onsemi NCP1632ADR2G, PFC Controller, 130 kHz

The ON Semiconductor NCP series of an integrated dual mosfet driver for interleaved PFC applications. Interleaving consists of paralleling two small stages in lieu of a bigger one, more difficult to design. This approach has several merits like the ease of implementation, the use of smaller components or a better distribution of the heating. Also, Interleaving extends the power range of critical conduction mode that is an efficient and cost-effective technique.

Frequency foldback at low power
Improve light load efficiency
Optimize efficiency over the load range