XLAMP® XP-G3 LED

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the Cree LED logo is a trademark, of Wolfspeed Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered

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CLD-DS139

REV 9

23

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.

White (Standard)

White (S Line)

Thermal Design - white

0

250

500

750

1000

1250

1500

1750

2000

2250

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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

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

Royal Blue

Photo Red (Standard)

Thermal Design-royal blue

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

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

Thermal Design-photo red standard

0

250

500

750

1000

1250

1500

1750

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

Photo Red (S Line)

Thermal Design-S Line photo red

S Line Photo Red from: XPGD_Red_G2 Datasheet 201217.xlsx

0

250

500

750

1000

1250

1500

1750

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

diagrams and headings are in a table