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Chapter 10
Off-line converters are derivatives of standard DC-DC converter topologies. For example, the
fl
yback topology, popular for low-power applications (typically 100 W), is really a buck-
boost, with its usual single-winding inductor replaced by an inductor with multiple windings.
Similarly, the forward converter, popular for medium to high powers, is a buck-derived
topology, with the usual inductor ( “ choke ” ) supplemented by a transformer. The fl yback
inductor actually behaves both as an inductor and a transformer. It stores magnetic energy as
any inductor would, but it also provides “ mains isolation ” (mandated ...