CUSTOMER : . DATE : JAN 10. 2013. REV : REV. 0.0datasheet.octopart.com/LEMWM11380JZ10A0-LG-Innotek-datasheet... · CUSTOMER : . DATE : JAN 10. 2013. ... 1.1 Product Overview 1.1.1

Application Note

COB LED Series

(4W, 10W, 13W, 17W)

RoHSCompliant

CUSTOMER : .

DATE : JAN 10. 2013.

REV : REV. 0.0 .

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 Product Application

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

Page

4

4

5

6

7

9

11

11

12

12

13

14

15

16

20

21

CONTENTS

3


2.3.3 Connector using guide

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 Characteristics

4. Reliability

4.1 LM-80 Test Results

4.1.1 IES LM-80-2008 Test Results

5. Certification & Safety

5.1 Certification & Safety

6. Additional Information & Caution

6.1 Risk of Sulfurization

6.2 Quality Issue of LED during Operation

7. Revision History

Page

22

24

25

26

28

29

30

32

33

1.1.1 Product Description

( Unit : mm )1.1.2. Outline Dimensions

• Lighting Color : White

• 4W COB LED : 14 x 14 x 1.00 mm (L x W x H)

• 10W, 13W, 17W COB LED : 18 x 24 x 0.85 mm (L x W x H)

• Top-side solder connection

1. Introduction

Top View Side View


4

Circuit diagram

4W

10W/13W/17W

10W

13W

17W

4W

Tc Measurement point

Tc Measurement point

• High efficiency & brightness

• Long lifetime and high reliability

• Economical & eco-friendly

• Simplifies the manufacturing process

• Platform dimension at 10W, 13W and 17W

(easy to design the lens, connector and so on)

• Connector Solution Service

1. Introduction


1.1.3 Product Benefits and Features

4W 10W

Cool Warm Cool Warm

118 lm/W@400mA

(5000K)

113 lm/W@400mA

(3000K)

@260mA

(5000K)

101 lm/W@260mA

(3000K)

5

13W 17W

Cool Warm Cool Warm

@340mA

(5000K)

104lm/w@340mA

(3000K)

@470mA

(5000K)

102lm/W@470mA

(3000K)

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

Ambient Light

& Troffer

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…

6) To avoid condensation, the products must not be stored at the place where the

temperature and the humidity can controlled as mentioned previous page.

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%RHwithin 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


2.1.1 Chromaticity Bins


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 4 micro bins.

Rank CIE X CIE Y Rank CIE X CIE Y Rank CIE X CIE Y Rank CIE X CIE Y

I1

0.3548 0.3736

H1

0.3376 0.3616

G1

0.3207 0.3462

F1

0.3028 0.3304

0.3642 0.3805 0.3464 0.3688 0.3292 0.3539 0.3117 0.3393

0.3617 0.3663 0.3452 0.3558 0.3293 0.3423 0.3131 0.3290

0.3530 0.3601 0.3371 0.3493 0.3215 0.3353 0.3048 0.3209

I2

0.3530 0.3601

H2

0.3371 0.3493

G2

0.3215 0.3353

F2

0.3048 0.3209

0.3617 0.3663 0.3452 0.3558 0.3293 0.3423 0.3131 0.3290

0.3591 0.3522 0.3441 0.3428 0.3294 0.3306 0.3145 0.3187

0.3512 0.3465 0.3366 0.3369 0.3222 0.3243 0.3068 0.3113

I3

0.3642 0.3805

H3

0.3464 0.3688

G3

0.3292 0.3539

F3

0.3117 0.3393

0.3736 0.3874 0.3551 0.3760 0.3376 0.3616 0.3205 0.3481

0.3703 0.3726 0.3533 0.3624 0.3371 0.3493 0.3213 0.3371

0.3617 0.3663 0.3452 0.3558 0.3293 0.3423 0.3131 0.3290

I4

0.3617 0.3663

H4

0.3452 0.3558

G4

0.3293 0.3423

F4

0.3131 0.3290

0.3703 0.3726 0.3533 0.3624 0.3371 0.3493 0.3213 0.3371

0.3670 0.3578 0.3515 0.3487 0.3366 0.3369 0.3221 0.3261

0.3591 0.3522 0.3441 0.3428 0.3294 0.3306 0.3145 0.3187

CIE X

CIE

Y



10

CIE

Y

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 4 micro bins.

