NCP1611 Description
NCP1611 Enhanced, High-Efficiency Power Factor Controller The NCP1611 is designed to drive PFC boost stages based on an innovative Current Controlled Frequency Fold−back (CCFF) method. In this mode, the circuit classically operates in Critical conduction Mode (CrM) when the inductor current exceeds a .onsemi. When the current is below this preset level, the NCP1611 linearly decays the frequency down to about 20 kHz...
NCP1611 Key Features
- Near-Unity Power Factor
- Critical Conduction Mode (CrM)
- Current Controlled Frequency Fold-back (CCFF): Low Frequency
- On-time Modulation to Maintain a Proper Current Shaping in CCFF
- Skip Mode Near the Line Zero Crossing
- Fast Line / Load Transient pensation (Dynamic Response
- Valley Turn on
- High Drive Capability: -500 mA / +800 mA
- VCC Range: from 9.5 V to 35 V
- Low Start-up Consumption