Pin Descriptions

Pin Configuration

TDFN33-12

(Top View)

BAT

ADP

GND

1

EN

ADPP#

TS

ADPSET

N/C

CT

STAT1

STAT2

DATA

2

3

4

5

6

12

11

10

9

8

7

Pin #

Name

Type

Function

1

BAT

Out

Battery charging and sensing.

2

ADP

In

Adapter input.

3

GND

Ground

Ground connection.

4

EN

In

Enable pin. Logic high enables the IC..

5

ADPP#

Out

Adapter present indicator. This pin is open drain until ADP pin reaches

threshold.

6

TS

In/Out

Battery temperature sense input.

7

DATA

Out

Status report to microcontroller via serial interface: open drain.

8

STAT2

Out

Battery charge status indicator pin to drive an LED: active low, open drain.

9

STAT1

Out

Battery charge status indicator pin to drive an LED: active low, open drain.

10

CT

In/Out

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.

11

N/C

No connection.

12

ADPSET

In/Out

Use resistor at this pin to set adapter charging current.

EP

Exposed paddle (bottom); connect to GND directly beneath package.

AAT3697

2A Lithium-Ion/Polymer Battery Charger

2

3697.2007.02.1.1