14

tyPiCAL sPAtiAL Distribution

thErMAL DEsiGn

The maximum forward current is determined by the thermal resistance between the LED junction and ambient. It is crucial for the end

product to be designed in a manner that minimizes the thermal resistance from the solder point to ambient in order to optimize lamp life

and optical characteristics.

Typical Spatial Radiation Pattern

0%

20%

40%

60%

80%

100%

-90

-70

-50

-30

-10

10

30

50

70

90

Angle (º)

Thermal Design

0

250

500

750

1000

1250

1500

1750

2000

2250

0

20

40

60

80

100

120

140

160

Ambient Temperature (ºC)

Rj-a = 10°C/W

Rj-a = 15°C/W

Rj-a = 20°C/W

Rj-a = 25°C/W