ماسفت درایور NCP1631

General Features :

• Near−Unity Power Factor
• Substantial 180° Phase Shift in All Conditions Including Transient Phases
• Frequency Clamped Critical Conduction Mode (FCCrM) i.e., Fixed Frequency, Discontinuous Conduction Mode Operation with Critical Conduction Achievable in Most Stressful Conditions
• FCCrM 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 Compensation
• High Drive Capability: −500 mA / +800 mA
• Signal to Indicate that the PFC is Ready for Operation (“pfcOK”Pin)
• VCC Range: from 10 V to 20 V