AAT1231ITP-1-T1 datasheet(2/27 Pages) ANALOGICTECH

Part #	AAT1231ITP-1-T1

Description	Step-Up DC/DC Converters for White LED Backlight Applications

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Manufacturer	ANALOGICTECH [Advanced Analogic Technologies]

Direct Link	http://www.analogictech.com

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Pin Descriptions

Pin Configuration

TSOPJW-12

(Top View)

1

2

3

4

5

6

12

11

10

9

8

7

PVIN

EN/SET

SEL

VIN

N/C

SW

LIN

OVP

FB

AGND

PGND

SW

Pin #

Symbol

Function

1

PVIN

Input power pin; connected to the source of the P-channel MOSFET. Connect to the

input capacitor(s).

2

EN/SET

IC enable pin and S2Cwire input control to set output current.

3

SEL

FB voltage range select.

For the AAT1231, a logic LOW sets the FB voltage range from 0.1V to 0.4V; a logic

HIGH sets the FB voltage range from 0.3V to 0.6V.

For the AAT1231-1, a logic LOW sets the FB voltage range from 0.4V to 0.1V; a logic

HIGH sets the FB voltage range from 0.6V to 0.3V.

4

VIN

Input voltage for the converter. Connect directly to the PVIN pin.

5

N/C

No connection.

6, 7

SW

Boost converter switching node. Connect the power inductor between this pin and LIN.

8

PGND

Power ground for the boost converter.

9

AGND

Ground pin.

10

FB

Feedback pin. Connect a resistor to ground to set the maximum LED current.

11

OVP

Feedback pin for over-voltage protection sense.

12

LIN

Switched power input. Connect the power inductor between this pin and SW.

AAT1231/1231-1

Step-Up DC/DC Converters for

White LED Backlight Applications

2

1231.2007.01.1.2

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