Semiconductor devices - Part 5-6: Optoelectronic devices - Light emitting diodes

IEC 60747-5-6:2021 is available as IEC 60747-5-6:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60747-5-6:2021 specifies the terminology, the essential ratings and characteristics, the measuring methods and the quality evaluations of light emitting diodes (LEDs) for general industrial applications such as signals, controllers, sensors, etc.
LEDs for lighting applications are out of the scope of this part of IEC 60747.
LEDs are classified as follows:
- LED package;
- LED flat illuminator;
- LED numeric display and alpha-numeric display;
- LED dot-matrix display;
- infrared-emitting diode (IR LED);
- ultraviolet-emitting diode (UV LED).
LEDs with a heat spreader or having a terminal geometry that performs the function of a heat spreader are within the scope of this part of IEC 60747.
An integration of LEDs and controlgears, integrated LED modules, semi-integrated LED modules, integrated LED lamps or semi-integrated LED lamps, are out of the scope of this part of IEC 60747. This edition includes the following significant technical changes with respect to the previous edition:
- ultraviolet-emitting diodes (UV LED) and their related technical contents were added;
- power efficiency (ηPE) as part of electrical and optical characteristics were added;
- new measuring methods related to thermal resistance were added;
- hydrogen sulphide corrosion test was added to quality evaluation;
- some standards were added to the bibliography.

General Information

Status
Published
Publication Date
05-Jul-2021
Current Stage
PPUB - Publication issued
Completion Date
06-Jul-2021
Ref Project

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IEC 60747-5-6
Edition 2.0 2021-07
INTERNATIONAL
STANDARD
Semiconductor devices –
Part 5-6: Optoelectronic devices – Light emitting diodes
IEC 60747-5-6:2021-07(en)
---------------------- Page: 1 ----------------------
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IEC 60747-5-6
Edition 2.0 2021-07
INTERNATIONAL
STANDARD
Semiconductor devices –
Part 5-6: Optoelectronic devices – Light emitting diodes
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.080.99 ISBN 978-2-8322-9853-4

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
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– 2 – IEC 60747-5-6:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 8

1 Scope ............................................................................................................................ 10

2 Normative references .................................................................................................... 10

3 Terms, definitions and abbreviations ............................................................................. 11

3.1 General terms and definitions ............................................................................... 11

3.2 Terms and definitions relating to the measurement of the quantity of

radiation ............................................................................................................... 14

3.3 Terms and definitions relating to the measurement of the photometric

quantity ................................................................................................................. 17

3.4 Terms and definitions relating to the measurement of the thermal quantity ........... 21

3.5 Abbreviations ........................................................................................................ 22

4 Absolute maximum ratings ............................................................................................. 22

5 Electrical and optical characteristics .............................................................................. 23

6 Measuring method ......................................................................................................... 24

6.1 Basic requirements ............................................................................................... 24

6.1.1 Measuring conditions ..................................................................................... 24

6.1.2 Measuring instruments and equipment ........................................................... 25

6.1.3 Essential requirements .................................................................................. 26

6.1.4 General precautions ...................................................................................... 27

6.2 Forward voltage (V ) measurement ...................................................................... 27

6.2.1 Purpose ......................................................................................................... 27

6.2.2 Circuit diagram .............................................................................................. 27

6.2.3 Requirements ................................................................................................ 27

6.2.4 Measurement procedure ................................................................................ 29

6.2.5 Precautions to be observed ........................................................................... 29

6.2.6 Specified conditions ....................................................................................... 29

6.3 Reverse voltage (V ) measurement ...................................................................... 29

6.3.1 Purpose ......................................................................................................... 29

6.3.2 Circuit diagram .............................................................................................. 29

6.3.3 Measurement procedure ................................................................................ 29

6.3.4 Precautions to be observed ........................................................................... 30

6.3.5 Specified conditions ....................................................................................... 30

6.4 Differential resistance (r ) measurement ............................................................... 30

6.4.1 Purpose ......................................................................................................... 30

