Trait：CD5022 is a controller for Boost and SEPICregulators. The device contains all of the featuresneeded to implement single ended primary powerconverter topologies. Output voltage regulation isbased on current-mode control and this not onlyeases the design of loop compensation, but alsoprovides the inherent input voltage feedforward.The CD5022 includes a start-up voltage regulatorthat operates over a wide input range