Patent ID: 7215101

Claim:
A soft-switching DC/DC converter, comprising: a basic non-isolated DC/DC converter, comprising: a main switch having a first terminal, a second terminal and a control terminal; and an inductor having a first terminal electrically connected to said first terminal of said main switch and a second terminal; and an auxiliary switch module, comprising: an auxiliary switch having a first terminal electrically connected to said first terminal of said inductor, a second terminal, and a control terminal; a resonant inductor having a first terminal electrically connected to said second terminal of said auxiliary switch; and a resonant diode having a cathode electrically connected to a second terminal of said resonant inductor and an anode electrically connected to said second terminal of said inductor; wherein a driving signal is input to said control terminal of said main switch and said control terminal of said auxiliary switch from a driving circuit to switch said main switch and said auxiliary switch at a zero-voltage and a zero-current so as to have zero switching loss respectively.