UM1542 Datasheet, PDF (36/43 Pages) STMicroelectronics – Cold thermostat kit based on AC switches and the STM8S003F3

Procedure to apply IEC 61000-4-4 burst test
UM1542
Appendix E Procedure to apply IEC 61000-4-4 burst test
Fast transient voltage tests have been performed, according to the EN 61000-4-4 standard,
on the STEVAL-IHT001V2 board in standalone mode. During the tests, loads were replaced
by incandescent lamps in order to visually detect any load spurious turn-on. Arrangements
have been taken in order to implement tests in agreement with the EN61000-4-4 standard.
Equipment under test was placed on a ground reference plane, insulated from it by an
insulating support 0.1 m ± 0.01 m thick. The NTC (1 m long) (see Figure 16), and all the
cables to the loads were placed on the same insulating support. The power supply to the
EUT was placed on an insulation support 0.1 m above the ground reference plane.
Bursts were directly coupled with equipment.
The test generator was placed directly on, and bonded to, the ground reference plane.
The board was not connected to the earthing system.
Figure 16. Test setup
Bursts
generator
Thermostat board
NTC
resistor
Blocks of ice
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Loads
According to the IEC 61000-4-4, the test signals were characterized by:
● Polarity: positive/negative
● Burst duration: 15 ms ± 20% at 5 kHz (Figure 17)
– 0,75 ms ± 20% at 100 kHz
● Burst period: 300 ms ± 20%
● Duration time: 1 minute
● Applied to: supply voltage line and neutral
Doc ID 023172 Rev 1
AM12279v1