGIN > VOVP) OR (SUSCHG[ ] = 1)
SUSPEND
TEMP-FAULT
(VCHGIN > VBAT) AND (VCHGIN > VCHGIN UVLO)
AND (VCHGIN < VOVP) AND (SUSCHG[ ] = 0)
TEMP OK
PRECONDITION
TIME-OUT-FAULT
PRECONDITION
Time-out
(VBAT > 2.85V) AND
(TQUAL = 32ms)
Total Time-out
FAST-CHARGE
(VBAT = VTERM ) AND
(TQUAL = 32ms)
(VBAT < VTERM - 205mV )
AND (TQUAL = 32ms)
TOP-OFF
(IBAT < 10% x ICHG) OR (Total
Time-out) AND (TQUAL = 32ms)
END-OF-CHARGE
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