Stepless linear voltage regulation circuit applied to PSR flyback power supply

The invention relates to the technical field of switching power supplies, in particular to a stepless linear voltage regulation circuit applied to a PSR flyback power supply. The PSR flyback power supply comprises a voltage closed-loop control module, and the voltage closed-loop control module is used for carrying out voltage division acquisition on output voltage of the PSR flyback power supply and carrying out closed-loop control on feedback voltage obtained through voltage division acquisition based on reference voltage. And the stepless linear voltage regulation circuit is connected with the voltage closed-loop control module and is used for regulating the voltage division ratio corresponding to the voltage division acquisition according to the control signal so as to carry out stepless linear regulation on the output voltage. By adopting the scheme, the output voltage of the PSR flyback power supply can be subjected to stepless linear regulation. 本公开涉及开关电源技术领域，尤其涉及一种应用于PSR反激电源的无级线性调压电路。其中，PSR反激电源包括电压闭环控制