NCP1631 Overview
Interleaved, 2-Phase Power Factor Controller NCP1631 The NCP1631 integrates a dual MOSFET driver for interleaved PFC applications. Interleaving consists of paralleling two small stages in lieu of a bigger one, more difficult to design. This approach has several merits like the ease of implementation, the use of smaller ponents or a better distribution of the heating.
NCP1631 Key Features
- Near-Unity Power Factor
- Substantial 180 Phase Shift in All Conditions Including Transient
- Frequency Clamped Critical Conduction Mode (FCCrM) i.e
- FCCrM Operation Optimizes the PFC Stage Efficiency Over the
- Frequency Fold-back at Low Power to Further Improve the Light
- Accurate Zero Current Detection by Auxiliary Winding for Valley
- Fast Line / Load Transient pensation
- High Drive Capability: -500 mA / +800 mA
- Signal to Indicate that the PFC is Ready for Operation (“pfcOK”
- VCC Range: from 10 V to 20 V