LG Innotek COB LED Series Installation and operating instructions

Application Note
COB LED Series
(4W, 7W, 10W, 13W, 17W, 24W)
RoHS
Compliant
CUSTOMER : .
DATE : Feb 24. 2014.
REV : REV. 0.3 .

CONTENTS
2
1. Introduction
1.1 Product Overview
1.1.1 Product Description
1.1.2 Outline Dimensions
1.1.3 Product Benefits and Features
1.2 ProductApplication
1.2.1 COB LED Applications
1.3 Caution
2. Product & Technical Guidance
2.1 Optical Properties
2.1.1 Chromaticity Bins
2.1.2 Spectrum Distribution
2.1.3 CRI Information
2.1.4 Luminous Intensity Diagram /Angular color Uniformity
2.1.5 Viewing Angle
2.1.6 Ray File Set
2.1.7 Hot Cold Factor
2.2 Thermal Properties
2.2.1 Thermal Design Guide (Thermal resistance)
2.2.2 Thermal Design Guide (Simulation)
2.3 Soldering and Handling
2.3.1 Handling Guide
2.3.2 Soldering Guide
2.3.3 Connector using guide
Page
4
4
5
6
7
9
11
11
12
12
13
14
16
17
22
23
24

CONTENTS
3
2.4 Nomenclature Code
2.4.1 LED Part Number Nomenclature
3. 2nd Optical Design
3.1 2nd Optical Design Guide
3.1.1 Availability
3.1.2 2nd optic Product List
3.1.3 2nd Optic Characteristics
4. COB Driver Guide
4.1 Recommended COB Drivers
5. Eco system
5.1 Downlight Production Guide
6. Reliability
4.1 LM-80 Test Results
4.1.1 IES LM-80-2008 Test Results
7. Certification & Safety
5.1 Certification & Safety
8. Additional Information & Caution
6.1 Risk of Sulfurization
6.2 Quality Issue of LED during Operation
9. Revision History
Page
26
27
28
29
31
33
34
35
36
38
39

1.1.1 Product Description
( Unit : mm )
1.1.2. Outline Dimensions
•Lighting Color : White
•4W / 7W COB LED : 14 x 14 x 1.00 mm / 0.85 mm (L x W x H)
•10W, 13W, 17W, 24W COB LED : 18 x 24 x 0.85 mm (L x W x H)
•Top-side solder connection
1. Introduction
Top View Side View
1.1 Product Overview
4
Circuit diagram
4W, 7W
10W/13W/17W/24W
10W
13W
17W
4W
Tc Measurement point
Tc Measurement point
24W
4W
7W
7W
7W
10W/13W/17W/24W

•High efficiency & brightness
•Long lifetime and high reliability
•Economical & eco-friendly
•Simplifies the manufacturing process
•Platform dimension at 10W, 13W, 17W, 24W
(easy to design the lens, connector and so on)
•Connector Solution Service
1. Introduction
1.1 Product Overview
1.1.3 Product Benefits and Features
5
10W, 13W, 17W, 24W
Cool Warm
4W / 7W
Cool Warm
14 x 14 x 1.00 / 0.85 mm (L x W x H) 14 x 14 x 1.00 / 0.85mm (L x W x H)
18 x 24 x 0.85 mm (L x W x H) 18 x 24 x 0.85 mm (L x W x H)

LG Innotek COB LED packages can be used in various lighting applications as
illustrated below.
1. Introduction
1.2 Product Application
Retrofit Lamp
•Bulb
•MR16
•PAR 30(38)
Outdoor
•Street & Tunnel
•Parking Area
•Architectural
1.2.1 COB LED Applications
6
Down Lights
Spot Lights

1. Introduction
1.3 Caution
Please follow the guidelines for efficient and safe usage of COB LED as below.
Storage
1) LG Innotek LED must be stored under the above conditions.(JEDEC MSL : 2a)
2) To minimize moisture absorption into the products during the transportation and
storage, the products must be packed in a vacuum sealing bags.
3) If a unused LEDs remain, they should be stored in hermetically sealed
container with desiccants (silica gel).
4) If baking is required, devices must be baked (i.e in a dry oven) for 10 ~ 24 hours
at 65℃±5.
5) The LED should avoid direct contact with hazardous materials such as sulfur,
chlorine, phthalate, etc…
The silver-plated metal part on LEDs can be rusted when exposed to corrosive
gases. The corrosive atmosphere must be avoided during the use and storage.
Due to possible sulfurization of silver-plated metal, LED should not be used and
stored together with oxidizing substances made of materials in a following list,
: solder cream, plain paper, rubber and so on.
Electrical
1) The current to the each LED must not exceed the absolute maximum
rating when design the circuits.
2) This product should be operated in forward bias.
3) For outdoor use, necessary precautions should be taken to prevent water,
moisture and salt air damages.
Conditions Temperature Humidity Duration
Storage
Before Opening
Sealing Bag ＜30℃＜50%RH within 1 Year from Delivery Date
After Opening
Sealing Bag ＜30℃＜60%RH ≤ 672 hours
Baking 65 ±5℃＜10%RH 10 ~ 24 hours
7
JEDEC Standard MSL : 2a

