Optimal hysteresis control method for CCM driving of a single-stage PFC flyback converter for LED lightings

Current control of CCM for various converter applications can be implemented by using hysteresis control method which is simple and easy implementation. Hysteresis control band can be generated using the method for multiplying the current reference. In this case, there might be problems that a high switching frequency is generated in the low current section. In this study, in addition to multiplication method, the sum method and the compound method are proposed. This approach can solve the high switching problem in the low current section. Better power factor, THD and efficiency are also expected. The proposed algorithm was verified through simulation and experiments.