AAT3685-1 Advanced Analog Technology, Inc., AAT3685-1 Datasheet - Page 2

• Manufacturer Part Number: AAT3685-1
• Description: Lithium-Ion/Polymer Battery Charger
• Manufacturer: Advanced Analog Technology, Inc.

Pin Descriptions
Pin Configuration
2
2
BatteryManager
BatteryManager
Pin #
10
11
12
EP
1
2
3
4
5
6
7
8
9
ADP/USB
PWRSEL
Name
STAT2
STAT1
DATA
SETH
SETL
GND
CHR
BAT
EN
TS
TM
TM
Ground
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
Type
Out
Out
In
In
In
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.
ADP/USB
GND
CHR
BAT
EN
TS
w w w . a n a l o g i c t e c h . c o m
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1
2
3
4
5
6
TDFN33-12
(Top View)
Lithium-Ion/Polymer Battery Charger
Lithium-Ion/Polymer Battery Charger
12
11
10
9
8
7
STAT1
DATA
SETH
SETL
PWRSEL
STAT2
PRODUCT DATASHEET
PRODUCT DATASHEET
AAT3685
AAT3685
3685.2007.12.1.4
3685.2007.12.1.4