A novel crossing current resonant converter (XCRC)

Unlike other resonate or soft-switching converter, this novel topology employs only two switches and a very simply control method. The inherent constant power protection feature is another merit. No special resonate chip is needed to control the circuit. By adding two diode parallel with the dividing capacitors and selecting the capacitors for a small value that will fully charge and discharge in one cycle, one can obtain the zero voltage switching characteristic and control the output voltage regulation by frequency modulation. An industrial standard PWM chip can be easily modified to a VCO as the control element