The UCC38051PG4 from Texas Instruments is a discontinuous (transition-mode) PFC controller Integrated Circuit operating at 200 kHz, in an 8-PDIP package.
The UCC38051D from Texas Instruments is a discontinuous (transition) power factor correction Integrated Circuit operating at 200 kHz, in an 8-SOIC package.
The UCC38051P from Unitrode is a power factor correction (PFC) controller Integrated Circuit with discontinuous (transition) operation at 200 kHz, in an 8-PDIP package.