NCP1632ADR2G
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Onsemi NCP1632A Critical Conduction Mode (CrM) Power Factor Controller is an interleaving, 2-phase PFC controller. In heavy load conditions, the NCP1632A operates in critical conduction mode (CrM). The device can also operate in discontinuous conduction mode (DCM) with frequency foldback in light load for an optimized efficiency over the whole power range. The NCP1632A integrates a wide range of protection features for rugged operation. The device is ideal for applications where high-level efficiency over the load range and near-unity power factor are the key requirements.
The NCP1632A integrates a dual MOSFET driver for interleaved PFC applications. Interleaving consists of paralleling two small stages instead of a larger one. This process eases implementation, enables the use of smaller components, and offers better heat distribution. Interleaving also extends the power range of Critical Conduction Mode, which is an efficient and cost-effective technique eliminating the need for low trr diodes. In addition, the NCP1632A drivers are 180° phase-shifted for a significantly reduced current ripple.
Housed in a SOIC-16 package, the onsemi NCP1632A Power Factor Controller incorporates all the features necessary for building robust and compact interleaved PFC stages, with a minimum of external components.