Fully-digital switch mode AC/DC converter features two power stages

Consisting of two power stages, STM's STEVAL-ISV147V2 digital switch mode AC/DC converter is now available from Mouser stock. The two stages are an input semi-bridgeless power factor corrector (SBPFC) controlled by an STM32F051K8, and a regulation stage implemented with a LLC half-bridge with synchronous rectification (SR), controlled by an STM32F334C8 microcontroller. The 500W AC/DC converter uses the bridgeless PFC topology which has the advantage of lower conduction losses and higher efficiency by eliminating the need for a diode rectifier stage.