Patent ID: 9537409
Date: 2017-01-03
CPC Classifications: H02M,Y02B

Claim:
1. A method of feedback commanding a resonant converter, comprising: short-circuiting a primary switching stage and turning off first and second switches of a secondary rectification stage, the resonant converter including: energizing the primary switching circuit with a positive half-wave, while keeping on the switches of the secondary rectification stage and monitoring a current flowing through said first switch; turning off the first switch and monitoring a voltage at the first switch, in response to detecting a zero cross condition of the current flowing through said first switch; carrying out one of the two following operations: turning on the first and second switches; energizing the primary circuit with a negative half-wave, while keeping on the switches of the secondary rectification stage and monitoring a current flowing through said second switch; turning off the second switch and monitoring a voltage at the second switch, in response to detecting a zero cross condition of the current flowing through said second switch; and carrying out one of the two following operations: