Self-tuning PSM controller based on state machine

A self-tuning pulse skip modulation (PSM) controller based on state machine is proposed in this paper. Four kinds of duty ratios are designed in the self-tuning PSM controller to balance the input energy and output energy. With which, the self-tuning PSM controller can make the power switch converter response quickly and the energy transfer better, as well as, avoid the real switching frequency entering into audible range with small output voltage ripple besides good stability and high efficiency. Analyses, simulations and experiments show the self-tuning PSM control technique based on the state machine is a good regulating mode for power converter.