DS51 Datasheet, PDF (27/41 Pages) Lumileds Lighting Company – the most robust and powerful LED

Current Derating Curve for 350 mA Drive Current
Red, Red Orange and Amber
400
350
300
250
200
150
100
Rθ_{J A}=50ºC/W
Rθ_{J A}=40ºC/W
Rθ_{J A}=30ºC/W
50
0
50
75
100
125
150
175
T_A - _TA_Am_-b_Ai_men_bt_ieT_ne_tm_Tep_mer_pa_et_ru_ar_te_ur(_eºC₍^°)_C)
Figure 21: Maximum forward current vs. ambient temperature, based on T_JMAX = 150ºC.
Current Derating Curve for 700 mA Drive Current
Cool White, Neutral White, Warm White
800
700
600
500
400
300
200
100
R^Rθ_J-J_AA=⁼4⁴0^0oC^ºC/^/W^W
R^Rθ_J-J_AA=⁼3³0^0oC^ºC/^/W^W
RRθ_J-JAA==2255^oCºC//WW
RRθ_J-JAA==2200^oCºC//WW
R_RθJ-JAA=₌15₁^o₅C_ºC/ W_/W
0
0
25
50
75 100 125 150
T_A -^TA^A m^{- A}b^mie^bnⁱt^eTⁿe^tm^Tp^ee^mr^pat^eu^rr^ae^tu(º^rC^e) ^{(ð C)}
Figure 22: Maximum forward current vs. ambient temperature, based on T_JMAX = 150ºC.
175
LUXEON K2 Datasheet DS51 (7/07)
27