ACT8810
Active- Semi
Rev 4, 01-Oct-09
ActivePathTM CHARGER
Figure 14:
Typical Li+ charge profile and ACT8810 charge states
VSET
RECHARGE
ISET
Current
Voltage
VPRECHARGE
12% ISET
STATE
A
B
C
D
E
B
A: PRECONDITION State
B: FAST-CHARGE State
C: TOP-OFF State
D: SLEEP State
E: DISCHARGE State
Figure 15:
Charger State Diagram
ANY STATE
BATTERY REMOVED OR
V
V
CHG_IN < VBAT + 120mV OR
CHG_IN < UVLO
SUSPEND
BATTERY REPLACED AND
VCHG_IN > VBAT + 120mV AND
VCHG_IN > UVLO
T > TPRECONDITION AND
VBAT < 2.85V
TIMEOUT-FAULT
PRECONDITION
VBAT > 2.85V
T > TNORMAL AND
BAT < VTERM
V
FAST-CHARGE
VBAT = VTERM
TOP-OFF
IBAT < ITERM
IBAT > ITERM
DELAY
SLEEP
VBAT < VTERM – 175mV
Innovative PowerTM
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Copyright © 2009 Active-Semi, Inc.
ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of Philips Electronics.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
