Good evening, Tom Morris! I’m impressed by your article: “Under the hood: The Outback FM80”. From the pictures I had figured out, that FM80 is based on two-channel dual phase synchronous buck-topology. It inspired me to build my own MPPT controller. Currently I’m carrying out experiments with buck-converter. But there’s a problem: I’m using 100V MOSFETS, but they burns, when the PV voltage is greater than 65V… The ratio between 65 and 100 is equal to 0.65. There must be safety operation under this conditions. I think they burnt because of voltage spikes or because of shoot-through during reverse recovery of synchronous MOSFET. Now look at FM80. They use there 150V FDP2532 MOSFETs and they say, that PV voltage shouldn’t exceed 140V. So the ratio between 140 and 150V is 0.93, practically no safe operation under 140V. Please, help me, if you can: How in the world they suppress voltage spikes on MOSFETs in FM80, if there is so low margin between maximum operating voltage and allowable Vds of MOSFETs and their MOSFETs don’t burn? I saw on FM80’s PCB some tiny diodes and resistors and ceramic capacitors. Are they RCD-snubbers or something else? At last, have some more pictures of FM80 for example from bottom of PCB? Thanks a lot in advance! url: https://www.kg4cyx.net/under-the-hood-the-outback-fm80/