AAT3686_08 Datasheet, PDF (2/23 Pages) Advanced Analogic Technologies – USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger

BatteryManager^TM
PRODUCT DATASHEET
AAT3686
USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger
Pin Descriptions
Pin #
(TDFN34-16/
TDFN44-16)
1
2
3
4
5
6
7
8
9
10
11
Name
USB
BAT
ADP
GND
CHR
EN
ADPP#
TS
DATA
STAT2
STAT1
12
CT
13
USBSEL
14
USBL
15
USBH
16
ADPSET
EP
Type
In
In/Out
In
Ground
In/Out
In
Out
In/Out
In/Out
Out
Out
In/Out
In
In/Out
In/Out
In/Out
Function
USB power supply input.
Battery charging and sensing.
Adapter input.
Ground connection.
Resistor divider to set USB voltage regulation for charge reduction mode. Leave
this pin open for default 4.5V USB regulation point. Tie to USB pin to disable this
function.
Enable pin. Logic high enables the IC.
Adapter present indicator. This pin is open drain until ADP pin reaches threshold
Connect to 10kΩ NTC thermistor.
Status report to microcontroller via serial interface, open-drain.
Battery charge status indicator pin to drive an LED: active low, open-drain.
Battery charge status indicator pin to drive an LED: active low, open-drain.
Timing capacitor to adjust internal watchdog timer. Set maximum charge time for
adapter powered trickle, CC, and CV charge modes. The watchdog timer only sets
the timers for adapter battery charging; there is no timeout for the battery charg-
ing from the USB input. If timing function is not needed, terminate this pin to
ground.
When USB is present, use this pin to toggle between 100mA and 500mA limit.
Connect resistor here to set charge current for low-current USB port.
Connect resistor here to set charge current for high-current USB port.
Use resistor at this pin to set adapter charging current.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
TDFN34-16
(Top View)
TDFN44-16
(Top View)
USB ¹
BAT ²
ADP ³
GND ⁴
CHR 5
EN ⁶
ADPP# ⁷
TS ⁸
16 _ADPSET
15 _USBH
14 _USBL
13 _USBSEL
12 _CT
11 STAT1
10 _STAT2
9 _DATA
USB ¹
BAT ²
ADP ³
GND 4
CHR 5
EN ⁶
ADPP# ⁷
TS ⁸
16 _ADPSET
15 _USBH
14 _USBL
13 _USBSEL
12 _CT
11 _STAT1
10 _STAT2
9 _DATA
2
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3686.2007.12.1.11