Patent ID: 8681520
Filing Date: 2014-03-25
Classification: H02M,Y02B

Abstract:
1. A full voltage range LLC resonant converter, comprising an LLC resonant converter circuit, a current type main loop current sampler, a rectifier, a main loop energy quantifier, an energy comparator, a return-to-zero pulse generator, an oscillator, and a split phase controller; wherein the current type main loop current sampler, the rectifier, the main loop energy quantifier, the energy comparator, the return-to-zero pulse generator, the oscillator, and the split phase controller are connected in series; wherein current type main loop current sampler is configured to collect a main loop current signal of a main loop of the LLC resonant converter circuit, and to send the main loop current signal to the main loop energy quantifier through the rectifier; wherein the main loop energy quantifier is configured to measure, in real time, remaining resonance energy of the LLC resonant main loop converter circuit; wherein the energy comparator is configured to output a control signal to the return-to-zero pulse generator when a value of the remaining resonance energy is lower than a predetermined value; and wherein the return-to-zero pulse generator is configured to reset the oscillator by outputting a return-to-zero pulse to the oscillator.