Next Generation LED packages for General Illumination

© 2018 Cree, Inc. All rights reserved. Cree®, the Cree logo, Wolfspeed®, and the Wolfspeed logo are registered trademarks of Cree, Inc.

Next Generation LED packages for General

IlluminationLED Summit-2018, LED Expo-Delhi

Senthilkumar Madasamy

Cree India Pvt. Ltd

7th December-2018

© 2018 Cree, Inc. All rights reserved. Cree®, the Cree logo, Wolfspeed®, and the Wolfspeed logo are registered trademarks of Cree, Inc.2

• Ceramic Packages

– Packages with very high reliability (excellent color maintenance)

– Higher sulfur resistance for harsh conditions

– Optically compatible packages

• Chip on Board

– Color Management using next generation Phosphor Technologies

– Higher efficacy in higher CRI

• Plastic Packages.

– Package types

– EMC vs PCT

• High Density LED packages

Agenda


Luminous efficacy improvements

We are here now LED efficacy is suturing but still

improvements are needed.

Efforts are going in to improving

LED die, phosphor and Silicone

enhance the lm/W and reliability.

High temperature Silicone

New Gen Phosphor

LED Die


Ceramic PackagesDiscrete Arrays

Price-Performance

Industry Standard

High Density

Surface Mount Arrays

Extreme High Power

Halogen Replacement

MHB-A/B

MHD-E/G

High Intensity

Extreme High Power

XHP35

XP

XM

XQ-A

XB-D

XT-E

XQ-E

XB-H

XP-L2

XQ-E

XP-L

XHP35

• High performance building

blocks

• Design flexibility

• Application optimized

performance

• Lowest system cost• Ceramic packages size vary from 1.6x1.6 to 7070

• Packages comes with flat and dome optics

• Smaller packages offer extreme optical control

• Larger packages offer higher power density and helps

lower cost fixtures


Ceramic Packages: Extreme Optical Control

Extreme Optical Control (Single Die) Moderate Optical Control (Multi die)

• Both symmetric, double symmetric, narrow

beam and wide beam street light possible

• Various symmetric beam options possible


Ceramic Packages: Extreme Optical Control

0

10000

20000

30000

40000

50000

60000

0 5 10 15 20

Inte

nsi

ty a

t 0

°(c

d)

Power (W)

XP-L High Intensity Lumileds LUXEON MZ

0

5,000

10,000

15,000

20,000

25,000

30,000

-30 -20 -10 0 10 20 30

Inte

nsi

ty (c

d)

Viewing Angle (°)

XP-L High Intensity Lumileds LUXEON MZ XP-L High Density


Ceramic Packages: LM-80 @ extreme temperature

Works well at extreme temperature @ 120 deg C

Higher operating temperature will lower the

cooling/heat sink cost.

Enables compact fixtures

LM-80@ 120 C

XPG3

XHP35

XHP50

XHP70


Ceramic Packages: Color Maintenance

Most of the single power Ceramic LEDs deliver better

color maintenance. Negligible color shifts even after

16,000 hours LM-80 test.

Ceramic packages are the only way to offer 5-7 year

warranty on products

ANSI limit


Ceramic Packages: Higher Sulfur resistance

Harsh climatic conditions demands better sulfur resistance


Chip on Board


Chip On Board packagesIntegrated Arrays/ COBs

High Density

Standard Density

High Current

CMA1516

CMA1825

CMA1840

CMA2550

CMA3090

CXA13/CXB13

CXA15/CXB15

CXA18/CXB18

• COBs comes in Metal & Ceramic Substrates.

• Metal Substrate offers higher current carrying capability and

offers ease of mounting

• Ceramic enables smaller optical source

• Ceramic offers higher lumen & Color maintenance than metal

counterpart

CXA13/CXB13

CXA15/CXB15

CXA1850

CXA2590

CXA25/CXB25

CXA30/CXB30

CXA35/CXB35


COBs for high end retail and hospitality lighting

Halogen LikeCMH Like

Very good Color fidelity (Rf)

No Color Saturation

Moderate Color fidelity

Higher Color Saturation ( Higher Color Gamut)

How does one meet these two challenging requirements???


