NCP1611ADR2G 电源IC ON

NCP1611ADR2G

功率因数校正 - PFC NCP1611A ENHANCED PFC

NCP1611ADR2G Features

• Near−Unity Power Factor

• Critical Conduction Mode (CrM)

• Current Controlled Frequency Fold−back (CCFF): Low Frequency Operation is Forced at Low Current Levels

• On−time Modulation to Maintain a Proper Current Shaping in CCFF Mode

• Skip Mode Near the Line Zero Crossing

• Fast Line / Load Transient Compensation (Dynamic Response Enhancer)

• Valley Turn on

• High Drive Capability: −500 mA / +800 mA

• VCC Range: from 9.5 V to 35 V

• Low Start−up Consumption

NCP1611ADR2G Safety Features

• Non−latching, Over−Voltage Protection

• Brown−Out Detection

• Soft−Start for Smooth Start−up Operation (A version)

• Over Current Limitation

• Disable Protection if the Feedback Pin is Not Connected

• Thermal Shutdown

• Low Duty−Cycle Operation if the Bypass Diode is Shorted

• Open Ground Pin Fault Monitoring

• Saturated Inductor Protection

• Detailed Safety Testing Analysis (Refer to Application Note AND9064/D)

NCP1611ADR2G Typical Applications

• PC, TV, Adapters Power Supplies

• LED Drivers and Light Ballasts (including dimmable versions)

• All Off−Line Applications Requiring Power Factor Correction