Non-isolated low power factor (PF) LED driver refers to a power supply design method in LED driver power supply design, where electrical isolation technology is not adopted, that is, the input end and the output end are not electrically isolated through magnetic components such as transformers, and the power factor (PF) is relatively low. This design usually has the advantages of low cost, small size and high efficiency, but sacrifices a certain degree of safety. Because the input end and the l…