NCP1622 Description
Enhanced, High-Efficiency Power Factor Controller NCP1622 TSOP−6 SN SUFFIX 1 CASE 318G The 6−pin PFC controller NCP1622 is designed to drive PFC boost stages. It is based on an innovative Valley Synchronized Frequency Fold−back (VSFF) method. In this mode, the circuit classically operates in Critical conduction Mode (CrM) when Vcontrol voltage exceeds a programmable value Vctrl,FF.
NCP1622 Key Features
- Near-Unity Power Factor
- Critical Conduction Mode (CrM)
- Valley Synchronized Frequency Fold-back (VSFF): Low Frequency
- Works With or Without a Transformer w/ ZCD Winding (Simple
- On-time Modulation to Maintain a Proper Current Shaping in VSFF
- Skip Mode at Very Low Load Current (versions [B--] and [D--])
- Fast Line / Load Transient pensation (Dynamic Response
- Valley Turn-on
- High Drive Capability: -500 mA / +800 mA
- VCC Range: from 9.5 V to 30 V