Designing Isolated Rails On The Fly with Fly-buck Converters
Isolated bias rails are common in test and measurement equipment, process control, telecommunications systems, building infrastructure, and industrial automation systems. Traditionally, isolated supply design has been a tedious process involving loop compensation, optocouplers, extra windings, and/or pre-regulated primary rails. The effort, complexity, solution size, and cost involved are not really justified at relatively low power levels. This white paper presents Fly-Buck converters as a simple, easy, and cost-effective way of generating multiple isolated rails. Actual examples from different application areas are presented to illustrate the usefulness of the FlyBuck-based approach for low-power isolated designs up to 15W.
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