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help me with the ESD circuit

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liucheng311

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dear everyone
i am going to integrate a full-bridge rectifier in a chip,the rectifier is shown below,line1 and line2 are the two input terminals,and P is the positive output,N is the negative output.this rectifier is used to rectify a DC power supply whose positive wire and negative wire are not identified.
here is my problem: how should i design the ESD protection circuit for the rectifier?since the two wires of the dc power supply are not identified,i can not put the ESD protection circuit between line1 and line2.can anyone help me?
thank you in advance!
 

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I've designed a lot of pin ESD protection and I can't help you. Because
ESD is very contextual; you need to know all the ports where pin current
can be put into / out of the circuit.

Which of the nodes are exposed to any external pin? Start with that.
 
ESD protection circuit design is really difficult
 

Please try bi-directional triggerring ESD design.
 
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