SG6902
SG6902 is Green-Mode PFC / Flyback-PWM Controller manufactured by Fairchild Semiconductor.
Product Specification Green-Mode PFC / Flyback-PWM Controller
..
The patented interleave-switching feature synchronizes the PFC and PWM stages and reduces switching noise. At light loads, the switching frequency is continuously decreased to reduce power consumption. If output loading is further reduced, the PFC stage is turned off to further reduce power consumption. For PFC stage, the proprietary multi-vector control scheme provides a fast transient response in a low-bandwidth PFC loop, in which the overshoot and undershoot of the PFC voltage are clamped. If the feedback loop is broken, the SG6902 shuts off PFC to prevent extra-high voltage on output. Programmable...
