OVTL09LG3W Optek, OVTL09LG3W Datasheet - Page 12

• Manufacturer Part Number: OVTL09LG3W
• Description: LED High Power (> 0.5 Watts) Cool White 6400K 250lm 1050mA
• Manufacturer: Optek

Specifications of OVTL09LG3W

• Illumination Color: Cool White
• Wavelength/color Temperature: 7600 K
• Luminous Flux: 565 lm
• Power Rating: 10 W
• Operating Voltage: 10.2 V
• Operating Current: 1.05 A
• Minimum Operating Temperature: - 50 C
• Maximum Operating Temperature: + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Lednium Series Optimal X
OVTL09LG3x Series
Typical elements in the conducting path and corresponding nominal thermal conductivities are:
Note : Thermal conductivity is a physical constant. For the materials above, the respective contribution each makes
to the overall thermal resistance (Rθ
Thermal Conductivity (TC) is defined to be the heat conducted in time (t), through thickness (T) in a direction normal
to a surface area (A), due to a temperature difference (δT).
Theoretical Calculation (for 1 watt dissipated in a cup product via a single 40mil die)
GaN
Substrate
Die attach
Package
Solder
Issue B.2 07/08
Page 12 of 14
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Thickness approx 10 x 10
Area 10
T = 60 x 10
T = 20 x 10
A = 2 x 10
T = 0.4x10
A = 6x10
T = 60x10
A = 6x10
-6
Therefore
-6
-6
-6
-6
-3
-6
-6
and
Total Calculated δT = 2.86K
Epilayers
Substrate
Die attach material
Package
Solder
Copper cladding
Phone: [phone] or [phone] FAX: [phone] [e-mail] www.optekinc.com
j-b
) is a function of the thickness of each material layer, and the surface area.
TC= q/t x {T/[A x δT]}
δT = [Q x T]/[A x TC]
-6
= 1 x 20x10
= 1
= 1 x 0.4x10
= 0.19
= 1 x 60x10
= 0.4
= 1 x 10x10
= 0.07 K
= 1 x 60x10
= 1.2 K
Elements
GaN/InGaN
Sapphire
Conductive epoxy
Silver plated copper
Solder (Sn/Ag/Cu)
Copper
-6
-6
-6
-6
-3
/6x10
/ 10
/ 10
/ 2x10
/ 6x10
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
where δT = Temp. difference (K)
-6
-6
-6
x 150
x 50
-6
-6
x 25
x 10
x 350
Q = Power (w)
TC = Thermal Conductivity (w/mK)
A = Surface area (m
T = layer thickness (m)
w/mK
150
350
300
50
10
35
2
)