- 3SDCM optional.

0.34

0.35

0.36

0.37

0.38

0.39

0.40

0.41

0.42

0.43

0.44

0.35 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 0.50

ANSI

C78.377A2700K

3SDCM3000K

3SDCM3500K

3SDCM

4000K

3SDCM

Rank CIE X CIE Y Rank CIE X CIE Y Rank CIE X CIE Y Rank CIE X CIE Y

M1

0.4562 0.4260

L1

0.4299 0.4165

K1

0.3996 0.4015

J1

0.3736 0.3874

0.4687 0.4289 0.4430 0.4212 0.4146 0.4089 0.3870 0.3958

0.4586 0.4103 0.4344 0.4032 0.4082 0.3922 0.3819 0.3776

0.4465 0.4071 0.4221 0.3984 0.3941 0.3848 0.3697 0.3697

M2

0.4465 0.4071

L2

0.4221 0.3984

K2

0.3941 0.3848

J2

0.3697 0.3697

0.4586 0.4103 0.4344 0.4032 0.4082 0.3922 0.3819 0.3776

0.4483 0.3918 0.4260 0.3853 0.4017 0.3752 0.3783 0.3646

0.4373 0.3893 0.4147 0.3814 0.3889 0.3690 0.3670 0.3578

M3

0.4687 0.4289

L3

0.4430 0.4212

K3

0.4146 0.4089

J3

0.3870 0.3958

0.4813 0.4319 0.4562 0.4260 0.4299 0.4165 0.4006 0.4044

0.4700 0.4126 0.4465 0.4071 0.4221 0.3984 0.3941 0.3848

0.4586 0.4103 0.4344 0.4032 0.4082 0.3922 0.3819 0.3776

M4

0.4586 0.4103

L4

0.4344 0.4032

K4

0.4082 0.3922

J4

0.3819 0.3776

0.4700 0.4126 0.4465 0.4071 0.4221 0.3984 0.3941 0.3848

0.4593 0.3944 0.4373 0.3893 0.4147 0.3814 0.3898 0.3716

0.4483 0.3918 0.4260 0.3853 0.4017 0.3752 0.3783 0.3646

X3

(3SDCM)

0.4656 0.4174

X3

(3SDCM)

0.4413 0.4107

X3

(3SDCM)

0.4148 0.4000

X3

(3SDCM)

0.3881 0.3879

0.4573 0.4154 0.4325 0.4075 0.4047 0.3950 0.3791 0.3823

0.4510 0.4032 0.4274 0.3958 0.4012 0.3841 0.3769 0.3724

0.4583 0.4049 0.4350 0.3984 0.4098 0.3883 0.3845 0.3770

CIE X


2.1.2 Spectral Power Distribution

2.1.3 CRI Information


Ra and R Values

0

20

40

60

80

100

120

380 430 480 530 580 630 680 730 780

Rela

tive S

pect

ral Pow

er

Dis

trib

ution(%

)

Wavelength (nm)

Warm

Neutral

Cool

11

* Neutral : 4000K & 4500K


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


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


2.1.6 Ray File Set


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.

Supported Files Download link

Optical

Source

Model

ProSource 8

http://ledlighting.lginnotek.com/pro

ducts/ledPkgView.jsp?cateNo=3Cool /

Warm

IES file

Ray file

ASAP500K rays /

1000K rays

FRED500K rays /

1000K rays

LightTools500K rays /

1000K rays

Lucidshape500K rays /

1000K rays

OPTIS-

SPEOS

500K rays /

1000K rays

TracePro500K rays /

1000K rays

Zemax500K rays /

1000K rays

http://ledlighting.lginnotek.com/products/ledPkgView.jsp?cateNo=3

http://ledlighting.lginnotek.com/products/ledPkgView.jsp?cateNo=3


2.1.7 Hot Cold Factor


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 0.89. That means the

LED will lose only 11% of its nominal performance when the LED is operated at an

ambient temperature of 85℃.

