Offline Buck

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Component selectionDesign tips

Characteristics

The buck converter, also called a step-down converter, is the switching regulator topology most commonly used.

With an offline buck converter, a DC voltage is converted to a smaller voltage. "Offline” in this context means, that the converter is not operated directly on mains voltage, but behind a rectifier.

During the conduction-stage the power inductor is exposed to the voltage difference between input and output of the regulator. Therefore a special high voltage inductor is required here. From an EMC point of view, the input line and the circuit node between the diode, switching controller and power inductor, the so-called "hot node", are particularly critical.

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Throwback- Safe, Reliable Designs for Non-Isolated Offline Switchers with 400VDC Rated Power...

Characteristics

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