Energy recovery apparatus and energy recovery circuit design method using a coupled inductor in the plasma display panel drive system

摘要

An apparatus for recovering energy using a magnetic coupled inductor so as to drive a plasma display panel (PDP) and a method for designing the same. Accordingly, reactive power and heat dissipation amount are reduced without having an additional isolation gate driver. The apparatus improves the recovery rate of the reactive power by applying the magnetic coupled inductor to an energy recovering circuit at the time of charging/discharging the PDP and by connecting the source electrode of a switching device in the energy recovering circuit to the ground. In addition, the apparatus reduces electromagnetic interference (EMI) by reducing switching loss to zero and by not generating a sudden change in panel voltage. The apparatus further simplifies the circuit structure of a gate drive terminal and reduces the number of circuit elements compared to an existing PDP drive circuit.