Resistance-capacitance buck circuit

The utility model relates to a resistance-capacitance buck circuit, comprising a power supply circuit, a resistance-capacitance buck circuit, a rectification circuit and a voltage stabilizing circuit; wherein, the power supply circuit, the resistance-capacitance buck circuit, the rectification circuit and the voltage stabilizing circuit are connected orderly. The resistance-capacitance buck circuit is characterized in that the voltage stabilizing circuit comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit, the first voltage stabilizing circuit comprises a first-stage voltage stabilizing circuit and a second-stage voltage stabilizing circuit, and the first-stage voltage stabilizing circuit and the second-stage voltage stabilizing circuit are in series connections; the output end of the second-stage voltage stabilizing circuit supplies a working voltage VDD2 for a central control unit, an AD detection loop, a display module and a button module on a control panel separately, the input end of the second voltage stabilizing circuit is in electrical connection with the output end of the first-stage voltage stabilizing circuit, and the output end supplies a working voltage VCC for a heating controller. By using the resistance-capacitance buck circuit of the utility model, the problems are solved that the power supply output voltage of the resistance-capacitance buck circuit is unstable due to the different loads and the power supply anti-interference capability is poor, and the reliability of the resistance-capacitance buck circuit is high.