Datasheet > ACT111AUS-T

ACT111AUS-T

更新时间： 2022-10-08 16:57:04

品牌	Logo	应用领域
技领 - ACTIVE-SEMI		驱动
页数	文件大小	规格书
12页	527K
描述
4.8V to 30V Input, 1.5A LED Driver with Dimming Control

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ACT111AUS-T 数据手册

ACT111A

Rev 0, 14-Feb-11

4.8V to 30V Input, 1.5A LED Driver with Dimming Control

GENERAL DESCRIPTION

FEATURES

• Up to 92% Efficiency

The ACT111A is a high efficient LED driver

employing current-mode buck converter topology

that supplies up to 1.5A from wide input voltage

range from 4.8V up to 30V. The ACT111A is

designed to operate as a constant source with

1.4MHz fixed frequency. ACT111A consists of a

PWM control circuit, a high precision band-gap

voltage reference, an oscillator, an error amplifier

with internal compensation network and the N

channel power MOSFET. An external sense

resistor in series with the LED monitors output

current allowing accurate current regulation, ideal

for driving high current LEDs. The built-in fault

condition protection circuits including current

limiting, UVLO and thermal shutdown prevent itself

from potentially faulty operation and burn-out.

• Wide 4.8V to 30V Input Voltage Range

• 100mV Low Feedback Voltage

• 1.5A High Output Capacity

• PWM Dimming

• 10kHz Maximum Dimming Frequency

• Thermal Shutdown

• SOT23-6 Package

APPLICATIONS

• High Brightness LED Driver

• Architecture Detail Lighting

• Constant Current Source

The ACT111A is ideal for single 1W to 5W LED

drivers. With its ultra low feedback voltage, a low

current ripple, high efficiency of up to 92% step-

down power LED driver can be easily composed of

with additional several external components such

as an inductor, a Schottky diode, a few resistors

and capacitors.

• Hand-held Lighting

• Automotive RCL, DRL, and Fog Lights

• Indicators and Emergency Lighting

• MR16 and other LED Bulb

TYPICAL APPLICATION CIRCUIT

Innovative Power^TM

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