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Energy Conversion/Preservation

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Aldous Mantiza

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If I converted a 9v DC to a 5v DC, what will happen to the voltage that has not been used. Will the voltage be preserved or the circuit will just consume it? Thanks :)
 

Depends on the involved kind of converter.

A linear voltage regulator will completely consume the power related to the voltage difference (ideally Iin = Iout) a switched mode converter preserve the power (ideally Pin = Pout).
 
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