New type of phase-cut dimming power supply

A new type of phase-cut dimming power supply, characterized by comprising an AC input filtering and DC conversion circuit (1), an active power factor correction circuit (2), a fly-back high-low voltage isolation conversion circuit (3), a synchronous rectification circuit (4), a voltage stabilizing circuit (5), a dimming circuit (6), a single-chip microcomputer control board (7), a PWM signal to analog signal circuit (8), a phase-cut control circuit (9), and an external load (10).

• The output end of the AC input filtering and DC conversion circuit (1) is connected to the input end of the active power factor correction circuit (2);
• The output end of the active power factor correction circuit (2) is connected to the input end of the fly-back high-low voltage isolation conversion circuit (3);
• The output end of the fly-back high-low voltage isolation conversion circuit (3) is connected to the input end of the synchronous rectification circuit (4);
• The output end of the synchronous rectification circuit (4) is connected to the input end of the voltage stabilizing circuit (5);
• The output terminal of the voltage stabilizing circuit (5) is connected to the input terminal of the fly-back high-low voltage isolation conversion circuit (3);
• The output end of the synchronous rectification circuit (4) is connected to the input end of the external load (10);
• The input end of the dimming circuit (6) is connected to the output end of the external load (10);
• The control output terminal of the single-chip microcomputer control small board (7) is connected to the input terminal of the dimming circuit (6);
• The output end of the aforesaid AC input filtering and DC conversion circuit (1) is connected to the input end of the phase-cut control circuit (9);
• The output terminal of the phase-cut control circuit (9) is connected to the input terminal of the PWM signal-to-analog signal circuit (8);
• The output end of the PWM signal to analog signal circuit (8) is connected to the input end of the single-chip microcomputer control board (7).