4W IF =400mA

Case Temperature [℃] Case Temperature[℃]

10W IF =260mA

17W IF =470mA13W IF =340mA

90%

94%

89%

96%

89%

93%

88%

94%

Case Temp. vs. Luminous Flux


2.2.1 Thermal Design Guide (Thermal Resistance)


15

The thermal resistance is calculated by the following equations.

TJ = TC + Δ TJ-C = TC + ( R th J-C × PD )

Δ TJ-S = Rth J-S X PD, where Rth J-S is a value found in the COB LEDs

datasheet

*Rth J-C ( ℃ / W ) : Thermal resistance, p-n junction to solder point

*Tc( ℃ ) : Case temperature, the same as LM-80 TC monitoring point

*Δ TJ-C ( ℃ ) : Difference between Junction and solder point temperatures

during LED Operation

*PD ( W ) : LED operating Power ( If × Vf )

Since Tj cannot be directly measured, Tj can be calculated with above equations

combined with the solder point temperature and LED power consumption

measurements. Attach the

thermocouple here (Tc Point)

Thermo-Couple

Au

Al Substrate

PSR

COB LED PKG

Junction

The anode of the LG Innotek COB LEDs performs simultaneously as the electrode

and heat conductor.

Thermal pad

Attach the

thermocouple here (Tc Point)

White

silicone

Thermo-Couple

Cu

Al Substrate

PSR

COB LED PKG

Junction

White

siliconeAg

4W

10W/13W/17W

Anode(+) Cathode(-)

Anode(+) Cathode(-)


2.2.2 Thermal Design Guide (4W simulation)


16

A simulation is an effective procedure with regard to be thermal design. Simulation

results from when the COB LED was connected to the heat sink with a heat conductive

sheet are shown as below.

- Simulation S/W : Flotherm (Mentor Graphics)

- Environmental conditions(Ta) : 25℃

- Heat dispersion condition : natural convention

-Thermal Grease : 3.8W/mK

- Heatsink material : Al (thermal conductive:180W/mK)

- Heatsink dimension : 44 (W) x 25 (H) x 40 (Lh) mm

- Fin number : 5ea

- Fin length : 20mm

- Fin thickness : 2.5mm

*This graph indicates the Junction Temperature

according to variation of Lh length.

H

G




22








- Heatsink material : Al(thermal conductive:180W/mK)

- Heatsink dimension : 63.7 (W) X 60 (H) X 60 (Lh) mm

- Fin number : 7ea

- Fin length : 55mm




H

G

17




22









- Heatsink dimension : 84.3 (W) X 60 (H) X 60 (Lh)mm

- Fin number : 9ea

- Fin length : 55mm




H

G

18




22









- Heatsink dimension : 125.5 (W) X 60 (H) X 60 (Lh)mm

- Fin number : 13ea

- Fin length : 55mm




H

G

19


2.3.1 Handling Guide


20

Manual Handling

1) Use Teflon-type tweezers to grab the base of LED and do not touch the optical surface.

2) Avoid putting mechanical stress on the optical surface.

3) Never touch the optical surface with fingers or sharp object. The LED surface

could be soiled or damaged, which affect the optical performance of the LED.

4) Do not stack assemblies containing COB LED so that anything rests on the LED

optical surface. Force applied to the optical surface may result in the optical surface

being damaged.

5) Please avoid touching electrodes while handling packages.

6) If debris contacts the resin, gently remove it using the tip of a cotton swab soaked

in isopropyl alcohol.



21

Manual Soldering

COB LED are design for wire-attach soldering. We recommend the use of a

temperature controlled soldering iron with solder tip.

LG Innotek recommends that COB LED not be exposed to temperatures higher than

350℃ for less within 3.5 seconds.

After soldering, allow COB LED to return to room temperature before subsequent

handling. Premature handling of the device, especially around the optical surface,

could result in damage to the LED.

If PCB cleaning is necessary, LG Innotek recommends the use of isopropyl alcohol

(IPA). Ultrasonic cleaning is prohibited.

Wire orientation

OK NG

*If the naked wire attached at the side of PCB, it happens short circuit.

So we recommend the length of naked wire is shorter rather than 0.8mm

Length≤0.8mm

Naked wire

2.3.2 Soldering Guide


Main benefits in the uses of connectors with COB LED

1) The holder push-in terminals allow for a solder-free connection to the COB LED

contacts.

