NCP1680 Overview
PIN DESCRIPTIONS Pin Number Pin Name Function 1 FAULT bined OVP/OTP fault pin. 2 PFCOK The PFCOK pin is held low when the PFC output voltage is out of regulation and during fault conditions. The pin bees active when the PFC output achieves regulation in nominal operation, sourcing a current proportional to the feedback voltage, VFB.
NCP1680 Key Features
- Totem Pole PFC Topology Eliminates Input Diode Bridge Enabling
- AC Line Monitoring Circuit & AC Phase Detection
- Brownout Detection
- Critical Conduction Mode (CrM) Operation
- Discontinuous Conduction Mode (DCM) with Valley Turn On under
- Frequency Foldback in DCM with 25 kHz Minimum Frequency
- Digital Loop pensation
- Simplified Valley Sensing
- Novel Current Limit Scheme Eliminates the Needs for Hall Effect
- Soft Skip Mode with a Skip Flag for Optimizing Light Load