AAT3686 Datasheet, PDF (12/24 Pages) Advanced Analogic Technologies – USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger

AAT3686
USB Port/AC Adapter
Lithium-Ion/Polymer Battery Charger
When the input supply is disconnected or drops
below UVLO or EN = 0, the charger will automati-
cally enter power-saving sleep mode. Consuming
an ultra-low 0.3µA in sleep mode (1µA for
AAT3686-1), the AAT3686 minimizes battery drain
when it is not charging. This feature is particularly
System Operation Flow Chart
useful in applications where the input supply level
may fall below the battery charge or under-voltage
lockout level. In such cases where the AAT3686
input voltage drops, the device will enter sleep
mode and automatically resume charging once the
input supply has recovered from its fault condition.
Output
ADPP
Yes
ADP
Voltage Test
ADP > V_ADPP
No
ADP
Loop
ADP
Power Select
USB
Yes
UVLO
V_P > V_UVLO
Yes _Switch
On
No
No
Sleep
Mode
Enable
Power On
Reset
USB Low
0
Current Loop
USB Detect
USBSEL = ?
Thermal
Loop Enable
USB High
1
Current Loop
Fault
Yes
Conditions Monitor
OV, OT
Yes
No
Shutdown
Mode
Battery
Temp. Monitor
V_TS1 < TS < V_TS2
No
Battery
Temp. Fault
Timing
Expire
No
Device Temp. Monitor
T_J > 110°C
Yes
Thermal Loop
Current
Reduction in ADP
Charging Mode
Charge
Safety
TiTmimerer
No
Yes
Yes Low Current
Set
Recharge Test
Preconditioning Test
Conditioning
V_RCH > V_BAT
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
Voltage
Charging
Mode
No
Charge
Completed
USB Voltage
Regulation
Enable
USB Loop
Current
Reduction in USB
Charging Mode
Yes
No
USB Voltage Test
V_USB < 4.5V
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3686.2006.10.1.9