一种带占空比补偿的LLC谐振变换器数字同步整流控制策略

To mitigate duty cycle loss at high frequencies, this paper proposes a digital control strategy for switching timing adjustment by compensating the lost conduction time. To achieve this aim, the mechanism of duty ratio loss at high frequencies is analysed and a mathematical model is developed to quantify the lost conduction time across different loads and frequencies in real time. The synchronous rectifier's conduction time is then compensated and optimized by a digital signal processor.