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Access to light is something that many in the western nations take for granted and much
of this light is produced by using incandescent and fluorescent forms of lighting. Light
Up The World (LUTW) is an organisation, based in Canada, which aims to assist poor
and remote villages in developing countries obtain a reliable and affordable means of
lighting their homes by leading the way in utilizing low energy White Light Emitting
Diodes (WLED’s) to provide an efficient, reliable, and safe form of lighting.
The WLED’s being used in this project are a revolutionary, energy efficient and ultra
compact new light source, combining the lifetime and reliability advantages of Light
Emitting Diodes with the brightness of conventional lighting. These WLED’s require
more power than conventional LED’s and to ensure optimum light output, they must be
driven at a constant current.
A typical household may install up to three WLED’s for the lighting of the entire home
and thus, the aim of this thesis is to provide a means of powering 3 LED’s from a single
driving circuit, so as to reduce the cost of having a driver for each LED. It is hoped that
by designing a single device which is capable of driving up to 3 Luxeon LED’s that it
will assist LUTW in it’s goal of providing efficient, reliable and safe lighting to those in
developing countries.

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