Dimming control system for regulating pulse width by employing silicon-controlled small conduction angle

The present invention discloses a dimming control system for regulating pulse width by employing a silicon-controlled small conduction angle. The system comprises a controllable silicon controller connected with an electric supply, the controllable silicon controller is connected with an AC sampling circuit, a wave shaping circuit configured to perform shaping of the AC sampling signals to obtainpulse width of AC sampling signals, a single-chip microcomputer configured to convert the pulse width of the AC sampling signals to output pulse width and a field effect transistor Q1 in order, wherein the conduction of the field effect transistor Q1 is controlled by the output pulse width, and the field effect transistor Q1 is connected with a LED lamp. The dimming control system for regulating the pulse width by employing the silicon-controlled small conduction angle employs a small silicon-controlled conduction angle range to perform large regulation of the pulse width range of the output pulse width and better reg