DocID023991 Rev 1

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AN4214

Short-circuit test

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Short-circuit test

The short-circuit of output terminals of the converter is performed to analyze the safe

operation of the converter in case of overload and short-circuit. The test is performed at

140 Vac, 230 Vac and 265 Vac in order to observe for any malfunction or failure.

In particular the waveforms of drain switching voltage, drain current and Vcc of the device is

observed when attempting the short-circuit.

Looking into figures from 21 to 23, we can notice that there is no stress condition observed

in power as well as control stage. The L6564 enters into protection mode with very low

switching frequency of switching burst and MOSFET is well protected.