1. Introduction
1.4 Caution(continued)
Handling
1) Do not touch or push on the optical surfaces.
2) If the product is dropped, it may cause damage. Please refer to the illustrations
and the comments from section at 2.3.1.
ESD
1) It is strongly recomended that wristbands and anti-electrostatic gloves be worn
and all devices, equipment and machinery be properly grounded when handling
the LEDs which are sensitive to static electricity and surge.
Thermal management
1) There should be adequate thermal management to prevent the LED die
temperature from exceeding the specified maximum junction temperature.
Cleaning
1) If required, isopropyl alcohol (IPA) should be used.
Eye Safety Guidelines
1) Do not directly look at the light when the LEDs are on.
2) Proceed with caution to avoid the risk of damage to the eyes when examining
the LEDs with optical instruments.
Others
1) The stated information in the application note assumes typical equipment being
operated under normal operating conditions.Additional precautionary considerations
may be required for specialized equipment and/or unique circumstances.
2) Any disassembly of LG Innotek components for the purpose of reverse
engineering without written consent by LG Innotek is strictly prohibited.
3) The appearance and specifications of the products may be changed without
notice.
8

2. Product & Technical Guidance
2.1.1 Chromaticity Bins
2.1 Optical Properties
9
LG Innotek complies with the ANSI C78.377A standard for its chromaticity bin
structure. For each ANSI quadrangle for the CCT range of 4500K to 6500K, LG
Innotek provides 9 / 16 micro bins.
- 2, 4 SDCM optional.
* F, I color bins are not available but can be developed within 1 month based on demand.
BIN 4500K 5000K 5700K 6500K
Cx Cy Cx Cy Cx Cy Cx Cy
7 SDCM
0.3376 0.3616 0.3207 0.3462
0.3366 0.3369 0.3222 0.3243
0.3515 0.3487 0.3366 0.3369
0.3551 0.3760 0.3376 0.3616
4 SDCM
0.3416 0.3589
0.35 0.3657
0.3485 0.3524
0.3407 0.3462
2 SDCM
0.3429 0.3507
0.3434 0.3571
0.3475 0.3604
0.3469 0.3539
0.30
0.31
0.32
0.33
0.34
0.35
0.36
0.37
0.38
0.39
0.40
0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38
Cy
Cx
CIE X
CIE Y
4500K
5000K
5700K
6500K
7 SDCM
4 SDCM
2 SDCM

2. Product & Technical Guidance
2.1 Optical Properties
10
2.1.1 Chromaticity Bins (Continued)
LG Innotek complies with the ANSI C78.377A standard for its chromaticity bin
structure. For each ANSI quadrangle for the CCT range of 2700K to 4000K, LG
Innotek provides 16 micro bins.
- 2, 4 SDCM optional.
CIE X
0.33
0.34
0.35
0.36
0.37
0.38
0.39
0.40
0.41
0.42
0.43
0.44
0.45
0.36 0.37 0.38 0.39 0.40 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48 0.49
Cy
Cx
CIE Y
CIE X
2700K
3000K
4000K
3500K
7 SDCM
4 SDCM
2 SDCM
* K color bin is not available but can be developed within 1 month based on demand.
BIN 2700K 3000K 3500K 4000K
Cx Cy Cx Cy Cx Cy Cx Cy
7 SDCM
0.4562 0.4260 0.4299 0.4165 0.3736 0.3874
0.4373 0.3893 0.4147 0.3814 0.3670 0.3578
0.4593 0.3944 0.4373 0.3893 0.3898 0.3716
0.4813 0.4319 0.4562 0.4260 0.4006 0.4044
4 SDCM
0.4575 0.4181 0.4323 0.4098 0.3785 0.3841
0.4477 0.3996 0.4243 0.3921 0.3746 0.3689
0.4590 0.4023 0.4360 0.3962 0.3866 0.3762
0.4697 0.4209 0.4450 0.4144 0.3915 0.3922
2 SDCM
0.4578 0.4138 0.4333 0.4062 0.3804 0.3818
0.4528 0.4046 0.4291 0.3973 0.3784 0.3741
0.4586 0.4060 0.4351 0.3994 0.3844 0.3778
0.4638 0.4152 0.4395 0.4084 0.3867 0.3857

