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Thermal Design-In
Design-in Guide - Philips Xitanium LED Xtreme SR driver
Introduction
This section describes the following aspects of the thermal design-in
of the Xitanium LED Xtreme SR drivers:
1. The LED driver and the relationship between the Tc point
temperature and lifetime of the LED driver.
2. The LED driver and its non-adjustable response to driver
overheating (ThermalGuard).
3. The LED driver and configurable Driver Temperature Limit
(DTL) to maximize driver and possibly LED module lifetime in
the application.
4. Module Temperature Protection (MTP) function to safeguard
the specified LED module lumen maintenance and lifetime.
To facilitate design-in of LED drivers, the critical thermal
management points of the LED driver are set out in this section. In
Philips' product design phase all possible precautions have been
taken to keep the component temperature as low as possible.
However, the design of the luminaire and the ability to guide the
heat out of the luminaire are of utmost importance. If these thermal
points are taken into account this will ensure the optimum
performance and lifetime of the system.
Driver case temperature point (t
To achieve optimal lifetime and reliability, it is critical that the
temperature of the components in the driver remains within its
rating.
The driver case temperature (t
temperatures of the critical internal driver components. The
location of the t
point is identified on the product type plate and is
c
marked by a * or
symbol.
O
How to measure t
point temperature
c
Its temperature can be measured using a thermocouple that is
firmly glued to the driver housing. For a representative
measurement the temperature of the t
any reliable data can be obtained (typically > 3 hours or when the
temperature difference is less than 1°C within one hour)
Note: Xitanium Xtreme SR drivers allow for a driver-
internal temperature
readout
Diagnostics feature. This readout is purely
purposes and does
not represent
temperature. Therefore, this readout should not be used to
define thermal suitability of the driver in the application.
point)
c
) is a reference for the
c
point must be stable before
c
through
the
MultiOne
for
diagnostic
the
driver
t
point
c
11
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