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NCP1681BAD2R2G - Totem Pole Multi-mode Power Factor Correction Controller

Product Overviews

NCP1681BAD2R2G is an innovative Multi−Mode (MM) and Continuous Conduction Mode (CCM) Power Factor Correction (PFC) controller IC designed to drive the bridgeless totem pole PFC topology. The bridgeless totem pole PFC consists of two totem pole legs: a fast− switching leg driven at the PWM switching frequency and a second leg that operates at the AC line frequency.

General Features

• Totem Pole PFC Topology Eliminates Input Diode Bridge Enabling Very High Efficiency & Compact Design

• AC Line Monitoring Circuit & AC Phase Detection

• Brownout Detection

• Digital Loop Compensation

• Novel Current Sensing Scheme Providing Inductor Current Upslope and Downslope Sensing

• PFCOK Indicator

• Skip/Standby Mode for Optimizing Light Load Performance

• Near−Unity Power Factor in All Operating Modes

Applications

• Cloud/Server Power Supplies

• High Performance Computing

• 5G/Telecom Power Supplies

• Industrial Power Supplies

• Ultra−High Density (UHD) Power Supplies

• Merchant Power

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