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LITIX™ Power: Why should a coupled-inductor be used in SEPIC converters?

LITIX™ Power: Why should a coupled-inductor be used in SEPIC converters?

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SEPIC DC-DC converter needs two inductors to properly work. The two inductors can be wrapped on the same core (coupled inductors) or on two separated cores (uncoupled inductors). 
SEPIC using coupled inductors shows:
* higher efficiency due to reduced magnetic core losses
* reduced PCB area because it needs the space for only one magnetic component
* simpler compensation due to simple transfer function 
On the other hand SEPIC using uncoupled inductors can benefit from components coming from a wider inductance selection, thus proving flexibility in the system design.

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