I have a bunch of boards with this part on them and out of 8 boards there is just 1 that is working properly. I currently am trying to switch 15 V with a 3.3 V control signal. It looks like that should be high enough to switch according to the datasheet, but even when the signal is high, the switch doesn't open. It's at room temp, so I don't think it's a thermal shutdown. What really confuses me is that it works in the one case and I've had it work in the past on previous boards. Any ideas why it wouldn't be switching properly now? I've used this up to 24 V previously.
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