shows summary of power losses. It is confirmed that switching loss is dominant at light load in both PFC and LLC.
At heavy load, conduction loss is important as expected. The latest planar outperforms the super-junction at light load condition. It shows less power losses in both DCM PFC and LLC resonant converter. At 200W load, it has little bit smaller loss in LLC but higher loss in DCM PFC. Overall loss is slightly higher by 0.4W at 200W load.
The performance of the latest planar, UniFET II has evaluated in both DCM PFC and LLC resonant converter. It showed quite good results against the super-junction device up to 200W load condition. Considering price merit and performance, UniFET II technology is a primary choice when designing switching power supply for mid-power LED lighting application.
Courtesy of EETimes Europe