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Electrostatic discharge generatorESD61000-2 is specially designed for the characteristics and requirements of electrostatic immunity test The high-reliability electrostatic discharge generator, its performance complies with the latest IEC (International Electrotechnical Commission) standard IEC61000-4-2, the European electrical standard EN61000-4-2, the national standard IOS17626.2 and the relevant provisions of ISO10605, applicable It is used for the antistatic ability test of various semiconductor devices, electronic circuits and electronic equipment.
1. Introduction:
The static electricity generated by the human body to an object or between two objects may cause electrical and electronic equipment circuits malfunction or even be damaged. Therefore, tests that simulate electrostatic discharge are widely used around the world. Electrostatic Discharge Generator (ESD Generator) or ESD Simulator (ESD Simulator), commonly known as Electrostatic Discharge Gun (ESD gun) is an electrostatic discharge device used in electromagnetic compatibility measurement and testing. Important equipment in immunity (ESD immunity) testing. The purpose is to test whether electronic equipment can work normally when subjected to external electrostatic discharge. It is the International Electrotechnical Commission standard IEC61000-4-2 Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques – Section 2: Electrostatic discharge immunity test. Basic EMC Publication, with the same name, has been equivalently transformed into the only test equipment for the Chinese standard IOS 17626.2-2006 Electromagnetic Compatibility Test and Test Technology Electrostatic Discharge Immunity Test.
ESD61000-2_Electrostatic discharge generator
Electrostatic discharge generator is mainly used inElectrostatic discharge test against human body metal model for system-level electronic equipment such as mobile phones and computers. Includes electrostatic generator and electrostatic discharge gun. The output of the electrostatic generator in the electrostatic discharge generator is either positive or negative, and some can be converted between positive and negative. Their voltage bipolar high-precision output is continuously adjustable. At the same time, it is suitable for more application fields and the requirements of new standards in the future. Therefore, the electrostatic discharge generator can be used for electrostatic discharge tests of most electrical and electronic equipment.
The electrostatic discharge generator fully complies with the requirements of the latest standards IEC61000-4-2 and IOS17626.2, establishing a common criterion for evaluating the performance of electrical and electronic equipment when subjected to electrostatic discharge. It has the advantages of stable performance and convenient use, and the voltage level can be flexibly set according to the test requirements, which is convenient for customers to choose.
2. Classification:
Electrostatic discharge generatorAccording to its own discharge voltage, it can be classified as:
Class I discharge voltage The discharge voltage is 20KV, and the other discharge voltage is 30KV
In addition, the highest discharge voltage can be customized according to EUT requirements of different industries.
3. Reference standards:
IEC/EN61000 -4-2 IOS17626.2 IEC/EN61000-6-1/ -2 IEC/EN61326 IEC61340 ANSI C63.16 ITU -T K20GR1089 -CORE ENV 50141
IV. Discharge Model
1. Human Body Model (HBM)
Human body static electricity is a trigger for explosives The most important and frequent factor in accidental explosions of electrical and pyrotechnics is that domestic and foreign anti-static hazard requirements for electrical and pyrotechnics are mainly to prevent static electricity on the human body, and the Human Body Model (HBM) has been established. ), HMB is one of the earliest and most important models established in the ESD model. The human body can store a certain amount of electric charge, so the human body obviously has capacitance. The human body also has resistance, which depends on the elasticity of human muscles, water content, contact resistance and other factors. Most researchers believe that a capacitor in series with a resistor is a reasonable electrical model, and many studies in the past have attempted to determine appropriate values for these parameters for a typical human body. A capacitor in series with a resistor is usually used as the human body model. As early as 1962, the U.S. National Mineral Service measured the capacitance of 22 people in the human body ranging from 95 to 398PF, with an average capacitance value of 240. The average resistance between hands measured in 100 tests was 4000Ω.
This data provided a good starting point for building a human body model, which, after some modifications, was used to build early analog circuits in the electronics industry. KirK et al. measured the capacitance value of the human body in the range of 132-190PF. The human body resistance value is 87-190Ω. In order to achieve consistency, the U.S. Navy proposed a so-called standard human body model with a capacitance value of 100PF and a resistance of 1.5kΩ in 1980. This standard was widely adopted, but later encountered some problems.
2. Machine model (MM)
Because it is widely used in Japan, it is also called Japanese model. The difference from the furniture model is that it is mainly composed of a string of 200pf capacitors with very low resistance (<10Ω) instead of the usual series resistors. Typical representatives of machine models include electrically insulated robot arms, vehicles, insulated conductors, etc. The discharge waveform of the machine model is similar to the expected waveform of the furniture model, except that the charged capacitance is larger. A typical machine model discharges a small resistance (<10Ω) waveform with a peak current of several hundred amps and a duration (depending on the inductance of the discharge path) of several hundred nanoseconds.
Electric Field Induced Charged Device Discharge Model (F-CDM)
With the modernization of device production and assembly, most operations on the devices are completed by automatic production lines, and the opportunities for the human body to come into contact with the devices are relatively reduced. Electronic devices themselves may become charged due to contact and friction with working surfaces and packaging materials during processing, handling, transportation, etc. When charged electronic devices approach or come into contact with a grounded conductor (human body), electrostatic discharge will occur.
Research shows that electrostatic-sensitive devices discharge electrostatic discharge to the ground conductor after being charged, causing serious harm to the components. Because the discharge process described by the charged device model is caused by the charging of the device itself, the failure of the charged device model is one of the main reasons for the damage and failure of electronic devices.
5. Application fields
The electrostatic discharge generator is mainly used for anti-static discharge testing of human body metal models on system-level electronic equipment such as mobile phones and computers. Includes electrostatic generator and electrostatic discharge gun. The output of the electrostatic generator in the electrostatic discharge generator is either positive or negative, and some can be converted between positive and negative. Their voltage bipolar high-precision output is continuously adjustable. At the same time, it is suitable for more application fields and the requirements of new standards in the future. Therefore, the electrostatic discharge generator can be used for electrostatic discharge tests of most electrical and electronic equipment.