-20
0
20
40
60
80
100
120
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Warm (min 80)
Neutral (min 80)
Cool (min 80)
High CRI Warm
2. Product & Technical Guidance
2.1.2 Spectral Power Distribution
2.1.3 CRI Information
2.1 Optical Properties
Ra and R Values
11
* Neutral : 4000K & 4500K
0
20
40
60
80
100
120
380 430 480 530 580 630 680 730 780
Cool
Neutral
Warm
High CRI(Warm)
Wavelength (nm)
Relative Luminous Intensity (a.u.)

2. Product & Technical Guidance
12
Radial
Sequence1 - Phi=0
Sequence1 - Phi=90
-90
-45
0
45
90
Theta / °
010 1020 2030 3040 4050 5060 6070 7080 8090 90
Photometric / %
(1)
2
2.1.4 Luminous Intensity Diagram / Angular color Uniformity
2.1.5 Viewing Angle
2.1 Optical Properties
116˚
0
0.2
0.4
0.6
0.8
1
1.2
-90 -60 -30 0 30 60 90
Relative Luminous Intensity
Viewing Angle ( ˚ )
Viewing Angle ( ˚ )
Luminous Intensity Diagram Angular color Uniformity
-90 -60 -30 0 30 60 90
-90 -60 -30 0 30 60 90

2. Product & Technical Guidance
2.1.6 Ray File Set
2.1 Optical Properties
13
The available optical design files for the LG innotek COB LED package are shown
in the below table. The files can be downloaded directly from the LG Innotek web
site.
Also, the focal point (0. 0. 0) for all LEDs to match the rayset was marked in the
step files as a modeling file, which can create accurate optical/mechanical models.
Supported File Formats Download
Links
Optical
Source
Model ProSource 8 (rs8)
http://ledlighting.lgin
notek.com/support/n
ewDownCenter.jsp
Cool /
Warm
IES file
Rayset
file
ASAP 1,000K rays
FRED 1,000K rays
LightTools 1,000K rays
Lucidshape 1,000K rays
OPTIS-SPEOS 1,000K rays
TracePro 1,000K rays
Zemax 1,000K rays
Please contact our sales representative if you want to receive the other type of ray
files from us.

2. Product & Technical Guidance
2.1.7 Hot Cold Factor
2.1 Optical Properties
14
The term describes the relative drop in light output due to the rise in junction
temperature. Hot/cold factor compares the light output of the LED at 85℃and 25℃
junction temperatures, which are located in the LED datasheet.
In the LED datasheets, the LEDs are measured with a single pulse, which means
that the ambient temperature is practically identical to the junction temperature,
since there is not enough time for the LED die temperature to rise in a significant
manner with a single pulse.
The LG Innotek COB LEDs have a hot/cold factor of around 0.90. That means the
LED will lose only 10% of its nominal performance when the LED is operated at an
ambient temperature of 85℃.
4W IF=400mA
Case Temperature [℃]
10W IF=260mA
13W IF=340mA
90%
94%
89%
93%
88%
94%
Case Temp. vs. Luminous Flux
Case Temperature [℃]
0.70
0.80
0.90
1.00
1.10
25 35 45 55 65 75 85 95
Relative Luminous Flux [%]
Case Temperature [℃]
7W IF= 195mA
90%
95%

0.70
0.80
0.90
1.00
1.10
25 35 45 55 65 75 85 95 105
Relative Luminous Flux
Case Temperature [℃]
2. Product & Technical Guidance
2.1.7 Hot Cold Factor
2.1 Optical Properties
15
Case Temp. vs. Luminous Flux
95%
90%
24W IF=640mA
Case Temperature[℃]
17W IF=470mA
89%
96%

