ViPER16HN non-iso buck failing after one to four weeks of operation at 277VAC. Could the pulsating input voltage be the problem?
Dear AC-DC Forum, I'm helping to troubleshoot a design using the ViPER16HN as a non-isolated buck. It's part of a power supply that uses PFC, so the input voltage goes from nearly zero to about 400V peak each AC line half-cycle. When used at 277V...