COB: Color Management

Spectrum Engineering using Multi-Phosphor systems

0.00

0.20

0.40

0.60

0.80

1.00

1.20

400 500 600 700 800

90CRI

Multi-Phosphor Systems Can achieve higher color fidelity

to mimic Halogen

Can achieve higher color

saturation to mimic CMH lamps


COBs for high end retail and hospitality lighting

Halogen LikeCMH Like

Very good Color fidelity (Rf)

No Color Saturation

Color points on BBL

Moderate Color fidelity

Higher Color Saturation

Color points on below BBL


E-Tone COB


E-Tone COB


E-Tone COB

New Phosphor system allows higher lm/w in higher CCT


Plastic Packages


Plastic Packages & Market Segmentation

>4 W

1 W

0.5 W

0.2 W

20 lm 40 lm 80 lm 200 lm 400 lm 800 lm

5050

2835 & 3030

2835

5630 & 30302016

Office Industry Retail Residential Hospitality Architectural Automotive Outdoor

2016

5630

2835

3030

5050


Plastic PackagesJ Series Market Segmentation

20

70

120

170

220

120 140 160 180 200 220

Flu

x E

mitte

r (l

m)

Efficacy (lm/W)

≈

600

Entry-level T Lamp, MR,

Track, Under Cabinet

3030 6V

5050 6V/9V/12V/24V/36V 5050 6V/9V/12V/24V/36V

3030 6V

2016 3V *AS

2835 3V Value

2835 3V Value

3030 3V

5630 3V2835 3V STD

2835 3V HE

5630 3V HE

5630 3V HE

Class K

3030 6V

2835 6V

5630 3V

2835 9V

2835 18V

2835 3V STD

Retrofit,

Downlights, Task,

Ceiling, Candle,

Sconce,

Commercial Track

Directional lamps,

PAR, Commercial

Downlights

Entry-level Street

Lights, High

Bay/Low Bay,

Floods, Bollards,

Wall Packs,

Landscaped/Step

Lighting

Performance LED Troffer, Linear, Low

Bay

Mid-level LED Troffer, Linear

*Bubbles = LED performance

*Linear = strips, wraps, surface mount, cove

*AS = Application Specific

*80 CRI, 4000 K, 25 °C

J Series™ products are marketed by Cree, Inc. for the benefit of Cree Venture LED Company Limited


Performance

Group

ULTIMATE

L90 focused LM-80

Class 3A ESD Rating

Excellent Sulfur Resistance

Most Robust

HIGH-EFFICACY

(HE)

L70/L90 focused LM-80

Class 2 ESD Rating

Good Sulfur Resistance

Best LPW

L70/L90 focused LM-80

Class 2 ESD Rating


Best lm/$

STANDARD

L70 focused LM-80

Class 2 ESD Rating


Great Value

VALUE

Performance

ClassA B C D E G H J K L N P Q R S U V W X Y

Incre

asin

g P

erf

orm

an

ce

Increasing Performance

Plastic Packages J Series Performance Group & Class

J Series™ products are marketed by Cree, Inc. for the benefit of Cree Venture LED Company Limited


Reliability comparison of Ceramic & Plastic packages

Plastic/ Epoxy/EMC packages shows good color

maintenance up to 6000 hours (with in LM-80 test

duration and after that they start to degrade and shift

color after 10,000 hours

Most of the single power Ceramic LEDs deliver better

color maintenance. Negligible color shifts even after

16,000 hours LM-80 test

ANSI limit ANSI limit

High Power Ceramic LEDsHigh Power Plastic/ Epoxy/ EMC LEDs

Need to be careful with color shift


Some of the high power plastic/ epoxy

packages shows color shift even before

9000 hours. It will be a dangerous color

shift after 12,000 hours knowing how

plastic packages shift color

EESL limit /Energy Star limit

Need to be careful with color shift

EESL limit /Energy Star limit

Poor Color Maintenance of high Power Epoxy packages (Acutal data from LM-80 report)

Plastic/epoxy 5050 package

Reliability comparison of Ceramic & Plastic packages


High Density Packages


High Density packages

3535-6W package

320lm @700mA @Tj=85C

Max. Current is 2A

1616-6W package

300lm@700mA, Tj=85C

Max Current is 2A

Can help you to make your own light source


Making your own source for lumen and tunability

Tunable 19mm LES board

CCT TEC°C Lm LPW

2814K 85 2504 123

CCT TEC°C Lm LPW

5298K 85 2503 149

Cool String

Warm String

22mm LES – 95 XD16 25mm Linear Array

350 mA per LED

4,300 lm @ 158 LPW

260 mA per LED

11,100 lm @ 165 LPW

4 times more lumen density than COBs


• Ceramic LED packages have transformed over the years offering higher lumen

output & Reliability (in terms of higher operating temperature and excellent color

maintenance).

• COB packages now have the ability to offer optimized color quality for specific

applications

• Plastic packages improved in quality and performance, but one should know the

color maintenance of these packages if it were to be used in outdoor.

• High density packages helps to create your own light source to make high

performance and aesthetically pleasing luminaires

Conclusions


Documents

Next Generation LED packages for General Illumination