ACT111A

Rev 2, 22-Oct-12

- 2 -

www.active-semi.com

Copyright © 2012 Active-Semi, Inc.

ORDERING INFORMATION

PIN CONFIGURATION

PIN DESCRIPTIONS

PART NUMBER

TEMPERATURE RANGE

PACKAGE

PINS

PACKING

ACT111AUS-T

-40°C to 85°C

SOT23-6

6

TAPE & REEL

TOP MARK

FRWE

SOT23-6

ACT111AUS-T

PIN NUMBER

PIN NAME

PIN DESCRIPTION

1

FB

Feedback Input for regulating LED current. The voltage at this pin is regulated to

0.1V. An external resistor is connected from this pin to ground to sense the LED

current.

2

GND

Ground.

3

BST

Bootstrap pin. This provides power to the internal high-side N channel MOSFET

gate driver. Connect a 2.2nF capacitor from the pin to SW pin.

4

SW

Internal N channel power MOSFET source output pin. Connect it to one end of

power inductor.

5

IN

Power supply input. Bypass this pin with a 10µF ceramic capacitor to GND, placed

as close to the IC as possible.

6

DIM

PWM signal input for dimming control. Apply PWM signal with amplitude greater

than 2V to this pin. The device is enabled as DIM pin open and disabled when it is

connected to G.