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ADuM3190 spike on Eaout1

Question asked by bsoto on Jun 8, 2016
Latest reply on Jun 19, 2016 by fox

I'm using the ADuM3190 in an isolated flyback regulator, the problem I'm encountering is that when the ADuM3190 turns on (around VDD=3V), it produces a spike on the Eaout1 pin that causes the TPS40210 controller to go unstable.  I tried adding more decoupling to the ADuM3190 part but I couldn't get rid of this turn-on spike.  Is there any way to filter out or eliminate this spike at turn-on?  I have Eaout1 driving the FB pin of the TPS40210.

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