@gunrunnerjohn posted:You may be better off using thermal epoxy and gluing a large heatsink on the FET instead of trying to solder to the FET. It's not as effective, but it's much easier to do without killing the board.
I’d check to see if it’s tab is soldered to the board, and if it is, see if they’re using thermal vias to get the heat to the bottom of the PCB. If it’s not soldered, then I’d try bending the legs up and get it to stand and then you could attach a larger heat sink to it. I wrote a paper based on lab work I did soldering these to heat sinks for Rockford Fosgate way back in 06, before they moved production out of Arizona. They were driving so much power through there that they used tin plated copper bus bars as heat sinks. I’ll see if I could dig up my presentation. As for the bridge, last build I did I mounted the board upside down and used thermal tape to use the frame as the heat sink. Good times.
- Mario
