Specifications

Design-in guide Philips Fortimo LED Line High Voltage System 30
• Limit the number of thermal interfaces in the primary heat path
towards the ambient air.
• Use thermal interface materials (TIM) to ensure proper thermal
contact, i.e. between the LED Line and heat sink.
• Ensure proper heat spreading by using materials with good
conductivity and/or materials of sufficient thickness to increase the
effective use of the available cooling surfaces.
• Anodized, painted surfaces are preferable to blank surfaces in order
to increase heat transfer via thermal radiation.
Contact Philips at any time if you need advice on your luminaire design
(see section entitled 'Contact details').
If you require further support with regard to thermal interface material
we recommend you contact one of our partners listed in the appendix.
Xitanium driver temperature
Label on Xitanium driver indicating Tc test point
The next important component is the driver, which influences the lifetime
and reliability of the system. In the design everything possible is done to
keep the component temperature as low as possible, but the design of the
luminaire and the ability to guide the heat out of the luminaire are of
utmost importance. Inside the driver the critical components for
temperature are:
• electrolytic capacitor
• solder joints
• semi-conductors.
Test point Xitanium driver
Tc of the Xitanium driver
To enable temperature measurement in a luminaire without measuring
the individual components in the electronic driver, a Tc point has been
defined (see figure „Tc point Xitanium driver‟). This point, or rather
details of where this point is located, can be found on the label of the
electronic driver. The specified temperature of this point is based on the
temperature of the components and the solder joints inside the electronic
driver. How this point relates to the temperature of the components and
solder joints is shown in the figure „Test point of the Xitanium driver‟.
Operation under built-in conditions
The heat produced by the LED Line and the driver in the luminaire (or
other housing) must be dissipated to the surroundings. If a luminaire is
thermally insulated by a ceiling, wall or insulation blanket, the heat
produced cannot be easily dissipated. This will result in additional heat
being applied to the driver and LED Line, which will have an adverse effect
on system performance and lifetime. To ensure optimum performance
and lifetime we recommend that air be allowed to flow freely around the
luminaire. Designing the luminaire in such a way that air can also flow
through it will provide extra cooling, which may be beneficial in certain
cases.