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ESD protection for equipment that use isopower devices

Question asked by Ghayal on Jan 22, 2015
Latest reply on Jan 27, 2015 by Ghayal

We are using ADum5211 / 5401 isolation devices on our product. Will a safety capacitor provided between the two side's ground help in enhancing ESD protection? Presently it is not possible to filter out the ESD from the isolated side to body earth due to our PCB design limitation. We have the non-isolated ground connected to chasis earth which is expected to absorb all the ESD surges passed through the safety capacitor in the sequence ESD surge> isolated ground > safety capacitor > non-isolated ground > body earth.

 

Will this scheme result in any compromise on isolation that the device provides?

 

I also understand that the safety capacitor can help in controlling EMI. 

 

Please comment.

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