NCP1631 Datasheet | onsemi

DATA SHEET .onsemi. Interleaved, 2-Phase Power Factor Controller The NCP1631 integrates 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 ponents 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 NCP1631 drivers are 180 phase shift for a significantly reduced current ripple. Housed in a SOIC16 package, the circuit incorporates all the Features necessary for building robust and pact interleaved PFC stages, with a minimum of external ponents. General Features - Near- Unity Power Factor - Substantial 180 Phase Shift in All Conditions Including Transient Phases - Frequency Clamped Critical Conduction Mode (FCCr M) i.e., Fixed Frequency, Discontinuous Conduction Mode Operation with Critical Conduction Achievable in Most Stressful Conditions - FCCr M Operation Optimizes the PFC Stage Efficiency Over the Load Range - Out- of- phase Control for Low EMI and a Reduced rms Current in the Bulk Capacitor - Frequency Fold- back at Low Power to Further Improve the Light Load Efficiency - Accurate Zero Current Detection by Auxiliary Winding for Valley Turn On - Fast Line / Load Transient pensation - High Drive Capability: - 500 m A / +800 m A - Signal to Indicate that the PFC is Ready for Operation (“pfc OK” Pin) - VCC Range: from 10 V to 20 V SOIC- 16 D SUFFIX CASE 751B MARKING DIAGRAM NCP1631G AWLYWW = Assembly Location WL = Wafer Lot =...