Digital compensator design for high-frequency hybrid resonant buck converter

In this paper, the digital compensator for the voltage-mode hybrid resonant buck converter operating in CCM is designed. By observing the simulated and experimental bode plots of the loop gain, the digital signal processor (DSP) has delay, which comes from ZOH and ePWM update. Therefore, the digital compensator design is more difficult than using analog compensator. Finally, a prototype with input voltage of 24V, output voltage of 5 V, and switching frequency of 2MHz is used to verify the influence of digital compensator.