AAT3687_08 Datasheet, PDF (2/20 Pages) Advanced Analogic Technologies – Lithium-Ion/Polymer Battery Charger

BatteryManager^TM
PRODUCT DATASHEET
AAT3687
Lithium-Ion/Polymer Battery Charger
Pin Descriptions
Pin #
1
2
3
Name
BAT
ADP
GND
4
EN
5
ADPP#
6
TS
7
DATA
8
STAT2
9
STAT1
10
CT
11
N/C
12
ADPSET
EP
Type
Out
In
Ground
In
Out
In/Out
Out
Out
Out
In/Out
In/Out
Function
Battery charging and sensing.
Adapter input.
Ground connection.
AAT3687: Enable pin. Logic high enables the IC.
AAT3687-1, 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 pow-
ered 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
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3687.2008.04.1.12