I'm using a TLP222A to switch a 24V load that never pulls more than about 200mA. My circuit looks like this, ignore that the chip name is wrong.
I have 4 of these connected to 4 GPIO pins. 2 of them have, for no reason I can discern, stopped working. They show 1.15V at the input, which to me implies that the diode inside is conducting normally. The GPIO seems fine. But the output is floating, like the chip is broken.
I'm confident that I did not pull more than the on state current of 500mA nor anywhere near the peak 1A. I also used 220ohm resistors to supply 10mA to the diode, which is also well below its maximum rating.
Not really sure what else to look for, here. :/
Edit: as requested, here is a link to one of the industrial LEDs I am driving. This is the load. There are 4 of them, each on separate SSR's.