XDPL8219 XDP™ Digital Flyback Controller Infineon Technologies XDPL8219 XDP™ Digital Flyback Controller features enhanced Power Factor Correction (PFC) and secondary-side regulated constant voltage output. The XDPL8219 operates in Quasi-Resonant Mode (QRM) to maximize the efficiency and minimize the electromagnetic interference (EMI) over a wide load range. The XDPL8219 Flyback Controller enters Active Burst Mode (ABM) at light load to prevent audible noise from being heard while achieving no-load standby power as low as <,100mW.