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Typical Waveforms for Switching Power Supplies 662 S w i t c h i n g P o w e r S u p p l y D e s i g n 1442 Drain Current and Voltage Waveshapes at 90 of Full Load for Minimum Nominal and Maximum Input Voltages These are shown in Figure 1419 They show the characteristic linear ramp of primary current dipdt VprimaryLprimary during the tran sistor on time At the instant of turn off they show the leakage inductance voltage spike at the rising drain The amplitude of this spike is controlled by the ......
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