2) The use of the holder avoids the screw mounting of the COB LED onto the heat sink.

Connector Assembly guide

1) The COB LED is pushed into the holder

and kept in place by two plastic pins.

2) This is still an open issue that

needs to be deepened together.

3) Push in terminals.

22


2.3.3 Connector Guide

CompanyNation

(manager)Progress Web-site Link

COB

BJB

www.BJB.comGermany T.B.D T.B.D

Idealindustry

www.idealindustries.com

/products/oem

USA T.B.D T.B.D

Molex

www.molex.comUSA T.B.D T.B.D

AA.STUCCHI

www.aagstucchi.it Italy T.B.D T.B.D


LG Innotek provides the linked websites to access the connector solution of

partners that can assist getting optimize designs as below.

BJB Molex

23

AA. STUCCI


2.3.3 Connector Guide

http://www.molex.com/


2.4 Nomenclature Code

2.4.1 LED Part Number Nomenclature

24

1 3 4 6 7 8 102 95 11 12

Optical Bin(Flux)

Optical Bin (CRI)

75 = 75 CRI Min.

80 = 80 CRI Min.

CIE Bin

Special Code

Z = Zener Chip

CIE Bin Code

13 14 15 16

0 = 4 Bins

1 = 9 Bins

2 = 16 Bins

Flux Bin Code

Label Code

RR = Red

BB = Blue

MW = Gen1 Multi Mixing White

HW = Gen2 Multi Mixing White

MC = Multi Color

Type

LE = Light Emitting Diode

Color

PKG TypeS = SMD Type

M = Module Type

A = Ceramic Type

H = High Power SMD Type

PKG Dimension

A = NEDA

Revision

All LEDs are tested and sorted by color, luminous flux and forward voltage where every

LED in a reel has only a single color bin, luminous flux bin and forward voltage bin.

However, the forward voltage bin information is not captured in the part number

nomenclature.

A 16-digit part number is required when orders are placed. LG Innotek leverages the fol

lowing part number nomenclature.

0 = Full Bins

1 = 15% Micro-Bin

3. 2nd Optic Design

3.1.1 Availability

3.1 2nd Optic Design Guide

Company /

Home PageNation Progress Web-site Link

COB

(MCP)

KHATOD Optoelectronics

www.khatod.comItaly

Applicable :

4 Type LensKHATOD_4W_COB PKG

BICOM

http://www.bicomoptics.com/China

Applicable :

4 Type 4ea LensBICOM_COB

LedLink

www.ledlink-optics.comTaiwan

Applicable :

8 Type LensLEDLINK_COB

Polymer-optics Ltd.,

www.polymer-optics.co.ukUK T.B.D T.B.D

LG Innotek provides the linked websites to access the applicable lens solution of

partners that can assist getting optimize designs as below.

More applicable solutions will be updated continuously.

25

[LedLink 2nd Lens]

[KHATOD 2nd Lens] [BICOM 2nd Lens]

3. 2nd Optic Design

3.1.2 2nd Optic Characteristics


LED Model Lens Light Spot Intensity Distribution Parameter

4W COB

(Warm)

Diameter : Φ45mm

Height : 35.1mm

Material : PC

Transmittance : 89%

4W COB

(Warm)

Diameter : Φ45mm

Height : 35.1mm

Material : PC

Transmittance : 89%

4W COB

(Warm)

Diameter : Φ45mm

Height : 35.1mm

Material : PC

Transmittance : 89%

4W COB

(Warm)

Diameter : Φ45mm

Height : 35.1mm

Material : PC

Transmittance : 89%

4W COB

(Cool)

Diameter : Φ45mm

Height : 35.1mm

Material : PC

Transmittance : 89%

4W COB

(Cool)

Diameter : Φ45mm

Height : 35.1mm

Material : PC

Transmittance : 89%

4W COB

(Cool)

Diameter : Φ45mm

Height : 35.1mm

Material : PC

Transmittance : 89%

Designed by BICOM

26

12.4deg

17.7deg

31.6deg

34.2deg

13.0deg

19.0deg

32.7deg

3. 2nd Optic Design

3.1.2 2nd Optic Characteristics (Continued)


