PEAK EFFICIENCY TRACKING IN AN LLC CONVERTER OF A MULTI-STAGE POWER CONVERSION SYSTEM
개요
출원인
STMicroelectronics International N.V.
발명자
Ranajay Mallik; Akshat Jain
IPC 분류
CPC 분류
According to an embodiment, an LLC resonant converter includes a switching bridge having a plurality of power switches. The switching bridge is configured to receive a DC voltage input and generate a square waveform based on a pulse-modulated frequency (PFM) signal. The LLC resonant converter further includes a resonant tank circuit coupled to the switching bridge. The resonant tank circuit includes a resonant inductor. The resonant tank circuit is excited in response to receiving the square waveform. The PFM signal is adjusted such that the elapsed time between a rising edge of a drain-to-source voltage of a power switch and a zero-crossing point of current flowing through the resonant inductor falls within a predetermined range corresponding to the resonant tank circuit operating at its resonant frequency.
원문 (중국어)
According to an embodiment, an LLC resonant converter includes a switching bridge having a plurality of power switches. The switching bridge is configured to receive a DC voltage input and generate a square waveform based on a pulse-modulated frequency (PFM) signal. The LLC resonant converter further includes a resonant tank circuit coupled to the switching bridge. The resonant tank circuit includes a resonant inductor. The resonant tank circuit is excited in response to receiving the square waveform. The PFM signal is adjusted such that the elapsed time between a rising edge of a drain-to-source voltage of a power switch and a zero-crossing point of current flowing through the resonant inductor falls within a predetermined range corresponding to the resonant tank circuit operating at its resonant frequency.