Zero-current switching quasi-resonant converters operating in a full-wave mode

A quasi-resonant converter for providing regulated power comprising:

• (a) a voltage source;
• (b) a load;
• (c) a low pass filter formed from at least an inductor and a capacitor for filtering signal applied to said load;
• (d) bidirectional resonant switch means to be periodically actuated and deactuated, said switch means including a switch, a resonant capacitor, and a resonant inductor, said switch being actuated to a first state to permit a current flow in a first direction from said voltage source to said load and to block a current flow in a second, opposite direction, and being actuated to a second state to permit a current flow in said second direction from said load to said voltage source and to block the current flow in said first direction, for operating said quasi-resonant converter in a full-wave mode;
• and
• (e) said switch means being actuated to its first state to couple said resonant capacitor and said resonant inductor to form a resonant circuit, and to apply a charging current from said voltage source to said resonant capacitor, said resonant capacitor and said resonant inductor having respective selected impedances to establish a resonating current waveform on said resonant inductor, said resonating current waveform being applied to actuate and deactuate said switch means under zero current conditions.