LED Model Lens Light Spot Intensity Distribution Parameter

10W COB

(Warm)

Diameter : Φ45mm

Height : 20mm

Material : PC

Transmittance : 89%

10W COB

(Warm)

Diameter : Φ45mm

Height : 20mm

Material : PC

Transmittance : 89%

10W COB

(Warm)

Diameter : Φ45mm

Height : 20mm

Material : PC

Transmittance : 89%

Designed by BICOM

27

28.5deg

43.2deg

55.1deg

4. Reliability

4.1.1 IES LM-80-2008 Testing Results

4.1 LM-80 Testing Results

28

The summary of the COB LEDs LM-80 test results is provided in this document.

Model

Case

Temp.

[Tc]

Test

Current

[If]

Average Flux

Maintenance

at 3,000hr

Average

Chromaticity

Shift (Δu’v’)

at 3,000hr

Due date

at

6,000hr

10W

55℃

260mA

99.1% 0.0007

Apr. 13.201385℃ 99.4% 0.0008

95℃ 99.1% 0.0009

13W

55℃

340mA

99.3% 0.0005

Apr. 13.201385℃ 99.5% 0.0006

95℃ 99.4% 0.0007

Model

Case

Temp.

[Tc]

Test

Current

[If]

Average Flux

Maintenance

at 6,000hr

Average

Chromaticity

Shift (Δu’v’) at

6,000hr

Due date

at

6,000h

4W

25℃

400mA

99.1% 0.0023 >36000hr

75℃ 97.1% 0.0021 >36000hr

85℃ 96.0% 0.0019 35000hr

Model

Case

Temp.

[Tc]

Test

Current

[If]

Average Flux

Maintenance

at 1,000hr

Average

Chromaticity

Shift (Δu’v’)

at 1,000hr

Due date

at

6,000hr

17W

55℃

470mA

99.7% 0.0002

Jun 15, 201385℃ 99.8% 0.0003

95℃ 99.8% 0.0004

5. Certification & Safety

5.1 Certification & Safety

29

COB LED CertificationTesting

DataDrive

CurrentResult

4W

UL/UR OCT 18, 2012 Max. Current -

SGS NOV 20, 2011 - -

IEC 62471 In progress - Risk 1

10W/

13W/

17W

UL/UR OCT 18, 2012 Max. Current -

SGS NOV 20, 2012 - -

IEC 62471 In progress - Risk 1

*Max current for testing UL is shown in each specification sheet.

http://ledlighting.lginnotek.com/support/downCenter.jsp?cate=Brochure

The files can be downloaded directly from the LG Innotek web site.

http://ledlighting.lginnotek.com/support/downCenter.jsp?cate=Brochure&type=&search=&p



- Discoloration by the Gases (Sulfur, Chlorine or other halogen compounds)

- The Root Cause : Silver may turn black (or tarnish) when exposed to gases

- Reaction Mechanism : 2Ag + S → Ag2S (Black)

Bottom Ag Encapsulant

Image

EDS

Results of Analysis at SEM & EDS

30

SiliconCarbon

Oxygen

Hydrogen

Gas

Gas

Gas



Case 1. Discoloration by sulfur gases (PKG)

Case 2. sulfurization by environment

Detected with

sulfur element

The surrounding environment needs to be inspected before the aging test since the

environment may contain sulfur under the normal condition.

Discoloration

31

PCB surfacecondition


6.2 Quality Issue of LED in Operation

OK NG

Solder Area NG PKG

NG

Image

◎ Carbonization of surface from Excessive Solder Flux

32

: flux

COB LED PKG

1) When the flux component generated during the soldering process is exposed

at the LED surface, discoloration of the lens may occur.

2) Sn element is detected on all abnormal COB LED, which is the cause of the

carbonization defect.

3) If foreign substance is detected, clean COB LED with IPA.

7. Revision History

Revision Date Contents of Revision Remark

Rev. 0.0 ’13.01.10 New Establishment

33

Documents

CUSTOMER : . DATE : JAN 10. 2013. REV : REV. 0.0datasheet.octopart.com/LEMWM11380JZ10A0-LG-Innotek-datasheet... · CUSTOMER : . DATE : JAN 10. 2013. ... 1.1 Product Overview 1.1.1