AAT3687 Datasheet, PDF (2/22 Pages) Advanced Analogic Technologies – Lithium-Ion/Polymer Battery Charger

AAT3687
Lithium-Ion/Polymer Battery Charger
Pin Descriptions
Pin #
1
2
3
4
Name
BAT
ADP
GND
EN
Type
Out
In
Ground
In
5 ADPP# Out
6
TS
In/Out
7
DATA
Out
8 STAT2 Out
9 STAT1 Out
10
CT
In/Out
11
N/C
12 ADPSET In/Out
EP
Function
Battery charging and sensing.
Adapter input.
Ground connection.
AAT3687: Enable pin. Logic high enables the IC.
AAT3687-2: Enable pin. Logic high enables the IC. EN tied to internal
4MΩ pull-up resistor to ADP.
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. If timing
function is not needed, terminate this pin to ground.
No connection.
Use resistor at this pin to set adapter charging current.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
TDFN33-12
(Top View)
BAT ¹
ADP ²
GND ³
EN ⁴
ADPP# ⁵
TS ⁶
12 _ADPSET
11 _N/C
10 _CT
9 _STAT1
8 _STAT2
7 _DATA
2
3687.2006.06.1.5