A novel asymmetric current-fed energy-recovery circuit for a plasma display panel

A novel asymmetric current-fed energy-recovery circuit (ERC) for a plasma display panel (PDP) is proposed. Two ERCs composed of single switch and different resonant inductors, ERC-Y and ERC-X, are used for both sides of the PDP, and slow discharging and fast charging times can be employed. The ERC-Y discharging C_p to zero employs the slow discharging time, which reduces a current stress on ERC-Y compared with ERC-X. The ERC-X charging C_p to V_s employs the fast charging time, which ensures a stable light emission. Furthermore, inductor currents are built up before the PDP is charged and discharged. These built-up inductor currents help to fully charge and discharge the PDP, achieve the zero voltage switching (ZVS) of main switches, reduce an electromagnetic interference (EMI) noises, and compensate for a large gas-discharge current. Therefore, it features the ZVS, low EMI noises, low current stress, and high energy-recovery capability. The operation of the proposed circuit, design considerations, and experimental results are presented to show the validity of the proposed circuit.