In this adjustable output practical design example, a maximum input voltage of 28V, and an output voltage of 20V will be selected. The maximum load current will be 1.0.A. Using the formula given in Slide #10, the calculated E*T value will be 34.8V-usec. Now, it is very easy to find the correct inductor using the inductor selection graph in the preceding slide, and the chart in Slide #8. The ordinates intersect in the 100 micro Henry region, in the L29 zone.