access icon free Effect of secondary discharge on the repeatability of contact discharge method

Submillimetre gaps caused by buttons, switches exist in the electronic device. IEC 61000-4-2 indicates that contact discharge method will be used if these floating metals could be touched in its normal use. Secondary discharge happens when conduct contact discharge on these floating metals. The influence of the secondary discharge on the repeatability of contact discharge method using experimental method is analysed. At same applied voltage, the secondary discharge current varies largely, causing bad repeatability. The time lag is the main parameter that influences the secondary discharge greatly. The time lag distribution is also analysed.

Inspec keywords: switches; discharges (electric); electrical contacts

Other keywords: electronic device; contact discharge method; secondary discharge effect; floating metal; time lag distribution analysis; switch; IEC 61000-4-2 standard

Subjects: Relays and switches; Dielectric materials and properties

References

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      • 1. IEC 61000-4-2: ‘Electromagnetic compatibility (EMC) – part 4-2: Electrostatic discharge immunity test’, Ed. 2.0, 2008.
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      • 3. Wolf, H., Gieser, H.: ‘Secondary discharge – a potential risk during system level ESD testing’. 2015 37th Electrical Overstress/Electrostatic Discharge Symp. (EOS/ESD), Reno, NV, USA, September 2015, pp. 17.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2017.2958
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