AAT3685IWP-4.2-1-T1 Advanced Analog Technology, Inc., AAT3685IWP-4.2-1-T1 Datasheet - Page 2

• Manufacturer Part Number: AAT3685IWP-4.2-1-T1
• Description: Lithium-Ion/Polymer Battery Charger
• Manufacturer: Advanced Analog Technology, Inc.

Pin Descriptions
Pin Configuration
2
Pin #
EP
10
11
12
1
2
3
4
5
6
7
8
9
ADP/USB
PWRSEL
Name
STAT2
STAT1
SETH
DATA
SETL
GND
CHR
BAT
EN
TS
Ground
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
Type
Out
Out
In
In
In
ADP/USB
Function
Line adapter or USB power supply input.
Battery charging and sensing.
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 ADP/USB
pin to disable this function.
Enable pin. Logic high enables the IC.
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.
When ADP/USB is present, use this pin to toggle between SETH and SETL
charging levels.
Connect resistor here to set charge current for low-current port.
Connect resistor here to set charge current for high-current port.
Exposed paddle (bottom); connect to GND directly beneath package.
GND
CHR
BAT
EN
TS
1
2
3
4
5
6
TDFN33-12
(Top View)
Lithium-Ion/Polymer Battery Charger
12
11
10
9
8
7
SETH
SETL
PWRSEL
STAT1
STAT2
DATA
AAT3685
3685.2006.10.1.3