bridgelux led arrays
DESCRIPTION
Introduction of Bridgelux LED array products and application considerationsTRANSCRIPT
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.
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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