PFC & LLC
Achieve higher efficiency, reduce THD, and improve power density with our PFC and LLC controllers
Experience the benefits of zero voltage switching, noise immunity and optimized load performance
Paired together, our power factor correction (PFC) and inductor-inductor-capacitor (LLC) controllers offer exceptional performance for power supplies ranging from 100W to 2kW. With features such as zero voltage switching, low electromagnetic interference, high switching frequency capability and optimized load performance, our LLC controllers offer audible noise immunity, while integrated features help simplify your system designs. In switched-mode power supplies, our PFC controllers deliver high efficiency, reduced standby times, a superior power factor, and improved distortion.
Browse products by category
Single-phase PFC controllers
Interleaved PFC controllers
LLC controllers
Implement efficient power supplies with analog PFC & LLC controllers
High power factor AC-to-DC power conversion with lower distortion for all regions and topologies
Power factor correction (PFC) systems reduce the burden on power distribution systems to meet regulatory standards. Our PFC integrated circuits enable a higher power factor by precisely sensing voltage and current while also minimizing total harmonic distortion.
Our PFC controller solutions enable you to achieve higher light-load efficiency from burst mode and implement subtopologies optimized for simplicity or performance. For example, there are PFC controllers for single-phase or interleaved applications depending on density, thermal and electromagnetic interference requirements.
>95% Efficiency, 1kW Analog Control AC/DC Reference Design for 5G Telecom Rectifier
An Interleaved PFC Preregulator for High-Power Converters
Featured products for PLC
Convert DC voltages from high to low with higher power density, efficiency and stability
In switched-mode power supplies, lightning, server and consumer applications, the inductor-inductor-capacitor (LLC) topology has a smaller electromagnetic interference footprint than hard-switching pulse-width modulators. Many LLC controllers offer integrated gate drivers with features such as X-capacitor discharge with soft burst-mode in and out and standard protection.
Modern DC/DC systems need more integrated features, higher resonant frequencies, advanced control law and protections, and optimized battery charging. New use cases for LLC controllers are emerging for vehicles and chargers from architectural trade-offs plus functional safety standards for autonomous vehicles. Our LLC controller portfolio addresses these challenges.
Universal Input, 500W Constant Current and Constant Voltage E-Bike Charger Reference Design
300W Thin-Profile LLC Reference Design
Design & development resources
Universal input, 430W power tool charger reference design
300W thin profile LLC reference design
This reference design demonstrates a half-bridge resonant converter on a single copper layer printed circuit board (PCB) that accepts a 385V input and generates an isolated 22.5V output up to 13.5A load. This design is comprised of the UCC256603 half-bridge LLC controller and UCC24612 synchronous (...)