www.osram.com/prevaled-core
Application guide.
PrevaLED® Core light engines.
OCTOBER
2011
CONTENTS
Please note:
All information in this guide has been prepared with great care.
OSRAM, however, does not accept liability for possible errors,
changes and/or omissions.
Please check www.osram.com/prevaled-core or contact your sales
partner for an updated copy of this guide.
2
CONTENTS
1. Introduction 4
1.1. System overview 4
1.2. System information 7
1.2.1. Nomenclature and marking 7
1.2.2. Technical data 8
1.2.3. System combinations 10
1.2.4. Accessories 12
2. Optical considerations 14
2.1. Refl ector 16
2.1.1. Refl ector design 17
2.1.2. Refl ector mounting HD version 18
2.1.3. Refl ector mounting ECO Z2 version 18
2.2. Light color stability 19
3. Electrical considerations 20
3.1. Safety requirements 20
3.2. Wiring information 20
3.3. Wiring in class I and class II luminaires 22
3.4. Optional cable clamp 22
3.5. ESD protection of light engines 23
3.6. Ingress protection 23
5. Mechanical considerations 34
5.1. Light engine dimensions 34
5.2. ECG dimensions 36
5.3. Light engine mounting 37
6. Fixation in a luminaire (example) 38
6.1. Preparation 39
6.2. Wiring and refl ector/cover 40
®
6.3. Commissioning PrevaLED
41
7. Norms and standards 42
7.1. Standards for PrevaLED
®
42
7.2. Power supply standards and
features applicable to PrevaLED® 43
7.3. Interchangeability of LED light engines 44
7.4. Photobiological safety 44
4. Thermal considerations 24
4.1. Thermal interface material and
other accessories 24
4.2. Heat sink size 25
4.3. T
measurement 30
c
4.4. Thermal simulation 32
4.5. ECG thermal considerations 33
3
INTRODUCTION
1. Introduction
1.1. System overview
Brightness levels of today’s LEDs are opening the door for
usage of LEDs in general lighting applications requiring high
lumen output levels. Building an LED-based luminaire poses
a new set of technical challenges, among them new optical
requirements, providing adequate thermal management for
stable operation and lastly dealing with the ever-improving
performance of LEDs.
OSRAM’s PrevaLED
®
family of LED light engines addresses
the challenges of LED-based lighting while at the same time
providing great performance and fl exibility to the user.
The PrevaLED
®
Core series of light engines is ideally suited
for use in refl ector-based, rotational symmetrical applications
such as downlights or spotlights. These light engines provide
several convincing benefi ts in the application:
• PrevaLED
®
Core light engines are available as a system
of matching light engines and ECGs and deliver maximum
performance at very high levels of effi ciency.
• The light engines provide superior optical performance,
both in optical effi ciency as well as high quality of light
(color rendering).
• The wide range of lumen packages (currently available
from 800–3000 lm) allows addressing a wide range of
applications based on a single platform of light engines,
all delivering the same quality of light and performance.
It is, for example, possible to create a range of spotlights,
ranging from halogen-class up to HID levels, all with the
same optical characteristics, delivering a consistent expe-
rience for the end user.
• Thanks to high thermal and optical performance, luminaires
based on PrevaLED
®
Core light engines can be realized
with minimized size of required heat sink and refl ector,
giving a greater design fl exibility to the user.
• PrevaLED
®
Core light engines provide stable interfaces for
the user, in particular by defi ning stable lumen packages
over time. Independent of future increases in LED effi cacy,
the lumen output of a given type of light engine will remain
constant, but at lower power consumption. In this way, a
luminaire designed on the PrevaLED
®
Core platform will
automatically benefi t from effi cacy improvements without
needing a lengthy and costly redesign of the base con-
struction.
4
INTRODUCTION
Movable 3D PrevaLED Core ECO Z2 (works with Adobe Acrobat 7 or higher)
PrevaLED® Core light engines are available in different perfor-
mance grades, namely lumen output and color rendering. At
present, the available systems are:
• Lumen packages of 800–3000 lm are available with a high-
quality color rendering (HD light engines – see nomencla-
ture – with CRI > 90/85). Due to internal construction with
a high-dynamic optical control of color point, these light
engines provide exceptional stability of color temperature
and module-to-module consistency.
