Features

• Totem Pole PFC Topology Eliminates Input Diode Bridge Enabling

Very High Efficiency & Compact Design

• AC Line Monitoring Circuit & AC Phase Detection

• Brownout Detection

• Critical Conduction Mode (CrM) Operation

• Discontinuous Conduction Mode (DCM) with Valley Turn On under

Light Load Conditions

• Frequency Foldback in DCM with 25 kHz Minimum Frequency

• Digital Loop Compensation

• Simplified Valley Sensing

• Novel Current Limit Scheme Eliminates the Needs for Hall Effect

Sensors

• Soft Skip Mode with a Skip Flag for Optimizing Light Load

Performance

• Near Unity Power Factor in All Operating Modes

• PFCOK Indicator

Safety Features

• Soft and Fast Overvoltage Protection

• 2−Level Latch Input for OVP & OTP

• Bulk Undervoltage Protection

• Internal Thermal Shutdown

• Cycle−by−Cycle Current Limit