1. PERTURBATION ON-TIME (POT) TECHNIQUE IN POWER FACTOR
CORRECTION (PFC) CONTROLLER FOR LOW TOTAL HARMONIC
DISTORTION AND HIGH POWER FACTOR
ABSTRACT:
The proposed perturbation on-time technique suppresses total harmonic distortion (THD) and, thus,
improves the power factor in the power factor correction (PFC) controller. Besides, the adaptive control of
the minimum off time by the proposed inhibits time control can improve efficiency even at low ac input
voltage. Therefore, highly integrated PFC converter fabricated in the TSMC 800-V ultrahigh voltage process
can achieve low THD of 6%, high PF of 99%, and high efficiency of 95% at the output power of 90 W.