The schematic diagram below shows a flyback converter using the BJT controller LNK4004D. The circuit is designed to operate from 185 VAC to 290 VAC (withstand 440 VAC for indefinite time at full load) ...
Transistors in some circuit configurations work together and, frequently, need to be matched. This is so common that you can sometimes find ICs that are just a pair of transistors made with the same ...
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