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LM3431 Datasheet - National Semiconductor

LM3431_NationalSemiconductor.pdf

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Datasheet Details

Part number:

LM3431

Manufacturer:

National Semiconductor

File Size:

621.22 KB

Description:

3-channel constant current led driver.

LM3431, 3-Channel Constant Current LED Driver

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

LM3431 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

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