AAT3681 Datasheet, PDF (10/15 Pages) Advanced Analogic Technologies – USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger

System Operation Flow Chart
AAT3681
USB Port or AC Adapter
Lithium-Ion/Polymer Battery Charger
Enable
Power On Reset
No
Yes
Power Input
Voltage
V_IN > V_UVLO
Yes
Shut Down
Fault Conditions
Yes
Monitoring
OV, OT
No (AAT3681)
No (AAT3681-1)
Preconditioning
Test
V_MIN > V_BAT
Yes
Preconditioning
(Trickle Charge)
No
Recharge Test
V_RCH > V_BAT
No
Constant
Yes
Current Phase Test
Yes
Current Charge
V_IN > V_BAT
Mode
No
Voltage Phase Test
Yes
I_BAT > I_TERM
Constant
Voltage Charge
Mode
No
Charge Completed
Charge
Control
10
3681.2007.01.1.2