Dead-time Optimization for Double-Clamped Zero Voltage Switching Buck-Boost Power Converter with Primary Side Sampled Feedback Control

Double-clamped zero voltage switching (ZVS) buck-boost converter with primary side sampled feedback control that is suitable for converter Chip modules has been widely used for defense and industrial applications. Aiming at the double-clamped ZVS buck-boost converter with previous primary-side sampling and voltage-mode control, this paper proposes a novel primary-side sampling scheme, which can not only calculate the output voltage, but also the output current, and can use current-mode control and optimize the duration of the dead-times. The novel control scheme gives the converter a better dynamic performance and lower switching loss.