2. Product & Technical Guide
2.2.1 Temperature Measurement
2.2 Thermal Properties and Simulation
16
Attach the
thermocouple here (Tc Point)
Thermo-Couple
Cu
Al Substrate
PSR
COB PKG
Junction
The anode of the LG Innotek COB PKGs performs simultaneously as the electrode
and heat conductor.
Thermal pad
Attach the
thermocouple here (Tc Point)
White
silicone
Thermo-Couple
Al Substrate
PSR
COB PKG
Junction White
silicone
Ag
4W/7W
10W/13W/17W/24W
Anode(+)
Cathode(-)
Anode(+) Cathode(-)
Since TJcannot be directly measured, TJis calculated by the following equations.
TJ= Tc+ ΔTJ-c = Tc+ ( R th J-c ×PD )
ΔTJ-c = Rth J-c X PD, where Rth J-c is a value found in the datasheet
*Rth J-c ( ℃/ W ) : Thermal Resistance, p-n Junction to Case point
*Tc ( ℃) : COB PKG Case Temperature, same as LM80 Ts monitoring point
*Δ TJ-c ( ℃) : Difference between Junction and Case Point Temperatures
during LED Operation
*PD( W ) : LED Operating Power ( If×Vf)
Tcapplied above formula is usually measured by using thermocouples mounted on
anode as given below features.
Dielectric
layer
Dielectric
layer
Cu

2.2.2 Thermal Design and Analysis (4W COB PKG)
17
A simulation is an effective procedure with regard to thermal design. Simulation results
from when the COB PKG was attached to the heat sink with TIM* are shown as below.
- Simulation S/W : Flotherm (Mentor Graphics)
- Environmental conditions(Ta) : 25℃
- Heat dispersion condition : natural convection
- Thermal Grease : 4.5W/mK
- Heatsink material : Al (thermal conductivity :180W/mK)
- Heatsink dimension : 44 (W) x 25 (H) x 40 (Lh) mm
- Fin number : 5ea
- Fin length : 20mm
- Fin thickness : 2.5mm
H
G
Junction temperature vs. Surface area of heat sink**
* TIM : Thermal Interface Material
** The surface area of heat sink is controlled with variation of Lh.
The junction temperature vs. power consumption
2.2 Thermal Properties and Simulation
2. Product & Technical Guide

2.2.2 Thermal Design and Analysis (10W COB PKG)
22
- Simulation S/W : Flotherm (Mentor Graphics)
- Environmental conditions(Ta) : 25℃
- Heat dispersion condition : natural convection
-Thermal Grease : 4.5W/mK
- Heatsink material : Al(thermal conductivity :180W/mK)
- Heatsink dimension : 63.7 (W) X 60 (H) X 60 (Lh) mm
- Fin number : 7ea
- Fin length : 55mm
- Fin thickness : 1.9mm
H
G
18
A simulation is an effective procedure with regard to thermal design. Simulation results
from when the COB LED was attached to the heat sink with TIM* are shown as below.
* TIM : Thermal Interface Material
** The surface area of heat sink is controlled with variation of Lh.
Junction temperature vs. Surface area of heat sink** The junction temperature vs. power consumption
2.2 Thermal Properties and Simulation
2. Product & Technical Guide

2.2.2 Thermal Design and Analysis (13W COB PKG)
22
- Simulation S/W : Flotherm (Mentor Graphics)
- Environmental conditions(Ta) : 25℃
- Heat dispersion condition : natural convection
-Thermal Grease : 4.5W/mK
- Heatsink material : Al(thermal conductivity :180W/mK)
- Heatsink dimension : 84.3 (W) X 60 (H) X 60 (Lh)mm
- Fin number : 9ea
- Fin length : 55mm
- Fin thickness : 1.9mm
H
G
19
A simulation is an effective procedure with regard to thermal design. Simulation results
from when the COB LED was attached to the heat sink with TIM* are shown as below.
* TIM : Thermal Interface Material
** The surface area of heat sink is controlled with variation of Lh.
Junction temperature vs. Surface area of heat sink** The junction temperature vs. power consumption
2.2 Thermal Properties and Simulation
2. Product & Technical Guide

2.2.2 Thermal Design and Analysis (17W COB PKG)
22
- Simulation S/W : Flotherm (Mentor Graphics)
- Environmental conditions(Ta) : 25℃
- Heat dispersion condition : natural convection
-Thermal Grease : 4.5W/mK
- Heatsink material : Al(thermal conductivity :180W/mK)
- Heatsink dimension : 125.5 (W) X 60 (H) X 60 (Lh)mm
- Fin number : 13ea
- Fin length : 55mm
- Fin thickness : 1.9mm
H
G
20
A simulation is an effective procedure with regard to thermal design. Simulation results
from when the COB LED was attached to the heat sink with TIM* are shown as below.
* TIM : Thermal Interface Material
** The surface area of heat sink is controlled with variation of Lh.
Junction temperature vs. Surface area of heat sink** The junction temperature vs. power consumption
2.2 Thermal Properties and Simulation
2. Product & Technical Guide