AAT2556
Battery Charger and Step-Down
Converter for Portable Applications
Battery Charging System Operation Flow Chart
Enable
Yes
Power On Reset
No
Power Input
Voltage
VADP > VUVLO
Yes
Fault Conditions
Monitoring
OV, OT
Charge
Control
Shut Down
Yes
No
Preconditioning
Test
VMIN > VBAT
Preconditioning
(Trickle Charge)
Yes
No
No
Constant
Current Charge
Mode
Recharge Test
VRCH > VBAT
Current Phase Test
Yes
Yes
V
ADP > VBAT
No
Constant
Voltage Charge
Mode
Voltage Phase Test
IBAT > ITERM
Yes
No
Charge Completed
2556.2006.09.1.2
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