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AN1894 Datasheet(PDF) 13 Page - STMicroelectronics |
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AN1894 Datasheet(HTML) 13 Page - STMicroelectronics |
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13 / 14 page ![]() 13/14 AN1894 - APPLICATION NOTE Following pictures starting from Figure 27 to Figure 34 show the most important voltage or current waveforms at different input and output conditions. The channel 1 (pink) is the power MOSFET Source terminal voltage of the VIPer12. The channel 4 (red) shows the inductor current. The purpose of those pictures is to demonstrate the skipping cycle function at light or no-load condition and cycle-by-cycle primary current limitation at overload or output shorted condition. Figure 27: Vin= 127VDC, Iout= 100mA Figure 28: Vin= 127VDC, Iout= 50mA Figure 29: Vin= 373VDC, Iout= 100mA Figure 30: Vin= 373VDC, Iout= 50mA Figure 31: Vin= 373VDC, no-load Figure 32: Vin= 127VDC, no-load |
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