The performance of LED display drive power supply is closely related to the input aluminium electrolytic capacitor.According to the basic characteristics of aluminium electrolytic capacitor and the basic principle of LED display drive power supply,and the ripple current and failure mechanism of aluminium electrolytic capacitor,the ripple current and failure of input capacitor of ultra-thin and high-power LED display drive power supply are tested and analyzed through examples.It provides ideas and basis for rational selection of aluminium electrolytic capacitors,accu...