AAT3688_08 Datasheet, PDF (12/21 Pages) Advanced Analogic Technologies – USB Port Lithium-Ion/Polymer Battery Charger

BatteryManager^TM
System Operation Flow Chart
PRODUCT DATASHEET
AAT3688
USB Port Lithium-Ion/Polymer Battery Charger
Switch
On
Sleep
Mode
No
UVLO
Yes
V_P > V_UVLO
USB
Power
Power On
Reset
USB Low
Current Loop
USB High
Current Loop
Fault Conditions
Yes
Monitor
OV, OT
No
Shut Down
Mode
Yes
Battery
No
Temperature Monitor
Battery
V_TS1 < TS < V_TS2
Temp. Fault
0 _{USB Detect}
USBSEL= ?
1
USB Voltage
Regulation
Enable
No
Recharge Test
V_RCH > V_BAT
Yes
Yes _{Low Current}
Preconditioning Test
Conditioning
V_MIN > V_BAT
Charge
No
Yes
Current Phase Test
V_EOC > V_BAT
Current
Charging
Mode
No
Yes
Voltage Phase Test
I_BAT > I_TERM
No
Charge
Completed
Voltage
Charging
Mode
No
USB Voltage Test
V_USB < 4.5V
Yes
USB
Loop Current
Reduction in USB
Charging Mode
12
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3688.2007.12.1.6