AAT1239-1_0810 参数 Datasheet PDF下载

PRODUCT DATASHEET

AAT1239-1

SwitchReg

TM

Pin Descriptions

Pin #

1

2

3

4

5

6, 7

8

9

10

11

12

40V Step-Up Converter for 4 to 10 White LEDs

Symbol

PVIN

EN/SET

SEL

VIN

N/C

SW

PGND

AGND

FB

OVP

LIN

Function

Input power pin; connected to the source of the P-channel MOSFET. Connect to the input capacitor(s).

IC enable pin and S

2

Cwire input control to set output current.

FB voltage range select. 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.

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

No connection.

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

Power ground for the boost converter.

Ground pin.

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

Feedback pin for over-voltage protection sense.

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

Pin Configuration

TSOPJW-12

(Top View)

PVIN

EN/SET

SEL

VIN

N/C

SW

1

2

3

4

5

6

12

11

10

9

8

7

LIN

OVP

FB

AGND

PGND

SW

2

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1239-1.2008.10.1.2