Tops 25 Power Warm White LED
OSM5XAHBE1E
VER . 1
■Heat design
The following pictures show some measurements of mounted 5W Led on the heat sink for each board A and B (See Fig 1) with
using thermograph to make an observation about heat distribution. Each boards is tested at various current conditions.
As a result, LED needs larger heat sink as much as possible to reduce its own case temperature.
Fig. 1 Configuration pattern examples for board assembly
Board
LED power
5W
Material
Surface area (m㎡) Min.
A
B
C
D
E
F
Al
Al
Al
Al
Al
Al
Al
10,300
20,600
10W
25W
51,500
50W
103,000
206,000
412,000
618,000
100W
200W
300W
G
Above tested LED device is attached with adhesive sheet to the heatsink.
For reference's sake, Tj absolute maximum rating is defined at 115℃ as a prerequisite on design process of 5W LED.
<Fig.2> Board A (surface area=10,300m㎡)
<Fig.3> Board B (surface area=20,600m㎡)
IF=600mA
IF=600mA
LED & Application Technologies
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VER A.0
OPTOSUPPLY [ OptoSupply International ]
