AT1312A/B/C

Preliminary Product Information

High Efficiency, Constant Current

White-LEDs Driver

7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

2/23/2006 REV:1.1

2

Pin Configuration

54

1

3

2

SOT-25

(TOP VIEW)

FB

VIN

LX

EN

GND

312

OVP

A:1312AX

B:1312BX

C:1312CX

6

Ordering Information

Part number

Package

Current

Limit

OVP

Protection

Marking

AT1312AX

SOT-26

400mA

28V

Date Code

AT1312AX_GRE SOT-26, Green 400mA

28V

,Date Code with one bottom

line

AT1312BX

SOT-26

300mA

23V

Date Code

AT1312BX_GRE SOT-26, Green 300mA

23V

,Date Code with one bottom

line

AT1312CX

SOT-26

200mA

16V

Date Code

AT1312CX_GRE SOT-26, Green 200mA

16V

,Date Code with one bottom

line

: Date Code

Pin Description

Pin N0.

Symbol

I / O

Description

1

LX

I

Step-up Regulator N-MOS Drain. Place output diode and inductor.

2

GND

P

Ground

3

FB

I

Step-Up Regulator Feedback Input. Connect a sense resistor from FB to

ground.

4

EN

I

Enable and Dimming Control Input. LED brightness and IC shutdown are

controlled by the voltage on EN. Driving low for longer than 4ms to

shutdown the IC.

5

OVP

I

Over-voltage protection input. Connect to the output.

6

VIN

P

Power supply.