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

摘要

PURPOSE: A power recover apparatus using a magnetic-coupled inductor of a plasma display panel(PDP) driving system and a designing method thereof are provided, which reduces the number of devices of a power recovery circuit, and reduces displacement power and EMI(ElectroMagnetic Interference). CONSTITUTION: The power recovery apparatus comprises a scan electrode sustain switching circuit(10), a common electrode sustain switching circuit(20), a power recovery part(30), a plasma display panel(CP)(40) and the first and the second non-insulate gate driver(GD1,GD2). The scan electrode sustain switching circuit and the common electrode sustain switching circuit comprise a plurality of switches(Sy1,Sy2,Sx1,Sx2) to apply an AC rectangular voltage of high frequency to the panel during a PDP emission period. The power recovery part suppresses power consumption by preventing a rapid change of a panel voltage and a capacitive displacement current during a sustain period, and comprises a magnetic-coupled inductor(CI) and two switches(Sa,Sb) and two diodes(Da,Db).