6.4.2 Circuit diagram .............................................................................................. 30

6.4.3 Requirements ................................................................................................ 30

6.4.4 Measurement procedure ................................................................................ 30

6.4.5 Precautions to be observed ........................................................................... 31

6.4.6 Specified conditions ....................................................................................... 31

6.5 Reverse current (I ) measurement ....................................................................... 31

6.5.1 Purpose ......................................................................................................... 31

6.5.2 Circuit diagram .............................................................................................. 31

6.5.3 Provisions ...................................................................................................... 32

6.5.4 Measurement procedure ................................................................................ 32

6.5.5 Precautions to be observed ........................................................................... 32

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IEC 60747-5-6:2021 © IEC 2021 – 3 –

6.5.6 Specified conditions ....................................................................................... 32

6.6 Measurement of capacitance between terminals (C )............................................. 32

6.6.1 General ......................................................................................................... 32

6.6.2 Measurement using LCR meter ...................................................................... 33

6.6.3 Measurement using AC bridge ....................................................................... 33

6.7 Measurement of junction temperature (T ) and thermal resistance (R
j th(j-

, R ) .................................................................................................. 35

X)el th(j-X)real

6.7.1 Purpose ......................................................................................................... 35

6.7.2 Measurement principle................................................................................... 35

6.7.3 Measurement procedure ................................................................................ 37

6.7.4 Precautions to be observed ........................................................................... 42

6.7.5 Specified conditions ....................................................................................... 42

6.8 Response time measurement ................................................................................ 42

6.8.1 Purpose ......................................................................................................... 42

6.8.2 Circuit diagram .............................................................................................. 42

6.8.3 Provisions ...................................................................................................... 43

6.8.4 Measurement procedure ................................................................................ 43

6.8.5 Precautions to be observed ........................................................................... 43

6.8.6 Specified conditions ....................................................................................... 44

6.9 Frequency response and cut-off frequency (f ) measurement ............................... 44

6.9.1 Purpose ......................................................................................................... 44

6.9.2 Circuit diagram .............................................................................................. 44

6.9.3 Provisions ...................................................................................................... 45

6.9.4 Measurement procedure ................................................................................ 45

6.9.5 Precautions to be observed ........................................................................... 46

6.9.6 Specified conditions ....................................................................................... 46

6.10 Luminous flux (Φ ) measurement .......................................................................... 46

6.10.1 Purpose ......................................................................................................... 46

6.10.2 Measurement principle................................................................................... 46

6.10.3 Measuring circuit ........................................................................................... 46

6.10.4 Measurement procedure ................................................................................ 47

6.10.5 Precautions to be observed ........................................................................... 47

6.10.6 Measurement conditions to be defined ........................................................... 48

6.11 Radiant flux (Φ ) measurement............................................................................. 48

6.11.1 Purpose ......................................................................................................... 48

6.11.2 Measurement principle................................................................................... 48

6.11.3 Measuring circuit ........................................................................................... 49

6.11.4 Measurement procedure ................................................................................ 49

6.11.5 Precautions to be observed ........................................................................... 49

6.11.6 Measurement conditions to be defined ........................................................... 50

6.12 Luminous intensity (I ) measurement ................................................................... 50

6.12.1 Purpose ......................................................................................................... 50

6.12.2 Measurement principle................................................................................... 50

6.12.3 Measuring circuit ........................................................................................... 51

6.12.4 Measurement procedure ................................................................................ 52

6.12.5 Precautions to be observed ........................................................................... 52

6.12.6 Measurement conditions to be defined ........................................................... 52

6.13 Radiant intensity (I ) measurement ...................................................................... 52

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6.13.1 Purpose ......................................................................................................... 52

6.13.2 Measurement principle................................................................................... 52

6.13.3 Measuring circuit ........................................................................................... 53

6.13.4 Measurement procedure ................................................................................ 53

6.13.5 Measurement conditions to be defined ........................................................... 53

6.14 Luminance (L ) measurement ............................................................................... 53

6.14.1 Purpose ......................................................................................................... 53

