is the relative cost of the flyback above or below 1.5?
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col : type | power\n[w] | relative cost | input range\n[v] | energy storage | features row 1 : flyback | 0–250 | 1.0 | 5–600 | mutual inductors | isolated form of the buck-boost converter. row 2 : ringing choke converter (rcc) | 0–150 | 1.0 | 5–600 | transformer | low-cost self-oscillating flyback variant. row 3 : half-forward | 0–250 | 1.2 | 5–500 | inductor |  row 4 : forward | 100-200 |  | 60–200 | inductor | isolated form of buck converter row 5 : resonant forward | 0–60 | 1.0 | 60–400 | inductor and capacitor | single rail input, unregulated output, high efficiency, low emi. row 6 : push-pull | 100–1,000 | 1.75 | 50–1,000 | inductor |  row 7 : half-bridge | 0–2,000 | 1.9 | 50–1,000 | inductor |  row 8 : full-bridge | 400–5,000 | >2.0 | 50–1,000 | inductor | very efficient use of transformer, used for highest powers. row 9 : resonant, zero voltage switched | >1,000 | >2.0 |  | inductor and capacitor |  row 10 : isolated ćuk |  |  |  | two capacitors and two inductors |
is the relative cost of the flyback above or below 1.5?
Type Power\n[W] Relative cost Input range\n[V] Energy storage Features
Flyback 0–250 1.0 5–600 Mutual Inductors Isolated form of the buck-boost converter.
Ringing choke converter (RCC) 0–150 1.0 5–600 Transformer Low-cost self-oscillating flyback variant.
Half-forward 0–250 1.2 5–500 Inductor
Forward 100-200 60–200 Inductor Isolated form of buck converter
Resonant forward 0–60 1.0 60–400 Inductor and capacitor Single rail input, unregulated output, high efficiency, low EMI.
Push-pull 100–1,000 1.75 50–1,000 Inductor
Half-bridge 0–2,000 1.9 50–1,000 Inductor
Full-bridge 400–5,000 >2.0 50–1,000 Inductor Very efficient use of transformer, used for highest powers.
Resonant, zero voltage switched >1,000 >2.0 Inductor and capacitor
Isolated Ćuk Two capacitors and two inductors
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