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The ;Dynamic Self Supply; feature of the NCP101x circuits interests me as it could go with a two coil only flyback transformer. I am aware of your ;GreenPoint Simulation Tool; but it seems to support only LED output loads. How to design a transformer for a constant voltage 3.8 VDC output, typically just 100 mA load but with occasional 2.5 A load bursts? Input is 195...260 VAC, 50 Hz.\n\nI hope to use NCP1013 or NCP1014.