Dimming system for LED lamps

A dimming system for LED lamps, comprising a DC/DC converter, characterized in that:

• the dimming system for LED lamps comprises a dimming signal input module, and a brightness value conversion module electrically connected to the dimming signal input module, a dimming signal switching threshold setting module, a first signal output module, and a second signal output module, the dimming signal input module is configured to input a dimming signal, the brightness value conversion module is configured to convert the dimming signal into a brightness value, and the dimming signal switching threshold setting module is configured to preset a size of the dimming signal switching threshold to determine which one of the first and second signal output modules to control the output of the DC/DC converter, and when the brightness value is greater than the dimming signal switching threshold, the first signal output module outputs an amplitude dimming voltage to adjust the output of the DC/DC converter and turning off the output of the second signal output module, when the brightness value is greater than or equal to the dimming signal switching threshold, the value of the amplitude dimming voltage output by the first signal output module is equal to the dimming signal switching threshold while the second signal output module outputs a PWM signal, and the PWM signal modulates the amplitude dimming voltage whose amplitude is equal to the dimming signal switching threshold and then adjusts the output of the DC/DC converter.