6.14.2 Measuring circuit ........................................................................................... 54

6.14.3 Measurement procedure ................................................................................ 54

6.14.4 Measurement conditions to be defined ........................................................... 54

6.15 Emission spectrum distribution, peak emission wavelength (λ ), and spectral

half bandwidth (∆λ) measurement ......................................................................... 55

6.15.1 Purpose ......................................................................................................... 55

6.15.2 Measuring circuit ........................................................................................... 55

6.15.3 Measurement procedure ................................................................................ 56

6.15.4 Measurement conditions to be defined ........................................................... 57

6.16 Chromaticity measurement.................................................................................... 57

6.16.1 Purpose ......................................................................................................... 57

6.16.2 Measurement principle................................................................................... 57

6.16.3 Measuring circuit ........................................................................................... 60

6.16.4 Measurement procedure ................................................................................ 60

6.16.5 Measuring conditions to be defined ................................................................ 60

6.17 Directional characteristics and full width half maximum of an intensity

measurement ........................................................................................................ 60

6.17.1 Purpose ......................................................................................................... 60

6.17.2 Measuring circuit ........................................................................................... 61

6.17.3 Measurement procedure ................................................................................ 61

6.17.4 Measuring conditions to be defined ................................................................ 62

6.18 Illuminance (E ) measurement.............................................................................. 63

6.18.1 Purpose ......................................................................................................... 63

6.18.2 Measuring circuit ........................................................................................... 63

6.18.3 Measurement procedure ................................................................................ 63

6.18.4 Measuring conditions to be defined ................................................................ 63

7 Items to be indicated on the package ............................................................................. 63

8 Quality evaluation .......................................................................................................... 64

8.1 General ................................................................................................................. 64

8.2 Classification of quality evaluations ...................................................................... 64

8.2.1 General ......................................................................................................... 64

8.2.2 Classification I ............................................................................................... 64

8.2.3 Classification II .............................................................................................. 64

8.2.4 Classification III ............................................................................................. 64

8.2.5 Precautions to be observed ........................................................................... 64

8.3 Quality evaluation test .......................................................................................... 70

8.3.1 General ......................................................................................................... 70

8.3.2 Specimens ..................................................................................................... 71

8.4 Lot quality inspection ............................................................................................ 71

8.4.1 General ......................................................................................................... 71

8.4.2 Specimens ..................................................................................................... 71

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IEC 60747-5-6:2021 © IEC 2021 – 5 –

8.5 Periodical quality inspection .................................................................................. 71

8.5.1 General ......................................................................................................... 71

8.5.2 Specimens ..................................................................................................... 71

8.5.3 Inspection period ........................................................................................... 71

8.6 Easing of the lot quality inspection standards ........................................................ 71

8.7 Periodical evaluation maintenance tests ............................................................... 72

8.7.1 Test items and specimens ............................................................................. 72

8.7.2 Test period .................................................................................................... 72

8.8 Long-term storage products .................................................................................. 72

8.9 Continuous current test ......................................................................................... 72

8.9.1 General ......................................................................................................... 72

8.9.2 Initial measurement ....................................................................................... 72

8.9.3 Test circuits ................................................................................................... 72

8.9.4 Test conditions .............................................................................................. 73

8.9.5 Post-treatment ............................................................................................... 73

8.9.6 Final measurement ........................................................................................ 73

Annex A (normative) Standard luminous efficiency .............................................................. 74

Annex B (normative) How to obtain the self-absorption correction factor .............................. 77

B.1 Purpose ................................................................................................................ 77

B.2 LED light sources for self-absorption measurement .............................................. 77

B.3 Method ................................................................................................................. 77

Annex C (normative) How to obtain the colour correction factor ........................................... 79

C.1 Purpose ................................................................................................................ 79

C.2 Method ................................................................................................................. 79

C.2.1 Luminous flux and luminous intensity measurement ....................................... 79

C.2.2 Radiant flux and radiant intensity measurement ............................................. 80

