DS45 Datasheet, PDF (13/17 Pages) Lumileds Lighting Company – power light source LUXEON® III Emitter

Current Derating Curves
1100
1000
900
800
700
600
500
400
300
200
100
0
R θ _J-A =30 ^oC / W
R θ _J-A =25 ^oC / W
R θ _J-A =20 ^oC / W
R θ _J-A =15 ^oC / W
0 25 50
75 100 125 150
T_A - Am bient Tem perature ( ^ο C)
Figure 8. Maximum Forward Current vs. Ambient Temperature.
Derating based on T_JMAX = 135°C for White, Green, Cyan, Blue, and Royal Blue. Since LUXEON III may be driven at up to 1000mA,
derating curves may not be applicable for all operating conditions.
1600
1400
1200
1000
800
600
400
200
Rθ_J-A=25^oC/W
Rθ_J-A=20^oC/W
Rθ_J-A=15^oC/W
Rθ_J-A=10^oC/W
0
0 25 50
75 100 125 150
T_A - Ambient Temperature ( ^oC)
Figure 9. Maximum Forward Current vs. Ambient Temperature
derating based on T_JMAX = 135°C for Red, Red Orange, and Amber.
LUXEON III Emitter DS45 (3/06)
13