Lighting control circuit, lighting control method, and lighting circuit

A lighting control circuit, comprising:

• a main power transistor;
• a protocol conversion circuit that stores received input data signal as multi-channel digital signals;
• a dimming selection circuit that is coupled to the protocol conversion circuit, and selects a second-channel digital signal and a third-channel digital signal to be output as a first dimming signal or a third-channel digital signal to be output as a second dimming signal according to a value of a first-channel digital signal;
• a feedback circuit that is coupled to the dimming selection circuit and generates a reference signal according to the second dimming signal and an output feedback signal;
• and
• a driving signal generation circuit that is coupled to the dimming selection circuit, the feedback circuit, and a control terminal of the main power transistor, and generates a driving signal according to the first dimming signal to control an off time of the main power transistor to achieve a first dimming mode, and generates a driving signal according to the reference signal and the output feedback signal to control an off time of the main power transistor to achieve a second dimming mode,
• wherein the first dimming mode is a chopper dimming mode, the second dimming mode is an analog dimming mode, the first dimming signal is a PWM dimming signal, and the second dimming signal is an analog dimming signal.