Study of stability of DC power considering the degradation of MOSFET

DC power is the core technology of various power electronic devices and the MOSFET is the key component to affect DC power. In order to research the degradation of MOSFET effect on DC power, we construct an equivalent circuit of MOSFET, and establish the discrete iterative mapping model of the system in continuous current mode. After verifying the impact of MOSFET parasitic on the stability of the system, we study the influence of parasitic parameters based on the nonlinear behavior. The results exhibit that the degradation of MOSFET results in the change of nonlinear behavior of output voltage and influences the stability of the system.