Design of a Small Power LED Downlight

A 12 W LED Downlight has been designed.Drive power part adopts MT7930 controller chip,internal integration of various protection circuits was integrated on the chip,the drive circuit structure is simple,power factor correction effects sound ideal and using electromagnetic interference suppression technology can satisfy electromagnetic compatibility requirements.Some key parts of the drive power basic function circuits are demonstrated.Finally,the LED cooling principle and the shell cooling scheme are explained.The whole lamp test results show that the design of LED downlight in efficiency and power factor,total harmonic distortion,electromagnetic compatibility and cooling aspects effect are all good.