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2 Definitions
- Contact Dischargea method of testing in which the electrode of the ESD simulator is held in contact with the device-under-test (DUT).
- Air Dischargea method of testing in which the charged electrode of the ESD simulator approaches the DUT, and a spark to the DUT actuates the discharge.
- ESD simulatora device that generates IEC61000-4-2 compliance ESD waveforms shown in Figure 2-1 with adjustable ranges shown in Table 2-1 and Table 2-2.
IEC61000-4-2 has 4 classes of protection levels. Classes 1 – 4 are shown in Table 2-1. Stress tests should be incrementally tested to level 4 as shown in Table 2-2 until the point of failure. If the DUT does not fail at 8 kV, testing can continue in 2 kV increments until failure.
| Contact Discharge | Air Discharge | ||
|---|---|---|---|
| Class | Test Voltage [± kV] | Class | Test Voltage [± kV] |
| 1 | 2 | 1 | 2 |
| 2 | 4 | 2 | 4 |
| 3 | 6 | 3 | 8 |
| 4 | 8 | 4 | 15 |
| Stress Level Step | Simulator Voltage [kV] | Ipeak ±15% [A] | Rise Time ±25% [nS] | Current at 30ns ±30% [A] | Current at 60ns ±30% [A] |
|---|---|---|---|---|---|
| 1 | 2 | 7.5 | 0.8 | 4 | 2 |
| 2 | 4 | 15 | 0.8 | 8 | 4 |
| 3 | 6 | 22.5 | 0.8 | 12 | 6 |
| 4 | 8 | 30 | 0.8 | 16 | 8 |
Figure 2-1 Ideal Contact Discharge Waveform of the Output Current of the ESD Simulator at 4 kV