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IEC 60747-5-5
Edition 2.0 2020-07
INTERNATIONAL
STANDARD
Semiconductor devices –
Part 5-5: Optoelectronic devices – Photocouplers
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IEC 60747-5-5
Edition 2.0 2020-07
INTERNATIONAL
STANDARD
Semiconductor devices –
Part 5-5: Optoelectronic devices – Photocouplers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.080.01; 31.260 ISBN 978-2-8322-8602-9
– 2 – IEC 60747-5-5:2020 © IEC 2020
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
3.7 Symbols for limiting values (absolute maximum system) over the operating
temperature range, unless otherwise stated . 16
4 Electrical characteristics . 16
4.1 Phototransistor output photocoupler . 16
4.2 Phototriac output photocoupler or solid state opto-relay . 17
5 Photocouplers providing protection against electric shock . 18
5.1 General . 18
5.2 Type . 18
5.3 Ratings . 18
5.3.1 Datasheet ratings . 18
5.3.2 Safety ratings . 18
5.3.3 Functional ratings . 18
5.3.4 Rated isolation voltages . 18
5.4 Electrical safety requirements . 18
5.5 Electrical, environmental and/or endurance test information (supplementary
information) . 19
5.5.1 Test and test sequence . 19
5.5.2 Routine test . 19
5.5.3 Sample test . 20
5.5.4 Type test . 20
6 Measuring methods for photocouplers . 27
6.1 Current transfer ratio H . 27
f(ctr)
6.2 Input-to-output capacitance C . 28
IO
6.3 Isolation resistance between input and output R . 29
IO
6.4 Isolation test . 30
6.5 Partial discharges of photocouplers . 31
6.6 Collector-emitter saturation voltage V of a photocoupler . 34
CE(sat)
6.6.1 Collector-emitter saturation voltage (DC method) . 34
6.6.2 Collector-emitter saturation voltage (pulse method) . 34
6.7 Switching times t t of a photocoupler . 35
on, off
6.8 Peak off-state current I . 37
DRM
6.9 Peak on-state voltage V . 39
TM
6.10 DC off-state current I . 41
BD
6.11 DC on-state voltage V . 42
T
6.12 Holding current I . 42
H
6.13 Critical rate of rise of off-state voltage dV/dt . 43
6.14 Trigger input current I . 46
FT
6.15 Measuring methods of common mode transient immunity (CMTI) for
photocouplers . 47
7 Testing methods of electrical ratings for phototriac couplers . 49
7.1 Repetitive peak off-state voltage V . 49
DRM
7.2 DC off-state voltage V . 50
BD
Annex A (normative) Input/output safety test . 51
A.1 Purpose . 51
A.2 Circuit diagram . 51
A.3 Circuit description . 51
A.4 Precautions to be observed . 51
A.5 Measurement procedure . 51
A.6 Specified conditions . 51
Bibliography . 52
Figure 1 – Time intervals for method a) . 12
Figure 2 – Time intervals for method b) . 13
Figure 3 – Test voltage . 15
Figure 4 – Measurement circuit . 27
Figure 5 – Measurement circuit for input to output capacitance . 29
Figure 6 – Measurement circuit for isolation resistance . 29
Figure 7 – Test circuit for withstanding isolation voltage . 30
Figure 8 – Partial discharge test circuit . 31
Figure 9 – Complete test arrangement connections for calibration . 32
Figure 10 – DC measurement circuit . 34
Figure 11 – Pulse measurement circuit . 35
Figure 12 – Switching time measurement circuit . 36
Figure 13 – Switching times . 37
Figure 14 – Measurement circuit for peak off-state current . 38
Figure 15 – Waveforms of the peak off-state voltage and current . 39
Figure 16 – Measurement circuit for peak on-state voltage . 40
Figure 17 – Waveforms of the peak on-state voltage and current . 41
Figure 18 – Measurement circuit for DC off-state current . 41
Figure 19 – Measurement circuit for DC on-state voltage . 42
Figure 20 – Measurement circuit for holding current . 43
Figure 21 – Measurement circuit for critical rate of rise of off-state voltage . 44
Figure 22 – Exponential waveform of the off-voltage (V ) . 45
D
Figure 23 – Linear pulse form of the off-voltage (V ) . 45
D
Figure 24 – Measurement circuit for the trigger input current . 46
Figure 25 – Output terminal voltage versus input forward current . 46
Figure 26 – Common mode transient immunity (CMTI) measurement circuit for
photocoupler . 47
Figure 27 – Typical waveforms of the common mode pulse (V ) and photocoupler
CM
output (V ). 49
O
Figure A.1 – Circuit diagram . 51
Table 1 – Phototransistor electrical characteristics . 16
Table 2 – Phototriac electrical characteristics . 17
Table 3 – Datasheet characteristics . 19
– 4 – IEC 60747-5-5:2020 © IEC 2020
Table 4 – Tests and test sequence for photocoupler providing protection against
electrical shock . 26
Table 5 – Test conditions . 27
Table 6 – Specified conditions for methods a) and b) . 33
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SEMICONDUCTOR DEVICES –
Part 5-5: Optoelectronic devices –
Photocouplers
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International
...