Onsemi – Latest Device Reduces Development Time and Costs, Bringing Solutions to Market Faster


PHOENIX – onsemi (Nasdaq: ON), a leader in smart power and sensing technologies, introduced its latest mixed-signal controller dedicated to bridgeless totem PFC (TP PFC) topology. The NCP1681 targets ultra-high density offline power supplies. Building on the success of the NCP1680, which is suitable for designs up to 350W, the new controller extends power capability into the kilowatt range.

In the past, TP PFC designs required the use of an MCU which added to the complexity of the design and the need for coding. However, with the NCP1681, only a few external components and no coding need be added for a complete TP PFC solution, saving time, money and space.

Commenting on the new version, Robert Tong, Senior Vice President & General Manager of Computing and Cloud Division at onsemi said, “The new NCP1681 extends the benefits of the no-code TP PFC design to higher power. This allows our customers to continue to improve their design efficiency while reducing design time and cost, enabling them to bring solutions to market quickly.’

The NCP1681 can be configured to operate in either continuous fixed-frequency (CCM) conduction mode or multi-mode operation, where the controller naturally switches between CCM and critical conduction (CrM) mode for optimal performance at all power levels .

The new NCP1681 high-power TP PFC controller integrates established control algorithms with new features to provide a high-performance, cost-effective TP PFC solution. Demanding efficiency standards such as “80Plus” or “CoC Tier 2”, which require high efficiency over a wide load range, can also be met.

The new NCP1681 is suitable for higher power supplies ranging from 350 W to several kilowatts that operate on a universal mains input (90 – 265 Vac), meeting a wide range of applications including servers, high performance computing , telecommunications, industry and OLED TV . At high levels, NCP1681 TP PFC solutions will achieve near 99% efficiency.

The NCP1681 will be featured alongside the award-winning lower power (

(C) Electronic news edition 2022, source ENP Newswire


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