all home built solar system

Author	Message
Murphy's friend Guru Joined: 04/10/2019 Location: Australia Posts: 674	Posted: 02:07pm 18 Apr 2021       Many people on this forum seem to be copying the power board layout from the Chinese with regard to placing the big capacitors *inside* the heat sink where they get nice and hot and might have a shorter life. A simple solution is to place them on the underside of the PCB which also has the advantage of more heatsink fin area. I have long ago adopted the 'power capacitors on the other side' approach for my mosfet power boards. I also make these boards as two identical half bridges which has the advantage of smaller, cheaper boards, getting away with 1oz copper PCB's and a more flexible way of mounting the boards on both ends of the heat sink. I write this as a suggestion for anybody who likes to lay out their own PCB, not as a criticism for your work.