Download - How to Read a Datasheet: LED Fundamentals
LED Fundamentals
How to Read a DatasheetDatasheet (Part 1 of 2) Typical/Maximum Characteristics and Binningg
08-19-11
LED Parameters
Optical Quantities
Luminous Intensity IV Luminous Flux V
Electrical Quantities
Forward Voltage VF
Forward Current IF Luminance LV
Radiation Characteristics 2φ Dominant Wavelength dom
Color Coordinates c c
Reverse Current IR
Color Coordinates cx, cy
Thermal Quantities Misc
Junction Temperature Tj
Temperature Coefficient TC dom
Thermal Resistance RthJS
CRI Efficiency
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OSLON SSL (LUW CP7P)
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Ordering Information
Luminous Flux at binning current is listed in lumens (lm) or millilumens (mlm).
Luminous Intensity at binning current listed in candela (cd) or millicandela (mcd).
Example LUW CP7P-KSKU-5E8G-35 Example LUW CP7P-KSKU-5E8G-35
KSKU: One brightness group KS, KT or KU will be shipped for any one reel.
5E8G: One chromaticity group from 5E to 8G will be shipped for any one reel.
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35: One forward voltage group 3, 4, or 5 will be shipped for any one reel.
Maximum Ratings
Maximum permissible surge current for pulsed operation is defined by pulse duration, duty
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Maximum permissible surge current for pulsed operation is defined by pulse duration, duty cycle and frequency for a given solder point temperature (Ts).
Typical Characteristics
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Chromaticity Coordinate Groups
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Chromaticity Coordinates
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Brightness and Forward Voltage Groups
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Spectral Emission
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V is the human eye sensitivity curve
Radiation Characteristics
For OSLON SSL (LUW CP7P) the radiation curve hits the 50% line at (φ )40°
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Therefore the viewing angle (2 φ) is here equivalent 80°
LA CP7P
Peak wavelength
Wavelength with the highest emitted electromagnetic power
Dominant wavelength
Wavelength considering human eye sensitivity; defines the color we can see
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LED Fundamentals
How to Read a DatasheetDatasheet (Part 2 of 2) Characteristic Curves, Dimensions and ,Packaging08-19-11
Forward Voltage
Increase of forward voltage leads to higher current
For special applications, forward voltage grouping maybe necessary
• OSRAM offers voltage grouping
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• Each reel contains only one forward voltage group
Forward Current
The current through the LED determines the intensity/ flux output from the LED.
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Also, there is a slight variation in the color of the LED, depending on the LED current
Junction Temperature
As Junction Temperature increases
Forward Voltage decreases
LED Fundamentals | How to Read a Datasheet | Page 16
Luminous Flux decreases
Cx, Cy decreases
Maximum Forward Current
LED Fundamentals | How to Read a Datasheet | Page 17
Pulse Current
The maximum permissible pulse current depends on :
pulse duration
LED Fundamentals | How to Read a Datasheet | Page 18
p
duty cycle
Package Dimensions
LED is protected by ESD device which is connected in parallel to LED-Chip
LED Fundamentals | How to Read a Datasheet | Page 19
The notch on the thermal pad indicates the cathode pad
Tape and Reel
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Recommended Solder Pad Layout
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Soldering Profile
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Labeling/Tape and Reel
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Packaging
LED Fundamentals | How to Read a Datasheet | Page 24
Revisions
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Remarks
LED Fundamentals | How to Read a Datasheet | Page 26
Disclaimer
All information contained in this document has been checked with the greatest care. OSRAM Opto Semiconductors GmbH can however, not be made liable for any damage that occurs in connection with the use of these contents.
OSRAM Opto Semiconductor GmbH makes no representations and warranties as to a possible interference with third parties' intellectual property rights in view of products originating from one of OSRAM Opto Semiconductor GmbH's partners, or in view of products being a combination of an OSRAM Opto Semiconductor GmbH's product and a product of one of OSRAM Opto Semiconductor GmbH's partners Furthermore OSRAMproduct of one of OSRAM Opto Semiconductor GmbH s partners. Furthermore, OSRAM Opto Semiconductors GmbH cannot be made liable for any damage that occurs in connection with the use of a product of one of OSRAM Opto Semiconductor GmbH's partners, or with the use of a combination of an OSRAM Opto Semiconductor GmbH's product and a product of one of OSRAM Opto Semiconductor GmbH's partners.
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Thank you for your attention.Thank you for your attention.