1results about How to "Simple working mode" patented technology

The application provides a CLLC resonant converter soft-start device and method, which comprises a primary side and a secondary side coupled through a transformer, the primary side comprises a first H-bridge; the secondary side comprises a second H-bridge, the opposite switch tubes S1 and S4, S3 and S2 on the first H-bridge are pulsed with the same pulse respectively, and the upper and lower switch tubes on the same bridge arm are alternately conducted; the second H-bridge is uncontrolled rectification, and no driving signal is applied on the corresponding switch tube; the duty cycles of the pulse signal and the complementary pulse signal on the first H-bridge are asymmetrically changed; the pulse signal is the pulse through the switch tube S1 and the switch tube S4; the second pulse is the pulse through the switch tube S3 and the switch tube S2; the current overcurrent during starting is inhibited, the purpose of smoothly establishing the output voltage is achieved, the ZVS opening characteristic is achieved, and the ZCS closing of half of the diodes on the rectification side is always ensured, and the high-frequency oscillation of the resonant current caused by the participation of the parasitic capacitor in the resonance can be avoided.