Choosing Inductors for Energy Efficient Power Applications


In high-frequency DC-DC converters, inductors filter out the AC ripple current is superimposed on the DC output. Whether the converter steps the voltage down – buck – or steps the voltage up – boost – or both up and down–  SEPIC, the inductor smooths the ripple to provide a pseudo-DC output. Energy efficiency can be as much about the inductors as the circuit topology.

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