A high-efficient sustain driver with low current stresses for plasma displays

A high-efficient sustain driver for plasma display panels is proposed to recover energy stored in the resonant inductors as well as in the panel capacitors. By simply rearranging the circuit components without any additional devices, the developed sustain circuit is configured to eliminate the extra conduction losses and the current stresses on switching devices caused by the reverse recovery operation of the diodes. The energy trapped in the resonant inductors due to the inevitable diode reverse-recovery phenomena, which generates extra conduction losses and thermal problem with circulating currents, is recovered to the energy recovery capacitors in the proposed circuit. Therefore, the sustain circuit of the proposed driver can obtain higher circuit efficiency and lower current stresses on the semiconductor components than prior approaches.