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The paper deals with a front-end topology of a low power switched-mode power supply intended for a plug and play use. During its design, a special attention has been paid to a simple and cost effective solution confronted with a wide input line-voltage range (57divide3times240)middot(1plusmn0.2) VRMS and with the frequency range from 40 Hz to 65 Hz. Such extreme demands are particularly of interest...
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