Bridge Over Troubled Current- Why PFC Exists in the First Place

In this episode, we break down what Power Factor Correction (PFC) is actually doing inside an offline power supply. We will explain why bridge-rectifier front ends create distorted input current, how active boost PFC reshapes that waveform, and what engineers need to know about conduction modes, interleaving, EMI filters, and modern wide-bandgap topologies. It also connects classic PFC design practice with newer digital-control approaches in advanced energy systems.   RELATED SOLUTIONS: Wurth Elektronik PFC Product Family: https://www.we-online.com/en/components/products/WE-PFC LTSpice Libraries from Wurth Elektronik: https://www.we-online.com/en/support/design-tools/libraries/ltspice 1-Phase Line Filter Design Application Guide (ANP015): https://www.we-online.com/en/support/knowledge/application-notes?d=anp015-line-filter Mains Filter Application Guide: https://www.we-online.com/en/components/productnavigator/mains-filter Power Supply Product Navigator: https://www.we-online.com/en/components/productnavigator/power-supply   Listen to our PODCAST🎙️: https://www.we-online.com/en/news-center/podcast Follow us on LinkedIn: https://www.linkedin.com/company/wurth-elektronik (Americas) Follow us on LinkedIn: https://www.linkedin.com/company/wuerth-elektronik-group (Europe) Like us on Facebook: https://www.facebook.com/WurthElectronics/ (Americas) Like us on Facebook: https://www.facebook.com/Wuerth.Elektronik.Group/ (Europe) Follow us on X: https://x.com/WurthElectronic/ (Americas) Follow us on X: https://x.com/we_online (Europe) Follow us on Instagram: https://www.instagram.com/wurthelectronics (Americas) Würth Elektronik online: https://www.we-online.com/