Specifications

POWER
•
THERMAL
•
INTEGRATION
•
OPTICAL
Taking the heat
Can a
start a
revolution?
rebel
An extremely small footprint gives the LUXEON Rebel
versatility, particularly with applications requiring densely-
packed LED arrays. Also, because the thermal pad is over
1.8mm from the electrical
connections, thermal creepage is
kept to a minimum. This allows the
LUXEON Rebel to work with high
voltage differences, a critical
requirement for driving neatly
arranged serial strings of LEDs.
Another application requiring
multiple LEDs mounted in close
proximity is RGB mixing. The LUXEON
Rebel layout has a direct affect on the way in which designers
Design strategies
Ultra-compact, high power, and
with industry-leading flux density.
The LUXEON® Rebel boasts an
impressive specification, but what
does that mean to the designer?
Lighting designers will always want to
get the most from light sources. For
high-power LEDs that means delivering
more light from a smaller package.
The first and most obvious advantage
the LUXEON Rebel offers on this front,
is a footprint of just 3mm x 4.5mm.
Combined with industry-leading
luminous flux, these dimensions free
designers to create brighter LED
arrays and slimmer end-products, but
is there a catch?
The result of pushing light-output and board-
space boundaries is the inevitable
accumulation of thermal energy. Philips
Lumileds have addressed this in two ways: the
LUXEON Rebel operates with a maximum
junction temperature of 150°C and features an
20 LUXEON
®
Rebel = 316.5mm
2
75lm/LED = 1500 lumens @ 350mA
electrically-isolated thermal pad.
This allows pads to be mounted on a single heat-sink
without additional isolation or the use of an FR4 board with
thermal vias. As well as aiding thermal management, the
design of the LUXEON Rebel thermal pad and contact also
has implications for LED layout.
can achieve colour mixing.
As well as allowing a greater
number of LEDs on a single
board or under a single optic,
being placed in close proximity
means that LUXEON Rebel
devices can automatically
achieve a high level of colour
mixing at reduced distances of
around 15mm. This opens
new design possibilities for
power LEDs in areas such as
colour bricks, interior lighting
and video walls.