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In this paper, the ultrahigh step-down converter with an active clamp circuit is proposed. With the active clamp circuit, the voltage spike across the central-tapped switch can be suppressed. The switches can achieve zero-voltage-switching (ZVS) turn-on or zero-current-switching (ZCS) turn-off. Finally, theoretical analysis and experimental results are given to verify the feasibility and effectiveness...
A non-isolated dual half-bridge zero-voltage-switching (ZVS)/ zero-current-switching (ZCS) high step-down converter with zero dc bias current and active clamp is presented in this paper. Owing to the use of the dc-blocking capacitors, the dc magnetizing inductance current of the coupled inductor is zero. Thus, the magnetizing current can be both positive and negative, which means that the entire core...
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