PRODUCT DATASHEET
AAT3688
BatteryManager
TM
System Operation Flow Chart
Switch
On
USB Port Lithium-Ion/Polymer Battery Charger
Sleep
Mode
No
UVLO
V
P
> V
UVLO
Yes
USB
Power
USB Low
Current Loop
Power On
Reset
USB High
Current Loop
Yes
0
USB Detect
USBSEL= ?
1
Fault Conditions
Monitor
OV, OT
No
Shut Down
Mode
No
Battery
Temp. Fault
Yes
Battery
Temperature Monitor
V
TS1
< TS < V
TS2
USB Voltage
Regulation
Enable
No
Yes
Recharge Test
V
RCH
> V
BAT
Preconditioning Test
V
MIN
> V
BAT
Yes
Low Current
Conditioning
Charge
USB Voltage Test
V
USB
< 4.5V
No
No
Yes
Current Phase Test
V
EOC
> V
BAT
Current
Charging
Mode
Yes
USB
Loop Current
Reduction in USB
Charging Mode
No
Yes
Voltage Phase Test
I
BAT
> I
TERM
No
Charge
Completed
Voltage
Charging
Mode
12
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3688.2007.12.1.6
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
