13

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

500

1000

1500

2000

2500

3000

3500

0

20

40

60

80

100

120

140

160

Ambient Temperature (ºC)

Rj-a = 4°C/W

Rj-a = 7°C/W

Rj-a = 10°C/W

Rj-a = 15°C/W