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LM3466 Datasheet Multi-String LED Balancer

Manufacturer: Texas Instruments

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General Description

The LM3466 integrates a linear LED driver for lighting systems which consist of multiple LED strings powered by a constant current power supply.

It balances the current provided by the supply in a preset ratio for each active LED string, where an active string is a fully turned on LED string, regardless of the number of strings connected to the supply or the forward voltage of each LED string.

If any LED string opens during operation, the LM3466 automatically balances the supply current through all of the remaining active LED strings.

Overview

LM3466 www.ti.com SNOSB96F – JUNE 2011 – REVISED NOVEMBER 2013 Multi-String LED Current Balancer for Use with Constant-Current Power Supplies Check for Samples:.

Key Features

  • 1.
  • 2 Easy to Design for Lighting Systems Consisting of Multiple LED Strings (Supports Modular Design).
  • Automatically Balances the Current of Every Active LED String, even the Forward Voltage of Each String is Different.
  • Easy to Pre-Set and Fine-Tune Current Ratio Among LED Strings (e. g. , color temperature adjustment or CRI Enhancement).
  • ±1% Current Accuracy at Room Temperature and ±1.5% Over Temperature.
  • Maintains Constant Output Power if Some Strings.

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