onsemi NCP1632DR2G, Power Factor Controller IC 130 kHz 16-Pin, SOIC 10.4V

The NCP1632 integrated a 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 (no need for low trr diodes). In addition, the NCP1632 drivers are 180o phase shifted for a significantly reduced current ripple. Housed in a SOIC16 package, the circuit incorporates all the features necessary for building robust and compact interleaved PFC stages, with a minimum of external components.

• 180° out of phase operation
• Low EMI and reduces RMS current in the bulk capacitor
• Frequency Clamped Critical conduction Mode (FCCrM) operation
• Optimize efficiency over the load range
• Frequency foldback at low power
• Improve light load efficiency
• Integrated Overcurrent protection, Overvoltage protection, UVLO and brown-out protection
• Increase system reliability
• Applications
• All Off Line Appliance Requiring Power Factor Correction
• SMPS
• Flat panel TVs
• Computer Power Supplies
• LCD TV
• Server power, networking power