 Buckboost Topologies |
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Buckboost Topologies |
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 Buckboost Converter
This unisolated converter is most often used as an inverting on-board post-regulator. Tough it is simple to construct, it is extremely noisy. There is no major inductance between the switch and the in/out-puts, so that pulsating currents all too easily bypass the shunt capacitors. These naturally have some esl, further encouraging spikes to travel in loops through the load, rather than in loops confined to the converter. On the whole, this topology makes a poor on-board post-regulator.   Flyback Converter
Simple to build, easy to regulate (in "light" mode,) amenable to multiple output voltages of both polarities, requiring only a single magnetic piece, and capable of producing high voltages via large turns ratios, this old standby has many virtues. Unfortunately, it shares the noise problems of its Buckboost parent, and is not well suited to high performance application. Additional problems arise from high switch stress incident with discontinuous mode, again as in the Buckboost. | Buck Converters | Boost Converters | Buckboost Converters | Further Converters | | The Four Topologies | Other Topologies | Philosophy of Design | Do the Math | | Return Home | Old Home | |
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