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67DC-DC Converter Design and Magnetics

Note that L  I can be visualized as a sort of inductance “ per ”

ampere — except that

the relationship is inverse. That is, if we increase the current, we need to decrease the

inductance (by the same amount). So, for example, if we get an inductance of 100  H for

a 2 A application, then for a 1 A application, the inductance must be 200  H, and for a 4 A

application, the inductance would be 50  H, and so on.

Note that because the L  I equation doesn ’ t depend on topology, switching frequency,

or on the specifi c input/output voltages, we can graph it out universally ...