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LM3431AQ Datasheet 3-Channel Constant Current LED Driver

Manufacturer: National Semiconductor (now Texas Instruments)

Download the LM3431AQ datasheet PDF. This datasheet also includes the LM3431 variant, as both parts are published together in a single manufacturer document.

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Note: The manufacturer provides a single datasheet file (LM3431_NationalSemiconductor.pdf) that lists specifications for multiple related part numbers.

General Description

The LM3431 is a 3-channel linear current controller combined with a boost switching controller ideal for driving LED backlight panels in space critical applications.

The LM3431 drives 3 external NPN transistors or MOSFETs to deliver high accuracy constant current to 3 LED strings.

Output current is adjustable to drive strings in excess of 200 mA.

Overview

LM3431/LM3431A/LM3431Q/LM3431AQ 3-Channel Constant Current LED Driver with Integrated Boost Controller LM3431/LM3431A/LM3431Q/ LM3431AQ www.DataSheet4U.

Key Features

  • LED cathode feedback to minimize regulator headroom and optimize efficiency. A DIM input pin controls LED brightness from analog or digital control signals. Dimming frequencies up to 25 kHz are possible with a contrast ratio of 100:1. Contrast ratios greater than 1000:1 are possible at lower dimming frequencies. The LM3431 eliminates audible noise problems by maintaining constant output voltage regulation during LED dimming. Additional features include LED short and open protection, fault delay/.

📁 Similar Datasheet

Brand Logo Part Number Description Manufacturer
Texas Instruments Logo LM3431 3-Channel Constant Current LED Driver Texas Instruments

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