UL 62368 short circuit test of power supply
We are having our power supply tested by UL. They are performing UL 62368 B.4 short circuit tests.
One thing they decided to short is our Power Integrations Tinyswitch III - TNY276GN. Our circuit is roughly similar to the one provided as an example in the datasheet.
In this, the EN/UV (pin 1) is connected directly to an opto.
They are shorting pin 4 (connected to the transformer) directly to pin 4. This damages the opto and the circuit will no longer pass hipot.
This test seems inappropriate to us, given that the short has to jump the empty space and then another pin.
Do you have experience with this sort of test being performed and passed? Is there a rule that device's missing pin is supposed to keep this test from being performed?