90 to 264Vac In 100W 4x500mA LED Lighting Driver W/O Aux Flyback Power Supply f/Vcc Reference Design

This reference design uses TI multi-transformer LLC controller UCC25710 and transition mode PFC controller UCC28810 to develop a 100W four strings with 500mA per string output for general LED lighting driver. The key benefits for this solution are high efficiency: high power factor and good current matching. Meanwhile: the reference design uses innovative self start up circuit to supply Vcc on the primary side (UCC28810) and secondary side (UCC25710): and it does not use any auxilary Flyback to power main controllers. The application can be used in general LED lighting such as street light and commercial light.