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Do you have gerbers for Vicor DCDC demo board?.......we have a noise problem

Flyback

Well-Known Member
Hi,
We know that the Brilliant Vicor DCM3623T50M53C2T00 DCDC modules are in used in millions of PSU’s so assumed that people must have the gerbers for the Demo Board on page 7 of the following document? If so please could you send them here?

Vicor Eval Board:-
http://www.vicorpower.com/documents/user_guides/vichip/ug_ChiP_DCM_EvalBoard.pdf

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We are suspecting that since we are using it non isolated on our own test PCB, and just have a single common ground plane under the DCM module, this may be causing our noise issue. We suspect noise from the module is coupling into the ground pour directly under the module and getting back into the DCM3623 and interfering with it. Do you think this is possible? If we could see the gerbers of the Eval Board, then this would go some way to confirming this.

I suspect that the Vicor demo board has only chassis ground copper pour directly under the module, but would just like to confirm this with the gerbers?

We noticed that the demo board schem on page 7 has a chassis ground connection, and that this is isolated from the circuit primary and secondary grounds. We also noticed that Y capacitors have been place from chassis ground to all the four power rails. However, we noticed that no common mode choke is used. Please could you advise if there is a reason that no common mode choke was used, since, as you know, it is usually needed to form the LC common mode filter with the Y caps?
 

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