This document discusses different power converter topologies that can be used for LED lighting applications. It begins by introducing LEDs and their advantages over traditional lighting. It then categorizes power converter topologies as either non-isolated or isolated. For non-isolated topologies, it describes the buck, boost, and buck-boost converters in detail, including their operating principles and voltage gain equations. It also discusses isolated topologies like flyback converters and notes their use of a transformer to provide isolation between input and output. In concluding, the document provides a classification of isolated converters as either asymmetric or symmetric based on their magnetic operating cycle.