Technical Design-in Guide Engine LLE G2 PRE KIT | 03-2020 | 1.2 | en
Thermal Aspects
c
44 / 63
LLE PRE 700 lm
ta
tp
Forward current
Rth, hs-a
Cooling area
25 °C
65 °C
125 mA
11.8 K/W
57 cm²
35 °C
65 °C
125 mA
8.8 K/W
75 cm²
45 °C
65 °C
125mA
5.9 K/W
113 cm²
55 °C
65 °C
125 mA
2.9 K/W
226 cm²
LLE PRE 1500 lm
ta
tp
Forward current
Rth, hs-a
Cooling area
25 °C
65 °C
275 mA
5.2 K/W
128 cm²
35 °C
65 °C
275 mA
3.9 K/W
171 cm²
45 °C
65 °C
275 mA
2.6 K/W
256 cm²
55 °C
65 °C
275 mA
1.3 K/W
514 cm²
All the values refer to a maximum surface temperature tc = 65 °C and 350 mA. The actual cooling surface can deviate depending on
the material, design, external influences and the installation situation. A thermal connection between LLE G2 PRE Module and the heat
sink using heat-conducting paste or heat-conducting adhesive foil is essential.
7.2.3. Temperature measurement on the module
t point LLE
c
There is a t point on top of the module for checking the temperature of the latter:
p
The temperature at the t point can be measured with a simple temperature probe. Since the underside of the modules is made from
p
anodised aluminium, any measurements taken with an infra-red camera would lead to inaccurate results.
