NCP1632ADR2G

NCP1632A is a critical conduction mode (CrM) power factor controller. It is 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 NCP1632A drivers are 180o phase shifted for a significantly reduced current ripple. The circuit incorporates all the features necessary for building robust and compact interleaved PFC stages, with a minimum of external components. Typical applications are all offline appliance requiring power factor correction, SMPS, flat panel TVs, computer power supplies, LCD TV, server power, networking power.

• Brown out blanking time 50ms, Pin latch threshold 2.5V
• 180° out of phase operation, frequency foldback at low power
• Frequency clamped critical conduction mode (FCCrM) operation
• Integrated overcurrent protection, overvoltage protection, UVLO and brown-out protection
• Improved system robustness, optimize efficiency over the load range
• Low EMI and reduces RMS current in the bulk capacitor
• Improve light load efficiency, increase system reliability
• SOIC−16 package, fast line/load transient compensation
• Accurate zero current detection by auxiliary winding for valley turn on
• Soft start for smooth start−up operation, programmable adjustment of the maximum power