I apologize if I have managed to overlook it.
I am building a fuel pump driver board to run about 40 amps. This will have 5 or 6 mosfets that will need a heat sink. This will be in a cars harsh dusty environment. I haven't seeing designs that show heat sinks in an enclosure with a fan. I would really like to prevent all the dust/moisture from getting to the board. Just wondering if anyone had an suggestions or ideas. My initial thought was to us potting to half fill the case leaving a channel through the case with the exposed heat sink fines. Then just blow the fan through that channel.
Thoughts?
I am building a fuel pump driver board to run about 40 amps. This will have 5 or 6 mosfets that will need a heat sink. This will be in a cars harsh dusty environment. I haven't seeing designs that show heat sinks in an enclosure with a fan. I would really like to prevent all the dust/moisture from getting to the board. Just wondering if anyone had an suggestions or ideas. My initial thought was to us potting to half fill the case leaving a channel through the case with the exposed heat sink fines. Then just blow the fan through that channel.
Thoughts?