PRODUCT DATASHEET
AAT2557
TM
SystemPower
500mA Battery Charger and 300mA LDO Regulator for Portable Systems
Battery Charging System Operation Flow Chart
Enable
Power On Reset
No
Yes
Power Input
Voltage
VADP > VUVLO
Yes
Fault Conditions
Monitoring
OV, OT
Charge
Control
Shut Down
Yes
No
Preconditioning
Test
Preconditioning
(Trickle Charge)
Yes
V
MIN > VBAT
No
No
Constant
Current Charge
Mode
Recharge Test
Current Phase Test
CO(REG) > VBAT
Yes
Yes
V
RCH > VBAT
V
No
Constant
Voltage Charge
Mode
Voltage Phase Test
IBAT > ICH_TERM
Yes
No
Charge Completed
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2557.2009.07.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
