Multistage aperture LED lamp control circuit with smooth power supply

The utility model discloses a multistage aperture LED lamp control circuit with smooth power supply. A multistage aperture LED lamp comprises at least two circular LED substrates (1), and an LED lamp string is arranged on each circular LED substrate (1); an AC-DC converter is connected with a mains supply, a DC output end of the AC-DC converter is connected with a high-frequency suppressing magnetic bead L, the other end of the high-frequency suppressing magnetic bead L is connected with a power supply input end of a single-pole multi-throw switch, one end of a filtering capacitor C is connected with a common connection point of the high-frequency suppressing magnetic bead L and the single-pole multi-throw switch, and the other end of the filtering capacitor C is grounded; and an enable signal input end of the single-pole multi-throw switch is connected with a switch driving signal, and an output end of the single-pole multi-throw switch is respectively connected with the LED lamp strings. According to the multistage aperture LED lamp control circuit, an LC filtering circuit can effectively remove residual AC clutter after AC-DC conversion through filtration, so that the output of direct current source is more smooth; the multistage aperture LED lamp control circuit supports the adjustment of multistage apertures with different radius, can adjust the lighting aperture freely according to user needs, has good lighting effect and can effectively reduce electric energy loss.