• For basic applications, the lumen packages of 800–
3000 lm are also available in CRI 80. These light engines
employ a modifi ed housing construction leading to a better
effi cacy of the light engine.
The PrevaLED® system consists of an LED light
engine, dedicated OTp and connecting cable.
Besides providing superior quality of light, the HD-type light
engines also outperform typical modules based on single-
phosphor white LEDs. The effi cacy of the light engines not
only results in minimized energy consumption of the lumi-
naire, but also reduces the thermal load on the luminaire,
allowing for smaller and lighter designs of the heat sink.
All HD types are available in 3000 K and 4000 K CCT. The
CRI 80 (Z2) types are available in fl ux packages of 800 lm,
1500 lm, 2000 lm and 3000 lm in color temperatures of
2700 K, 3000 K, 3500 K and 4000 K.
PrevaLED
OPTOTRONIC
®
Core light engines must be operated with
®
power supplies of the “OTp” type. Available
types and valid system confi gurations are detailed in the next
section.
Additional details on optical, thermal, mechanical and electri-
cal characteristics can be found in the following sections.
Additional and updated information (as well as updates of
this guide) will be posted at
www.osram.com/prevaled-core.
OSRAM also provides an extensive range of energy-saving
light management components, such as sensors and room
controllers. By use of these products, additional energy
savings can be realized. For an overview of these products,
please visit
www.osram.com/lms.
5
INTRODUCTION
PrevaLED® Core HD: Four lumen stacks
3000 K
4000 K
PrevaLED
800 m 1500 lm 2100 lm 3000 lm
800 lm 1500 lm 2100 lm 3000 lm
LEP-800-930-HD-C LEP-1500-930-HD-C LEP-2100-930-HD-C LEP-3000-930-HD-C
LEP-800-840-HD-C LEP-1500-840-HD-C LEP-2100-840-HD-C LEP-3000-840-HD-C
®
Core ECO Z2: Four lumen stacks
800 lm 1500 lm 2000 lm 3000 lm
2700 K
3000 K
3500 K
4000 K
6
800 lm 1500 lm 2000 lm 3000 lm
LEP-800-827-C-Z2 LEP-1500-827-C-Z2 LEP-2000-827-C-Z2 LEP-3000-827-C-Z2
LEP-800-830-C-Z2 LEP-1500-830-C-Z2 LEP-2000-830-C-Z2 LEP-3000-830-C-Z2
LEP-800-835-C-Z2 LEP-1500-835-C-Z2 LEP-2000-835-C-Z2 LEP-3000-835-C-Z2
LEP-800-840-C-Z2 LEP-1500-840-C-Z2 LEP-2000-840-C-Z2 LEP-3000-840-C-Z2
Further lm stacks of 4000 lm and 5000 lm will be available in 2012.
1.2. System information
1.2.1. Nomenclature and marking
The PrevaLED® family follows a consistent naming conven-
tion for identifying key parameters of the light engine and
the power supply. The nomenclature of light engines and
OPTOTRONIC
®
ECGs is as follows:
INTRODUCTION
Light engine:
LEP-3000-930-HD-C-Z2
Power supply:
LEP = Light engine PrevaLED
®
3000 = 3000 lm
930 = CRI + CCT = CRI > 90 + 3000 K
HD = High Dynamic*
C = Core, round shape
Z2 = Product generation Z2 (if applicable)
OTp: OPTOTRONIC® PrevaLED
®
Control protocol: DALI (if applicable)
Wattage: 45 W
OTp DALI 45/220-240/700 HD FAN
* If HD is not noted, the light engine is an ECO type.