Annex D (normative) Calibration of the luminance meter ...................................................... 81

D.1 Purpose ................................................................................................................ 81

D.2 How to perform the calibration .............................................................................. 81

Annex E (normative) Colour-matching function of the XYZ colour system ............................. 83

Annex F (normative) Spectral chromaticity coordinates ........................................................ 88

Annex G (normative) Illuminance meter calibration .............................................................. 93

G.1 Purpose ................................................................................................................ 93

G.2 How to perform the calibration .............................................................................. 93

Bibliography .......................................................................................................................... 94

Figure 1 – Radiant intensity .................................................................................................. 15

Figure 2 – Radiance.............................................................................................................. 16

Figure 3 – Radiant exitance .................................................................................................. 16

Figure 4 – Irradiance ............................................................................................................. 17

Figure 5 – Spectral luminous efficiency ................................................................................. 18

Figure 6 – Circuit diagram for V measurement .................................................................... 27

Figure 7 – Circuit diagram for V measurement with a constant voltage source and a

current-limiting resistor ......................................................................................................... 28

Figure 8 – Circuit diagram for V measurement using an SMU .............................................. 28

Figure 9 – Circuit diagram for V measurement .................................................................... 29

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– 6 – IEC 60747-5-6:2021 © IEC 2021

Figure 10 – Circuit diagram for r measurement .................................................................... 30

Figure 11 – Circuit diagram for I measurement ................................................................... 32

Figure 12 – Circuit diagram for C measurement ................................................................... 33

Figure 13 – Circuit diagram for C measurement ................................................................... 34

Figure 14 – An example of the temperature dependence of η ........................................... 35

Figure 15 – Heating time duration dependence of the measured thermal resistance ............. 36

Figure 16 – Cumulative thermal capacitance versus cumulative thermal resistance

characteristics (structural function) ....................................................................................... 37

Figure 17 – Circuit diagram for measurement of change in V .............................................. 38

Figure 18 – Change in V during the measurement ............................................................... 39

Figure 19 – Example of the time variation in V .................................................................... 40

Figure 20 – Transient vibration waveform immediately after the heating is off ....................... 40

Figure 21 – Circuit diagram for response time measurement ................................................. 42

Figure 22 – Waveform of response time measurement .......................................................... 44

Figure 23 – Circuit diagram for f measurement .................................................................... 45

Figure 24 – Circuit diagram for Φ measurement .................................................................. 47

Figure 25 – Circuit diagram for Φ measurement .................................................................. 49

Figure 26 – Schematic diagram for I measurement ............................................................. 51

Figure 27 – Circuit diagram for I measurement ................................................................... 51

Figure 28 – Circuit diagram for I measurement ................................................................... 53

Figure 29 – Circuit diagram for L measurement ................................................................... 54

Figure 30 – Circuit diagram for λ measurement ................................................................... 55

Figure 31 – Circuit diagram for λ measurement ................................................................... 56

Figure 32 – Schematic diagram of ∆λ measurement .............................................................. 57

Figure 33 – Chromaticity ....................................................................................................... 59

Figure 34 – Circuit diagram for chromaticity measurement .................................................... 61

Figure 35 – Directional characteristics (example 1) ............................................................... 62

Figure 36 – Directional characteristics (example 2) ............................................................... 62

Figure 37 – Circuit diagram for E measurement ................................................................... 63

Figure 38 – Circuit diagram for continuous current test ......................................................... 73

Figure B.1 – Schematic diagram for self-absorption measurement ........................................ 77

Figure D.1 – Schematic diagrams for calibration ................................................................... 82

Figure G.1 – Schematic diagram for calibration ..................................................................... 93

Table 1 – Absolute maximum ratings .................................................................................... 22

Table 2 – Electrical and optical characteristics ...................................................................... 23

Table 3 – CIE averaged LED intensity measurements ........................................................... 51

Table 4 – Items for the screening test and their conditions(reference) ................................... 64

Table 5 – Quality evaluation tests ...........................................................................

...

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