Patent ID: 8614566

Claim:
A DC-DC converter comprising: a main reactor having one end and other end; at least one step-up switching element having a current input end connected to said other end of said main reactor, a current output end to be connected to a ground potential, and a control end that receives a control signal for controlling on/off between said current input end and said current output end; at least one step-up diode having an anode connected to said current input end of said at least one step-up switching element and said other end of said main reactor; a snubber capacitor having one end connected to said anode of said at least one step-up diode, said current input end of said at least one step-up switching element and said other end of said main reactor; a first snubber diode having a cathode connected to other end of said snubber capacitor, and an anode connected to a cathode of said at least one step-up diode; a second snubber diode having an anode connected to said cathode of said first snubber diode and said other end of said snubber capacitor; a snubber reactor having one end connected to said anode of said first snubber diode, and other end connected to a cathode of said second snubber diode; and a capacitor having one end connected to said other end of said snubber reactor and said cathode of said second snubber diode, and other end to be connected to said ground potential.