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A high-efficiency bridgeless totem-pole Power Factor Correction (PFC) reference platform designed by the Future Design Centre in collaboration with onsemi to accelerate development, reduce system complexity, and simplify evaluation of next-generation power architectures.
The TotemX Reference Platform is a high-performance bridgeless totem-pole Power Factor Correction (PFC) development system designed to help engineers rapidly evaluate and implement efficient ac-dc power conversion solutions.
Built around a 3-kW architecture, TotemX demonstrates how a modern mixed-signal controller approach can simplify traditional digital PFC design while delivering exceptional efficiency and flexibility. By combining control and signal-chain functions within a single device, the platform reduces design complexity and accelerates time-to-market.
TotemX is optimized for continuous conduction mode (CCM) operation and leverages advanced silicon carbide (SiC) and silicon (Si) power devices to achieve high efficiency, low loss switching, and robust system performance across a wide input range.
Engineers can use TotemX to evaluate bridgeless totem-pole topologies, explore high-frequency switching behavior, and develop scalable designs for industrial and power supply applications.
TotemX is available free-of-charge to qualifying customer opportunities and provides a flexible evaluation platform to accelerate development of high-efficiency ac-dc power systems.
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Power Factor Correction (PFC) is widely used in ac-dc power supplies above 75 W. The PFC stage shapes the input current to align with the input voltage, reducing reactive power losses and improving overall system efficiency.
As efficiency requirements continue to increase, designers are moving toward bridgeless PFC topologies that eliminate the input diode bridge and its associated losses. The totem-pole PFC architecture is one of the most widely adopted approaches for achieving this high-efficiency operation.
Many traditional implementations rely on microcontrollers and external signal conditioning to manage control and sensing. TotemX simplifies this approach by using a mixed-signal controller that integrates control and signal-chain functionality into a single device, reducing component count and design complexity.
High-performance silicon carbide (SiC) MOSFETs are used in the high-frequency switching stage to minimize switching losses and reverse recovery effects, enabling high-efficiency operation across the full load range.
The TotemX platform also supports flexible hardware evaluation, with a modular half-bridge design that allows engineers to adapt and test alternative SiC or GaN-based configurations with support from Future Electronics.
The modular half-bridge card includes SiC MOSFETs, gate drivers, current transformers, and isolated dc-dc power supplies. It is fully pluggable, enabling engineers to modify and evaluate alternative device configurations with ease.
With support from Future Electronics, the platform can also be adapted to evaluate next-generation wide-bandgap technologies such as GaN FETs.
TotemX is supported by detailed application notes and full design documentation to streamline evaluation and accelerate product development cycles.
Future Electronics — TotemX Board
Future Electronics — TotemX Block Diagram
The TotemX development system features components from leading suppliers supporting the bridgeless totem-pole Power Factor Correction (PFC) topology.
All key TotemX Reference Platform components are showcased in the product carousel below for easy evaluation and selection.
