SLUAAK3 January 2024 UCC256402
LLC topology normally used in the isolation DC to DC stage for the 100W to approximately KW power rating because LLC is the soft switching topology to gain the best efficiency entire loading. This benefit is more significant in the lighting applications because it requires the ambient temperature up to 90℃ but without the air flow for thermal dissipation the LLC topology needs the best efficiency to avoid the power stage component over temperate stress. However, the LLC resonant tank design is not designed for wide input or output voltage range. This application note introduces the resonant tank design for lighting application and how UCC25640X addresses several limitations for the lighting application.