The UCC28634DR is a high-power flyback controller with peak-power mode, PSR (Primary Side Regulation), adjustable CC-limit, and frequency dither functions. It is manufactured by Texas Instruments and comes in a 7-pin SOIC (Small-Outline Integrated Circuit) package, with operating temperature range from -40 to 125 degrees Celsius. This device is used in applications such as AC/DC converters, off-line power supplies, and adapter circuits, and is suitable for isolated and non-isolated applications. It offers an improved peak power efficiency of up to 20%. It can also be used to deliver an adjustable output power of up to 200W. It also offers secondary side operation with a reduced number of primary components, which improves power density and system cost. It also has built-in short circuit and open loop protections.