ON Semiconductor’s NCP1680 PFC controller wins 2021 PowerBest award

[Introduction]Onsemi, a leader in smart power and intellisense technology, is pleased to announce that its market-leading NCP1680 Critical Conduction Mode (CrM) bridgeless totem-pole power factor correction (PFC) controller has won the “Electronic Design ” awarded the PowerBest award.

ON Semiconductor’s NCP1680 PFC controller wins 2021 PowerBest award

Onsemi (Nasdaq: ON), a leader in smart power and intellisense technologies, is pleased to announce that its market-leading NCP1680 Critical Conduction Mode (CrM) bridgeless totem-pole power factor correction ( PFC) controller was awarded PowerBest Award by Electronic Design. These awards go to the very few electronic power products that have helped engineers create winning designs, and honor those who help bring those designs to life, even though 2021 is an extremely challenging (yet another) year.

ON semiconductor‘s NCP1680 won the award for its unique realization of a bridgeless totem-pole PFC using a mixed-signal controller, providing designers with a great tool to improve the energy efficiency of high-performance power supplies, reducing cost and design Complexity. This controller is ideal for ultra-high density offline power supplies, operating at power levels up to 350 W from universal power supplies (90-265 Vac).

The bridgeless totem-pole PFC topology eliminates the diode bridge at the input of the traditional PFC circuit, which can be significantly improved by using this diode bridge in a traditional PFC circuit with a 240 W power supply to generate about 4 W of losses (about 20% of the total loss). Power Stage Energy Efficiency. The NCP1680 provides control signals for fast switching branches driven at pulse width modulated (PWM) switching frequencies and branches operating at AC frequencies. The controller can be used for almost any switching device, from conventional superjunction silicon MOSFETs to wide-bandgap devices based on silicon carbide (SiC) or gallium nitride (GaN) transistors.

The NCP1680 simplifies the design of bridgeless totem-pole PFCs with a novel current limiting structure and line phase detection mechanism. Its control loop supports a constant on-time CrM architecture with valley switching. To meet today’s global efficiency standards for light-load operation, it operates in discontinuous conduction mode (DCM) with valley synchronous conduction during frequency reversal operation.

With the NCP1680, a full-featured totem-pole PFC can be realized with only some simple external components, thus saving space and component cost. Further reduction in component count enables cycle-by-cycle current limiting without the use of Hall-effect sensors.

Available in a SOIC-16 package, the NCP1680 can also be used as part of an evaluation platform to support rapid development and debugging of advanced totem-pole PFC designs.

The Links:   MG20G6EL1 PM600CLA060