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LMG3410-HB-EVM: PCB Footprint issues with the 600V GaN Half-bridge demonstration board

Part Number: LMG3410-HB-EVM

Hi,

When I have received my PCB from manufacture, the PCB footprint for the half bridge GaN demonstration board is not correct. Or at least, the one I created, is not correct.

I have attached some images to support this question.

The issue is that the high current connectors do not fit into my PCB when they are inserted into the Milli-Max connectors. However, if I do not use the Milli-Max connectors, and insert the high current pins straight into my PCB, they do (just about) fit. I am worried about two things:

Mechanical strength: I do not want to snap the high current pins of the half-bridge board. I can insert them in so far before I get worried that they may snap.
Soldering: Without the actual Mili-max connectors inserted into the board, and just the pins inserted, there is obviously a larger hole left in the PCB. 


Is it okay to solder the pins directly into my PCB without the connectors, will they still conduct appropriately? This is just a prototype, so although it would be nice to be able to remove the demonstration boards, it is not essential. 

To connect them to the board directly, should I just use plenty of solder to fill the holes? 

Is there any other alternate way I can connect the demonstration board to avoid damage and this small design error? I'd rather not completely redesign my PCB board. 

Regards,

Joel

  • Hi Joel, thanks for your question.

    It is unfortunate that the daughter card was incompatible with the Milli-Max connectors. However, this is not a problem. You can use wires to directly connect the daughter card onto your motherboard or you can also solder the card directly. There should be no problems with regards to pin conduction. 

    Best regards,

    John