Input voltage range: 220–240 V
Maximum output current: 700 mA
HD = High Dynamic*
FAN = connector/auxiliary output
7
INTRODUCTION
1.2.2. Technical data
All values regarding system effi ciency and system power
consumption include the complete system and are based on
T
maximum:
c
Light engine
(at T
max)
c
Power supply
+
(at Tc max)
All values regarding light engine effi ciency and light engine
power are based on T
Technical data product family PrevaLED
Light engine System/
maximum.
c
light engine
®
Core
Luminous
fl ux
System/
light engine
[lm]
Power
[W]
Effi cacy
[lm/W]
PrevaLED® Core HD
LEP-3000-930-HD-C
LEP-3000-840-HD-C
LEP-2100-930-HD-C
LEP-2100-840-HD-C
43/39 3,000 70/77 3,000 > 90 >130 < 3 50,000 60
43/39 3,000 70/77 4,000 > 85 >130 < 3 50,000 65
28/25 2,100 75/84 3,000 > 90 >130 < 3 50,000 65
28/25 2,100 75/84 4,000 > 85 >130 < 3 50,000 65
CCT
[K]
CRI Viewing
angle
[°]
Initial
SDCM
PrevaLED® Core HD
Lifetime
L70/B50
at T
max.
c
[h]
max
T
c
[°C]
LEP-1500-930-HD-C
LEP-1500-840-HD-C
16/19 1,500 75/84 3,000 > 90 >130 < 3 50,000 65
16/19 1,500 75/84 4,000 > 85 >130 < 3 50,000 65
LEP-800-930-HD-C 11/9 800 75/88 3,000 > 90 >130 < 3 50,000 65
LEP-800-840-HD-C 11/9 800 75/88 4,000 > 85 >130 < 3 50,000 65
8
INTRODUCTION
PrevaLED® Core ECO Z2
Light engine System/
light engine
Power
[W]
PrevaLED
®
Core ECO Z2
Luminous
fl ux
[lm]
System/
light engine
Effi cacy
[lm/W]
CCT
[K]
CRI Viewing
angle
[°]
Initial
SDCM
Lifetime
L70/B50
at T
max.
c
[h]
max
T
c
[°C]
LEP-3000-827-C-Z2 36/31 3,000 84/97 2,700 80 >120 < 4 50,000 65
LEP-3000-830-C-Z2 33/29 3,000 90/104 3,000 80 >120 < 4 50,000 65
LEP-3000-835-C-Z2 32/29 3,000 93/107 3,500 80 >120 < 4 50,000 65
LEP-3000-840-C-Z2 32/28 3,000 94/108 4,000 80 >120 < 4 50,000 65
LEP-2000-827-C-Z2 32/28 2,000 62/72 2,700 80 >120 < 4 50,000 65
LEP-2000-830-C-Z2 29/25 2,000 68/79 3,000 80 >120 < 4 50,000 65
LEP-2000-835-C-Z2 29/25 2,000 70/81 3,500 80 >120 < 4 50,000 65
LEP-2000-840-C-Z2 28/24 2,000 71/82 4,000 80 >120 < 4 50,000 65
LEP-1500-827-C-Z2 22/19 1,500 67/80 2,700 80 >120 < 4 50,000 65
LEP-1500-830-C-Z2 21/17 1,500 73/87 3,000 80 >120 < 4 50,000 65
LEP-1500-835-C-Z2 20/17 1,500 74/89 3,500 80 >120 < 4 50,000 65
LEP-1500-840-C-Z2 20/17 1,500 75/90 4,000 80 >120 < 4 50,000 65
LEP-800-827-C-Z2 12/10 800 65/79 2,700 80 >120 < 4 50,000 65
LEP-800-830-C-Z2 12/10 800 65/79 3,000 80 >120 < 4 50,000 65
LEP-800-835-C-Z2 12/10 800 65/79 3,500 80 >120 < 4 50,000 65
LEP-800-840-C-Z2 12/10 800 69/84 4,000 80 >120 < 4 50,000 65
9
INTRODUCTION
Technical data ECG
ECG Nominal
power
[W]
Con-
trol
Auxiliary
output
[V/W]
Ta
[°C]
Tc
max
[°C]
Lifetime
L70/B50
at T
max.
