This application note presents a design guideline for a single-stage flyback AC-DC converter using FL6961 for LED lighting applications. It focuses on how to select and design the flyback transformer for a 16.8W (24V/0.7A) solution for universal input. The flyback converter using FL6961 operates in Critical Conduction Mode (CRM) and has functions such as CC/CV feedback circuit, soft-starting, and cycle-by-cycle current limit for LED lighting applications.
The document presents an application note detailing how to select and design a flyback transformer for a 16.8W (24V/0.7A) universal input solution suitable for LED lighting using the FL6961 controller. The converter operates in Critical Conduction Mode (CRM) and includes features such as CC/CV feedback, soft-starting, and cycle-by-cycle current limiting.
The solution is designed for a 16.8W output.
The minimum switching frequency is 50kHz.
The maximum duty cycle is 0.35.