Building An Off-Line Flyback

Designing a reliable and efficient auxiliary power supply is a fundamental task in many electronics projects, especially when dealing with systems that require isolation from the mains. In this article, we’ll explore the process of building a 10W off-line flyback converter—a popular topology for compact AC-DC conversion.

Whether you’re powering microcontrollers, sensors, or gate drivers, understanding the principles and practical considerations behind flyback design will help you create robust auxiliary supplies for a wide range of applications. We’ll cover the essential theory, component selection, and practical tips to get your own flyback supply up and running.