High power TP PFC controller meets challenging efficiency standard

29-03-2022 | ON Semiconductor | Subs & Systems

onsemi offers its latest mixed-signal controller dedicated to bridgeless TP PFC topology. The NCP1681 is aimed at ultra-high density offline power supplies. Building on the success of the NCP1680, which is ideal for designs up to 350W, the new controller opens the power capability into the kilowatt range.

In the past, TP PFC designs needed the usage of an MCU that added design complexity and the necessity for coding. However, with the new device, only a few external components and no coding is required to be added for a fully-featured TP PFC solution, therefore saving time, cost and space.

Commenting on the new release, Robert Tong, senior vice president and general manager of Computing and Cloud Division at onsemi said “The new NCP1681 extends the benefits of code-free TP PFC design into higher power. This allows our customers to continue to enhance the efficiency of their design while reducing design time and cost, thereby delivering solutions to market quickly.”

It can be configured to work in fixed frequency CCM or multi-mode operation, where the controller naturally transitions between CCM and CrM for optimal performance across power levels.

The new high power TP PFC controller combines established control algorithms with novel elements to provide a high performance and cost-effective TP PFC solution. Challenging efficiency standards such as ‘80Plus’ or ‘CoC Tier 2’, that need high efficiency across a wide load range, can also be fulfilled.

The new device is idea for higher-power power supplies from 350W to several kilowatts range that work on universal mains input (90-265VAC), satisfing a broad range of applications including server, high performance computing, telecom, industrial and OLED TV. At high line, TP PFC solutions will reach close to 99% efficiency.

By Natasha Shek