c
ECG (OTPOTRONIC®)
Dimensions
[mm]
[h]
Length
Width
Height
OTp DALI 45/220-240/700 HD FAN (*) 45 DALI 5/1 -20…50 80 50,000 123 79 33
OTp 45/220-240/700 HD FAN (*) 45 – 5/1 -20…50 75 50,000 123 79 33
OTp 45/220-240/700 HD (*) 45 – – -20…50 80 50,000 123 79 33
OTp DALI 35/220-240/700 HD (*) 35 DALI – -20…50 80 50,000 123 79 33
OTp 35/220-240/700 HD (*) 35 – – -20…50 75 50,000 123 79 33
OTp 35/220-240/700 (*) 35 – – -20…50 80 50,000 123 79 33
OTp 15/220-240/700 HD (*) 15 – – -20…50 75 50,000 109 50 35
Cable clamp kit for strain relief available, see 1.2.4. Accessories (page 13).
(*) Target values
1.2.3. System combinations
Within rated power, light engines and power supplies can be
fl exibly combined, e. g. according to desired control option
The connection between light engine and ECG should be
established by supplied cable kit. Available in lengths 40 cm
and 80 cm, please also refer to: 3.2. Wiring information.
or form factor. Valid and possible combinations of light en-
gines and ECGs are listed below, a general requirement is
that HD light engines require the use of “HD” ECGs and that
each light engine is connected by a single ECG.
All ECGs utilize well-established housing form factors to facili-
tate adoption of existing luminaire housings or accessories to
the PrevaLED
®
technology.
10
Compatibility chart PrevaLED
®
light engine – ECG
INTRODUCTION
LEP-3000xxx-HD-C
LEP-2100xxx-HD-C
LEP-1500xxx-HD-C
LEP-800xxx-HD-C
LEP-30008xx-C-Z2
LEP-20008xx-C-Z2
LEP-15008xx-C-Z2
OTp DALI
45 HD Fan
OTp 45 HD
Fan
OTp 45 HD OTp DALI
35 HD
PrevaLED
®
Core HD
xxxx
PrevaLED® Core ECO Z2
xxxx
OTp 35 HD OTp 35 OTp 15 HD
xx
xx
x
x
x
LEP-8008xx-C-Z2
(*) Under development
Recommended
Suitable
x Not possible
ECG and light engines operate 1:1
11
INTRODUCTION
1.2.4. Accessories
LEP-PreMix
The PreMix offers an optimized light homogeneity for re-
fl ector-based applications such as downlights and spotlights.
Benefi ts:
• Reduces color fringing and multiple shadows
• Snap mounting in light engine locking ring
• For use with 800–3000 lm light engines
• Additional protection of the light engine against touching
Technical features:
• Diffuse interior and structured outer surface for optimized
light homogeneity
• Durable glass construction
• Min. transmission 85 %
• Compatible with PrevaLED
®
Core HD:
LEP-800, LEP-1500, LEP-2000 and LEP-3000
• No impact on the lifetime of the light engine
Cable kit
The cable is required for contacting and connecting the
individual PrevaLED
®
Core light engine with the power supply.
Two various fl exible and reverse polarity protected cable kits
are available (cable kit for PrevaLED
PrevaLED
®
Core ECO Z2 version with a lower connector).
®
Core HD and the
PrevaLED ® Core HD cable kit
12
PrevaLED ® Core ECO Z2 cable kit
Cable clamp for OTp
This cable clamp gives the ECG a strain relief and turns it into
an ECG suitable for independent installation. It is available for
order for all OPTOTRONIC
®
OTp 35 and OTp 45.
INTRODUCTION
13
OPTICAL CONSIDERATIONS
2. Optical considerations
Comparison of LED array and chip-on-board (CoB) designs
PrevaLED® Core light engines can be designed in two different ways:
either as LED arrays or as chip-on-board (CoB) technology.
PrevaLED ® Core HD PrevaLED ® Core ECO Z2
When designed as LED arrays, PrevaLED® Core light engines
consist of several high-power LED packages covered with
phosphor and arranged in a certain pattern (cf. the images
above). The key advantage of this design is the large beam
angle: >130° FWHM.
The CoB design is characterized by various single low-power
LED chips, arranged in a certain grid which is covered with
phosphor (cf. the image above). The key advantage of this
design is that it provides a very homogeneous light distribution.
14
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