ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,483,120, issued on Nov. 25, was assigned to RICHTEK TECHNOLOGY Corp. (Zhubei, Taiwan).

"Power supply system with power factor correction(PFC) and control method thereof" was invented by Wei-Hsu Chang (Hsinchu, Taiwan), Kun-Yu Lin (Hsinchu, Taiwan) and Jyun-Che Ho (Chiayi, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A power supply system with power factor correction, includes: an AC rectifier, a power factor correction (PFC) conversion circuit, an asymmetric half-bridge (AHB) flyback converter and a communication protocol power delivery (PD) interface. When a power level of an adapter output power is lower than a power threshold, and a converte...