PSDS 2024 – Creating a primary-side regulation flyback converter using a conventional boost controller
Primary-side regulation (PSR) regulation eliminates the need for optocoupler-based feedback by sensing the voltage across the primary or auxiliary winding, an approach that reduces system costs and enhances reliability. Flyback controllers featuring integrated advanced feedback circuitry specifically designed for primary-side sensing are broadly available, but it is also possible to achieve PSR-type feedback using standard boost controllers. Despite its apparent simplicity, this implementation has its own caveats.
