However,if the current in D1 and L1 has not fallen to zero at the end of the “on” period, the inductor current will not be zero at the next Q1 turn “on” action. Hence the current in Q1 will have a front-endstep as shown in Figure 1.11. The current in the inductor can not change <br>instantaneously .Currents in Q1 and D1 will have the characteristic ramp-on-a-step waveshape as <br>shown in Figure1.11.
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