AAT3685 Datasheet, PDF (12/23 Pages) Advanced Analogic Technologies – Lithium-Ion/Polymer Battery Charger

System Operation Flow Chart
AAT3685
Lithium-Ion/Polymer Battery Charger
Switch
On
Sleep
Mode
No
UVLO
Yes
VP > VUVLO
Input Power
Power On
Reset
SETL
Current Loop
SETH
Current Loop
0 _{Input Detect}
PWRSEL= ?
1
Fault
Yes
Conditions Monitor
OV, OT
No
Shut Down
Mode
Yes
Battery
No
Temperature Monitor
Battery
VTS1 < TS < VTS2
Temp. Fault
Input Voltage
Regulation
Enable
No
Recharge Test
V_RCH > V_BAT
Yes
Yes Low Current
Preconditioning Test
Conditioning
VMIN > VBAT
Charge
No
Current Phase Test ^Yes
V_EOC > V_BAT
Current
Charging
Mode
No
Yes
Voltage Phase Test
IBAT > ITERM
No
Charge
Completed
Voltage
Charging
Mode
No
Port
Voltage Test
V < V ADP/USB
ADP/USB_CHR
Yes
Charge
Current
Reduction
12
3685.2006.10.1.3