Safety agency testing of TNY276GN & optocoupler current limiting
Forums: AC-DC Conversion Forum
If safety agency applies a short-circuit between pins 1 & 4 of TNY276GN, EOS occurs at the detector of the optocoupler. Subsequently, the optocoupler suffers catastrophic failure caused by the rapid temperature rise and explosion which, in turn, compromises the DTI and the unit no longer passes Hi-POT. The fuse