onsemi NCP1632 power factor controller, interleaved, 2-phase

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. Housed in a SOIC16 package, the circuit incorporates all the features necessary for building robust and compact interleaved PFC stages..

Key features

• 180° out of phase operation
• Frequency Clamped Critical conduction Mode (FCCrM) operation
• Frequency foldback at low power
• Integrated Overcurrent protection, Overvoltage protection, UVLO and brown-out protection

Additional features

• 180° out of phase operation
• Frequency Clamped Critical conduction Mode (FCCrM) operation
• Frequency foldback at low power
• Integrated Overcurrent protection, Overvoltage protection, UVLO and brown-out protection

Applications

• All off line appliance requiring power factor correction
• SMPS
• Flat panel TVs
• Computer Power supplies
• LCD TV
• Server power, networking power

Available tools

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.