I am repairing the board of a bitcoin miner that has blown MOSFETS. I need help deciphering the buck converter operation that supplies the power to the hashing chips. It involves DB9305 DC/DC converter and Infineon BSC0901 MOSFETs probably managed by a PIC chip(on reverse side also). Any insights would be appreciated(a probable schematic would be amazing).
I suspect the PIC is blown turning on the MOSFETS 100% of the time, exceding their current limits on this 400W board. External power is a 1300W 12V DELL server PWS and comes in at the top.
I suspect the PIC is blown turning on the MOSFETS 100% of the time, exceding their current limits on this 400W board. External power is a 1300W 12V DELL server PWS and comes in at the top.
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