Chaos phenomenon in UC3842 current-programmed flyback converters

This study studies the chaos phenomenon in a UC3842 current-programmed flyback converter. The primary side magnetizing inductance current of a transformer during the conversion operation is considered in continuous-conduction mode (CCM). The nonlinear behaviors of system operation from period-1 to doubling-bifurcation and to chaos is studied by varying the input voltage of the converter. First, mathematical models and discrete-time analytic solutions of the flyback converter are derived. Second, MATLAB/SIMULINK software to simulate the nonlinear behaviors of the converter. Furthermore, the actual circuit is implemented, and experiments are performed. The consistency of simulation and experimental results confirm that the proposed mathematical models and discrete-time analytic solutions accurately model the nonlinear dynamical behaviors of this converter.