For the past 50 years, the forward converter has dominated the market for commercial power supplies in excess of 50 W. Despite this long history, there is still an ongoing flow of articles claiming “novel ” and “new ” variations of this circuit. Many of these prove to be reincarnations of old ideas. We'll explore some of the milestones in the history of the forward converter in this article. The Basic Forward Converter Circuit Figure 1 shows a classic forward converter circuit. There are many other variations that share the same basic energy transfer mechanism: power is delivered to the output while the primary switch is conducting
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