ACT8946AQJ203-T
Rev 1.0, 08-Jul-16
VTERM
RECHARGE
ICHG
A: PRECONDITION
State
B: FAST-CHARGE
Current
Voltage
State
C: TOP-OFF State
VPRECHARGE
D: END-OF-CHARGE
State
END-OF-CHARGE Current
PRECONDITION Charge Current
STATE
A
B
C
D
B
Figure 4: Typical Li+ charge profile and ACT8946A charge states
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
Figure 5: Charger State Diagram
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