The NCP1606 is an active power factor controller specifically designed for use as a pre-converter in electronic ballasts, ac/dc adapters and other medium power off line converters (typically up to 300W) It embeds a Critical Conduction Mode (CRM) scheme that substantially exhibits unity power factor across a wide range of input voltages and power levels. Housed in a DIP8 or SOIC8 package, the NCP1606 minimizes the number of external components. Its integration of comprehensive safety protection features makes it an excellent driver for rugged PFC stages.