A novel charge retention circuit for synchronous rectifiers

A novel charge-retention circuit, which can deal with the issue of dead time occurring in the self-driving circuit for synchronous rectifier typically adopted on the secondary side of the following topologies: dual-switch forward converter, resonant reset forward converter, RCD reset forward converter, is presented in this paper. Compared with the existing charge-retention driving circuit, it has the merits of simplified structure, shorter common conduction time, better immunity to interference and reduced driving loss. Finally, both the validity and practicability are verified by the experimental results.