Bridgelux LED Arrays

Source: Bridgelux

Introduction Purpose

This training module introduces Bridgelux LED array products and application considerations.

Outline Overview of the LED array family

Product selection guide

Thermal management

Recommended assembly

Content 13 pages

Bridgelux LED Arrays

Deliver the light required for general lighting applications

Provide illumination-grade, high-quality white light

Enable effective thermal management by leveraging Bridgelux’s proprietary Metal BondTechnology

Reduce system cost and enable simplified luminaire designs

Features & Benefits

Features: Compact high flux density light

source

Uniform high quality illumination

Streamlined thermal path

Energy Star / ANSI compliant binning structure

More energy efficient than incandescent, halogen and some fluorescent lamps

Low voltage DC operation

Instant light with unlimited dimming

Long operating life

Benefits Enhanced optical control

Significantly reduced thermal resistance and increased operating temperatures

Uniform consistent white light

Lower operating costs

Increased safety

Easy to use with daylight and motion detectors to enable increased energy savings

Reduced maintenance costs

Environmentally friendly, no disposal issues

Product Nomenclature

Product Family Name Color

Light Output

Reserved

Lumen Comparison

Product Selection Guide

Temperature vs. Performance

As temperature increase, several performance characteristics are changed.

Light output decreases

Forward voltage decreases

The color temperature shifts towards blue

Absolute maximum ratings, such as maximum case temperature and maximum junction temperature, must not be exceeded.

Optimization of performance and reliability in a lighting system requires proper thermal management.

Thermal Management – Hear Generation

As LEDs are not 100% efficient at converting input power to light, some of the energy is converted into heat.

The amount of heat generated from the LED Array that must be transferred to the ambient may be calculated by

Heat generated by additional sources, such as a power supply located near the LED, must also be managed.

In order to minimize the amount of additional heat added to the system, power supplies and other heat generating components should not be located in close proximity to the LED Array.

ffd IVP

Thermal Management – Thermal Path

For a simple thermal management solution that consists of an LED Array mounted to a heat sink, the thermal path includes:

Heat is conducted from the semiconductor chip within the LED Array to the elements that make up the LED Array

Heat is then conducted from the LED Array through a thermal interface material to the heat sink of the lighting system.

Heat is then conducted through the heat sink.

Heat is then convected to the air around the heat sink and is radiated to the ambient.

Thermal Solution Components

Heat Sinks Heat sinks conduct heat from a heat source and then convect

the heat to the ambient.

The size of a required heat sink depends on many variables including

the temperature requirements for the application

the material of the heat sink

the surface characteristics of the heat sink

Thermal Interface materials thermal greases

Pastes

Adhesives

Recommended Assembly

A robust mechanical connection between the LED Array and the heat sink or lighting fixture body.

A thermally conductive path from the case (or back) of the LED Array to the heat sink or lighting fixture body.

An electrical connection between the solder pads on the LED Array and the power supply or electronic driver used to power the LED Array.

Additional Resource

For ordering Bridgelux LED Arrays, please click the part list or

Call our sales hotline

For additional inquires contact our technical service hotline

For more product information go to

http://www.bridgelux.com/products/ledarray_productdoc.html

Newark Farnell